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Old Jan 16, 2013, 10:36 AM
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United States, MD, Cambridge
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Originally Posted by ashdec87 View Post
Does anyone use prop savers? I have one on mine, but I dont know how much help it is. Plus I think the rubber bands are cheap because they keep breaking in storage. I currently have two bands on there as I push 500w at WOT.
In my opinion, you get too much vibration when using prop savers on larger props or higher KV motors. I tend to stay away from them.
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Old Jan 16, 2013, 11:24 AM
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elCapitan's Avatar
United States, UT, Provo
Joined Oct 2011
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I use prop savers on all my planes, except where i have folding props. I get rubber bands from home depot, and go a little thicker than the ones they come with
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Old Jan 16, 2013, 01:02 PM
Lee
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USA, UT, Orem
Joined Jul 2004
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I use #12 and #15 plumbing O-rings from Home Depot for the pushers but I don't use prop savers on the big motor pullers. The puller props like to come off and go shooting into space.

I have also cut surgical tubing into thicker bands that work but I think the O-rings are easier and stronger.
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Old Jan 16, 2013, 01:15 PM
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United States, MI, Detroit
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Ok I'll try those. These stupid bands break for no reason....
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Old Jan 16, 2013, 01:44 PM
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United States, KY, Fort Campbell
Joined Jan 2010
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So I used a prop calculator on the 3536-1800 and supposedly the 9x6 is pulling more amps than recommended. As I don't have any way to measure, does someone know what theirs pulls?
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Old Jan 16, 2013, 02:04 PM
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United States, MD, Cambridge
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The original motor I had on my Grim Reaper -- one of those C-3530 1700KV motors from PlaneInsaneRC -- used a 7x6 prop, as recommended. That's on 3S. Off the bat, a 9x6 prop on a 3536-1800KV motor seems too large. For reference, I use a 9x6 prop on a 3536-1450KV now, and that draws well under the max recommended amps.
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Old Jan 16, 2013, 05:44 PM
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United States, SC, Lancaster
Joined Nov 2010
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Originally Posted by kid at 55 View Post
Are the 2200 mAh 3cells battery too small for the Grim Reaper to get the CG right ?
Quote:
Originally Posted by ashdec87 View Post
Not necessarily, depends where you place it and the rest of your electronics. Keep the wing tips light and you might be ok
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Originally Posted by elCapitan View Post
actually, I think a 2200mAh 3S is probably the most popular battery for the Reaper, but in the end it really is all about CG.

Before you dig in your electronics, what a lot of people do is measure where CG should be, on the bottom of the wing, stick a couple pushpins in, and lay the electronics on the top. Try to balance the wing on the pins, and shift the electronics on top as needed, until you're balanced. Then mark where everything is, and cut the bays.
Thanks guys.
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Old Jan 16, 2013, 06:31 PM
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United States, KY, Fort Campbell
Joined Jan 2010
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Quote:
Originally Posted by fnffishcore View Post
The original motor I had on my Grim Reaper -- one of those C-3530 1700KV motors from PlaneInsaneRC -- used a 7x6 prop, as recommended. That's on 3S. Off the bat, a 9x6 prop on a 3536-1800KV motor seems too large. For reference, I use a 9x6 prop on a 3536-1450KV now, and that draws well under the max recommended amps.
It does seem too large, could I reduce the maximum throttle setting to not exceed the max amps?
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Old Jan 16, 2013, 07:03 PM
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United States, FL, Key Largo
Joined Apr 2011
147 Posts
what are some good cheap 2200mah batterys? there are so many out there and i need new batterys since my other ones are either A, burnt out (like wont hold charge anymore) or B, look like then are destroyed and very dangerous to fly with) and i dont want to have three diffrent batterys to fly with anymore, and i was also thinking of maby running two 2200mah batterys in paralle, or running two 1500s or 1800s, what do u guys think? should u run the 2200s? or go smaller ones maby?
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Old Jan 16, 2013, 07:22 PM
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United States, MI, Detroit
Joined Feb 2004
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Try the Nanotech from hobbyking. The nanotechs I have are AMAZING and CHEAP
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Old Jan 16, 2013, 07:42 PM
UH60 Pilot
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United States, KY, Fort Campbell
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Try the Nanotech from hobbyking. The nanotechs I have are AMAZING and CHEAP
Yeah, and order from USA site
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Old Jan 16, 2013, 08:23 PM
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United States, MD, Cambridge
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Originally Posted by E1Allen View Post
It does seem too large, could I reduce the maximum throttle setting to not exceed the max amps?
That, I do not know. I really only know the basics of my radio, so mayhaps that's possible? Why not just keep it simple and prop down a size or two?
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Old Jan 16, 2013, 08:51 PM
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United States, KY, Fort Campbell
Joined Jan 2010
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I probably will, but until new ones come in I'm going to FPV maiden this thing Friday or Saturday
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Old Jan 17, 2013, 12:02 AM
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United States, UT, Provo
Joined Oct 2011
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Originally Posted by E1Allen View Post
Yeah, and order from USA site
Yep, Turnigy nanotech are pretty much all i buy now
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Old Jan 17, 2013, 01:47 AM
UH60 Pilot
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United States, KY, Fort Campbell
Joined Jan 2010
273 Posts
Just finished my first fpv wing. I opted for less color as it already weighs 6.4lbs.

61" Deep Reaper XL
1.3g 800mw
Dragonlink V2
16,000mah. 3s parallel

Looking forward to FPV maiden flight this weekend.
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