Originally Posted by
FGD135
You cannot tell from RPM alone whether the engine is "making power". Positive torque would be a more correct term for this, by the way.
To determine whether positive torque existed or not requires knowledge of the RPM and the propeller blade angle.
It is self evident that the torque produced by the L engine was a very low value. Possibly positive, possibly negative.
Splitting hairs over torque and power there old mate.
Why is it self evident that left engine at low torque?