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01-04-2014, 11:24 AM | #1 (permalink) |
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Join Date: Jan 2013
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550 accident
Just received this e-mail, thought I'd share. I always fly in idle up & end with throttle cut, so not really sure the exact scenario or experience of the pilot, but perhaps i will only fly my smaller heli's when I'm on my own.
Gentelmen, On December 26th one of our pilots here in Zone C was attempting to land his 550 size electric helicopter when it entered into an idle up condition (full throttle). He was struck by the helicopter. He has severe bruising up his side and shoulders and serious damage to his right hand. His small finger had to be removed and a portion of his index finger reattached. Other pilots were quick to assist. The pilot is at home healing. This was a very unfortunate accident. I have spoken to the pilot and to those who assisted him. The pilot has a great attitude and is in good spirit. The gentlemen who provided the assistance are both life time R/C'ers. They were both reiterating the importance of safety and strongly discourage any R/C pilot to fly alone! If anyone has any concerns feel free to contact me directly. Thanks Fly safe Steve
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Chase 360, Protos380x3, Goblin500, Raptor E700 x2 JETI DS-16, SKOOKUM & YGE |
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01-04-2014, 10:14 PM | #2 (permalink) |
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Join Date: Sep 2013
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550 is already a little beast, too powerfull. Hope he is getting better.
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01-06-2014, 12:55 PM | #3 (permalink) |
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Join Date: Aug 2010
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Re: 550 accident
How exactly can this happen? Wrong switch? Very vague. Couldn't the heli be controlled anymore to steer away? Landing too close?
Hope the pilot gets well soon
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01-06-2014, 01:14 PM | #4 (permalink) |
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Join Date: Jul 2010
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Re: 550 accident
I believe when someone has an accident, the more details the better. Then the community and individuals may be able to prevent another similar accident.
He must have been really close. I see videos all the time of people OnLy a few steps back when landing and taking off. I'm at least 25 feet. sent from a non Apple device
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01-06-2014, 05:47 PM | #5 (permalink) |
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Join Date: Jan 2013
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I would seem to me landing too close & accidentally hitting IU. I will try getting more details, & update if I do.
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Chase 360, Protos380x3, Goblin500, Raptor E700 x2 JETI DS-16, SKOOKUM & YGE |
01-06-2014, 06:38 PM | #6 (permalink) |
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Join Date: Apr 2011
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Sounds like it. Pilot was flying too close and lost control, hit himself before he had a chance to correct (or crash).
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01-06-2014, 06:56 PM | #7 (permalink) |
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x2, sounds as though he was way too close. Should always be enough distance to put the heli in before coming in contact with the pilot.
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01-07-2014, 06:18 PM | #8 (permalink) |
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Join Date: Apr 2013
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Doesn't everyone land in idle up? I have normal mode (never use it for anything but setup really, it's more of a redundant throttle hold for me), IU1 (3 head speeds selected with another switch) and IU2 (high rpm 3D mode). When starting, quick hover check and landing, the heli is always in IU1 lowest head speed so I'm almost at full pitch to hover. I also try not to have the tail pointing right at me in case the tail blades eject or the tail fin gets stuck in the ground sending the heli into backwards flipping chicken dance right into my soft entrails and face.
Then again, accidents happen. If you accidentally bump it into hight rpm mode and the tail spins around because of the sudden torque change, it's easy to get disoriented and panic. Always keep a finger on throttle hold and be ready to slam the collective and put the heli into the ground. Losing a finger is terrible and having a heli come right at you must be terrifying. Hope the pilot gets well soon and is a thumbed so the scarred index and missing little finger isn't keeping him from flying.
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01-07-2014, 07:00 PM | #9 (permalink) |
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Join Date: Jul 2010
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Re: 550 accident
I always take off and land in normal mode. 12 degrees positive, 6 degrees negative and 0-100 throttle curve.
For me at least, it just seems right. As I'm coming in, I flip the switch, the headspeed drops and it floats in for a nice easy landing. It is a horrible thing. And yes must have been disorienting. May I ask how far away everyone is from their landing pad? I guessed 25 feet but it may be even further. As soon as the snow melts and I can get back out there and will re Guage. sent from a non Apple device
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01-07-2014, 08:21 PM | #10 (permalink) |
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25 feet sounds about right. We have 4' fences we're suppose to stand behind and the runway is about 25' away.
The pic taken from our clubs web site gives an idea of the distance.
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Align 800 PRO DFC w/CGY750 / Align 700L Dominator w/CGY750 / 74" EF Slick 580 EXP / Futaba 18SZ / RealFlight 7.5 |
01-07-2014, 10:12 PM | #11 (permalink) |
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Join Date: Jan 2013
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Guess I better step back some, I think I'm more like 10-15ft for take off & landing
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01-07-2014, 10:19 PM | #12 (permalink) |
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I think our club is built to MAAC specs.......I think
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01-11-2014, 09:38 PM | #13 (permalink) |
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Very interesting accident. Not many possibilities. One maybe he tried to land to close and simply lost it. Flipping idle one or two when landing would not cause any issues. In that case he may have freaked and made a mistake on his inputs.
Other option to me maybe he landed and had it already turned off while walking back to it and accidentally turned off throttle hold. If auto bail out is setup it might have spooled up on him fast. Hopefully does not happen often but yes can happen if the pilot does not pay attention. |
01-12-2014, 04:24 PM | #14 (permalink) |
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Join Date: Apr 2011
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Unless he is one of those who follow various helis manuals and have different pitch curves for normal and idle modes. The sudden, unexpected jump in pitch would throw many off, add that to being too close and not a very good pilot and you could easily get this.
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01-12-2014, 05:16 PM | #15 (permalink) |
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Nothing wrong with different pitch curves but I agree. Some manuals show normal pitch curve like old school more related to scale flying and center stick different than the idle modes. Mine in normal uses less negative but still 50% like the rest on mid stick.
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01-12-2014, 05:18 PM | #16 (permalink) |
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Yes I would guess he had different pitch curves, that would make sense...
I asked for further details but have not got a reply yet.
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Chase 360, Protos380x3, Goblin500, Raptor E700 x2 JETI DS-16, SKOOKUM & YGE |
01-13-2014, 06:33 AM | #17 (permalink) |
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In case of manufacturer manuals I would either leave the pitch and throttle curves out of the manual or make a note that the one setting is related to scale while the others are more related to aerobatic flying.
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01-15-2014, 04:56 PM | #18 (permalink) |
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A simple warning that switching from normal to idle up will result in a sudden climb would be sufficient, along with the advise that all curves should be set up the same (like the idle ones) if you dont want this.
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01-18-2014, 03:11 AM | #19 (permalink) |
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Of all the manuals I've read, no matter how different pitch curves are suggested for different flight modes they vary only on the negative pitch portion. Unless you're doing show-off style auto-landing in which case you'll be on throttle hold anyways, you'll almost always be in the positive pitch range during landing so I don't see flipping between flight modes while landing will result in any sudden pitch jump. Now of course I've seen people setting positive pitch at mid-stick despite what manuals suggest otherwise. I can't count how many times I've explained that this will result in sudden pitch jump when switching flight modes.
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01-19-2014, 12:53 PM | #20 (permalink) |
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Re: 550 accident
I. And anyone at our field have normal - idle 1 and 2 all 3d curves. Everything linear and everybody lands with thr hold. No pitch change when going to another rpm.
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-TT E700 V2-vbar-mks950-980-Kosmik 160HV-Pyro 700 rewound by PD / Voodoo 600 -PD-MX700-470kv--BLS255hv-VBAR 5.3+- Gaui X3+Spirit Pro |
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