Inaccurate performance data for BOB fighters in COD comparing to RL data

[Glider]

Originally Posted by JtD

I've been looking at a few individual Hurricane plane histories. It is interesting to see that there are planes that came from a unit which has been documented to use 100 octane fuel, and went to a unit where there's no dedicated record, on occasion after having been to a maintenance unit. Imho, there's no reason to assume that the new squadrons weren't using 100 octane fuel as well, unless RAF logistics were run by brain dead people. If some folks around here have detailed resources, it might be worth a little more digging.

I did look at a number but not all of the squadron records of squadrons that formed after May 1940. I checked these records from formation until March (ish) 1941 and none of those records mention 100 octane, 87 octane or any issues. The assumption I was working on was that by March 1941 they would be using 100 octane in view of the instruction we have for all commands to use 100 Octane given in August 1940.
Given that, my view is that 100 Octane wasn't mentioned after May 1940 because it was standard issue.

[robtek]

Do you really believe that? Even after that a few post before it was posted that not all squadrons used 100 oct.???

[Seadog]

Originally Posted by robtek

Do you really believe that? Even after that a few post before it was posted that not all squadrons used 100 oct.???

Who posted that not all squadrons used 100 octane?

[NZtyphoon]

Originally Posted by robtek

Do you really believe that? Even after that a few post before it was posted that not all squadrons used 100 oct.???

And you really believe a statement made without any evidence whatsoever? ah yes "absence of evidence" etc etc - which can mean anything you want it to mean, including no evidence means that (supply event that can be proven because there is no evidence) must have happened because there is no evidence that it didn't happen. Conspiracy theorists discussing the assassination of JFK have long relied on a lack of evidence to prove that there is a conspiracy.

Taking that further I can claim that the Apollo astronauts found that the moon is made of cheese but on the way home the astronauts got hungry and made toasted mooncheese sandwiches out of the samples they were bringing back - the report was quietly dumped in a file, and the samples replaced by rocks, which is why there is no evidence that the moon is made out of cheese.

So far no-one has explained what happened to 52,000 tons of 100 Octane avgas consumed between July - end October 1940. Crumpp had a stab at it by saying it wasn't really consumed, just mixed, then it disappeared into an unexplained administrative hole. Really?

[JtD]

Originally Posted by Glider

Given that, my view is that 100 Octane wasn't mentioned after May 1940 because it was standard issue.

I agree at least as far as Hurricanes are concerned, as the policy was to convert Hurricanes first, Spitfires later. In May, Spitfires had at least been partially converted, meaning Hurricanes had to be complete. Necessary modifications were started in late 1939, so it adds up.

[Al Schlageter]

From POWE 33/1363, Report of actual production 100/130 and 100/150 gasolines and components. 1 bbl (barrel) = 35 imp gallons, 1 ton = 2240lbs

1944 150 grade 150 grade as a % 130 grade
February 24908 tons 221400 bbls 61.5% 15570 tons 138400 bbls
March 35483 tons 315400 bbls 69.6% 15491 tons 137700 bbls
April 4928 tons 43800 bbls 7.4% 52988 tons 471000 bbls
May 8033 tons 71400 bbls 17.3% 38329 tons 34700 bbls
June 24446 tons 217300 bbls 64.8% 13286 tons 118100 bbls
July 38790 tons 344800 bbls 71.7% 15300 tons 136000 bbls
August 31376 tons 278900 bbls 66.1% 16110 tons 143200 bbls
September 35640 tons 316800 bbls 66.6% 17910 tons 159200 bbls
October 24154 tons 214700 bbls 50.4% 23749 tons 211100 bbls
November 19384 tons 172300 bbls 54.8% 15964 tons 141900 bbls
December 33165 tons 294800 bbls 61.5% 20801 tons 184900 bbls

1945
January 31984 tons 284300 bbls 77.1% 9484 tons 84300 bbls
February 33525 tons 298000 bbls 70.1% 14310 tons 127200 bbls
March 23569 tons 209500 bbls 48.9% 24671 tons 219300 bbls
April 50141 tons 445700 bbls
May 56914 tons 505900 bbls

Total 150 production, February 44 to March 45:- 369,385 tons, 3,283,400 bbls, 114,919,000 gallons.

Total 130 production, February 44 to March 45:- 293,963 tons

Total aero fuel production:- 663,348 tons of which 55.7% was 150 grade.

The first plant to be able to produce 100 Octane fuel cheaply and quantity did not come into operation until right before the war started. There was a shortage of 100/130 grade through most of the war that is discussed in Allied Oil Committee meetings. Specifically it is mentioned in a 1944 meeting on adopting a higher octane grade as a limitation to the production of the more powerful fuel. The refineries cannot meet the current requirements and have never been able to meet them with the exception of a few short months in 1943. Therefore they do not want to devote any refinery capability to production other than the amount required for testing purposes.

You were saying Eugene.

http://www.wwiiaircraftperformance.o...roduction.html

We are all still waiting for you to ID the 16 squadrons that were the only squadrons that used 12lb boost/100 octane fuel in Sept 1940.