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

[Crumpp]

I have no idea where your first post in this thread is, and i wasn't talking about you specifically.

Ok, we are good.

so i do disagree with you

No issue at all.

squadrons were converted in the main before July

Take the ones that specifically say "100 Octane fuel in use" like this one:



Just like this one, it will specifically state if they are using the fuel.

Throw out the ones that just note conversion like this one:



And you will have a more accurate idea of the timeline and extent.

It won't be dead on but at least you won't have conversion mixed in with use.

There is some very good knowledge in your community. It is hampered by the "us vs them", win-lose mentality, emotional investment, and immaturity of some the members.

[NZtyphoon]

Originally Posted by Crumpp

Take the ones that specifically say "100 Octane fuel in use" like this one:



Just like this one, it will specifically state if they are using the fuel.

Throw out the ones that just note conversion like this one:

Note what the 611 Sqn ORB says:

21/3: Fuel: The new aircraft are one by one being converted...for the use of 100 Octane fuel, instead of D.T.D 230.

By arbitrarily "throwing" the 611 Sqn ORB out because it says "conversion" instead of "using the fuel" the fact that it notes that 100 octane fuel was being used instead of 87 octane is completely missed, plus it says 9 aircraft converted. So dump that "rule".

Here are two other ORBs from February 1940, from before before the issue of AP1590B/J.2-W, March 20 1940. That's four squadrons, plus four airbases North Weald, Digby, Hornchurch (11 Group) and Drem 13 Group confirmed to be converted or in the process of being converted to use the fuel in Feb-March 1940 alone. All indicate that 100 Octane fuel was the only type of fuel being used by converted aircraft.

Before you say "only four squadrons" these are ORBs of the time which have been found so far, that does not mean that these were the only squadrons in the RAF to convert.

Those from February also show that the conversion of Merlins was well underway before A.P1590B/J.2-W was issued, confirming what the document says.

[NZtyphoon]

Now, to France 7 May 1940: the RAF stored 660,056 gallons, 2111 tons of 100 octane versus 561,076 gallons, 1,778 tons, of 87 Octane in France: this was before the balloon went up, 4 Hurricane squadrons listed plus 9 Blenheim, all operating with 100 Octane:





and was requesting extra fuel for Blenheims, 188 gallons each for the outer tanks, plus 280 gallons of 87 Octane for the inner tanks.



And here the projected requirement for 100 Octane was far greater than that for 87: 1,579,740 gallons, 5,007 tons V 950,000 gallons or 3,011 tons.



If the RAF was only interested in building up stocks of 100 octane fuel before releasing it for use why would 100 octane fuel be sent to France to support the squadrons of the BEF? I presume your assumption is that the 4 Hurricane squadrons and 9 Blenheim squadrons were to be used for "operational trials?"

On 7 May more 100 Octane was stocked in France than 87 Octane, and projected requirements for 100 Octane were also far greater - this for a fuel you say was only used in "operational trials".

The requirement to supply 9 Blenheim squadrons - note on the second to last page the stipulation "ALL reinforcing Blenheim units require aviation fuel, per aircraft as follows: (i) 100 octane. 188 gallons (ii) D.T.D 230. 280 gallons - with 100 octane contradicts the pre-war paper which stipulates that only 16 fighter squadrons and a couple of Blenheim squadrons were to use 100 octane fuel before September 1940.

[Osprey]

Originally Posted by NZtyphoon

If the RAF was only interested in building up stocks of 100 octane fuel before releasing it for use why would 100 octane fuel be sent to France to support the squadrons of the BEF? I presume your assumption is that the 4 Hurricane squadrons and 9 Blenheim squadrons were to be used for "operational trials?"

Don't be ridiculous NZ, obviously one of the safest places you could store and build up your stock of precious fuel is on the front line facing the enemy when you in full retreat. Don't use it mind, there are only lives at stake - it's more important to build it up first.