SimonBrown

Reminds me of Chieftain main and aux engine exhausts?

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/

1971 list of vehicles:

1951 list of vehicles:

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...

On 1/15/2024 at 5:22 PM, .303fan said:

It is a option to remove the ambulance body so you end up with a chassis and cab. Using a old 109 roof and quarter that to enlarge a roof for the project is a option. Same as building a plywood tub on it until a GS rear can be replicated. 

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 hours ago, David Herbert said:

It is certainly a Centurion and I think probably the floating one as it has an extension to the track guards that could be for the canvas screen.

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.

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?

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.

That is looking really good Terry. Many thanks for letting us know.

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

52 minutes ago, terryb said:

or just billet mill it from the cad?

Another option - yes.

19 minutes ago, David Herbert said:

Or you could 3D print a plastic pattern with a shrinkage allowance and sand cast in aluminium from it or to be posh you could 3D print a wax pattern and lost wax cast in metal from that. It is creating the original CAD file that is difficult and you seem to have that sorted.

David

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.

3 minutes ago, terryb said:

can you print in metals now?

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.

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...

I'm in GU51 postcode...tempted by the 6'...how deep is the bench?

3 minutes ago, Listerj123 said:

is this still available 

Indeed it its! Yours if you want it?

A while back, way before Covid kicked off, I offered up a field telephone to anyone who could put it to good use.

Cannot find the original thread...and its still here...and still availble. Rather see it used/loved than sat in the garage gathering dust...and occupying the latest project space ( YamTY250 mono resto not military but gotta love a 2-stroke).

Firefox with the ad blocker is the tool to deal with the mess. Works a treat.

The site is unsualble without some form of ad blocking. Unless the "feature" is removed its going to kill the traffic.

That does not ring any bells for MK/MJ I'm afraid.

1 hour ago, john1950 said:

If you get a copy of Bart H Vanderveen's book Fighting vehicles directory it will give you all of the information you require. 

Sigh. Thanks John this is much appreciated. 

I am looking at a copy of Bart's book on my bookshelf...I forgot I had it, and how detailed it is.

It does indeed tell me everything I need to know.

16 minutes ago, john1950 said:

It may be easier to look for wheel and tyre measurements then you can estimate for deflated tyres, or chassis height as I would imagine cabs will be deteriorating.

The good news is we can see (and measure) the roofs of the vehicles. They are remarkably well preserved and any difference between built and as-is should be less than significant. We are measuring metres, not mm, so we can tolerate lesser accuracy I think.

I'm interested to know the overall height of some vehicles that were loaded as cargo on the SS Thistlegorm:

• Albion AM643
• Albion BY3 (or 5) FBE
• Crossley Type Q
• Morris Commercial CS11/30
• Fordson WOT3
• Leyland Retriever 

In all cases the measurement I seek is from the floor to the top of the cab roof.

The 3D reconstruction is revealing a potential space under the lower cargo deck...the depth of silt is often above the wheels and is estimated to be at least 1m deep. These measurements will allow us to make a more accurate and refined estimate.

Any and all help much appreciated.

Seen today in sunny Corsica a Jeep in US markings.

Re-reading this I would agree:

Quote

 

Due Aden 13/9

ar  (arrived) 18/9

sd (sailed) 20/9

Due Suez 26/9

The "Due" in Aden was throwing me but comparing it to the one for Suez confirms.

2 days is a limited window of opportunity. Not sure how fast loading and unloading would take...apart from the hint of a full ship taking from due Suez 26th to 5th Oct estimated disch complete.

Quote

I wonder what the reverse cargo would have been ?

Or indeed her next destination?

Quote

It's a shame that the cargo list is not "out there" at high resolution so that it can be looked at closely by everyone.

Agreed...it would be very useful to aid research.