I like scale aircraft, and I like scale speeds. If it doesn't have a full fuselage, and doesn't bear a passing resemblance to something scale, I don't want to fly it.
Which was why, when I heard the Parkzone Corsair prop would work on the T-28 Trojan, I went out, and bought the 9x7.5 Corsair 3-blade prop for the Trojan. Broke a few of 'em, because they tend to be kind of weak at the hub, but I was generally happy with the prop.
Then, last weekend, I was told to try the Master Airscrew 3-blade 10x7 prop on the Trojan. I was allowed to fly a Trojan that was so-equipped and I found it to be a real fire-breather, and it got the wheels turning. I wasn't sure what that heavy glow prop would do to my stock power setup, so I decided that the only way to be sure was to get my trusty wattmeter and all three 3-blade props and try them all out.
To get my amp numbers, I used a fresh E-Flite 3200 mAH 3S lipo. Able to push more current for longer than the Parkzone 1800 mAH 3S LiPos, or even my 2200 mAH cells. When I ran my static tests, I encountered an unpleasant surprise:
The Parkzone Corsair prop is an amp hog. It pulled 20.3 amps and has only modestly better performance than the MA 9x7 3-blade prop, and comes nowhere near matching the performance of a MA 10x7 3-blade prop.
Next up was the Master Airscrew 10x7 3-blade prop. I was half-expecting bad things, but . . . surprisingly, the 10x7 3-blade prop only pulls about 19.5 amps. On the stock motor and old 25A E-
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