Quote:
Originally Posted by Juha
My contribution, in fact "Altea"'s
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Altea
…Soviets had no 100 octane fuel until late in war,except from Lend Lease deliveries. With standard 94 one (in fact real octane number 91-92)…Some pilots remember 100 octanes (blue) LL use in their front-line Yaks, with a 20 km/h speed gain and some overheating. But nothing official issued from soviet industry… the 3Б-78 (and 4Б-78 used on M-82) soviet fuels always had 93-95 (and 95-96) o. number from 1939, with some quality fall to 91-92 in some midwar deliveries…
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Altea
… The soviet 95 octanes fuel had exactly the behavior of a 95% iso-octane and 5% heptane mixture fuel on soviet CFR.
It (the 4B-78 ) was obtained by adding 4 cm cub of TEL to a natural 78 octanes kg raffinated from Bakou fuel. You can try owerdays, it’s still making 95 octanes by the same method.
Yaks were not using it, only M-82F/FN. The 2B-78 to 3B-78 mixtures for Klimovs 103A, 105, 106. And some 3.5B-78 for the M-107…
Germans were not using Eugène Houdry’s cracking methods, AFAIK. But soviets with american help, did. In 1943 they were building 6 such a reffineries under licence. So late in the war they had 95 (soviet number) basis fuels that could provide from 96 (1B-95) to 115 (4B-95) octane number fuels.
Juha |
The Soviets were producing only B-78 in 1940-41 this was their highest octane fuel at the time (aside from what they custom blended at the design bureaus) In 1940 they produced only 40,600 tons. In 1941 they planned to produce 200,000. It is for this reason that training on the aircraft that used B-78 was curtailed in the winter-spring of 1941 and resulting in few hours being logged by pilots on the newly delivered MiGs. They would not have survived without lend lease aid and the most critical part of that aid was the delivery of 6 refineries. The first I believe was delivered complete in 1942 only assembly required, instructions included and American Engineers sent to assist.
oquaig