Rubber

[bobbityllama]

Where is a good place to buy rubber motor?

[chia]

I bought some armor-all yesterday at homedepot
to apply it, i spray it in a bag and put the rubber motor inside?
do i do this right before using rubberband?
or do i do it prior?
does it need to dry off?
this is my firstyear doing this, and my regionals is in two weeks, so i'm not sure how to use it
thankss

Just squirt it into a bag (a generous amount is fine), put in your rubber motor(s) before you've used them, move them around a little to make sure they're all covered, take the motor(s) out, and use them immediately! Take off the excess armor-all so that it isn't dripping, but it needs to be wet so that it doesn't stick to itself or break while the copter is in flight.


for bobbityllama:

The only type of good contest rubber (highest energy storage, ie longest flights) is FAI Model Supply http://www.faimodelsupply.com You can buy it other places, but might as well go to the source.

Not really sure on rubber size, might want both 3/32 and 1/8 wide to see which works best. Use a piece long enough to weigh 2 grams.

Jeff Anderson
Livonia, MI

[gabuilder]

Hey,

Is it alright if the motorstick is quite a bit shorter than the rubber? My motor stick is about 8 inches, and my rubber about 10-11.

Also, my helicopter flies quite weirdly: it ascends quite quickly to about 30-40 feet but then falls fairly quickly, leaving a lot of winds left. Tips?

Thanks!

[donlayola]

I was wondering whether or not anyone has an table of the weight of tan super sport rubber with each thickness, or how long a 2g motor of each thickness is.
Thanks very much.
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[chia]

Is it alright if the motorstick is quite a bit shorter than the rubber? My motor stick is about 8 inches, and my rubber about 10-11

I think I've seen it done, but I don't know if it works that well. I would think that much longer is a little too much, though...? Wouldn't it be sort of a waste of winds? (Also, 8 inches is pretty short for a motor stick.)

Also, my helicopter flies quite weirdly: it ascends quite quickly to about 30-40 feet but then falls fairly quickly, leaving a lot of winds left. Tips?

My old one did the same thing... I know there were a lot of problems with it - rotors not on the same axis and too close to each other, rubber too thin, bad pitch, etc - but I'm still not entirely sure which was was the reason for that particular problem. I'm thinking it would be not the correct combination of rotor pitch and rubber.

[Draylon Fogg]

Hey,

Is it alright if the motorstick is quite a bit shorter than the rubber? My motor stick is about 8 inches, and my rubber about 10-11.

Also, my helicopter flies quite weirdly: it ascends quite quickly to about 30-40 feet but then falls fairly quickly, leaving a lot of winds left. Tips?

Thanks!

that usually means you have too much torque, when your winding try overwinding by about 5 turns of the spinner, then back off 5, that lets the un-needed torque off, usually allowing longer flight times. if that doesn't work your pitch on the blades may be too steep.

[donlayola]

Hey,

Is it alright if the motorstick is quite a bit shorter than the rubber? My motor stick is about 8 inches, and my rubber about 10-11.

Also, my helicopter flies quite weirdly: it ascends quite quickly to about 30-40 feet but then falls fairly quickly, leaving a lot of winds left. Tips?

Thanks!

that usually means you have too much torque, when your winding try overwinding by about 5 turns of the spinner, then back off 5, that lets the un-needed torque off, usually allowing longer flight times. if that doesn't work your pitch on the blades may be too steep.

Are you sure you should do that when there are a lot of winds left
Do't you want more torque so that not many winds are left
Just wondering, and thanks.

[Draylon Fogg]

more torque doesn't always mean less winds left.

[Frogger4907]

more torque doesn't always mean less winds left.

But it does!
If you have 2 pieces of rubber, rubber a, and b. Now rubber "a" has 200 units of torque, with 500 winds, and rubber "b" has 300 units of torque with 500 winds. Rubber B is going to have less winds left. More torque, less winds left, if you have the same number of winds to begin with.

[Kovu]

When we fly our helicopter it goes straight up to the ceiling and stays there for 30 or more seconds, the problem is when it falls it drops quickly. Anything I can do to help this out.