KowaSix Fix - (Jammed Winder)

This posting is intended as a "community contribution" for owners of the "Kowa Six" medium format film cameras...


Its an old 120 size film SLR camera, and my Dad gave me his old camera that had not been used for years and needed some attention and that I thought I might enjoy using.
Anyway, as I said, it needed some maintenance since it had not been used in years. So, I was trying to "loosen up" the shutter (its a leaf-shutter type camera rather than the more common focal plane type shutter of most SLR cameras) and aperture settings in the lens which were a bit sticky with lack of use... and with no film in the camera I was winding and firing the shutter in quite rapid succession.
Somehow I managed to get the winding mechanism jammed so that it would not wind forward and would not fire the shutter.
I tried removing the lense and pushing all the buttons and twiddling everything I could but it would not budge... and I dared not force the winder forward because I felt sure it would break something inside.

What to do?... well, go check out the internet of course... Which I did and I found a fair number of posts in various places that sounded like my stuck winder problem but absolutely no solutions to the problem that applied to my situation... I tried the suggestions I found but my problem was different it seemed... And the only clear response for the more complicated problems was a recurrent statement of send it off to so-and-so in the US who is the repair wizard guy for these old cameras... oh and by the way it will cost you several hundred dollars to get it fixed!

Not what I wanted to hear.
So, undeterred I decided that Id have a go at it myself, and after quite a struggle I did manage to fix it without damaging anything else... And the fix in my case was not too complicated and I think others could do it so Ive decided to share that fix here.

The Fix
1) You will need to peel off the vinyl covering on the winder hub... Its held on with contact adhesive so its quite a job to get it off, but that's what you have to do to get at the 4x little screws that hold the winder top plate in place... Be careful to not tear the vinyl (It can be reglued onto the cover after)
2) Remove the 4x small screws with a very small Philips-head screwdriver.

3) Remove the winder cover plate... which is now held in place by the winding lever spring plate so you have to lift an edge and slide it out.

4) Now you have to remove the winder which means undoing the two central screws in the middle... Don't worry about the little ratchet mechanism cos if you are careful it will all stay exactly in place as you lift the winder up off the camera. If things do get disturbed though, its no problem to put the little cog back between the "gripping levers" when you reassemble it all.

5) Now you need to get access to the 5x small screws that hold the camera side cover on... Again you need to peel back the covering Vinyl to get at them... I have a picture here so you can see where the 5x screws are so you need not fully peel off the vinyl. (Note there is also a slightly larger 6th hole there that has no use that I can see)

6) Now the side cover should simply lift up off the camera and reveal the guts of the mechanical mechanisms in the camera body (very scary!) 

7) Right now we are ready to fix things... But to explain Ill show a couple of pictures... These two are of the camera mechanuism in loaded and in fired positions respectively... almost no difference right!

and here is a third one with the mechanism in the "jammed configuration"...


The difference appears very minor (mostly in the subtle position of the L-shaped lever on the right and a small nub of a lever sticking out from under the brass center hub near it..

 It all looks very busy in the picture but all we have to do to fix things is do some poking with a screwdriver... There is a little lever with a turned up tab sticking out from under that multi-armed steel top plate that the winder axle sticks up through... its on the left side and is more clearly seen in the picture below.

Now if you winder is jammed like mine was then you cant see that little lever... cos its stuck back under the plate... In normal conditions, the little lever is "wound-back" anti-clockwise as you use the winder to advance the film and reset the shutter.. and it ends up almost in the same place after winding.
And when you fire the shutter, that little lever snaps clockwise full circle around the winder hub.
But when you fire the shutter and wind the film advance knob at the same time, things can get out of synch and the little lever only manages a portion of the rewind circuit.
So... How to fix it
I held the firing button in (ie in "fired" position) and I used a poker (ie very small screwdriver) to release that little lever from being stuck... It releases in little "leaps" when you push it in the anti-clockwise direction, so you have to poke it from several angles and chase it back to the start position on the left side of the winding hub... … You know its in the fully fired position when it stops spring releasing and is just loosely sitting there.
And that's all you have to do!

