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HomeAircraftHelicopterHelicopter Main Discussion › Cold and high altitude electric power (no power)
12-11-2017 04:05 PM  10 months agoPost 21
Heli_Splatter

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USA

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My power loss was... the ESC burned up. Don't think that was perceived.

I had hundreds of flights on that bird at sea level. I am not saying you can't fly, it is just that I had the wrong setup. Needing more collective, heli drew a lot more power. Colder air would have helped, day was in 50s as I remember the day... no snow.

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12-11-2017 04:56 PM  10 months agoPost 22
Dyehard

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Cedar Bluff, Va.

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Co rotorhead, that parking lot is actually at 14,130 feet. As for how thin the air is, I've been there on one of my motorcycle trips. I stayed dizzy the whole time I was up there and another motorcyclist that came into the parking lot while the wife and I were getting off our bike just fell over as he was coming to a stop, laughin style. I'm quite sure it affects a nitro heli quite a bit, both the power of the engine and the lift of the blades. We went to the top of Mt. Evens the next day, there the dizziness was worse as the altitude was higher.

Allen Dye

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12-11-2017 06:24 PM  10 months agoPost 23
Ladymagic

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South Korea

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My power loss was... the ESC burned up. Don't think that was perceived.
Yeah, popping an ESC is definitely the culprit in your case

....but, my post was actually intended to address the OP's original post.

Mellisa

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12-21-2017 03:36 PM  10 months agoPost 24
eyeflyhelis

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charlotte nc

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Increasing throws may not be helpful. +/-12 8-9 on cyclic. Normal operation Full pitch + direction =18-21 degrees of pitch. Larger cyclic throws = larger full pitch outputs which = more bogging down output/ performance.
Headspeed would be the most logical way to go for better performance. Better have good cf blades at higher rpms. Ive seen the cheap china blades come apart at high rotor speed.

only you have the power to make no difference!

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12-21-2017 03:52 PM  10 months agoPost 25
MattJen

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UK

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high altitude flying does bring its challenges,

when a friend of mine was doing aerial work for filming Top Gear in Italy high up in the mountains, he couldn't up the head speed as he was flying with 950 blades on a Predator Turbine, it was the disc loading in the thin air that presented the problem, the only way round that was bigger blades, but then you have to alter the boom etc, he tried it, got lift at the start but as he flew round off the mountain with a heavy camera ( pre DJI and drones) it just started sinking despite full pitch etc max throws, until it fell at the bottom of the mountain..

I had never come across this phenomenon before as I was new to heavy helicopters where power to weight ratio was critical, having flown nitro like Xcell the power to weight ratio was never a problem..

Matt

All The Best

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12-21-2017 04:04 PM  10 months agoPost 26
eyeflyhelis

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charlotte nc

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Best option would be wider blades but since thats not realistic increasing blades such as 3 or 4 blade set up might work.

only you have the power to make no difference!

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HomeAircraftHelicopterHelicopter Main Discussion › Cold and high altitude electric power (no power)
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