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Old Feb 04, 2015, 10:12 PM
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Powered glider

I recently just built a foam powered glider. It has a 10 foot wing span. I have a turnigy 1000kv brushless outrunner on it and it barely pushed the plane on the ground. I'm in search of a motor under $30 that can get my 6 pound 10 foot wing span motor in the air. Can yall give me some options. Thanks a lot.
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Old Feb 05, 2015, 04:02 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
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More information would be nice, and a picture.

Which Turnigy motor ?

What prop used ?

What battery pack used ?
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Old Feb 05, 2015, 10:21 AM
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Well I looking for a motor that will fly a 6 pound plane 10 foot wing span.

Using a 3s 1300 mah 1.3a 20c li po battery.
9x6 prop
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Old Feb 05, 2015, 10:28 AM
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Canada, ON, Owen Sound
Joined Oct 2008
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Typically you would want a motor that produces 600watts. That's very difficult on 3S,especially with a 9/6 prop. A motor like the HK 3548-900 with a 12/6 should get near 500watts at 48a or so. If your esc is big enough to handle the loada nd the motor is rated for 4S with the 9/6, it might give you the thrust you need.
You need to tell us which motor your now using, sounds small for the job at hand. You will also have to increase your battery size substantially to be able to deliver the amps required and achieve a reasonable flight power time. Even a 15a draw is really asking a lot from that little 1500/3s you have, needs mor like a 3300-4000mah. Doug B
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Last edited by Doug Bartley; Feb 05, 2015 at 10:31 AM. Reason: add
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Old Feb 05, 2015, 11:24 AM
ParkScaleModels
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United States, PA, Loganville
Joined Feb 2002
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For a glider, 100 watts per pound is beyond excessive unless he's looking for near vertical takeoff. You would probably be just fine with a 200-250 watt setup.

How much wing area do you have? Are you fixed with having a 9x6 prop? A larger prop would be better for generating more thrust without having to spin the prop faster. You can turn a bigger prop (diameter and pitch) on a lower kV motor with 3S and get more thrust than you can with your current setup. You'll end up with a lower pitch speed, but for a glider I doubt that is going to be a problem for you.

Do you have any idea of your gliders wing area?
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Old Feb 05, 2015, 11:38 AM
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If I could figure out how to post a pic I could show you what it looks like
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Old Feb 05, 2015, 12:02 PM
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Quote:
Originally Posted by zbrubaker View Post
For a glider, 100 watts per pound is beyond excessive unless he's looking for near vertical takeoff. You would probably be just fine with a 200-250 watt setup.

How much wing area do you have? Are you fixed with having a 9x6 prop? A larger prop would be better for generating more thrust without having to spin the prop faster. You can turn a bigger prop (diameter and pitch) on a lower kV motor with 3S and get more thrust than you can with your current setup. You'll end up with a lower pitch speed, but for a glider I doubt that is going to be a problem for you.

Do you have any idea of your gliders wing area?
Check your power setup with this site:

http://brantuas.com/ezcalc/dma1.asp

Turnigy motors are not listed but use one comparable.

Most powered gliders are hand launched and belly landed.

Have you tried hand launching the plane un powered to see if it glides? If it does fly, try hand launching and using your existing power setup to see if it will climb.

If not then you need a bigger prop or go up to a 4S if your ESC can handle it.

Play around with the motor calc.
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Old Feb 05, 2015, 12:06 PM
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How to post pictures:

http://www.rcgroups.com/forums/showt...u+post+picture
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Old Feb 05, 2015, 12:13 PM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
14,423 Posts
Quote:
Originally Posted by Dylanw43 View Post
If I could figure out how to post a pic I could show you what it looks like
Below the add a 'new message' box is a tab - Go Advanced - clcik on it for a larger message box, with a box below that for attaching pictures.

Click on the '+ Drag Files Here or Click to Browse - and it should call up your computers director for a picture.
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Old Feb 05, 2015, 08:05 PM
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Here is a picture
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Old Feb 05, 2015, 08:22 PM
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I'm scared to hand launch it because this is home made and not perfect so I rather play with the motor
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Old Feb 05, 2015, 09:09 PM
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This is the motor and all the specs
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Old Feb 05, 2015, 09:19 PM
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This ought to work. What do you think
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Old Feb 06, 2015, 05:39 AM
ParkScaleModels
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United States, PA, Loganville
Joined Feb 2002
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There are a lot of variables that we don't know, but with the info you have given, here is a power system You might want to consider:

Turnigy Park480 1020kV
30A ESC
3S 3000mAh LiPo
10x6 prop
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Old Feb 06, 2015, 10:08 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
14,423 Posts
Looking at the picture of the model, is it a big wing attached to an existing model ?

It's just that the tail plane looks very small for that size of wing, unless the moment arm is longer than the picture implies.

Can you post a side view ?
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