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Post by toff on Jun 30, 2013 16:40:16 GMT 1
 Bought this from a local fellow for the princely sum of £15.00. It was airframe only, inc servos. Now has a 1300 kv beast up front, with a 40A esc, and a 2200 3s. Soon as I have more pennies, that's getting swapped out for a 60A esc and 4s. Can't wait to try it out!!  |
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Post by gagallagher04401 on Jul 15, 2013 12:25:24 GMT 1
Very Sweet, I love the sticks. I have the e-flite mini stick, with a kick butt brushless setup on it. I also fly a great planes GIANT big stick, with a 40cc gasoline engine, swinging a 18 inch prop, plane flies like a dream, slow, fast, just a gentle giant.
George
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Post by toff on Aug 2, 2013 21:55:54 GMT 1
Holy batman! When I originally fitted the motor with an standard electic 9x6, I got 158 watts at 18+amps. Broke that in a rough landing, and the only 9x6 left was the SC prop.
Bloody hell!! 250+ watts, 26 amps at 3/4 throttle! (Blade needs balancing, so that's as far as I got before it shook too bad). 2200 3s 35c lipo, 40A esc. Can't wait to test it out!
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Post by flydiver on Aug 2, 2013 23:27:42 GMT 1
What prop? The top pic looks like a GWS 9x4.7. There is no SF GWS 9x6. GWS SF are pretty lame props only suitable for SLOW KV motors and SLOW planes. For THAT application they are pretty good.
It was probably flattening out badly on you. Likely WAY over RPM limits, could have 'blown up'.
The Cub stock 9x6 is a much better prop actually, pretty stiff. It's a SF type vs. the GWS 10x6 DD which is the thin electric variety.
Pretty easy to tell the 2 general types apart:
small hub - SF; best for torque and lower RPM applications. GWS are very floppy, APC are much more robust
large hub - thin electric/direct drive; Suitable for high RPM applications. GWS and APC kind of equivalent here.
There are hoards of copies and other types making a wattmeter pretty much a requirement if you go there. Good on you for checking out what looked 'on paper' to be the same but turned out to be QUITE different.
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Post by toff on Aug 2, 2013 23:58:30 GMT 1
Yep fly - 9 x 4.7 on the original.( I am running very low on larger size props, due to sales, accidents and loss - Just ordered a ton of props from Giantshark.co.uk). Got to admit, the difference is pretty astonishing ( I can feel a headache coming on!  ) All props ordered are APC or 'Electric speed' ( whatever that means...). I have no slow fly planes at the moment ( Due to change when I finish the slow stick legacy for my nephew : www.rcgroups.com/forums/showthread.php?t=1373183 ) |
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Post by flydiver on Aug 3, 2013 1:02:36 GMT 1
I suspect if you had paid attention you could have heard it flutter, (make an odd noise) at the upper throttle range. That was distortion, common with those props when being pushed. It was flattening out and vibrating. Some of those watts measured were not useful. They can blow up....really. BTW, I think you've mention (maybe someone else?) MAS (Master Air Screw). They look nice. They are tough, tough enough to bend shafts and break motor mounts  . But they aren't very efficient. |
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Post by toff on Aug 3, 2013 3:22:47 GMT 1
Sorry fly, not me. MAS tend to be nitro bored in the UK. Electric seem to be 2.3mm to 8mm. nitro seem to be ( to me....) 4mm upwards..
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Post by toff on Aug 27, 2013 19:58:19 GMT 1
Well, now settled on a very nice electric speed www.giantshark.co.uk/product/167674/high-speed-apc-style-propeller-1005e--e10x5 10x5 = 366 watts 35A. Waiting on a 70 amp esc, as I tried a 10x8, 425+ watts, but also 45A ( And I only have a 40A esc (50A burst). I could go for 4S, but I'd have to add a lot of weight for balance, and it's not worth it. It's a happy beast on the 9x6, should be ballistic on the 10x5! |
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) All props ordered are APC or 'Electric speed' ( whatever that means...).
. But they aren't very efficient.