Now if you temporarily put the winder back on with the two screws, you should find that its all working as it should be... The winder retracts the mirror and advances the film and then levers-through and keeps winding but without resistance and the camera is ready to fire... Test it out a few times and then you can reassemble the side cover and winder in reverse order and you are good to go. The vinyl coverings can be re used with some carefully applied contact adhesive too of course.

Anyway, that's my fix... Hope it helps someone :)

cheers

Grant

Bunch-o-Pics

Just some pictures of various projects and activities

My summer Frisbee (Ultimate) team

And I up-graded my old coffee table to be a bit wider... Well I had to refinish it, so I figured I may as well make it a bit wider while I was at it...I like the result.

Another Coffee table I made... I long ago ran out of space in my house for tables. But I like to make them so this one was a wedding gift for a friend... Its surf-board themed based on the upgrade I did to my old coffee table.:)

 And that Vespa project that I started a couple of years ago is making progress again... It was on hold for well over a year while I waited for a 12V CDI conversion kit for it to be available again... Its now running very nicely with a larger 177cc cylinder and piston (originally 150cc 2-stroke) and larger 10" wheels (much more stable than the original 8").
But there is still lots of work to do... I expect it to take all winter to get it road worthy.

And a work project (now that I'm a team manager again)... I have little competitions for the engineers... I challenge them to be creative and constructive. This is my test of what I can achieve for the next "Challenge". Its a "span" that can hold a 2 litre bottle of water off the ground and it must be constructed in 1 hour and be made from nothing but 25 sheets of ordinary office paper, and Scotch tape... and it can not be "attached" to anything (must just "rest" in place) In this case I achieved a span of 84" (over 220cm)... Now we will see what the engineers at work can do :)

Not much else going on. I spend my weekends tinkering on several motorbike and wood-work projects and a small marine aquarium.

And this is a thin slab of Maple burl that I will use for my next wood-work project... It wont be a table-top because its too thin (about 2.5cm... Itll probably be a jewellery box or the like :)

cheers

Grant

An I-Iwi Silence

... That's actually what it was called... Only in relatively recent history has it become known as an "eerie silence".

I only discovered this on my recent trip to Hawaii, and I'm pretty sure most people have no idea, so I'm "sharing" :)

So, that modern phrase of an eerie silence before something sinister happens is in fact a derived term and it has a Hawaiian origin.
It comes from an endemic species of bird that lives there... The "i-iwi"

photo credit: the American Bird Conservancy... borrowed from the website:

                                      https://animaloftheday.wordpress.com/2014/01/30/iiwi/

Interesting related facts are that the iiwi is part of the Honey-Creeper family and is endemic to the Hawaiian islands and while it used to be common all over the islands, these days its confined to the temperate and very rugged highlands because tropical mosquitoes that carry some very nasty avian diseases cant live up there... and mosquitoes were only recently introduced to the islands by humans.
And the iiwi is part of a large group of endemic Hawaiian birds (about 50 in total) that are all descended from a single ancestor species; the Eurasian Rose Finch. Interestingly, studies suggest that the original pair of Rose Finches somehow managed to arrive on Hawaii about 5 million years ago, and from there have evolved into 50 new species that all exploit slightly different ecological niches in the varied climatic/vegetation regions of the islands... And that means that (in the simplest form of a geometric progression) that it took about 900,000 years to differentiate one species into two different ones... That seems like an excessively long time to me for an animal with a relatively short lifespan since Id have expected it to take only about 50-100 thousand years... So, that suggests that there may have either been lots of intermediate species that went extinct for their own reasons or that other factors have interfered and evolutionary processes have had some pretty long "stable" periods on the islands and there have been some occasional but very  "disruptive events" that prompted the bursts of rapid evolution of the birds...   Or, I could be completely wrong because I'm not an evolutionary scientist and don't really know what I'm talking about
... Just between you and me, I suspect its that last option :)

Rosefinch (Carpodacus erythrinus)... Image borrowed from Wikipedia.

