fv1609

Isn't this a Stadium?

Yes I heard that Bob made me cringe whilst was stuck in jam from a day at the Tank Museum. (Ironcally when I got near Ringwood I saw the problem was a broken down tank transporter)

The definitive chart with 3x3 in samples is in: War Emergency British Standard 987C : 1942 Incorporating amendments issued December, 1944 and July 1945 CAMOUFLAGE COLOURS September 1942 There is well preserved copy in the library of Bovington Tank Museuem referenced as: 623.77 (41) CAMOUFLAGE/23

I think you are in the realms of fantasy there Tony, although it does suggest pea flour or mustard powder. No mention either of a NATO potato.

Tony I think three complete eggs was a little excessive for anyone, the REME manual suggests just the white of an egg.

I've been doing a bit more experimentation today :shocked: I repeated the measurements a bit later & found using the same holes, although the resistance remained the same, the capacitance had reduced a bit. Cleaning the prods & inserting them in new areas nearby still produced these new readings. All I can think that the cold potato was now a bit warmer now it had been indoors for a few hours. Anyway I found moving the prod insertion points closer increased the capacitance to such a point that the prods one cm apart had nearly double the capacitance of the prods at the furthest point. So a better result could have been achieved if the AA man had put the screws nearby to each other. The curious thing is that wherever I inserted the prods be it, near to each other, on opposite sides across the width or the length the resistance remained constant. Next I tried a carrot & this behaved in the same way with capacitance being greatest with the prods nearby. But the resistance remained the same here on both measurements as 1.1 megohms. I measured the capacitance as 0.08 mfd with the prods close by then chopped the carrot & it remained at 0.08 mfd So as far as vegetables go, size or even length does not matter :-D Looks like I'll be eating perforated vegetables tonight :shocked:

This is an old story that has cropped up Land Rover forums where someone measured the capacitance across a similar potato & was unable to detect any meaningful capacitance. Well I have just selected a similar type & size of potato using test prods that are about half an inch long probably similar to the length of the screws used & measured 0.09 mfd. So this is slightly under half the normal 0.2 mfd used in most distributors. Before penetration I measured the surface resistance from one end of the potato to the other & this was about 100 megohms. After penetration with the same prods the resistance fell to 1.2 megohms but this was with a multimeter at very low voltage. The role of the capacitor is to absorb the Back EMF from the primary which is in the order of 300 volts. The effect of this is to reduce sparking at the points to enable a more abrupt collapse of the magnetic field in the coil. This leads to an improved HT output than if no capacitor is used. I tested the resistance at 250 volts & found that the resistance fell to 0.01 megohms. So at 250 volts a current of 25ma will flow, clearly a useful path for the Back EMF. Apply a rough calculation for 12 volts only 0.01ma would flow & have negligible effect. So it looks as if the potato might be performing two roles. Acting as a crude VDR (Voltage Dependant Resistor) clipping the Back EMF & also providing about half the required capacitance.

John does your Taxation Class just say "Historic Vehicle" or has "Goods" crept into the class somehow?

http://marcusglenn.com/index.php?route=product/search&filter_name=bridge&filter_sub_category=true

I think this is it, I'll scan the location position in a few minutes.

So that would be high gloss Deep Bronze Green BS381C 224. Although it was introduced for Army vehicles of all types when it was known as BS381 24 in FVDE Spec 2012 in Jan 1948. Late 60s front line units depending on commanders feeling of theatre requirement would be Olive Drab BS381C 298 This British version of Olive Drab was added to BS381 in 1949. NATO Green BS381C was added to BS381C in 1980. IRR Paints Defence Standards were introduced in 1980 & instructions introducing the service use of IRR paints was issued in 1980.

When you say to "Matt" do you mean to Olive Drab or IRR NATO Green? Is there a particular time & role you are wanting to depict?

Well they still make Prestone (but its not 44 I'm afraid :-D) Don't know how it differs from wartime Prestone. http://prestone.com/?select_region=1

Tracing the story back the Telegraph page has been removed & googling is a bit thin on content with this caveat: Some results may have been removed under data protection law in Europe.

Perhaps not the most gripping HMSO book I have read recently. :-D Although this was 1962 there is still advice & guidance that today could be heeded by some departments (national & local) & many other organisations. Sometimes we still get asked a question in the negative, which if you answer literally gives quite the wrong impression to what one thinks the questioner was expecting eg Do you believe you are no longer registered? If you answer "No" it means I believe I am registered, yet some may feel moved to answer "No" meaning "No I'm not registered" Then you are asked to tick the Yes / No box. Then on the other side of the paper, presumably designed by someone else, you are asked to put "X" in the No / Yes box :yawn: Although I suppose they have got laid out better than this sort of thing from 1958, which is none too clear:

The recovery

Ian as I posted BJ was a 3.5kVA generator BN was a cargo, 2805-2790 corresponds to Mk 2 Sankey FV2308A None of my listings indicate the make of the 3.5kVA generator I'm afraid PS When I say Sankey I do mean Sankey. I'm afraid it makes me cringe when all small trailers are referred to as "Sankeys". As I say 2805-2790 corresponds to Cargo Mk 2 Sankey FV2308A. If it was 2805-2215 then it would be Cargo Mk 2 Brockhouse FV2308A

I need to check but the later 1/2 Ton trailers had 6kVa there were 18 different contracts for Coventry Climax & Onan

81 BN 68 Sankey, 2 wheeled, Cargo Trailer, 10 cwt DIS 1954/5 Contract No. 6/V/13891 Asset Code 2805-2790 Yes on 78 BJ 51 the Chassis No is as you have it. I was reading the line above for 78 BJ 50 which was similarly recovered & the ledger entries are a bit crowded.

= 3 1/2 KVA = 3.5KVA output from generator

Ian only saw your one trailer originally. 78 BJ 51 Trailer 10cwt Chassis No.TR392/1273 Receipt Voucher No. RQP30439 Delivery 7/10/54 Generator 3.5KVA Struck Off - not actioned? Recovered 13/2/72 Struck Off OSDD Ruddington 10/5/79 Sold as 15cwt Trailer 3rd day of Sale No. 160 Lot No.1392 Sale Date Thurs 11/10/79

Welcome Ian I like those sort of things as well. Does your trailer still have the generator?

Sean well the RR parts are correct, can't tell you about the S1. I've been caught out with RR exhaust valves as I had a set of RE25264 which fit but they have different collets to the more common RE3043