Thanks Rusty and Finn,
glad to hear that they don’t tend to windmill … I have the 2.85
drive.
Can’t say I understand
why they don’t, as the relative force to turn over the Rotary is significantly
less than a Lycoming or any other auto conversion.
The Lycoming won’t
windmill either, but they can be air-started in a
dive.
Jeff (hoping to never
experience either)
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Russell Duffy
Sent: Wednesday, November 29, 2006 8:29
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: EAA 782
meeting
One concern I have is
if the engine fails there is nothing in the design of any gear box and a Rotary
engine to stop or reduce propeller wind milling.
Has anyone experienced
an engine out and have any testimonies as to what happens?
I think it's pretty well
established that there will be no windmilling at any reasonable speed. I
can personally confirm that the 2.85 drive will not windmill up to 110-120
kts or so. I still have a perfectly clear mental image of the prop sitting
at 10:00-4:00 position :-0
The 2.17 drive would be
more likely, but I think it's been reported that it won't windmill
either. If anything, that may be a plus for
PSRU's.
Rusty (mentally working
on the single rotor gyrocopter)
2.176:1 will definitely not windmill at pattern or glide
speed for an RV-3 (about 100 mph). Might make a 1/3 turn and stop again if you
point it down a bit. And that was with an engine that had rather low
compression.
Tested several times over Clearwater
Airpark.
Finn
__________ NOD32 1892 (20061130) Information
__________
This message was checked by NOD32 antivirus system.
http://www.eset.com