Manifold pressure dropping during manouvers

[NickLappos]

queries accepted, nobody is perfect, especially me!

When the rotor blade cones, it flaps or bends upward. When the whole set does, the center of gravity of each blade is closer, so the rotor speeds up a bit (ice skater brings arms in) since the rotor's angular momentum cannot change, so the rpm increases to match the total energy stored in the system. When the rpm speeds up, the governor backs down a bit (or the pilot rolls off a bit of throttle.)

This is temporary effect, and does point out how hard it is to report any factor or answer any question. The turn is actually about 7 maneuvers done in sequence:

1) the entry cyclic from level, which results in an angular acceleration of the aircraft.

2) the angular rotation (roll rate)

3) the removal of some cyclic to stop at the bank (angular roll acceleration now opposite the bank).

4) the steady turn at a bank angle (comprised of complex pitch and power and yaw re-trims due to aerodynamics of the turn).

5) the roll-out, which reverses 1, 2 and 3 above

So, the MP does change during most of the above, for many reasons!

I answered for item 4, hoping that was the original request!