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SimonBrown

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  1. Reminds me of Chieftain main and aux engine exhausts?
  2. Been testing some kit and chose some of the exhibits at Aldershot Military Museum as subjects. They have come out very well indeed: Wombat https://construkted.com/asset/a24wgkcnsc0/ Ferret: https://construkted.com/asset/aqi1caaxs1q/ CVR(T) https://construkted.com/asset/asrv7pb4xgr/ The technique involves stereo cameras to create scaled models without further constraints. More on the process here: https://accupixel.co.uk/2024/01/23/stereoscopic-photography-cameras/
  3. These were rescued from a skip sometime around 1988 I think. They have been lurking in the loft. Too many pages to scan the whole book, but if anyone has a specific vehicle of interest - quoting the FV number and name will be perfect - then I can see what the books hold. 1956, 1971 and 1980. The '56 and '71 books include all manner of trailers and general wheeled kit. Both have an index I will scan and add to the thread later. The '80 book covers much more. Aircraft, vehicles, weapons (silenced Sterling anyone?), pyro, dem kit...
  4. This has occurred to me. Part of me thinks it will be easier to start with a GS...and the purist says if its an ambulance it should stay that way. But then again, the vehicle I will rebuild will be as much a using/working vehicle as a piece of hardware so why not convert it? The second and bigger issue is not having the space - at the moment - to work on this size of vehicle. This may change in the near future, and if it does I will pop back and have a second think/look.
  5. So...next question...is it still in the collection? Does anyone know? I can feel a reprise coming on...with grandson added to the image.
  6. The photo is me as a small nipper and was taken (I think) at Bovington Tank Museum in the early 70s. Tank included for scale. But the question for the HMVF pool of knowledge...what is the tank is in the photo? I think its a Centurion...but is it?
  7. I can still remember what a PITA the ambulance variant was to work on when compared to the GS. Had this been GS...I would have been interested. But the memory still carries the scars! Best of luck rehoming it.
  8. That is looking really good Terry. Many thanks for letting us know.
  9. Update on progress. One advantage we have today is a wider range of commercially available and cost effective materials, and this includes the kind use in high volume plastic parts used for under the bonnet parts in mass production. Left to right; Original cast magnesium part now with two broken lugs and plastic filler. PLA fit/form SLA printed tester to validate model. Finished first-off production part in nylon with shot peen finish. Apart from shot peen finish this part is straight off the printer. The material is used in under bonnet components and is thermally stable enough, resistant to oils and is watertight. A spot of off-road testing will prove this out. Once the motor is back together. Is the match exact? No, but as the bike is Japanese I am very comfortable with the Kintsugi method. Full story here: Reverse engineering blog
  10. Yes to all. The wax pattern printing option is probably the way forward....and once in CAD applying a global scale factor to cope with shrinkage would be easy.
  11. This one comes under the "Can-I-Should-I" bracket. Short answer is yes and a wide range of materials are available. Longer answer is...how much do you want to spend? And do you really need it in metal? For me the cost of a metal housing is...expensive when compared with a under-the-bonnet nylon material. So for now I will go with a plastic that is heat and chemical resistant.
  12. This is not directly an MV related post, but it may be relevant. I'm restoring a Yamaha TY250 motorbike. A real 80s classic two stroke. Some of the parts are now unicorn grade and the LH crankcase cover is one of these. Made from cast magnesium alloy its a) fragile and b) difficult to repair and c) no longer made. I happen to run a company that specialises in 3D reconstruction. So I decided to scan, reverse engineer and 3D print one....the first sample for fit and form (not function...read on) has just arrived and I thought I would share the results. Firstly, the scan of the broken part: Then reverse engineered into a 3D CAD file: Damaged and printed alongside each other: Trial fit: Now this version is plastic and one that wont withstand high temperatures - hence not good for the "function" of fit/form/function - but it does prove the model is accurate and we can now print in carbon filled nylon (under bonnet injection moulded car parts) or in metals such as aluminium, steel or even titanium. I will report back when the "production" part arrives. In the meantime, maybe this will trigger a few thoughts...
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