Pulling the prop through on the Vedeneyev M14P 9 cylinder radial to ensure that no oil has collected overnight which would cause an hydraulic lock on starting the engine. Rob Fry does the honours for Svetlana in Rob's SU-29.
Principal Features of this 360 + BHP radial engine include:
Very well proven - the basic M14P engine powers several thousand aircraft throughout the world.
Extremely rugged - versions of this engine power generating sets and are expected to run 20,000 hours at 70 percent before overhaul.
Supercharged for optimum performance, even at higher altitudes, as well as for better mixture distribution.
Geared, giving higher effective power from the slow-turning propeller with the additional advantage of less propeller noise.
Designed from the outset as being aerobatic, with fully inverted carburetor and integral inverted oil system with dry sump and scavenge pumps, giving perfect oil pressure in any attitude.
Beautifully engineered in the highest quality materials, with such items as roller rocker arms.
Built-in air starting system.
Fully automatic altitude and mixture-compensating carburetor.
Latest strengthened propeller flange will take Western propellers without adapters and the propeller governor comes adjusted for the three-blade MTV-9 propeller.
The makers claim that it has "probably the best engine sound in aviation".
All spares and support are readily available. Information Courtesy http://www.snaproll-sukhoi.com/suengine.htm