Flight Times

jander14indoor
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Re: Flight Times

Postby jander14indoor » February 18th, 2010, 2:26 pm

Ding, ding, ding, you PASS THE TEST!

er,

uh,

or maybe I made a boo, boo.


Naaaahhh, it was a test, that's the ticket, a test. That's my story and I'm sticking to it.

And glad I could help. Hitting weight is EASY with a good BOM.

Jeff Anderson
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planemaker
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Re: Flight Times

Postby planemaker » February 20th, 2010, 10:11 am

Hi
im using a freedom flight model kit
getting 45 seconds with 500 winds???
Very bad covering
Should i try to put more winds in and see what happens or build another wing???
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blue cobra
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Re: Flight Times

Postby blue cobra » February 20th, 2010, 10:38 am

planemaker wrote:Hi
im using a freedom flight model kit
getting 45 seconds with 500 winds???
Very bad covering
Should i try to put more winds in and see what happens or build another wing???

We need to know what size rubber you are using. But any rubber of appropriate size for an Ikara prop should take well over 500 winds (assuming you meant 500 winds on the rubber, not 500 turns of the winder).

What do you mean by bad covering? As I understand the Freedom Flight kits include Mylar, which is a good covering, so did you use something else, or did you mean you didn't put it on very well?

It sounds like you're new, so I would say the first thing to do is to weigh the plane. You need to get near 7g to be competitive. If you are significantly overweight, your plane can not fly well. Next, lube your rubber (with Armor All original formula, for example. Look in the Rubber thread) and put in way more winds. I easily get 1350 winds into 0.090" rubber, and I think you could probably get even more in. Then trim and fly. As I understand the Freedom Flight kit has a 15cm chord wing and laser cut ribs, so unless you had poor craftsmanship I don't think the wing is to blame.

Others may be able to lend more assistance, but I hope I could help.
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Re: Flight Times

Postby leetx » February 20th, 2010, 11:33 am

jander14indoor wrote:Ding, ding, ding, you PASS THE TEST!

Yeah, I passed the test!

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Re: Flight Times

Postby Brucester » February 20th, 2010, 5:20 pm

The winning time at Solon was 2:52 by Bala Cynwood. I agree with Jeff, it's going to be really competitive at nationals, and I bet people will hit 4 minutes.
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Re: Flight Times

Postby eta150 » February 21st, 2010, 2:52 pm

Actually, it was 2:46 (my plane). I agree that it will be way higher at nats, because, having approached 3 minutes in a ~20 foot gym, a 98 foot field house should give a significant increase.
P.S. It's Bala Cynwyd
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Re: Flight Times

Postby goblue007 » February 22nd, 2010, 6:42 am

jander said, Trim. Where's your cg with respect to your wing (either leading or trailing edge)? What angle of attack are your wing and tail at? Prop offsets? Wing offsets? Wing twist? Tail offset? Etc. In flight, is your plane on the edge of a stall, or over stabil? Dutch roll? Flight attitude (nose or tail high, wings level, rolled into or out of turn). Also, etc.

ok, the cg is on the trailing edge, the angle of attack is the leading edge is about a 1/4 in above the trailing, the wing is off set of the right and the their is not very much twist ( we are using the 2010 freedom flight model)
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Re: Flight Times

Postby eta150 » February 22nd, 2010, 9:56 am

The way the plane flies is important too. You can tell a lot of the problems with trim by seeing if it's stalling, turning too quickly, or flying very flat, smooth, and stable.
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Re: Flight Times

Postby jander14indoor » February 22nd, 2010, 2:41 pm

goblue007 wrote:jander said, Trim. Where's your cg with respect to your wing (either leading or trailing edge)? What angle of attack are your wing and tail at? Prop offsets? Wing offsets? Wing twist? Tail offset? Etc. In flight, is your plane on the edge of a stall, or over stabil? Dutch roll? Flight attitude (nose or tail high, wings level, rolled into or out of turn). Also, etc.

ok, the cg is on the trailing edge, the angle of attack is the leading edge is about a 1/4 in above the trailing, the wing is off set of the right and the their is not very much twist ( we are using the 2010 freedom flight model)


Unless you have a partner posting under another aim, this is kind of out of the blue, since your last post was in Dec, so I'm not sure what the question is???

CG location is in at least the ball park, but the wing angle of attack seems a little extreme. Wing offset, discussing this on another string, not sure which "right" you mean. If looking at the plane from the front, OK, if from the rear, or as if a pilot sitting in the motor stick its backwords.

Like eta150 said, how's the plane behaving?

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eta150
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Re: Flight Times

Postby eta150 » February 22nd, 2010, 3:05 pm

I think his partner was hamtown.
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Re: Flight Times

Postby jcollier » February 22nd, 2010, 6:30 pm

eta150 wrote:Actually, it was 2:46 (my plane). I agree that it will be way higher at nats, because, having approached 3 minutes in a ~20 foot gym, a 98 foot field house should give a significant increase.
P.S. It's Bala Cynwyd


Good time! I agree that a 98' field house should allow some incredible times. I am guessing it will take over 3 min. to win states this year, with several teams being much closer in time than last year. With the changes in our team this year, I doubt that I will be able to assist John as I have for the past 2 years. It was fun, and the stale, humid air didn't bother me a bit compared to seeing all the planes and gliders fly. :D

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Re: Flight Times

Postby Greg Doe » February 28th, 2010, 3:50 pm

Weekend report Feb. 27, 2010;
2:05 and 1:39 took first and second at one regionals; there was some ventilation turbulence.
1:55 took first at the other regionals. This is the one I didn't get to go to, but understand
there was bad ventilation turbulence. They didn't shut the heat and air blowers off!
There really wasn't much competition at either regionals, but my students were thrilled with
winning. States will be much tougher.
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Re: Flight Times

Postby 3slh9 » March 1st, 2010, 11:44 am

Winning time at the NE Kansas Regionals was 2 minutes 41 seconds. That was with blowers on. We took 5th with 1 minute 52 seconds.

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Re: Flight Times

Postby eta150 » March 2nd, 2010, 8:38 am

Winning time at PA SE regionals was 2:48 (Bala Cynwyd), followed by 1:37, 1:28, and somewhere between 1:25 and 1:10.
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Re: Flight Times

Postby jcollier » March 2nd, 2010, 11:24 am

Nice time. Looks like you are pretty consistent with it. Doesn't sound like it was too nerve wracking for you with that margin of victory. Good luck at States!


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