|Jan 18, 2003, 05:39 PM|
Joined Oct 2002
Re: What prop for crazy max 4.25 gearing?
Try this neat WEB site at Custom Paint Job...
|Jan 18, 2003, 10:49 PM|
alvinm: I think it's a 9x4.7. I remember somewhere, Mike Greenshields posted the info... I have a 4.25 on order to try.
Here's Pcalc numbers:
EM300, 3.67:1, 7.5x5, 8x800AAE
14.1oz thrust, 39.1mph, 6.45a
EM300, 4.25:1, 9x4.7, 8x800AAE
15.1oz, 29.8mph, 7.14a
Not too impressive... But, testing will see!
|Jan 19, 2003, 09:21 AM|
Isn't the stock prop 7x 5.5 ?you have 7.5 unless that is what you meant.
I currently tried the 8x6 apc and got theses figures:
Prop Static Thrust oz:15.3
Prop In-flight Thrust oz:7..9 Prop Pitchspeed:40.5
Approx Power System Weight: 8.844 oz Batteries + Motor + 10%
Full-throttle duration: minutes 7.26
Amps were around 6
|Jan 19, 2003, 04:43 PM|
Mike G. recommended the 9x6 APC-SF and that's what I tried. It has more pulling power than the stock setup, but top speed is a little lower as you would expect. It's a good gearing / prop combo for smaller fields.
- Zoom -
|Jan 19, 2003, 04:56 PM|
I use a slowfly 10/4.7 on 8x800 nihms and will almost hover on a fresh charge. Also you may want to make a new set of longer landing gear for clearance.
With elevator/flap mixiing it will ROG off the grass in less than a foot. Cool mod for five bucks.
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