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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Electric power systems VS. Nitro power systems
12-14-2011 09:01 PM  9 years ago
rilopez825

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Pembroke Pines, FL

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well newer flybarless systems and gov combos actually take care of this.
like the Vbar. when you give collective it startes to open the throttle before the head speed drops. This way when the blades start to load up the motor is already pushing out more power. same goes for cyclic movements. The Folks at Vstabi already did a great job with the factory settings. My head speed is constant throughout the whole flight.
Richard
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12-14-2011 09:47 PM  9 years ago
Band1086

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Kennewick, Wa. USA

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Well, I was impressed with the ability of the new high power E motors to hold 5000W for a full 15 or more sec @ 20,000 RPM. That's 6.7 HP for 15+ sec plus 10,000W(13.4HP) peaks, very impressive for such tiny little motors.

While this is what the motor uses, the particular motor I was looking at said 85% eff. So, approx 5.7HP at the shaft for 15+ sec and peaks of 11.4HP.....eat shyt nitro!

LOL, sorry N guys, I couldn't resist.
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12-14-2011 09:49 PM  9 years ago
CX1

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Canada

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LOL you e-guys are hilarious " Team Protoast "
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12-14-2011 10:05 PM  9 years ago
Terrabit

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Seattle, WA - USA

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Kontronik claims that the Pyro 700-45 is 91% efficient. I accounted for 20% inefficiency in my first post. I think that's probably not far off. The esc (Jive 120) adds a bit, as does the mechanical drivetrain. 20% is probably close.
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12-14-2011 10:34 PM  9 years ago
Rogman88

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West Monroe, LA

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I'm just glad that electric is so much better than nitro...because that's my power system of choice! Still have a couple of nitro planker motors to feebay and I'll be all set!

High Voltage just works better
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12-14-2011 11:41 PM  9 years ago
CX1

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Canada

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I'm just glad that electric is so much better than nitro...because that's my power system of choice!
Glad you feel that way
" Team Protoast "
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12-15-2011 02:34 AM  9 years ago
BobOD

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New York- USA

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The eff. is determined at some theoretical set of conditions...voltage applied, throttle %, RPM, load, phase angle. At other conditions, I think it is quite a bit lower. Like much less than half.
Also, talking peaks is not very meaningful. Depending on the width of the peak, the useful energy in that peak could be less than 1/2 of the peak level. Best way to determine how powerful a flight was is to take the MAH used, multiply by voltage and divide by time of the flight. That's a much better indication of how much power was consumed (agressiveness of flight). Then apply eff loss to get from consumed to output.

I've not measured it but this is the only way I could ever explain how my 3.4HP 91 kicks the snot out of my hk4035 which can draw several thousand watt peaks.

Now, I could get a bigger motor than the 4035 but don't really feel the need for more power....and the rate at which it can suck the pack dry. The 4035 does that plenty quick enough for me.
Team POP Secret
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12-15-2011 08:03 AM  9 years ago
Terrabit

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Seattle, WA - USA

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I ran a 4035-560kv in my vbar Logo 600. It was much more powerful on 10s than a 4035-500kv on 12s in the same bird. But everything ran much cooler on 12s.
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12-15-2011 03:58 PM  9 years ago
Band1086

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I love the smell of electric in the morning, or anytime for that matter, fresh clean air!

Some antagonizer will probably say "what if it smokes or flames, how do you like the smell then?" But I'll answer that now, I wouldn't know because I've never had it happen, not even sure I've ever seen it happen...but fresh clean air when I'm flying, no smoke to hang over everything and give that greasy feeling that make you want to shower after flying!LOL
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12-15-2011 04:16 PM  9 years ago
darkfa8

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Brick, NJ - USA

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you know your electric model is powerful when you start to smell ozone- Dan Goldstein
Team Revolectrix
Lynx Heli Innovations
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12-15-2011 04:30 PM  9 years ago
rexxigpilot

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darkfa8, you're right. The smell of ozone and the humming sound when underneath a high voltage primary transmission powerline is a scary, powerful thing to me. By comparison to electric power, nitro just sounds like a crybaby trying to get attention, it is just loud and annoying.

When I was a young boy, my dad and I were into pylon racing. Our engines would scream at nearly 30K rpm. This too was scary. You certainly would not want to get your fingers near that prop. However, even as a young boy, I was amazed by how easily this screaming banshee could be stopped by simply throwing a rag into the prop. Try that with any electric motor and see what happens!
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12-15-2011 04:37 PM  9 years ago
Band1086

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LOL

I still like fresh, clean air the best!
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12-15-2011 06:39 PM  9 years ago
BobOD

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New York- USA

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I like filthy decadence. Team POP Secret
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12-15-2011 06:56 PM  9 years ago
CX1

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Canada

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filthy decadence got to love that smell that only nitro can offer
" Team Protoast "
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12-15-2011 08:11 PM  9 years ago
Band1086

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Kennewick, Wa. USA

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No, no, no poisonous air, just clean fresh air!

And no smoke to get in the way of the heli when it's dancing right in front of you!
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12-15-2011 09:26 PM  9 years ago
fenderstrat

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Aston,Pa

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ok so cant somebody rig up a smoke machine with the same smell as nitro to put in an elec heli and it will be the best of both worldsCompass helis Support Team
PerformancePlusRC field rep
Mini Titan/SE
TEAM KBDD
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12-15-2011 09:30 PM  9 years ago
rilopez825

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Pembroke Pines, FL

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what electric heli's arent heavy enough already?Richard
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12-15-2011 11:20 PM  9 years ago
CX1

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Canada

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ok so cant somebody rig up a smoke machine with the same smell as nitro to put in an elec heli and it will be the best of both worlds
Great idea
just need to add a few minutes of flight time and Bob's your uncle
" Team Protoast "
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12-17-2011 05:14 PM  9 years ago
Band1086

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Kennewick, Wa. USA

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I noticed a certain motor manufacturer rating one of their E motors at 10HP continuously. It's big, and must have enough surface area to dissipate the heat. They are generally very conservative with their power ratings too, unlike some of the others. That kind of power continuously, with 20HP surges would need much stronger running gear than what we have today. It would be cool to get away from plastic(and the like) gears, and go with a more efficient much stronger system to drive the rotors......
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12-17-2011 07:19 PM  9 years ago
Terrabit

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Seattle, WA - USA

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what electric heli's arent heavy enough already?
My 700E weighs 10.5lbs. Some people running the CHP DL frameset have brought that down to just over 9lbs, all-up. Can you show me a 9lb nitro that spins 713mm mains? I've never heard of one.
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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Electric power systems VS. Nitro power systems
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