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HomeAircraftHelicopterHelicopter Main Discussion › Auto Pitch Curve
04-27-2010 01:02 AM  8 years agoPost 1
Nycatt

rrElite Veteran

New York

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Should I run -6 +13 for Autos? If I leave it at -13 +13 I might drop too fast.




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04-27-2010 01:08 AM  8 years agoPost 2
Yug

rrMaster

UK. Herts

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I've allways used the same pitch range in all modes - don't need to think about it so the thumbs just know what to do.

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04-27-2010 01:11 AM  8 years agoPost 3
z11355

rrMaster

New England

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if you just blindly pull the stick all the way down, yea, it'll drop pretty fast

so don't do that.

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04-27-2010 02:00 AM  8 years agoPost 4
greenboot

rrVeteran

Marblehead, OH

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In a situation where you are losing power, you may want to start an autorotation without hitting the throttle hold. Even if the engine quits, there is no need to use hold. That's why I keep the same pitch curve for all modes. The only time you need the hold switch is if the tail rotor fails or you just want to practice an auto.

Tom

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04-27-2010 08:33 AM  8 years agoPost 5
Sillyness

rrVeteran

Little Rock AR

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The good Lord found it prudent to bequeath you with a left thumb and proclaimed that thou shalt use it!

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04-27-2010 08:38 AM  8 years agoPost 6
Sillyness

rrVeteran

Little Rock AR

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And BTW... at -6 degrees it'll probably still fall to fast... I estimate that I only use a little... -2 to -3 degrees... in autos.

When I DO use more negative it is usually a low altitude high speed auto... when I pitch up hard at a couple feet to bleed off forward speed I drop the collective more to prevent a climb and help keep up blade energy... as speed bleeds off I end up slowly increaseing the pitch and pushing the nose back over, or aileron... what-ever... been doing 1/4-1/2 piros after the pitch-up... looks cooler and prevents the tail from dragging. On some of my more violent ones where I've been keeping full speed until right in front of me and slammign to a stop to hit a spot landing I estimate I am sometimes almost going -9 to -10 in the initial hard flare... kind of spectacular and loud... not exactly sure on the pitch though... in the end it is all feel, not mechanical thumb settings.

Hope this helps a little

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04-27-2010 11:37 AM  8 years agoPost 7
ch-47c

rrElite Veteran

san jose, ca

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When I was learning autos, I practiced in Normal Mode with -4/+11 or whatever I could get at the top end of the curve. I matched my Throttle Hold curve so it wouldn't bump whenever I switched. The -4 or -3 like Sillyness uses sets the heli into a nice descent so you can get accustomed to what an auto feels like while it pinwheels down. After you're comfortable, do it with -13/+13 or whatever your setup is in Idle-up 1/2 and you just start autoing from wherever your collective is. -6 degrees will drop like a manhole cover.

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