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David Herbert

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David Herbert last won the day on June 19 2018

David Herbert had the most liked content!

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About David Herbert

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  • Birthday 04/02/1954

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  • Location
    Ayrshire, Scotland. previously Suffolk
  • Interests
    Heavy armour, plant, narrow gauge railways.
  • Occupation
    Retired engineer / odd job man

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  1. I was shown a photo once of a low garden 'fence' made from overlapping carrier sprockets, quite a number of them. It was allegedly well know to all the carrier owners in the area and as the guy was not interested in selling his fence, it got a bit shorter from time to time. I wonder what would be a fair swap for that carrier track ? David
  2. Quite right ! Thanks Adrian David
  3. This is an M4 75mm Sherman fitted from new with vertical volute spring suspension and built post August 1943. It is what is known as an "ultimate series" tank as it has the bigger front hatches that don't intrude into the less sloped glassis plate, the final version of the radial engine installation with the oil filler cap in the rear section of engine deck, no cutout in the lower edge of the upper rear armour. Inside the wiring, seats and most stowage are very different to earlier Shermans. The turret is the correct "high bustle" late 75mm one with the correct vision cupola but the gun mantlet and turret front are from a much earlier Sherman. The mantlet should be the full width of the turret front which should have extra slots in it for the mounting bolts of the M34A1 mount. It is possible that it was originally a 105mm howitzer tank as these had basically the same turret but with a different front, gun and mantlet but only by looking at the internal ammunition stowage would one know. David
  4. It's an Austin K3 but I don't know what 'ZC' means but it might relate to the original rear body, of which there were many types. There were 17,097 built between 1939 and mid 1945. Early ones had 34x7 tyres (later called 7.00-20) with twin rears. Later trucks were on 10.50-16 singles all round. Engine was a 60 hp six cylinder. There are very few left and in the UK that would be regarded as a good cab, ours have rusted very badly. Good luck with it. David
  5. I have one similar to the green one in the post above but of considerable age, painted red oxide and measuring 7 1/4" extreme length (which is rather shorter than the green one I think). It does not have the rubber nozzle. I have always assumed it was ex-mod as it came from a surplus dealer but there are no markings on it. It has a vent pipe that comes out of the base of the tube part and curves over the part that seals to the can. If the green one above had one it would be just visible at the very top of the photo. David PS, I have had mine for about 30 years and it was far from new when I got it.
  6. Oh that is depressing 😫. At least you have a better crank. David
  7. I think that all your points are good and that it is very acceptable to restore any vehicle to as close as possible to how it was at some point in its history. The problem comes when making it into something that it never was, or even more so if making it into something that it could never have been because a key 'improvement' (to use a silly example - air bag suspension) had not been developed then. To restore a Sherman to exactly how it came out of the factory is very difficult now, regardless of your budget, because some parts are simply not available and re-manufacturing them not really practical, so a degree of compromise is almost inevitable. Wherever you draw the line will draw criticism, mostly from people who don't restore things themselves. David
  8. Yes, Centurion. And very heavy ! David
  9. Could be caused by people putting EP90 oil in there. It eats bronze / brass even without a load. David
  10. In the 20s and 30s the Germans were building steam locomotives with Whitworth threads but metric head sizes. David
  11. And you have operated her for longer than the army did ! David
  12. As it says on the parts list, this is a special thread, invented by Leyland for that particular application. I used to work for Fodens and they invented their own threads for that kind of thing if there was no standard one that seemed right. Don't mess the nut up ! David PS, It couldn't possibly be UNF as that wasn't standardised until the early 50s. Before that the USA used American Standard threads from which UNF and UNC were developed but not all sizes interchange (like 1" UNF is 12tpi vs. 1"AF which is 14tpi).
  13. The small idler wheel below the sprocket was originally officially called the Tension Compensating Idler Wheel but that got shortened to Compensating Idler and then to Tension Idler which is a better term as it was sprung downwards by a small torsion bar but not linked to the rest of the suspension, unlike the Track adjusting Idler at the front of the tank which moves forwards as the front road wheel moves up, thus compensating for compression of the suspension and reducing nose diving when braking. The Tension Idler was to prevent the track bunching upwards between the sprocket and the rear road wheel when reversing, or when braking that track whilst going forwards. As the track is rubber bushed it is damaged by bending it sharply back on itself in the wrong direction. If driving forwards the tension of the sprocket pulling that part of the track will keep it straight however slack the track is. It does also contribute to guiding the track onto the sprocket and reducing flapping of that part of the track when coasting. They were kept in place for most of the US Army service life of M47s but were often removed by other users to reduce maintenance. David
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