DHC-6 Questions:

[avionimc]

Michael,

Many thanks for the in-depth comments and remarks.

About twisting the power lever in flight, a good reminder not to do it is the March 2001 accident of F-OGES on approach to TFFJ. Prior to the accident the pilot reported that he used to use "beta" in flight in order to slow down during the [non-conventional] approach to this particular runway. Video footage (and audio) taken by a PAX during the flight was retrieved from the wreckage and supported the probable cause.

PROBABLE CAUSES: "The accident appears to result from the Captain's use of the propellers in the reverse beta range, to improve control of his track on short final. A strong thrust asymmetry at the moment when coming out of the reverse beta range would have caused the loss of yaw control, then roll control of the aircraft.

Accident description
BEA Accident Report