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Old Jul 21, 2015, 07:04 AM
Finnspeed is offline
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F3A Team Finland
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Järvenpää, Finland
Joined Nov 2005
995 Posts
scirocco, I actually had APC E 17 x 10 in the plane for a moment. It is clearly lower load to the motor than my 16 x 12 "wide blade". There's lots of static thrust but the plane feels sloppy in the air and it is struggling in vertical up lines.

Watdazit, the phenomenon you describe is very familiar to me, it happened with the low pitch props I have tried so far, including the 17x10. Going to 16x12 should change the behavior a lot. Of course, the ESC can have something to do with the throttle response. To tune it, you could either test different timings on the ESC or adjust throttle curve to your liking on the TX.

By the way, my plane made quite bad resonance sounds when flying knife edge earlier. Turns out, adding some foam padding and tape on strategic points between the cabin and fuse (small adhesive foam pads) as well as cabin and motor cowling (strip of tape) made the resonances go away.
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Old Jul 22, 2015, 01:23 AM
Watdazit is online now
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A geriatric flier
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Australia, NSW, Braidwood
Joined Nov 2008
1,223 Posts
Quote:
Originally Posted by Finnspeed View Post
.......................Watdazit, the phenomenon you describe is very familiar to me, it happened with the low pitch props I have tried so far, including the 17x10. Going to 16x12 should change the behavior a lot. Of course, the ESC can have something to do with the throttle response. To tune it, you could either test different timings on the ESC or adjust throttle curve to your liking on the TX.................
Firstly I am going to try a 16 x 12 APC tomorrow...subject to the weather. EDIT I put the figures into ECalc and it comes up with a max size of 15 x 10 APC E so I will go back and try that first.
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Last edited by Watdazit; Jul 22, 2015 at 02:15 PM. Reason: More info
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Old Jul 22, 2015, 04:04 AM
unleaded218 is offline
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newcastle AUSTRALIA
Joined Nov 2010
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Watdazit I usually fly Saturday and Wednesday ,Wednesday is a great day because its usually us older guys we have a joke that say if you are under 70 you cant fly lol but i am only 69 this year so i get away with it , i will order a few props to test and i am also getting one of those ally backed venterlated spinners from HK , I am still cant beleive the quality of this kit compared to any other I have purchased since I cam back to aero modeling in 2010 although I have been in the hobby since I was 14 years old (control line) and ten again in the late seventys through to the 1990 (radio control)
my model has all the latest modes on it tail plane tab , u/c supports and the wing and tail plane fit perfect against the fuse
I every thing turns up by the weekend I should be able to maiden next Wednesday
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