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David Herbert

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Posts posted by David Herbert

  1. Thank you Robin,

    I was there a couple of years after the 'incident' with the Ferret and was told about it by a couple of people who I respected so had no reason to doubt the story. I am grateful to you for putting the record straight and my apologies to everyone for introducing some fake news. I will edit my post to reflect this.

    David

  2. Edited: My thanks to Robin Craig for correcting the fake news that I had repeated in this post about a Guy with a Ferret at the Canadian Parliament, Please read his version below.

    I think that the risk to most of us is people like the guy in 101Ron's post above rather than terrorists but we should be aware that if something can happen it will do, somewhere eventually. No one believed that 9,11 would happen till it did....

    David

  3. I agree with all of the above but I would point out that Germany has had a requirement for some time that armoured vehicles have 'windows' cut in the frontal armour (which can be filled with sheet metal and disguised) so that the driver can be shot by a cop with a normal hand gun. This has only affected the UK if we need to export to Germany or to a lesser extent if we want to truck a vehicle through Germany. It has not soaked through to the rest of the EU (yet). I wonder how many times the German police have needed to shoot a driver ?

    Possibly we should give Germany the credit for causing the invention of the tank and the production of the majority of vehicles that users of this forum play with for fun. In fairness though the far right is a much bigger force in Germany and there are huge social pressures built up there that are hard to understand from the UK.

    David

  4. 2 hours ago, Tomo.T said:

     These tow hooks were a universal fitting on subsidy vehicles and all makes had them in the same position, without it seems, suffering similar problems to the same degree.  I wonder if some of the early chassis may have been formed too cold, setting up stresses, which later turned into cracks, with the horrendous conditions of service they had to endure ?

    I totally agree. I can see that towing could rip the dumb irons out of the chassis but the TOP flange of the chassis would be in compression, not tension and there seems not to have been any movement of the dumb iron within the chassis or loosening of the bolts. I think that this is fatigue cracking due to normal driving stresses and cold forming.

    David

    • Like 1
  5. Actually the limit is that the entire supply of air for combustion comes from a very high pressure cylinder. There is no way that a supercharger is going to produce those kinds of pressures and still leave much power to drive something. This engine produces the power that it does because it is only designed to run for about a minute and does not have to suck in air from the atmosphere and then compress it itself to produce self ignition. 

    Having said that I expect that it would be most impressive to run it off a 250bar full size cylinder of air. It might need a prop to give it some work to do to stop it over speeding though.

    David

    Sorry everyone, this is a response to the last post on page one, I thought I was looking at page two !

  6. 64EK26,

    Yes they were as you say on DD amphibious tanks but the subject here is the inflatable decoy tanks, trucks and also aircraft that were used to pretend that the invasion force was other than where it actually was. There were also decoys made of canvas over very light frames, that could be erected quite quickly and flat packed (sort of) to allow easy transport.

    David

  7. As you say, this part of the chassis should not be under great stress, particularly if the bolts / rivets have not been loose. However the Goslings' J was cracked in almost the same place. I wonder if it could be a result of weakness caused by the manufacturing process ? And why only the LH chassis rail ?

    David

    • Like 1
  8. If you get them Lost Wax cast there won't be any machining other than cutting off the feeder and any vents. The originals would almost certainly have been precision sand cast with the pin holes cored exact size and not bored afterwards. That does result in very rapid initial wear as the high points wear down but speeds up production and reduces cost enormously. This is how British dry pin tracks were cast until we changed over to rubber bushed live tracks for Challenger II. Please, no one tell me that this can't be done, I have watched new Chieftain and Challenger I track being cast and watched the whole finishing process up to dipping short lengths of assembled track into bitumen paint. But it does require very close quality control and scale to do it properly so not really practical for a single vehicle set.

    David

    • Like 1
  9. SWB series 1 Landrovers were only 80"wb until 1954. They then went to 86" wb which resulted in the rear edge of the cab doors to be vertical instead of sloping and the load area became 6" longer inside. In 1956 another 2" was added to make room for the diesel engine so the front axle and front cross member were moved forward. The resulting 88" wb was carried on into the series 2.

    I think the one in the photo is an 86" so built 1954 to 56.

    David

  10. Quote

    Anyone got any Panzer IV bits that they want to donate to a good cause, I know she would love me for that.

    I have a NOS Panzer IV track link if that helps.....

    I know the feeling, my Canadian Ram project started with an armoured filler cap cover.

    David

    • Like 2
  11. Simon,

    I think that the idea of the long hoops and extension pieces for the canvas was that you could have more headroom within the truck if you were not needing to be very mobile. The centre hoop could not be lengthened as it would overlap the wheel arch opening. Certainly you could use it as a tent (and there are photos of that being done with 8cwt tilts) but the radio instalation is very much built into the 15cwts and would then not be protected from the weather. This is a purpose built radio truck, not a GS truck with a radio. If the tilt were raised as I suggest the wooden planks that tie the hoops together would be useful in preventing the tilt blowing inwards .

    David

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