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

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Originally Posted by 41Sqn_Banks

I don't know if power at maximum continuous rating was 400hp, I've never seen a value for it. Rolls Royce always give International Rating, Maximum Rating and Maximum Take-off Rating.

Test certificates on fairly early Merlin II/III running on 87 octane show:

Rated power 990 b.h.p. at 2600 r.p.m. 12,250 feet at 6 1/4 lbs/sq.in. boost
Maximum power 1030 b.h.p at 3000 r.p.m. 16,250 feet at 6 1/4 lbs/sq.in. boost

The power curves at 12,250 feet give 829 b.h.p. at +4.2/2400 with Merlin II No.2855 and 822 b.h.p. at +4.2/2400 with Merlin III No.7491.

Merlin II installed in K.9787

Merlin III installed in N.3171

See also Merlin II & III ratings as shown in the The Merlin in Perspective, (Rolls-Royce Heritage Trust, Derby, 1983)