Anyway, back to the main story line:
So, the iiwi lives happily on the islands for a few hundreds of thousands of years after its species has evolved there. Then along came the Polynesians who only managed to sail there canoes there for the first time about 800 years ago!... That's really really recently! (I bet most people don't know that!)
It was only about 550 years later that British navigator Captain James Cook arrived at the islands and made the first European contact with both the land and the people (in 1778 I believe).
But, in that 550 years, the Polynesians developed their own cultural peculiarities (though much of their culture is shared by many other Pacific islands including as far South as New Zealands Maoris)... And that phrase I mentioned at the start of this post "iiwi silence" is a tinny little piece of that Hawaiian heritage. You see, the newly arrived Polynesians set about doing what all humans do when they come across new places and new things... They named everything as seemed best to them, which is how the iiwi got its name, but they also utilized the natural resources however they saw fit too, and for the iiwi, that meant they used its bright red feathers as clothing/decoration in the form of beautiful feather cloaks for their royalty. A single cloak could have up to 250,000 feathers in it! Incidentally the New Zealand Maori have a very similar tradition with cloaks made out of Cassowary/Kiwi feathers and added Kakapo green feather highlights... The Hawaiians used the yellow feathers of the mamo bird as highlights (It was an extinct species but I think I read somewhere that it had been recently rediscovered in some remote Hawaiian local??).
... but I digress again...
So, anyway, the Hawaiians learned all about their new land and all about the plants and animals in it... and they learned about the iiwi... And it turns out that the iiwis tend to move around their habitat in groups of a dozen or more birds (I'm not sure if its an extended "family" or just a community), and that they have an interesting habit of defending themselves as a group too. It seems that when any of the group detect a threat of some sort, they communicate it to their group with a call, and then the whole group goes completely silent. (I think usually its the Hawaiian hawk or 'io since I don't think there are any endemic non-avian predators on the islands that have been there anywhere long enough to have co-evolved this behavior in the iiwis). And then they promptly attack the threat as a group too... Individually the little iiwi isn't much of a threat to the hawk (though it does make a tasty snack), but in a group they can fend off the threat, much as we all have seen crows doing to hawks and other threats.

Image of 'io (Buteo solitaries) borrowed from Wikipedia site.

So, anyway, the native Hawaiians noted this and to some extent seem to have adopted the strategy for their own defence against threats... Which of course are most usually other humans!
... And once Europeans discovered the islands and started interacting with the Hawaiians, as always happens, there was some "cultural appropriation" on both sides of the equation and we "Westerners" acquired the phrase in the English language... and after a bit of miss-hearing and passing on of the phrase between multiple people, it became the phrase we have today... Eerie Silence!

... and one last interesting anecdote is that Captain Cook himself seems to have fallen victim to the proverbial iiwi silence when he was speared to death by a group of angry native Hawaiians on a beach during a return visit in 1779... Some accounts of the incident suggest that there was in fact a short period of apparent silence and stillness from the group before they suddenly attacked the English captain and his men!  ...


Things you didn't know :)
Cheers

Grant







...just to note that while there are many actual facts in this little tale, the main premise of the story is entirely fictitious... I made it up for fun :))

The Contractor Who Came In From The Cold

Its been ten years since I had permanent, full time employment...

There were a bunch of factors that led up to my "change in employment status", and in my change in employment outlook. The main factors were that Id been having a more and more stressful time at my job working as a team manager for a  higher management that was becoming more insecure, and less technically relevant... and that was coupled with a sudden downturn in the Tech industry and the foreshadow of the big economic crisis of 2008.
And so in early 2007 I was unemployed and frankly, relieved to be!

And after wandering around the Americas for about a year, and having "the time of my life" just spending time introspecting and without commitment, I "landed" back in Vancouver, but still with out much of a "plan". And at that point, I was approached by someone from my old employer (but in a different functional group) about doing some contract work for them... I was happy enough to take them up on the offer because I needed some income but wasn't at all sure what kind of "career" or full-time role I wanted... And it worked out well...
And that more or less led me to my "lifestyle" of the last 10 years with periods of contract work (with minimal responsibilities other than the quality of my own work) interspersed with long solo trips to remote and interesting places.

