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by thedoctor
March 25th, 2012, 7:25 am
Forum: Helicopters C
Topic: Rotors
Replies: 126
Views: 19566

Re: Rotors

I tested two different helicopters with two different rotors. One was 8cm from one rotor stick to the other(width). The other was 9cm. I noticed with the 8cm, the top propeller would spin super fast and I felt like I could get longer times if it slowed down a bit. However, with the 9cm one, the pro...
by thedoctor
March 11th, 2012, 7:29 pm
Forum: Helicopters C
Topic: Designs
Replies: 127
Views: 20236

Re: Designs

Has anyone made a working chinook style helicopter yet? I just made one that flew for 1 minute and 43 seconds (I'm quite proud of myself). That score is multiplied by three right? So my actual score should be somewhere around a normal helicopter that flies for about 5 minutes... If this is true, th...
by thedoctor
March 4th, 2012, 7:15 pm
Forum: Helicopters C
Topic: Rubber
Replies: 30
Views: 6666

Re: Rubber

Still no improved performance on 1/8th rubber :evil: I have two helicopters, one with 2cm vertical spacing and 6cm tip to tip and another with 2cm vertical spacing and 8 cm tip to tip. Both produce times 10-15 seconds. I've tried 2.0g (with 1200 turns), 1.5g (800 turns), and 1.3g (600 turns) of rub...
by thedoctor
March 1st, 2012, 7:10 pm
Forum: Helicopters C
Topic: Designs
Replies: 127
Views: 20236

Re: Designs

I know we're being really off topic now haha but I'm really curious what Elastic Launch Glider looks like. I read the trial rules and I can't really visualize it. (But of course if you want to get back on topic to Helicopters I completely understand lol)
by thedoctor
February 29th, 2012, 7:45 pm
Forum: Helicopters C
Topic: Designs
Replies: 127
Views: 20236

Re: Designs

Hm, was BLG (Balloon-Launch Glider) or some other gliding event ever in Division C? In that case maybe they'll bring that back...
BLG was a Division B event I believe...
by thedoctor
February 27th, 2012, 3:05 pm
Forum: Helicopters C
Topic: Helicopter Testing
Replies: 98
Views: 16976

Re: Helicopter Testing

Hi everyone, for states I'm looking to being able to test my helicopter in a more scientific manner than before, especially for torque. I know there are a lot of plans on the internet to build your own torque meter, but I have REALLY minimal building know-how and tools. Does anyone know of any place...
by thedoctor
February 23rd, 2012, 7:26 pm
Forum: Helicopters C
Topic: Rotors
Replies: 126
Views: 19566

Re: Rotors

Thanks, and another thing. I believe this was brought up in last year's thread, but never received an answer- Is there a way to mount the "fixed" rotor onto the motor stick temporarily so that you can swap it out for a rotor with a different pitch during testing? I was thinking about maybe creating...
by thedoctor
February 22nd, 2012, 8:11 pm
Forum: Helicopters C
Topic: Rotors
Replies: 126
Views: 19566

Re: Rotors

To cut my ribs so that they lie flush between the rotors, I normally just take a piece bigger than the rib size i will actually need (bigger in length) and let the ends overlap the spars. I then take one of those nice straight edge (long chisel) blades and line it up flush with the lower spar. Then,...
by thedoctor
February 12th, 2012, 5:20 pm
Forum: Helicopters C
Topic: Rotors
Replies: 126
Views: 19566

Re: Rotors

Would having rotors at the top of the copter cause a higher or lower center of gravity?
Well...most people have two rotors--one on top and one on bottom so that you have more lift. By the way I see you're from NC; what regionals are you in?
by thedoctor
February 12th, 2012, 9:46 am
Forum: Helicopters C
Topic: Rotors
Replies: 126
Views: 19566

Re: Rotors

Oh no, it is 2:27. I just tested another one however (still with non-helical rotors) but it had cured rotors and it got a time of 2:49. You sure you aren't trolling? :shock: There has to be some sort of miscommunication between thsom and everyone else...didn't Mr. Anderson build a non-helical helic...

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