Duration

yujamesyu
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Duration

Postby yujamesyu » December 18th, 2010, 9:23 am

How long does your helicopter last?
My helicopter isn't that great and only last for 10 seconds...

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illusionist
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Re: Duration

Postby illusionist » December 18th, 2010, 10:23 am

I'm getting in the 1:15 range, still need improvement. Something I strongly suggest is to lower the weight of your helicopter. A lighter helicopter will fly much longer.
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sj
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Re: Duration

Postby sj » December 18th, 2010, 10:51 am

We've gotten 1:32. We still have to increase the span of the rotors and increase the mass of our rubber.
2011 Nationals Results : Sumo Bots 2nd, Helicopters 4rd, Mission Possible 4th, Towers, 9th
WWP SOUTH 3rd At NATS!!!!!

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lllazar
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Re: Duration

Postby lllazar » December 22nd, 2010, 5:03 pm

Nice Sj!

I was wondering, what would top 5 at state be in a competitive state...
2011 Season Events~

Fossils (Regionals ~1st) (State ~6th)
Towers (Regionals ~1st) (State ~3rd)
Helicopter (Regionals -3rd gahhh) (State ~5th)
Wind Power (Regionals ~1st) (State ~3rd TIERED!)

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sj
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Re: Duration

Postby sj » December 22nd, 2010, 6:06 pm

Im guessing it would upwards of two minutes...
2011 Nationals Results : Sumo Bots 2nd, Helicopters 4rd, Mission Possible 4th, Towers, 9th
WWP SOUTH 3rd At NATS!!!!!

2012 Events: Robot Arm, Towers, Gravity Vehicle

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lonestar
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Re: Duration

Postby lonestar » December 24th, 2010, 4:47 pm

I'm having trouble getting mine to fly at all :(
It's 4.7 g, 3/32" motor, 900 winds, just drops to the ground.
Will getting the weight down to 4.1 make it the difference I need, or do you think there could be some design problems as well?

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lllazar
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Re: Duration

Postby lllazar » December 24th, 2010, 4:53 pm

Get the weight down, asap, and come back if it still isn't flying....
2011 Season Events~

Fossils (Regionals ~1st) (State ~6th)
Towers (Regionals ~1st) (State ~3rd)
Helicopter (Regionals -3rd gahhh) (State ~5th)
Wind Power (Regionals ~1st) (State ~3rd TIERED!)

Hooray for getting everything i wanted?

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blue cobra
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Re: Duration

Postby blue cobra » December 24th, 2010, 6:07 pm

Get down to 4 grams, but even at 4 grams I don't think 900 winds on 3/32" will be enough for most helicopters. I used 1/8" rubber and could probably get to 900 without winding too hard. You should be able to easily get upwards of 1500 winds on that rubber. That's what I could get on ~3/32 with 1.5g, so with 2.0g you should be able to get even more. Lube with some Armor-All or something, and wind harder.
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lonestar
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Re: Duration

Postby lonestar » December 24th, 2010, 8:07 pm

And with more winds the torque will increase significantly? I was guessing that it'd only benefit how long it spins. Alright, I'll break a motor, see how much it can handle, and start working on another helicopter.

Edit: Ok, I broke at 1590 on a new lubed motor. I also freaked out for a couple seconds when the hook on my winder suddenly extended during winding. I didn't know it could do that haha.

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Nerdllama
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Re: Duration

Postby Nerdllama » January 9th, 2011, 8:28 am

My helicopter can pretty consistently get over 1:30 with 50 winds on a 15:1 winder (750 total), and my record is 1:52.08.

The helicopter is 4 grams, and the two rotors are 40cm wide each. The rubber I use is 1/8'' thick and I usually use over 1.7 grams of it. At 50 winds, it gets to the point where it is literally a battle to get even one more turn on the handle, so we usually stop there out of fear of it snapping. How can I get more winds on it, since you guys seem to be getting 150+ more winds than I can? I do stretch out the rubber and lubricate it; what else is there to be done?
2011 regionals- 2nd solar system 7th helicopters 2nd overall; states- 5th solar system 5th helicopters 8th experimental design (ugh) 4th overall


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