... And its been a great lifestyle but one suitable only for someone like me, with solid financial status, no dependents, and a well developed ability to spend most of my time alone and without social support/interaction.
But, as I'm sure anyone reading my blog babble has thought and noted, I do feel significant stress on a pretty regular basis (though it is on a long time cycle of every few years rather than every few months or weeks).  Its the price of the lifestyle... Contract work is not always available conveniently when I want to be working... and the situation gets harder to manage as I get older and am "less employable" as viewed by employers who don't already know me.

And so I find myself considering my options.
And over the past six months Ive been working (on contract again) in the same group and with the same people who I was working with 10 years ago when I was last employed full-time.
And it turns out the group is needing to grow again,
And it seems they have a bit of a "gap" in their succession planning with no current employees being senior enough to step up to a full project management role...
And there is currently a dearth of available senior electrical engineers here in the Vancouver area.
And my work friends from the past, who are all managers now them-selves, look at me and say , "Hey why don't you come back and manage this new project with us?"...

Hmmmm.
And so I consider what the job would be like...
And I think back and I remember what it was like working as an Engineering group manager last time...
With project schedules that constantly slip-out at the start and intermediate dates but don't slip at the end dates, and with upper management who constantly ask for reworked schedules that are "accurate and detailed" down to a day or two of granularity over a period of six months with a team of 8-10 people ... Completely ridiculous for a an Engineering Validation team whos job it is to find unknown bugs in hyper complex systems, with limited documentation; and when we find the bugs we have to investigate and find resolutions for them too... But it has to fit in that "fixed" schedule of course!
This is all nothing new though... Its always been the same irrational story... Its called "being a manager" in pretty much any Engineering company.
And I see my friends who as I said are now experienced managers, and I look at them and think "wow, those guys are so competent at whet they do, they are way better at it than I ever was!"  And I see how stressed they get by the conflicting demands on them. And I remember how that stress level made me "an angry person" all the time!... And I'm wondering why would I want to do that to myself again??
But I'm also thinking that well, yeah, nothing has changed in 10 years... The system is the same with the same faults and strength and I did it once and I can do it again. Its a forgone conclusion that "I'm gonna get burned" by the company's irrational schedule management systems...
But I'm older and wiser now; and I know I'm gonna end up as "the bad guy" in the schedule meetings! I know they are irrational!... I know I cant change them to plan better!
And if I know all this, then when the "finger of blame" starts getting waved around by people, and they direct it at me, I know I don't have to take it personally... But I also know that its oh-so-easy to sit back and say "I wont be affected by other peoples opinions" while I'm imagining the future and am not actively embedded in the situation... I know that that "outlook" will not last more than a few minutes when I'm actually experiencing it!  :)

... And so I'm weighing my options... The insecurity of contracting, The increasing difficulty of getting work as a low-level Engineer as I get older. The guaranteed high stress levels of going back into a management role, but the secure and higher income of the job...

And Ive come to my conclusion...
I'm gonna take the shitty stressful Engineering Manager job!
The overview of the plan is that Ill take the job and help my friends out for a few years... But I intend to do it only for 3-4 years. Im gonna take the bigger pay cheque and the constant employment and squirrel the money away for the next few years so that I can "secure my retirement". After that I hope to be in a position to never "have to have employment" again!... I can work if I want, but only if I want :)
In the mean time though I know I'm gonna have a less than relaxing few years... I'm gonna try really hard not to take things personally when things get rough at work (as they of course will). And I'm gonna work at bringing a couple of their current mid-level engineers up to full speed to be able to take-over my role as soon as possible. I'm hopefully gonna be contributing to a project that I feel is worthwhile and "adding something positive to our world" (though there is never any guarantee of that). I'm gonna definitely be aiming to do a good job for my team and help them each grow in the way they want to at work (and that is always "contributing something positive to the world").

And well, that's the hope. And that's what I'm gonna be doing for a while...
Signing employment papers next week (or so they tell me).

