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Old Oct 28, 2011, 08:27 AM
Lysdexic I'm
HeeBeeGeeBee's Avatar
Spring, TX
Joined Oct 2010
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Thanks for all the tips guys. I'll check 'em all out.
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Old Oct 28, 2011, 09:27 AM
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Joined Apr 2007
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Quote:
Originally Posted by demonGti View Post
Exactly, some guys fit potent engines to small cars only to break sideshafts, beef them up and the diff breaks, beef that up and engine mounts break, beef them up..... you get the idea. Its an on going problem over powering any vehicle (or model in this case) that was never intended to cope with excessive power. A fun project if you're that way inclined, but can become very tiresome... not my idea of fun.
That may be true, but I would love to see some video of the AMR on 4S !!!!!
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Old Oct 28, 2011, 05:26 PM
If it's to be, it's up to me.
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Sydney, Australia
Joined Jan 2007
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My mate flies his on a 4s 1800 pack. It runs a smaller prop so it doesn't have the 3d authority that mine does, but it is faster.
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Old Oct 29, 2011, 07:41 PM
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Canada, BC, Vancouver
Joined Feb 2009
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Quote:
Originally Posted by subsonic View Post
My mate flies his on a 4s 1800 pack. It runs a smaller prop so it doesn't have the 3d authority that mine does, but it is faster.
I was using a 13 x 4 but tried a 14 x 7 to-day and the plane was crazy in KE spins etc especially with full power!!!! On the 4th flight the prop adapter, prop and spinner disappeared over some fir trees, rest of the plane is fine.Have to wait for parts to come from Australia as it's quicker than the US if you live in Canada.
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Old Oct 29, 2011, 07:58 PM
They Call him Dead!
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United States, SC, Pawleys Island
Joined Jul 2003
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14 x 7 on 4s? Are you kidding???
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Old Oct 29, 2011, 09:06 PM
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Canada, BC, Vancouver
Joined Feb 2009
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Quote:
Originally Posted by dead View Post
14 x 7 on 4s? Are you kidding???
No, it seems to work fine now I've glassed the mount around where the motor bolts on and also to the #1 former/bulkhead. Flying with a Nanotech 1.3 4cell so it's quite light. Goes crazy when you give it full down elev and full throttle.
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Old Oct 29, 2011, 10:01 PM
They Call him Dead!
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United States, SC, Pawleys Island
Joined Jul 2003
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Yeah but what motor are you using? I am sure you are going to burn it up....
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Old Oct 29, 2011, 11:08 PM
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Canada, BC, Vancouver
Joined Feb 2009
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Quote:
Originally Posted by dead View Post
Yeah but what motor are you using? I am sure you are going to burn it up....
Thrust 40.
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Old Oct 30, 2011, 02:35 AM
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South Africa, GP, Randburg
Joined Dec 2006
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What!?! I'd like to see your numbers on this.
Do you have a WATT meter to show us volts/amps/watts?
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Old Oct 30, 2011, 03:52 AM
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Aberdeen
Joined Mar 2006
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A Thrust 40 swinging a 14 x 7 prop should be pulling about to 80 Amps and 1.1Kw. I find it hard to see how that can be so without smoking the motor?

You would also be discharging your 1300mAh batteries at 62C, that would give one minute flying time at WOT

Only thing i can see that might explain how you haven't smoked the motor already (assuming you are not winding us up) is that due to the super high discharge rate on those small cells voltage must be sagging massively. Suggest you put a Wattmeter on it before you run again.

Steve
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Old Oct 30, 2011, 05:05 AM
If it's to be, it's up to me.
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Sydney, Australia
Joined Jan 2007
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Quote:
Originally Posted by cepheus View Post
Thrust 40.
Yes! I love to see people stress testing this system. I always thought the T40 had some in reserve.

Need the numbers!
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Old Oct 30, 2011, 02:24 PM
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Canada, BC, Vancouver
Joined Feb 2009
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I don't have a meter but the guys at the local flying field do. I'll try and do this next time I'm there. Won't be till early Dec as I'm heading to Ca. Also there's a weather component up here in the coming months.Looks like a tough winter possibly. The motor won't overheat most of the year in Vancouver!!! Will post the figures when done.
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Old Oct 30, 2011, 06:39 PM
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United States, GA, Acworth
Joined Mar 2011
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nailed my first KE spins with the AMR today...they look so cool in a bipe
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Old Oct 31, 2011, 08:31 AM
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NeverEnough's Avatar
USA, AZ, Phoenix
Joined Nov 2009
472 Posts
Figured out something goofy with the AMR when getting it to KE Spin. Instead of up rudder (Like I would on other planes), I gave it down rudder and it spun super tight and fast. It stayed locked in too. It was awesome. Anybody else done this?
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Old Nov 01, 2011, 08:58 AM
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Bridgeton, NJ
Joined Mar 2009
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Quote:
Originally Posted by cepheus View Post
I was using a 13 x 4 but tried a 14 x 7 to-day and the plane was crazy in KE spins etc especially with full power!!!! On the 4th flight the prop adapter, prop and spinner disappeared over some fir trees, rest of the plane is fine.Have to wait for parts to come from Australia as it's quicker than the US if you live in Canada.
That's pretty sad.
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