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

[NZtyphoon]

Originally Posted by Crumpp

You can figure they would have had a 4 to 1 stock of heads before they started modifying aircraft. They would maintain that ratio even if it limited the size of the force they could convert.

In that memo dated 20 March 1940, it states this will be done as service maintenance. That means it was done on the equivalent of an annual inspection....So depending on when the aircraft made its service maintenance inspection is when it would be modified.

* AP1590B/J.2-W (attached) 20 March 1940 (the "memo") states that the modifications were "already being done" as service maintenance, with no mention of it being done as an "annual inspection" (nor does it mention the service intervals of aircraft) - the "annual inspection" is pure speculation on your part, with no evidence, as per usual.

* AP1590B/J.2-W goes on to say that "Newer engines will already have Mod.No.Merlin/136 embodied" meaning all production engines from March 1940 did not have to be modified because Mod No. Merlin/77 (modified spigots Merlin/64 plus modified piston rings) was incorporated on the production line as a production modification (Mod.No. Merlin/136). But you didn't mention that inconvenient fact - just another example of your misreading/misuse of documentation.

How many Merlin IIIs built before March 1940 would have still been in operational use by July? The modifications Mod/64,77 & 154 also applied to Merlin IIs not many of which would have been in service by July 1940.

Much of the rest of AP1590B/J.2-W describes modifications needed to the cut-out valve, then it sets out the engine's operating limits and is a general note for pilots.

* The comment about a "4 to 1 stock of heads" is pure blather and speculation on your part, with no documented evidence, and with no relevance to AP1590B/J.2-W.

Once again, for your benefit Crumpp:

*Explain how the RAF ensured that only 16 squadrons used the fuel - with documentation. Explain why at least 30 Squadrons - Hurricanes Defiants and Spitfires - report the use of 100 octane fuel when you insist only 16 squadrons used it - with documentation please.

*Explain what happened to at least 52,000 tons of 100 octane fuel with documentation.

*List the 16 squadrons authorised to participate in trials, with documentary evidence showing they were only participating in trials.

*Prove that the Merlin III was designed for only 400hp - with documentation.

All the rest is a smokescreen, showing your total lack of evidence for anything you say.

Originally Posted by Crumpp

I have not seen anything that proves there were any more by September. What I have seen is misuse of information such as a single Inspection and Test certificate to build a case the entire RAF was using 100 octane or failure to explain an illogical use to reserve ratio.

The only one misusing/misrepresenting information is your good self -

* You have not explained, for example, why the "use to reserve ratio" of Other Grades of aviation fuel, including 87 Octane, were lower during the battle than 100 Octane fuel, reserves of which continued to increase throughout?

Please answer these specific questions instead of dodging them, as per usual.