Lets see what happens ... Life is always a wild ride :))

Paid to Slide

A couple of months back, not long after the start of the Skeleton season up at Whistler, I got a call from one of my sliding buddies (Matt). He wanted to know if I was interested in helping out with a film project that was looking for some skeleton athletes. It was just going to be a few days work but it needed to happen very promptly and they were looking for some sliders to help out.
At the time I had just started a work contract after more than eight months without any work at all, so I was certainly interested in a little extra money... though at this stage I had no idea what the pay grade might be.
Now I'm not actually a particularly gifted skeleton athlete (way too old and slow to be competitive), and though I can happily slide from the top of the Whistler track with any kind of ice conditions (even most experienced sliders will not start from the top of the Whistler track because its so fast and powerful...dangerous), I would not have thought that Id be on anyone's list for being paid to do it!
But it turns out there were some "extenuating circumstances" that made the difference:
1) It was very early in the season and there were very few of us sliding at Whistler at the time.
2) The project needed people who could slide from the top of the whistler track
3) It needed to happen within about two weeks
4) They needed three sliders, all with similar build and size .. So we all look like the same slider when we have our helmets on. (because we can each only do about 6 runs a day from the top of the track before we get "sled head (concussion issues), and they need as many runs for shooting as possible.

So, there were some phone calls made and there were some slight adjustments to my working week so I could take an extra day for the weekend of "shooting", and I was able to confirm that I could do what they needed, when and where they needed it. And after that there was some running around to get some custom spandex suits made up (nothing fancy, just a plain blue so that all three sliders looked the same) and some documents were emailed around and signed and emailed around some more... And now I officially have an "Agent" for the film industry!

It turned out that they couldn't manage to get three local sliders who looked similar enough, so they ended up getting one of the sliders from over in Calgary (Mark) to fly out here to Whistler for the shoot.
Now, of the three of us, I was definitely the "third string", so I was only going to need to be on set for the actual shooting days, which was fine by me cos the other guys are definitely better sliders than I am, and I can only get a bit of extra time off work to do this.
So, about a week or so after the first call I find myself up at the sliding track early in the morning while the film crew with all their equipment and trucks and people and catering services etc are running around the place doing their thing...

Film crew and all their gear filling up the car park at the top of the track.

The project that we are filming is for promotional material for a Virtual Reality experience being put together by one of the large Asian electronics corporations (they have viewing goggles and 360degree video cameras that they want to sell to the consuming masses). The theme of the project is the VR experience of Skeleton sliding, which seems like a good idea to me since it really is an adrenalin rush to do it but its way too inaccessible for most people due to the need for training and access to the very few tracks in the world... And its all intended to coincide roughly with the upcoming Winter Olympics in Jan 2018 which will of course be the peak of the general publics interest in such odd activities as Bobsleigh and Skeleton... So that gives them about a year to take the raw footage from the shoot and do all the CGI and post production work that is needed.
In slightly greater detail, the intent is that the "experience" will start out with a regular entry to a skeleton run (run along the ice with the sled, then lunge forward at a sprint to land on the sled and start taking the steeply banking corners of the track as the speed builds... and then they want to get a little "creative", so there are going to be lots of coloured lights and the rider will kind of leave the reality of the sliding track and head off into a virtual reality ride through a psychedelic universe??? or something like that, and after a minute or so of that, they will come back onto the real world track and the coloured lights will fade away and the run will end at the bottom of the track.

The story board

Right so that's the intent, and the riggers are running around stringing up all sorts of coloured lights in the track and really, all there is for me to do is mostly sit around and wait till they need me to do a run.  Oh, and when we do a "run" we have to wear the camera rig... Which isn't as bad as it could be. The rig is an aluminium back plate with about a 20cm high post in the middle of it and on top of the post is a collection of 4 or 5 small camera cubes (very much like GoPro cameras but with better lenses) arranged to get a full 360 degree view of the run and record it in high def'...

The camera rig

Tech's messing with the rig. 

Mark and Matt each wearing a rig.

