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Old Jan 06, 2013, 06:42 PM
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budkeywest's Avatar
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Autogyro Crash Video

I think it stalled.....

RC Autogyro Gyrocopter Crash (3 min 46 sec)
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Old Jan 06, 2013, 07:09 PM
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Orlando, Florida
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But he pulled off a great landing later!!!

RC Autogyro with a Great Landing! (0 min 44 sec)
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Old Jan 07, 2013, 06:07 PM
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Stalling would imply a high angle of attack. I think in this case it is a low angle of attack that is the problem, which resulted in no air flow driving the rotor blades.
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Old Jan 07, 2013, 06:19 PM
4.2V of pure Kraut power
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Well, one contributing factor was surely the Statler and Waldorf talking...
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Old Jan 17, 2013, 06:37 PM
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Tom Wright's Avatar
United Kingdom, Ollerton
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Could it be the pre rotator was still engaged ? the blades stopped rotating ,or slowed far to quickly and it was hard to work out whether the steep roll to the right was a contributory factor or part of the problem . As LG said it was not a stall , as in effect autogyros don't stall . If it was a maiden then was there two much roll thro or , was the following rate just to high ? The other thing was the tx was it a dx5 ? !

Tom.
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Old Jan 17, 2013, 07:04 PM
Sky's not the limit, ground is
skydanz's Avatar
USA, CA, San Jose
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Quote:
Originally Posted by Tom Wright View Post
Could it be the pre rotator was still engaged ?
Tom.
I'm positive the pre-rotator wasn't engaged. I have seen this happen to me many times before. The cranial digit connection was lost.
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Old Jan 18, 2013, 02:40 AM
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Elizabeth South Australia 5113
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..................Cranial Digit....Eh.....must remember that one..........
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Old Jan 18, 2013, 08:01 AM
Sky's not the limit, ground is
skydanz's Avatar
USA, CA, San Jose
Joined Dec 2007
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Yeah, or possibly a synapsis synapped.
Oh, BTW Chris, sorry about your fantrainer. Is it bad?

D
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Old Jan 18, 2013, 11:48 AM
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Quote:
Originally Posted by skydanz View Post
I'm positive the pre-rotator wasn't engaged. I have seen this happen to me many times before. The cranial digit connection was lost.
Had a look at the video again , and it looks like an over control of a left turn , with no back stick applied . This is a great model , the take off and climb was spot on so it seems reducing roll sensitivity / control movement may help, along with less on looker encouragement lol..

Tom.
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Old Jan 18, 2013, 12:51 PM
It was a GLITCH! Honestly!
SafeLandings's Avatar
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Hmmmm....I have done that myself many many times and it happens sooooo quickly! to me it is a classic case of disorientation. Just a simple case of roll correction in the wrong direction, as the nose dropped the blades slow down and instinct is to pull back. Much the same if you have been unlucky enough for your wings to fold on a fixed wing in flight...you still pull up but there is virtually no lift

But those PT profiles are a tough old cookie


Regards

Rich
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Old Jan 18, 2013, 01:34 PM
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Tom Wright's Avatar
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Rich
If you look at the video in slow mo ,the model rolls left , followed by a rapid over banked roll to the right , as the pilot was directly behind line of flight . I would have thought disorientation was unlikely ? unless the model had turned a 360 unoticed.

Tom.
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Old Jan 18, 2013, 02:27 PM
Go Dawgs!!!!!!!
David Hogue's Avatar
USA, NC, Clayton
Joined Feb 2001
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I agree with Rich, look like the pilot got disoriented, the gyro was coming back toward the pilot at that point. I have a PT and have had the exact same crash more than once
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Old Jan 18, 2013, 03:10 PM
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Can't say I am entirely convinced chaps. but to be fair the pilot seems to put it down to some sort of control input error . I fly autogyros most days and have not had that problem as my machines don't tend to fall out of the sky ( well not for me) while correcting a duff input .
The roll rate did look to be "fast following" which can't of helped things, on the other hand if the rotors slowed below auto rotation before the terminal attitude,the question would be why?
Could the rotor pitch trim have been to low and forward stick input put the rotor angle into low rpm or a divergent situation? which in turn may have been due to a low or zero blade incidence set as the model had a pre rotator. As long as the pilot knows what went wrong then that's ok.

Tom.
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Old Jan 18, 2013, 07:01 PM
Sky's not the limit, ground is
skydanz's Avatar
USA, CA, San Jose
Joined Dec 2007
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Sorry Tom. No pre-rotator on that puppy. Just wind. Even the video shows how easy disorientation can happen. Like the guys said, I've had it happen to me more than I'd like to admit. You are one lucky dude if you've never lost orientation. It's a sick feeling.
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Old Jan 19, 2013, 12:44 PM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
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To be fair we could all be correct, at the end of the day there is only one person who will ever know what happened and that is the Gent behind the sticks.
Always good to see peoples ideas though as it will prepare others for possible issues that we as autogyro pilots are well aware of.

Our pain is their Gain!


Regards

Rich
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