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Old Jan 03, 2013, 01:17 PM
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Seattle, WA & Las Vegas, NV
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Joined Sep 2003
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Originally Posted by Cpig View Post
This is probably a stupid question but what prop do I need if running the 2815 motor on 4s. The Finwing website says APC9060 but NOT EP 9060. The only APC pusher prop that I find is APC 9060EP, is this the same EP 9060 they say not to use? Will this prop work or not?
The below image shows recent prop test results for my Penguin which can be found on my Build Log. The test was run on my bench tester with an HK SK3530-1400 Motor (2815-1400 equiv.) and 3S Packs. The first 5 props shown on this chart are 9x6, the last one is a 9x5.

I selected the Xoar 9x6 for mine because it is really quiet and they are darn near perfectly balanced. Pusher props generally just reverse the rotation and were originally designed to accomodate a Glow engine which will only run one direction. Some of the prop manufacturers like Master Airscrew also move the centering bushing to the opposite side of the hub for a better fit (too bad they are so inefficient ).

The APCe props work really well, they are just a bit noisier than pretty much everything else. If you are going with 4S and a KV around 1400, go for the Graupner 9x5 eProp also shown on this chart (make sure it's the eProp). This prop is wicked on 4S.
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