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Old Sep 30, 2009, 10:31 AM
Master Of The Crash
Big Johnny's Avatar
Vass, North Carolina
Joined Jan 2009
108 Posts
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GWS Beaver Brushless Help

Ok Fellas, Yesterday I purchased a GWS Beaver. Wanting to go brushless, I also purchaced a SuperTigre 370 brushless motor, SuperTigre 20 amp Esc, & 3s1p 1250 10C Lipo. Do ya'll think this setup will fly the Beaver? Being fairly new to the electric thing, I'm still sorting out all the different varibles of electric flight. I think this motor may be on the small side. It is supossed to weigh between 10 - 13 ounces. I imagine It might weigh, maybe 1 or 2 ounces more. I plan on adding ailerons. Please Give Your Feedback. Thanks: Big Johnny


Here are the motor Specs.

Diameter. 28mm
Lenght. 26mm
KV. 1000
Input 7.4 - 11.1V
Max Constant Current. 11.5 amps
Max Surge Current. 13 amps
Max Constant Watts 125 watts
Prop Size 8 X 3.8SF - 11 X 4.7 SF
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Old Sep 30, 2009, 11:41 AM
Sky good, Earth bad!
Dakrat's Avatar
Anchorage
Joined Dec 2005
1,238 Posts
I think it should fly... No problem....
Dak
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Old Sep 30, 2009, 09:27 PM
Registered User
Crossville, TN
Joined Dec 2004
2,907 Posts
You will have inflight failure with 125w. The stock wing struts won't take it. I tried ailerons..the wing twists at the outer strut fitting making the ailerons as if they were not there. The 3s battery will require extensive battery compartment rework.
Best to go with two cells and prop for 70w. ( built 12 GWS Beavers )
Save your 370 motor and 20a ESC for an aileron plane.
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Old Oct 01, 2009, 01:13 AM
IAMCANADIAN
Grejen's Avatar
Canada, BC, Squamish
Joined Jul 2002
4,744 Posts
Mine flies scale like at about 40 watts wide open. I use the stock 350 brushed motor and a 2S 950mah battery. The plane weighs about 15 oz with the floats.

If you want to use that motor it'll be way under utilized. Of course if you used a smaller one you'd probably have to mod to move the battery further forward or add nose weight anyway.

As Art says (and he knows) stick with 2 cells and a prop with more pitch. hmmmm 1000kv I'm not an expert with the numbers but probably something around 9X7 or 10X8 maybe. If you're using a 3 cell then start with that 8X3.8 prop. Of course if you want your Beaver to be able to hover ....

Hmmm.. there used to be an epic thread on the GWS Beaver around here somewhere.... ah found it...
http://www.rcgroups.com/forums/showthread.php?t=1059440

There's a link to
http://www.parisjunctionhobbies.com/gwsbeaver

As Art also mentioned this plane is not a good candidate for adding ailerons. You'd need to replace the wing.
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Last edited by Grejen; Oct 01, 2009 at 01:27 AM.
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