Bug 174 on 12lbs boost. Review please.

[bongodriver]

Couple more..

p.s. ignore the second image, it has no relevance, I attached it by mistake.

[Crumpp]

besides wasn't 100 octane DTD 224?

LOL, NO, that was 77 Octane fuel, the fuel that DTD 230 replaced.

[Crumpp]

But considering 100 octane was in use by civil operators in Britain before 1939

Yes it was....

It actually was available pretty early. Problem was there was not way to make it in quantity or economically.

It was about 2 dollars a gallon in 1939 while 87 Octane was ~.15 cents a gallon.

[Crumpp]

How Much things cost in 1939
Average Cost of new house $3,800.00
Average wages per year $1,730.00
Cost of a gallon of Gas 10 cents
Average Cost for house rent $28.00 per month
A loaf of Bread 8 cents
A LB of Hamburger Meat 14 cents
Average Price for new car $700.00
Toaster $16.00

http://www.thepeoplehistory.com/1939.html

[bongodriver]

Originally Posted by Crumpp

LOL, NO, that was 77 Octane fuel, the fuel that DTD 230 replaced.

Yeah.....I eventually saw that, question is still can anyone find the oficial DTD number for 100 octane?

It was about 2 dollars a gallon in 1939 while 87 Octane was ~.15 cents a gallon.

Irrelevant, there is pretty much no upper price limit in times of war...hence why Britain was 'broke' by the end of war.

[Crumpp]

I am sure you can find all kinds of references to 100 Octane fuel in the 1930's.

Here is the Popular Science archives to help you out!

http://www.popsci.com/archives

It was quite a leap forward in fuel technology and was greatly anticipated.

[bongodriver]

Help me how?.....I wasn't highlighting surprise at reference to 100 octane prior to 1939, it's practically common knowlege.

No the real surprise is that you 'still' insist 87 octane was the main fuel in use......has anyone asked you to produce a shred of 'evidence' yet?

[Crumpp]

No the real surprise is that you 'still' insist 87 octane was the main fuel in use......has anyone asked you to produce a shred of 'evidence' yet?

Again,

Read the Operating Notes.....Spitfire Mk I, July 1940:

[Crumpp]

Not issued. Initially using a provisional specification R.D.E./F/100, later manuals refer to 87 octane, 100 octane or 150 octane fuels as such.

All aircraft fuel must be specified.

[Seadog]

Originally Posted by Crumpp

Again,

Read the Operating Notes.....Spitfire Mk I, July 1940:
http://img802.imageshack.us/img802/5...pecificati.png

Spitfire 1 entered service in 1938 and the reference to the Merlin II, an engine no longer in production by July 1940, indicates that this manual refers to a pre-1940 variant:

From the 175th production aircraft, the Merlin Mk III, which had a “universal” propeller shaft able to take a constant-speed de Havilland or Rotol propeller, was fitted. Just before the Battle of Britain a de Havilland constant speed propeller, of the same diameter as the two-position unit, became available. Although this was a great deal heavier than the earlier types (500 lb (227 kg)) it gave another substantial improvement in take-off distance and climb rate.

http://spitfiresite.com/2010/04/supe...ered-line.html

ii