We sliders had some concerns about that post sticking up because it could really cause injuries if we accidently rolled over during the run, but after a couple of tentative early test runs, we figured itd be OK because the tech people on the film crew found that we went too fast for them to get good definition in the video... so they wanted us to go as slow as possible... So if we were going to be going really slow (and slow is about 110kmh-120kmh) then there was virtually no way we could crash :)
So, in order to go slow, the track crew (who look after the ice on the track) just let the frost build up on the track for a couple of days (which really slows us down when we slide).
The only other tricky part of the whole thing was that the camera rig weighed a couple of kilograms, has a significant wind resistance, and it isn't centred on the sled... With it sitting between our shoulders, its about 40cm forward of the balance point, and when we are going 100Kmh, that smallish object (10cmx10cmx10cm) actually has a lot of wind resistance...just try sticking your hand out of a car window at 100kmh and you can feel how much force it generates. The trick with that is that the weight wants to tip the sled forward (unstable), but the drag which only comes into play as the speed builds up, wants to tip the sled backwards. So for the first section of the track we are unstable and tipped forward but for the second half we are overstable and tipped back... It would make for a terrible run on fast ice but since we were on very slow ice we could manage it without too much bother.

So, for a couple of days I hung around at the track and watched filmy people do their "shooting" thing and occasionally Id get to do a run on the track with very slow ice and all sorts of fancy coloured strobing flouro' and LED lighting... (I have to say the lighting was really quite good and I wish we could keep the track lit up like that all the time :))  ) But it was actually quite boring most of the time.  As I said though, I was the third string slider and I think I got only about 6 runs in two days ... about half as much as the other two guys.

Matt and Mark waiting around for the director to give us the call to slide.

Mark waiting at the start block

Matt setting up for a run

Matt being released very slowly on one of the first runs

But I felt it was well worth the experience, and a few weeks later I got a cheque in the mail for several thousand dollars for my efforts!  I was super pleased with that since it has effectively paid for all my equipment and sliding runs for the last three years and fuel costs for the last couple of years :))

The only picture of Me at the start... I had the camera and so I took most of the pictures :)

 
So now, if anybody needs me for something filming related, I can just ask them to contact "my agent" I guess :)

...my stardom awaits!

Back in the Saddle

Update on my "situation" time.

Well, on the employment front, after more than six months off Ive got another short contract as an Engineer with my usual employer ... This is great news since it means that they are still willing to use contractors which I was not at all certain about since the company had been acquired by a larger company since I last worked there.
Ive been working again now for over a month and while its with a group I don't usually work with, I'm settling in well and enjoying it.  In truth though, a big chunk of the satisfaction is coming from a bank account that is now slowly increasing rather than rapidly decreasing :)
And my contract currently goes till end November only but there is plenty more work they need done (till end Feb or so) so there is a good chance Ill get an extension which I'm not counting on but which I would be very happy to get... we shall see.

On other fronts, its heading into winter again and I'm preparing to get back in the saddle of a Skeleton sled too.
My neck has been giving my quite a bit of discomfort for the last six months or so but I think that has a lot to do with me using non-optimal glasses for some of the things I do and so Ive got some new glasses and it seems to be helping a bit... But that not withstanding, Ive really been sitting-on-the-fence about sliding again this season.
I was feeling like I probably would not slide this year and then my friend Mat decided to buy a new sled and sell his old one... And well, since I had a job again... I couldn't help my self, so I bought myself a beat up old skeleton sled!

Now Skeleton sleds are about as rare as hens teeth in the Vancouver area. there are a few more of them in circulation at the Calgary track which is the base of all Canada-wide sliding activities. And because of their scarcity they are pretty expensive items... A brand new one from the leading manufacturer (Bromley of UK) will set you back well over $10,000. There are 3 or 4 other big names in sleds about and a few less known ones too but there are only a few dozen of each sold in the whole world each year.
Anyway, I am now the proud owner of an aging Davenport sled (which were the world leading marque about 20 years ago) and its worth about $1000 or so. Its been used quite a bit and there is some slack in the bushings now so it rattles a bit but other than that and the beaten up fibreglass base, its in pretty good nick.
And of course, me being me, Ive given it a bit of a renovation over the last few weeks...

