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amazing what you find when you have time


wally dugan

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 Always liked  the STALWART  l have five different catalogues  from ALVIS  on them and a one hour video of the factory the early trials the sea trials and its off road trials  the prototype water trials were conducted in a flooded quarry1931394830_stal1b.thumb.jpg.61e93c2e27800415c55cc88d4a84dbc1.jpg

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2 hours ago, fv1609 said:

Paragraph 2 is interesting. It might help dispel the belief that Bridge Classification is merely the weight of the vehicle & load.

load.jpg.bac8dc30363e6290201c5284b9f2f6df.jpg

Can you clarify Clive, was it to do with individual axle weights and the distance between them?  I seem to remember the Contractor trials vehicle had the lighter 30 ton rear bogie and 8.5 ton front axle leaving 60 tons plus for the 4 trailer axles.

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Mike this is from some notes I have made on the subject.

Bridge Load Classification (STANAG 2021) Introduced 1960-63

The bridge load classification was said to originally have represented by the rounded-up weight of the vehicle in tons. "The new system relates to the characteristics of the vehicle which includes overall weight, number of axles, distance between axles, axle load (unladen & laden), tyre size, ground clearance etc and bears no direct relationship to the former system." It must be remembered that is a STANAG, which is a NATO Standard applicable to many countries. The UK had already taken some account of factors other than weight. What changed in the U.K. was that the mechanism for calculating a figure was now standardised with other NATO countries.

The classification of bridges was also changed to take account of the effects that particular vehicles would have on the bridge. However, the application of the system is the same as before, in that only a vehicle load class less or equal to the bridge load class number may cross the bridge. The load class number is based on vehicles travelling at normal convoy speeds at a spacing of 100 feet. The classification also relates to ferries and takes into account an assessment of the state of the approaches to the crossing to produce an overall classification.

There was no point in UK based vehicles having a Bridge Class displayed, as the Joint Service Road Transport Regulations JSP 341 states that: The UK will not prepare classification signs for civilian bridges and ferries in UK territory in peacetime.

1st September 1959. Originally issued as SDM(L) 219/1, Computation of Bridge, Raft, and Vehicle Classification.

26th February 1968. Reissued at intervals until SDM(L) 219/3 cancelled and replaced by Defence Standard STANAG 2010 revised and reissued as edition No. 3.

Def Stan 23-2 Computation and Marking of Bridge and Raft Load
Classification Numbers for Military Vehicles

1803409146_Load2.jpg.c44f61556f2da496750708a34c740422.jpg

934410107_Load3.jpg.b53b93180b6d8229329b3324550bf1e0.jpg

1763173559_Load4.jpg.1896358484af67c47caf510889af88ea.jpg

735619108_Load5.jpg.b5100bd2415babef371c48d3b3a5441a.jpg

 

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I seem to have used up my uploads for that post. Here is the next one, but there are loads more charts, illustrating that Bridge Class is a very complicated subject & is a lot more than just the weight of the vehicle basis.

2132947703_Load6.thumb.jpg.539eb788af25e59c9b9fc37753603a44.jpg

 

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816t0n1.thumb.jpg.02c5852f6d7092bb5df213c0ab160d07.jpg816ton2.thumb.jpg.5af9308218f38c80b01050e263d58484.jpgThis is a study report to see if better use could be made  of commercially  available trucks in the 8 ton to 16 ton range as way of reducing  the overall cost of the fleet as you can see they used models for illustration

Edited by wally dugan
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Two more trials while packing l found a number of trials on the DYSON 50 ton trailer this is one of the later ones taking part in South Africa the ANTAR was the prime mover INDIA  and PAKISTAN were also supplied with results of these trials. It's strange how much you forget  of what you have collected there are trial reports that are comparison  trails just after 1945 of wartime vehicles and equipment such as motorcycles and  automobiles Bedford's  QL MW OY AUSTINS in the K  series K2 to K6  AEC's  in fact every thing airport.thumb.jpg.652068d6786d5fff8a59a00faeab41b8.jpg1888494100_dyson50.thumb.jpg.a7bb13e93c4d72ad3a67cedb1c42f7c0.jpg

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  • 1 month later...

IMG_0875.thumb.jpg.67168739356f5a2302158d2d74998364.jpgA couple of weeks ago a old friend of over forty years + died at the age of ninety one he had a better collection of military documents than l two boxes have come and in one which measures 22 L X 20 W X 24 H which is full of cardboard backed display panels all are of the CMP vehicles 3 in a set 

Edited by wally dugan
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