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

[Glider]

Originally Posted by Crumpp

Thanks for your service, Flanker.

I retired 20 years from active US Army and then entered aviation as a full time career.



I don't think associates get library access, not sure though. I have only had student membership and then full after graduation.

Then I withdraw my previous comment.

[Crumpp]

beaurocratic schedules

It is not a bureaucratic schedule.

I know it seems like a bunch of overkill. The convention is really all based on lots of experience, most of it very bad experiences.

Airplanes are not like cars, the engineering safety margins are so much lower just to achieve flight.

[Crumpp]

You claim that that the June 1940 manual does not reflect the ability to use 100 octane fuel operationally.

NO, I said if it was in use in all operational units, Notes on the Merlin Engine would reflect that.

It does not in June 1940.

[Crumpp]

I found this page from the Spitfire Mk II Operating Notes.



mmmmmm

[winny]

Originally Posted by Crumpp

I found this page from the Spitfire Mk II Operating Notes.



mmmmmm

Ok here's my MkII from June 1940



And I'm still waiting for your answer, and an apology would be nice for the operational/logistical thing that you said made me look bad.

[Crumpp]

we're only talking about implementation of simple modifications in order to use a fuel that increases performance,

It is not a simple modification though.

[winny]

Your ignorance speaks volumes.

[bongodriver]

Originally Posted by Crumpp

It is not a simple modification though.

Simple enough.......it wasn't exactly rocket science.

[NZtyphoon]

Originally Posted by Crumpp

It is not a simple modification though.

The Merlin II III and IV were already being tested on 100 Octane in 1938:
http://www.flightglobal.com/pdfarchi...0-%203453.html

Rolls-Royce were able to get Merlin IIs and IIIs running on 100 Octane and 12 lbs boost by November 1939 - for the latter what was needed were the modifications to the boost control capsule; the modifications to the head needed for 100 octane would have been underway well before this.

100 octane "now in use" in April 1940
http://http://www.flightglobal.com/pdfarchive/view/1940/1940 - 1142.html

To pretend that it took until 1942 to perfect the use of 100 octane is, as per usual from Crumpp, completely wrong, because Rolls-Royce was already testing engines using 100 octane fuel in 1938.

Timeline:
Merlin 45 (100 Octane Fuel): decision to use it in Spitfire; December 1940; Spitfire V operational February 1941 92 Sqn.

Merlin RM6SM Became Merlin 61: First tested Spitfire III; September 1941; Operational Service Spitfire IX June 1942 611 Sqn.

Crumpp's idea that 2 1/2 years was needed for testing is completely wrong - as per usual. New engines in a standard or modified airframe took less than a year. To declare that it took 2 1/2 years to test and approve 100 Octane in wartime is absolutely idiotic. Again, Crumpp is arguing for the sake of his ego, meaning this will continue forever because Crumpp's Never Wrong.

[Glider]

Originally Posted by winny

Ok here's my MkII from June 1940



And I'm still waiting for your answer, and an apology would be nice for the operational/logistical thing that you said made me look bad.

A couple of observations on both those pilots notes.

Crumpp
If you look at the pilots notes that you put forward you will see that they also include the instructions of how to fire 2 x 20mm cannon and 4 x 303 which I think we can agree isn't viable in June 1940.

The second set. Note that it doesn't allow 12 lb boost in the air it only says 9lb. However it doesn't say that you can or cannot use the boost overide, or have a combat rating. However, in the cockpit diagram the boost overide control is clearly present. An example I think of an early set of pilots notes which were clearly amended as shown by the ones that Crumpp mentioned.

Reason for both fuels being mentioned in the set Crumpp put forward is simple. Clearly these are not BOB notes as shown by the guns on board and these were printed later in the war wehn they were in use for training. Training units were not equipped with 100 Octane