Prop Pitch Hurricane

[spartan18a]

Hello, I would like some instructions of the management of the two stage propeller pitch in the Hurricane.
When do I have to have it in FINE and when in COARSE? Landings, climbing, diving, cruising, landing?
Thanks

[ATAG_Slipstream]

This is taken from the Team Fusion wiki located here (http://www.theairtacticalassaultgroup.com/wiki/doku.php?id=flight_manuals)



PROPELLOR

Aircraft has a De-Havilland Two Speed Propellor, maximum rpms are not restricted by the propellor governor. Pilots will need to watch their engine rpms to avoid over-revving their engine or Propellor governor. Pilots should use their throttle to keep rpms to a maximum of 3000 rpm. A “Do not Exceed” limit of 3200 rpm is in effect for dives. Exceeding this engine speed will very likely result in the destruction of the engine.

The two settings available are either 'Fine Pitch' or 'Coarse Pitch'.

Pilots will notice that in both Coarse and Fine Pitch rpms rise as altitude is gained, this is a natural result of how these aircraft's propeller settings were tuned. Maximum rpms in Coarse Pitch were designed to arrive at approximately Full Throttle Height, (+6 boost) to allow maximum speeds at those altitudes to be attained. For this reason, rpms and performance at lower levels are less than desirable. This is one of the compromises of a simple two pitch propeller system.

FINE PITCH

Fine pitch is only intended for use in takeoff and landing, and below 2,000ft, and only in climbs and slow speed maneuver at or below that altitude. Any attempt to use Fine Pitch at higher altitudes or in dives or in higher speed situations will result in excessive engine and governor rpms and the destruction of the engine.

COARSE PITCH

Coarse pitch is intended to be used for most situations, including Climb, Dive, Level Flight and Combat Maneuver. Pilots will need to watch their rpms, although the potential for over-revving the engine or prop governor is not as high as the rpms are more controllable.

PITCH CHANGE RATE AND USING THE PITCH CONTROL LEVER TO SIMULATE A VARIABLE PITCH SYSTEM

Pitch change rates Coarse to Fine and vice versa have been revised to documented historical speeds.
Pitch change from Coarse to Fine or vice versa takes 10 seconds.
Pilots may use this slower pitch change mechanism in the same way as the real RAF pilots did, as a means to mimic a variable pitch system and gain a bit of acceleration when Coarse Pitch rpms are very low. When the prop is in Coarse Pitch and the rpms are low, the pilot can engage the lever to change to Fine Pitch. The rpms will then rise as the blade angles change giving more bite to the prop and a brief burst of acceleration. Before the rpms reach 3000 and the engine over-revs, the Pilot should change the lever position back to Coarse Pitch, so that the Prop pitch reverses, and the engine goes back to lower RPM's. This technique is only recommended for use between 0- 10,000ft, or when at altitudes over 20,000ft. Extreme caution should be used to avoid over-revving the engine.

[spartan18a]

Thanks. It's perfect. [emoji7]

[KeefyBoy]

http://i71.photobucket.com/albums/i121/obergren/CARLESS%20TORQUE%20COSTS%20LIVES.jpg (http://s71.photobucket.com/user/obergren/media/CARLESS%20TORQUE%20COSTS%20LIVES.jpg.html)

[Hurricane]

Hahahahahahaha, oooer matron. :D

Best regards, :salute:
Mike.