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Old Dec 06, 2008, 08:53 AM
more_eggs is offline
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hi there..
ok so say i were to be making a wing off this design out of coroplast (i live in australia and cannot find anything equivalent to blucor), scaled down to 22'' wingspan...and i ran this motor http://cgi.ebay.com/ws/eBayISAPI.dll...m=160302682156
with a 2s 850mah lipo...
wat are the chances of it actually flying up and away as opposed to directly into the ground infront of me?
any help would b great and im sorry if this kind of question has become extremely repetative...im just a little new to the whole plane,brushless and propellor scene...
cheers,
matt
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Old Dec 06, 2008, 09:20 AM
Murman is offline
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Quote:
Originally Posted by FASTBEN
hi all this is the best and most informative thread i have read......i will be building one for sure im new to the wings so i may ask some stupid questions and all,btw i have a just go fly 300df pusher witch size wing should i go for i need the speeder.
thanks
ben
Acer at Speedwing.net used that motor on one of his 24" wings. I think anything between 24" and 30" would do just fine.
Old Dec 06, 2008, 10:29 AM
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I think coroplast would be too heavy. Wouldn't hurt to try, but I'm about 11-12 oz with a 3 cell 1320, so a 2 cell is going to be pushed pretty hard.
Old Dec 06, 2008, 11:06 AM
FASTBEN is offline
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Quote:
Originally Posted by Flatulator
Acer at Speedwing.net used that motor on one of his 24" wings. I think anything between 24" and 30" would do just fine.
thanks a bunch for the help i guess that will be the size 30".
ben
Old Dec 06, 2008, 12:46 PM
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I flew a 48" wing made from 3mm coroplast, and it was a lot heavier than a wing made from blucore. It was underpowered with a 400 brushed motor. Once you get some altitude and keep your speed up it handled great. With some of the more powerful brushless motors you could have a pretty cool bulletproof wing.
Old Dec 06, 2008, 06:03 PM
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ok cool... i also have a 3s 1000mah from my honeybee king 2...might also give it a shot..
iv found one other thing here in aus that slightly resembles some things iv heard about..
u can buy it at picture framing shops and its a thin foam board with eaither thin cardboard or thick paper on it...im pretty sure the paper can be peeled off..would this be a better option? i might try and go for a 32'' as oposed to my original thought of 22''........would this little motor still be enough?
thanks for ur help..this is honestly the best wing thread i have ever come accross..
matt
Old Dec 09, 2008, 10:31 AM
FASTBEN is offline
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HI GENTELMAN,anyone has the plane for the 32" speed wing?
thanks
ben
Old Dec 09, 2008, 06:49 PM
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page 1.
Old Dec 09, 2008, 08:05 PM
FASTBEN is offline
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Originally Posted by more_eggs
page 1.
thanks bud.
ben
Old Dec 10, 2008, 02:10 AM
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welcome
Old Dec 10, 2008, 04:36 AM
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hi guys...
so i decided to go with the paper covered stuff and make a 31''....man was the paper annoying to get off..soaked it and then rubbed it all off..
bought one of these puppies:

http://cgi.ebay.com.au/ws/eBayISAPI....m=120340805662

which i shall run with a 4.75x4.75 APC prob on both a 2s 800 mah and a 3s 1000mah...i also have a smaller 5x3 and a 4.2x2...
how do u think i will do for speed, thrust and amp draw?

cheers,
matt
Old Dec 10, 2008, 07:13 AM
LADDIE is offline
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Quote:
Originally Posted by more_eggs
hi guys...
so i decided to go with the paper covered stuff and make a 31''....man was the paper annoying to get off..soaked it and then rubbed it all off..
bought one of these puppies:

http://cgi.ebay.com.au/ws/eBayISAPI....m=120340805662

which i shall run with a 4.75x4.75 APC prob on both a 2s 800 mah and a 3s 1000mah...i also have a smaller 5x3 and a 4.2x2...
how do u think i will do for speed, thrust and amp draw?

cheers,
matt

I am using 99.9 % pure Methyl Hydrate liquid to remove the paper from the foam boards. It is available in the Canadian Tire stores. I am sure that the hardware store in your area will have it. As well The Home Depot or Lowes might have it.
Splash some liquid onto the board and with the rug spread on whole sheet. After 20 seconds the paper should peel off easilly.
Laddie.
Old Dec 10, 2008, 10:28 AM
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Quote:
Originally Posted by more_eggs
hi guys...
so i decided to go with the paper covered stuff and make a 31''....man was the paper annoying to get off..soaked it and then rubbed it all off..
bought one of these puppies:

http://cgi.ebay.com.au/ws/eBayISAPI....m=120340805662

which i shall run with a 4.75x4.75 APC prob on both a 2s 800 mah and a 3s 1000mah...i also have a smaller 5x3 and a 4.2x2...
how do u think i will do for speed, thrust and amp draw?

cheers,
matt
According to this motor calculator: http://www.adamone.rchomepage.com/calc_motor.htm

The 4.75x4.75 prop on a 3s is your best bet:
It will draw 13.1 amps and have a speed of approx 90 mph with a thrust of 13 oz. Personally I think the speed estimate is a bit high - probably will be more like 70 mph when you take air frame drag into account.

The 5x3 prop will give similar thrust but only go 60 mph at 8 amps

The 4.2x2 would really be dismal at around 42 mph at 5.5 amp draw and only 10 oz of thrust.

Don't bother with the 2s battery unless you plan to run a much larger prop. An APC 7x5 would work with a 2s battery (17 amp draw, 17 oz thrust but only 53 mph)

Chris
Old Dec 10, 2008, 11:32 AM
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Or a 6x4 prop on a 3s battery will draw 18 amps, give you 23.6 oz thrust and about 73 mph. Now that's a pretty good combo. You'll need the thrust if you want some impressive verticals...
Old Dec 10, 2008, 03:30 PM
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what to do to get rid of flutter.
i have cf across already, taped leading edge. but at 10 seconds into a level ft flight it'll vibrate and flutter.
power is donsrc wicked jr, 3s 1300, 30 amp esc.
any suggestions on making it stronger? fg i have melted the test foam i have
BTW its made of 1/2 blue cor sanded to an airfoil.
TIA


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