Quote:
Originally Posted by NZtyphoon
3) Not forgetting either that on August 7 1937 Rolls Royce had a "more-or-less standard Merlin II, running at 18 pounds boost on a special mixture of straight-run gasoline, benzol and methanol with a dash of tetraethyl lead, achieved an output of 1,536 hp at 2,850 rpm over a four minute run." (this was used for the Speed Spitfire). Price The Spitfire Story 2010 p. 107. Ergo the engine was already strong enough to take the extra power.
|
Its lovely to see how NZTyphoon constantly conflicts himself, posting the following, which noted that the Merlin failed its type test even a year later, on 4 April 1938.
In fact Merlins still failed type tests at much lower ratings in around November 1939:
and continued to have an increased failure rate even in August 1940:
http://www.spitfireperformance.com/dowding.pdf
Bottomline, NZTyphoon seems to like to boast about the development of Merlin outputs on single engines and on limited runs on tests stands, ie. 'more or less standard'
Merlins.
In connection to the 1536 HP achieved on the Merlin in August 1937 with a curious mix of gasoline, benzol and methanol, perhaps equivalent DB developments should be noted to cool of any undue excitement.
[b]11 November 1937. Messerschmitt Bf 109 V13 sets world record with
DB 601 Re/III - 1660 PS
8. Juni 1938
8 Juni 1938. Junkers Ju 89 V 2 sets altitude record with 4 ×
DB 601 Re/IV - 2060 PS each
30 March 1939. Heinkel He 100 V8 sets world speed record with
DB 601 Re/V - 2770 PS.
The above also explains why the 'Speed Spitfire' was never attempted. There was no 2700-HP Merlin...