Ok is this some rule that I am unaware of? I was taught to prerotate on the taxiway and keep my blades up with my skill. I noticed this practice of pulling on the dnd of the runway and then prerotating it causes delays and in my opinion could be dangerous. I would equate it to someone doing a mag check on the numbers in a fixed wing. I was always taught to taxi with blades turning and have them almost up to speed when turning on to the active so I just needed to push the throttle bring the blades up a few RPM’s and my nose wheel would come up and full power and off. This limited my time on the active as to not piss off the traffic or cause a dangerous situation.
I teach the procedures in the pilot's operating handbook for the aircraft I am training in.
M24C_FLIGHT_MANUAL_ISSUE-B_AUSTRALIA.pdf
From the M24C_AUS M24C FLIGHT MANUAL (Australian Pilots Operating Handbook)
4.10 ROTOR PREROTATION (Fig. 24) CAUTION: Keep the control stick fully forward until reaching 130 r.p.m. rotor speed.
1 - ALIGNMENT - runway alignment
2 - ENGINE SPEED - set at 1.800 r.p.m. CAUTION: A lower or higher engine speed may worsen the prerotation procedure performances.
3 - PREROTATION ENGAGING - gently operate the prerotation lever
(1). Keep engine speed at 1.800 r.p.m. CAUTION: The prerotation must be engaged in a gentle manner, without sudden movements of the lever (1), so as not to stress the system and avoid stopping the engine. At 130 r.p.m. ROTOR
4 - CONTROL STICK - Place the control stick (2) in takeoff position (rear limit stop).
5 - PREROTATION LEVER - Gently reach the limit stop while keeping a constant engine speed. WARNING DANGER: In windy conditions, or if the payload is light, it is possible that the gyroplane will lift up onto the tail wheel. If this occurs, the prerotation should be released and the stick moved forward to balance the gyroplane on the main wheels, some engine power should be applied to prevent the gyroplane from moving backward. The rotor rpm will continue to increase. When the rotor speed is equal or greater to 200 rpm, proceed as for take off. This should be practiced with an instructor before proceeding in these conditions AT LIMIT STOP OF PREROTATION LEVER
6 - ENGINE r.p.m. - Gently increase the engine speed until reaching 200 r.p.m. of the rotor. (standard prerotation). WARNING DANGER: The minimum rotor prerotation speed is 150 r.p.m. It is strictly forbidden to proceed with takeoff operations if the rotor r.p.m. is lower than the minimum value. NOTE: Under identical conditions, the length of the takeoff run depends on the rotor r.p.m. reached during prerotation. The maximum speed of the prerotation system is 280 r.p.m. The life of the prerotation system and its inspection frequency depend on the average rotor r.p.m. applied during the prerotation operation.
M24C_AUS M24C FLIGHT MANUAL . PAGE ISSUE B 70 December 2011 WARNING DANGER: it is not possible to reach the minimum rotor r.p.m. during prerotation, stop the operation and return to the parking area.
7 - BRAKES - release.
8 - RELEASE PREROTATION LEVER - once the rotor turns at 200 r.p.m., quickly release the prerotation lever.
WARNING DANGER: It is strictly forbidden to operate the prerotation lever (1) other than during the prerotation procedure.