The vast amount of arms and equipment that Russia used was made in Russia. In Stalingrad and other Russian cities some war production plants were still working while battles were fought around and in them. When Russia upped sticks and moved much of their war production east of the Ural mountains, the plants were working with in weeks, even before they had walls and roofs. Okay we did ship a load of equipment out to the Russians, but just how many pictures have you seen with Sherman Tanks, Spitfires and Hurricanes, you might spot the odd lorry here and there, but thats about all.
I often wondered if they melted the stuff we sent them down to make there own weapons.
You might be interested in the following:-
http://www.bbc.co.uk/ww2peopleswar/stories/94/a4142594.shtml
Leading Aircraftsman (LAC) William Parker
Later I was transferred to RAF Shibah which was near Basra and had two large hangers in one of which I found myself building Spitfires that had come by sea in crates to Basra.
Later I found out that at a meeting between Churchill and Stalin, Stalin required help from Churchill in the form of Spitfires to help in holding back the German advance towards the Russian town of Stalingrad.
The way in which the Russian pilots collected the planes was strange. Our pilots flew the spitfires over the border to Abadan in Persia from where they were collected. I did the engine check on the last one to cross the border.
When the work on the Spitfires ended there was a rumour that Stalin wished to give the Red Star medal to the airmen who has been involved in the supply of planes but this was refused by Churchill. To this day I do not know if this was fact or fiction.
http://lend-lease.airforce.ru/english/articles/sheppard/hurricanes/index.htm
Within days of Operation 'Barbarossa' on 22nd June 1941, Stalin was already asking for assistance in fighting the 'fascist aggressors'. His first request for 30 divisions to fight on the Russian Front was totally out of the question considering Britain's own state of affairs after being routed from France a year earlier and having other commitments around the world.
What Churchill did decide to do was to provide a supply of war materials to help Russia. This was not an easy solution to the problem of helping an ally, albeit quite a new and unusual one. The Armed Forces of Britain still required equipment, the same as that being requested by the Russians. The Russians were asking for Spitfires, to the consternation of the RAF who were still building up their squadrons and phasing out the Hurricanes. It was decided at the Moscow Conference - First Protocol to send 200 aircraft a month between October 1941 and June 1942. These consisted mainly of Hurricanes, but also Tomahawk IIB's and P39 Airacobra. (Later the Russians were to receive over 1000 Spitfires but did not actually like them in the end).
The Russians also received supplies of guns, tanks, clothing, rubber, engines, trains - anything used in wartime.
Hurricanes were to be the largest aircraft consignment of aircraft from the UK, put at around 3,000 Hurricanes of different marks. At this point, it was noted that there was no point sending hundreds of aircraft, Hurricanes especially, without showing the Russians how to unpack, assemble, operate and maintain Hurricanes with their relatively sensitive Rolls-Royce Merlin engines.