So fist I took it all apart and had a look at it mechanically. Here is what the "skeleton of a skeleton sled" looks like:

It looks like just a few bits of steel welded together that you can bolt some runners too... But its actually a carefully engineered set of pieces that allow us to steer by body-weight shift...

 The front runner attachment point... Not much to see here other than the runner bolting in to one of the main stringers along the side of the sled at the front... The U shaped bar on the left is a front "bumper" which is the bit that hits the ice wall at about 130kmh when we steer it wrong :)

And at the back end you can see the runner bolts in again and there is another smaller bumper too... But there is some other stuff here too: Like at the front there is also the cross-member to be seen that keeps the two sides of the sled attached to each other but its not just a flat piece of steel, its actually a very slim "I" beam profile... and this stops the cross-member being vertically or horizontally flexible but allows it to be "twist" flexible... very important.  And there is that bolt sticking out the end of the stringer... Which allows us to squeeze the runner from the ends which makes it bow into a vertical curve and the whole runner/stringer becomes a spring bed that is balancing on its mid section on the ice ... as we rocket along at 130kmh.  And there is another bar ther tht is attached to the back of the stringer... That's the steering paddle... It allows the pilot to put lots of "emphasis" on one rear corner of the sled runner with pressure from one knee ...and twists the chassis to lift the opposite runner off the ice at the same time.

 And the "saddle" is what we call the padded metal cage on to of the sled that we lay our chest down in when we slide (arms on the outside of the cage and griping the steel bars at the back edge (so we don't fly out of the sled when we get air in the corners cos we mis-timed the exit... at 130Kmh.

But that saddle isn't one piece... Its split in two with an axle connecting the two halves at the front... again this allows the weight shift to maximize differences in loading the back corners of the sled so we can steer.

But all the intricacies of the chassis aside, I only slightly modified it by adding larger knee paddles (cos I'm taller than the previous owners and my knees were hanging off the edge :)
But the ratty old belly pan needed lots of work (it was cracked and crazed from years of use.
So I stripped off all the old coatings and paint and sanded it all down. Then I got some slow set epoxy and some black pigment and put a layer over the whole thing... Its self leveling and very penetrating despite its high viscosity so it filled all the old divits and worked into all the tiny hair-line cracks in the old gell coat. I'm hoping it will also stay just a tiny bit flexible so that it wont shatter like the old gel coat did as it aged... Stuff takes forever to cure though... It dripped off the edges for over 24 hours I kid you not.

So that was my base coat but it seemed a bit dull to just have another plain black sled, so I went surfing the internet for some sort of art to put on it... And came up with this... Dragon motif.

 Its maybe a bit fanciful I thought, but what the heck... I can always sand it down and start again if I don't like it :)

So, I made a simple stencil by cutting it out of paper and taping the paper to the sled pan. Then I sprayed adhesive over the stencil and quickly removed the paper... This left me with a sticky image of a dragon on the sled pan. Then I put gold leaf on the glue (what doesn't every one have a gold leafing kit laying around??? I know I do!)  And then I added a perimeter of glow in the dark paint to the image by hand ... cos I like it when the dragon glows as we ride up to the top of the track in the back of a cold wet pick-up truck in the dark of night ... Clearly I'm a child at heart :)))

 And then I put another layer of epoxy (clear coat this time) over the whole thing ... and waited another three days for it to cure...

And then I bolted the tray back on the chassis, put the padding back in the tray, and put the top cover back on the sled... And I guess I'm ready to go sliding again... Head first at 130Kmh and about 4Gs for about 60 seconds with my face just cm off the ice :) ... Lord preserve me from my own foolishness!  :)

Yep, Back in the Saddle indeed.

