I'm pleased to say I can return your favour. This is a 5-ton Artillery Tractor M17, a military version of the Holt 5-tonner.
It was deigned in collaboration with the Ordnance Department, using many parts from the Liberty Truck Engine, and intended to pull Divisional Artillery such as the 155mm Howitzer. They were built by Holt and by The Maxwell Motor Car Company. The basic tractor was clad with light armour capable of stopping .30 rounds. Some were fitted with a cab, and, interestingly, the lower track frame was hinged for better ground contact. Almost 10,000 were built. I think the one in your pic is a Holt. The one below is a Maxwell. Both were camouflaged, but the Maxwell had a brighter camo pattern.
Production began in July, 1918, so that fits with them being at what is obviously a Zeppelin shed, post-War.
There was also a 10-ton version.
Sorry about quality of photo - it's a scan of a photocopy.
Thanks due to Fred Crismon, US Military Tracked Vehicles. There's a section on Prime Movers. The book's very useful, but, again, expensive.
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
Actually, I've just had a look for the book, and there are a few on the Net at quite reasonable prices now. I know things from the US are cheaper in ££, but you can find one for £15-20.
It covers pre-WWI to the 1980s or 90s, and there is great info on all manner of WWI stuff: early tracklayers, prime movers, SPGs, all the early US Tank prototypes, cargo & personnel carriers, gun motor carriages - far more than I thought existed. Well worth it if you can spare the cash. Try Alibris.
And his name really is Crismon, not Crimson.
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"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
It's about a tractor, called "Bolshevik" in Russia. They used it as prime movers in Red Army AA artillery in late 20s and early 30s. AFAIK it was Holt design, but I haven't any data on its original model and performance.
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
Haven't had time to go through it yet, but it might help to identify where the 89th were stationed and the location of the airship shed.
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"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
I'm not sure about the "copies" of the Holt - from http://www.caterpillar.com/company/history
"1929 The Soviet Grain Trust purchases 2,050 Caterpillar machines. The Soviet Grain Trust farming organization purchased 1,300 Caterpillar tractors and 750 Holt Caterpillar combined harvesters for use on its large farm cooperatives. This sale helped to keep Caterpillar's factories busy during the Great Depression."
Later in the 1930s the Red Army had a number of types of specialised artillery tractors, e.g. the Komintern, Voroshilovets, T-20 and T-26T.