HXT63-64 B, HXT 100 amp ESC, A123 L/I - RC Groups
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Oct 27, 2006, 01:48 PM
Registered User
afineman's Avatar

HXT63-64 B, HXT 100 amp ESC, A123 L/I

Greetings all

I will start testing the above motor with the above ESC today ( and probably in to the evening)

I put this motor

With this ESC http://www.unitedhobbies.com/UNITEDH...idProduct=2143

Into this plane http://ak-models.com/ultimate_120.htm

Using these batteries http://www.a123systems.com/html/home.html ( via dissected Dewalt battery packs)

I will be running 10S1P of the A123 batteries, I'll be using a Hanger9 digital tach and a WattsUp meter ( or the Watt meter built in to the Xtrema V1.1 charger).

Here are a few photos before I start the soldering


OOHH I ordered the ESC on Saturday evening (sunday morning in HK) and I got it today, NOW that was fast

My wife held the motor while I took that picture.
The motor mounted on the Ultimate.
# ESCs, HTX 100 amp, Tower Pro 60 amp and Tower Pro 18 Amp
Picture from a Taxi video I did of this plane
Last edited by afineman; Oct 30, 2006 at 09:58 AM. Reason: to explain photos
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Oct 27, 2006, 02:20 PM
ARF Hater Club
tommyeflight89's Avatar
I am VERY interested in this!
I am converting a TopFlite Spit to electric, and expect a AUW of ~9lbs, so this setup may be just what I need. I am leaning towards Emolis for the batts. Can't wait for some numbers Brent.
Oct 27, 2006, 03:56 PM
In NY's beautifull hills
staggerwing's Avatar
I too am very interested--I just now placed my first order w/ U Hobbies which includes (2) of these 100A ESC's.
A note about U Hobbies;
If you are not a Pay Pal member & don't want to become one, don't try ordering from them ----I did--- & from not having my sh---t together checking out, I am now a Pay Pal member,(until I get rid of that credit card).

Brent, Just glanced @ your motor mounting, torque is going to give that mount a real test, especially from start up & if that's hardware store grade (2) threaded rod w/ cut threads as opposed to rolled, (hard to tell from the pic), it will be even more susceptible to failure.
Not trying to be critical, but for safety, maybe you should try the mount w/ motor set up on another fixed object other than the Ult .
Last edited by staggerwing; Oct 27, 2006 at 04:13 PM.
Oct 27, 2006, 04:13 PM
ARF Hater Club
tommyeflight89's Avatar
So you need PP to place an order?
Oct 27, 2006, 04:14 PM
Registered User
afineman's Avatar

1st test

Hey All

According to the UPS web site, my 2 Dewalt packs are "Out for delivery", so rather than cut up a 6S2p packs, I decided I can wait a few hours for UPS to get here.

I put everything together, and sparked it up with the 6S2P pack using a 14X7 prop, the results http://www.rcuvideos.com/view_video....7fb2f7ba36d74d

So everything runs, and I got some benchmark data, I will use this data to tweak the on-line motor simulators so I can more accurately predict what I need to do with this.

I'll update again later once I get the 10S pack built ( and another short video, the best way to keep notes )

I'll go sit by the window and wait for the Brown Guy

Oct 27, 2006, 04:17 PM
In NY's beautifull hills
staggerwing's Avatar
"So you need PP to place an order?"

Somehow my Mastercard became part of Pay Pal during the transaction
Oct 27, 2006, 05:16 PM
X-Era Motors
DavidB.'s Avatar
The controller sounds like it has huge steps in the transition...I guess I'll spend a little more and get a HV-85....
Last edited by DavidB.; Oct 27, 2006 at 05:44 PM.
Oct 27, 2006, 06:30 PM
Registered User
afineman's Avatar

The little brown guy came


I got the Dewalt packs, dissected them and made a 10S1P pack.

Here are the results still using a 14X7 prop http://www.rcuvideos.com/view_video....285b3f6d57958d

I will visit the LHS in the AM (get some larger props) and continue.

I was only drawing 27 amps and if you do the math you will see I am already up to 7+lbs of thrust so a 18-20 inch prop should do the trick for this plane.

More to follow

OOHH and DavidB I was not going up 1 click at a time, and even if it is only 20 steps to WOT on this ESC it is worth it to me, I use maybe 5 positions on my throttle, I don't need a 100 step resolution ( needing to be able to adjust power in the 1% range is not needed for how I fly)

Oct 27, 2006, 08:28 PM
Registered User
afineman's Avatar

Video for Dave


I am using a Polk III tx from 0% power to 100% power this throttle has 24 clicks.

So in the video I use 14 of the 24 clicks, I could program my tx to reduce the range, meaning more clicks are used through the usable band.

Dave I am sure if you were to use a tx where you can program the throttle limits, there would be a change per click.

The video http://www.rcuvideos.com/view_video....08aac48a549829

Hope it helped

Oct 27, 2006, 08:51 PM
ARF Hater Club
tommyeflight89's Avatar
How many watts are you expecting to run?
Oct 27, 2006, 10:45 PM
CSO#1 @UHobbies's Avatar
Originally Posted by tommyeflight89
So you need PP to place an order?
You do not need to be a paypal member to buy from us.
If you select the option to join paypal, then you will become a member.

Oct 27, 2006, 10:54 PM
High Roller designer
Impact's Avatar
Very nice brent, that's one big honken motor. Looks like with the right prop you will be good to go, What's the AUW going to be. To bad this weekend is supposed to be so crappy. I'm looking forward to see this fly, I hope we don't have to use the defibrillator to jump start anyone on the maiden voyage .......Impact
Oct 28, 2006, 03:52 PM
Registered User
afineman's Avatar

Getting really close

Hey All

Went to the LHS today and picked up a series of props, on another thread (a non topic) We have Glow and electric guys and none of us seem to know that the performance difference is between the APC E props and the Glow rated props.

This first test was to compare the 2 15X10 glow rated prop then a 15X10 E rated prop, the E prop drew more power and according to the online calculators I have my minimum goal to fly this plane 10 lb 13 Oz of thrust and a pitch speed of 68 Mph


I will still test the other props too 16, 17, 18, 19, and 20X10

OOHH and so far every thing is performing well (motor and ESC), once the testing resumes ( after wife wakes up from nap) I'll also check the various timing settings on the ESC using this 15X10E prop

Oct 28, 2006, 04:24 PM
High Roller designer
Impact's Avatar
Jump right to the 20x10 and see what you get with that. Looks good so far....Impact
Oct 28, 2006, 04:26 PM
High Roller designer
Impact's Avatar
Watching the video I saw a bit over 1000 watts, yee ha ......Impact

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