Another Table Top

Years ago, I bought a "Turkish Grill" (which is a large copper bowl on a low stand) to use as a fire-pit on my deck. And I built a stand for it to raise it up to about 50cm off the deck so that it would be comfortable to sit around in deck chairs (as we do here, rather than on our haunches as I imagine the original users would have).

And then I also got creative and built a perimeter "table" that was about 30cm wide and got some small and expensive coloured glass tiles and made a nice mosaic pattern for the table-top...

Skip forward about ten years and that perimeter table-top that I made has seen better days. It was built by gluing the tiles to cement board and then grouting in the gaps, but over the years it has not stood up to the test of Vancouver winters with lots of rain and freeze-thaw cycles etc, and its become rather tattered about the edges... And I have to admit that though it looked nice, it was not actually very functional since it wasn't wide enough to use as a real table, and cold drinks do tend to get rather hot when placed only cm from a fire! (yeah, maybe I didn't really think the whole thing through in the original plan :)

So, its time to either rebuild it or throw it out. And since I spent so much on those pretty tiles I decided I should try the rebuild path...

So, first I had the laborious task of peeling off each tile and individually scraping off the adhesive and the grout... It took me about a month to slowly work through that task!... There were about 5000 individual tiles to "process"!

The original perimeter table-top

Detail of the original mosaic pattern.

Its supposed to be the sun in the centre and ocean waves around the edge.

 But rather than duplicating the old design, I decided that it would be better to just make a dedicated table for use on my deck, separate from the Turkish grill/fire-pit. I figured that a table of about 1m diameter would be good, and I wanted to duplicate the same style of mosaic pattern cos I liked the original a lot.
So, first I did some arranging of tiles to try to determine what the new repeating pattern of tiles should be...

Initial pattern for 30degree repeats.

More detailed pattern.

Then it was time to build the table...
I decided Id try to cast the table-top out of reinforced concrete so that it would last better in the winters here... And to ensure the tiles were really solidly bonded to the concrete I decided to build the table in an inverted layer-cake fashion.
So, I made a 4-5cm high perimeter wall with a strap of flat steel and "glued" it down to a sheet of melamine board with bees-wax. Then I covered the board inside the perimeter with a thin layer of bees-wax so that I could stick the tiles down and slowly build up the full mosaic pattern.

The perimeter, the segmented circular plan, and the tub of all the tiles.

The melamine board covered in wax ready for pattern building.

 Then over the next week or so I spent hours sitting on the deck pushing tiles into the layer of wax after the sun had warmed it up and made it soft.

The final mosaic pattern finished and ready for the concreting stage.

Then the big day came and I got a bag of high strength concrete mix (contains higher percentage of cement than usual as well as synthetic fibres that give it lots more tension strength than regular concrete.
So, first I mixed up a small batch of the concrete but I added  lots of black grout mix to it and removed lots of the larger gravel from the mix (before adding the water) with a sieve. I spread this over the tiles and worked it in to all the gaps.
Then I immediately mixed up another batch of the concrete with full aggregate and somewhat less grout, and spread that over the first layer. Then I laid a couple of sheets of wire mesh with a 1.25cm square pattern (pre cut to fit inside the perimeter circle) and poured more concrete over the top and made sure it was well "bonded" with the previous layer of mix.

... And then I found I was out of concrete but my slab was not thick enough ... (typical lack of full planning by me )... so I rushed off to the hardware store and got another bad of concrete mix (slightly different type but still with fibre reinforcing) and mixed it up and filled the last of the perimeter.
Then it was time to wait...

I waited three days and then, with the help of a friend, flipped the whole cured assembly upside down and left it on the deck again for the sun to warm it... It warmed the dark coloured melamine board and softened the bees-wax that was gluing all the tiles to it and I was able to peel the board off to reveal my ne mosaic table top... A bit of work with a propane torch and a polishing rag and voila!
I have a new table top that is extremely heavy!

Then I looked on the local buy and sell site and found an old cast-iron table base that someone was getting rid of, brought it home and spent a couple of hours stripping off the old crappy paint and rust. Then I sealed it up and put the table-top on and the final product looks great :)

The end result.

Lets hope it lasts a bit better than the last one :)