Hurricane engine torque

[Viper2000]

1310 bhp at +12 psi, 3000 rpm at 9000'.

R.M.1.S. rating.

Alternatively, on 87 octane, you'd get 1000 bhp at +6¼ psi, 3000 rpm at 15500' (which is preserved in the R.M.2.S rating).

Harvey-Bailey, A. H. 1995 The Merlin in Perspective - the combat years 4th edition. Derby: Rolls-Royce Heritage Trust.

AFAIK these are static ratings (ie without intake ram effect; therefore the FTHs are somewhat lower than would be achieved during a level speed run).

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4800 lb-ft of torque into rather less than 7000 lbm of aeroplane means that the torque at the prop shaft would be able to oppose the entire weight of the aeroplane with a moment arm a bit more than 6" long.

To put it another way, a hurricane has a wingspan of 40'; so the semi-span is 20'.

The torque is therefore equivalent to a 240 lb mass sat on one wing tip.

There is also propwash and p-factor to consider.