Hi Gibbage,
>Chief among these is a unit power control, incorporating an automatic manifold pressure regulator, which will control power, RPM and mixture by use of a single lever. It is obvious that there is a crying need for a device like that in combat.
Interesting to see this was demanded by combat pilots! I had not seen such a clear statement regarding its usefulness before.
(Prestel, the engineer behind the BMW 801 single-lever control, had asked "What does the pilot of a multi-engine aircraft do if he suddenly is forced to change the engine parameters quickly?" ... only to answer his own question: "He screws up." I'd say he had anticipated the problem ...)
>Most common error is to push the throttles wide open before increasing RPM. This causes detonation and subsequent engine failure.
I believe some Allied aircraft received so-called "inter-connected throttle and rpm levers" later that made sure that when the throttle was opened, the rpm lever was advanced at the same time. However, it might be that the connection had to be overridden for cruise in order to get the the best range from the engines ...
Regards,
Henning (HoHun)