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Graham
07-27-2005, 04:48 PM
I have a Maxcim 13Y motor with a gear drive. I have not used this motor as yet and wonder if I could use it in a 5 - 6 Ib. craft as a direct drive? I am thinking something like the WM Dago Red Mustang with a 3 Bladed prop.

I suppose I could experiment on the bench, but thought I might get good info back from experience out there.

Thanks

Graham

Andy m
07-27-2005, 05:15 PM
I had a Maxcim once myself but it too was geared so I do not know how it would suit direct drive.

Try dropping an email to Tom (the guy who makes them) he is always very helpful with information. :)

Matt Kirsch
07-27-2005, 08:54 PM
I suspect that the motor won't be able to turn much of a prop direct drive, but it might be able to turn a 4-bladed prop that would be appropriate on a .40-size plane (11"-13") as-is. Do you know what the gear ratio is?

Graham
07-28-2005, 06:12 PM
Hi Matt...

I have various gear ratios I could use, around 4 - 1 seems to be what was used on a previous app. which was a 1/4 Scale Spacewalker I understand.

Matt Kirsch
07-29-2005, 02:42 PM
Hmm.. Any idea what the power system looked like on that SpaceWalker? That is, battery, prop size... If we can get a starting point, we might be able to extrapolate the right combination for a .40-size warbird.

I just looked over at P-Calc on www.flydma.com (http://www.flydma.com), and they have the entire MaxCim line listed... There are three different "13Y" motors listed. Which is yours?

Greg Covey
07-30-2005, 01:01 AM
Graham,

You'll still need the gearbox on your 13Y. Just use a lower reduction ratio starting around 2:1 and prop for 40amps on 20 cells or 6s Lithium.

Good luck!

Graham
07-30-2005, 01:37 AM
Thanks Greg.. appreciate your feedback.

Graham

ragbag
07-30-2005, 03:27 AM
If you take a motor setup for a gearbox, you have to retime it. I won't go into the complete process, but it means connecting an amp meter and load. Unsolder the back of the motor, the brush end, and turn it one way then the other until you get the lowest draw of amps.
I believe that is the way, been a while since I read the instructions and can't lay my hands on them right now.
Anyway they are timed when you get them for the direction they are to be run in.
George
Gainesville FL

OOPS, that's a brushless motor. Disregard all of the giberish above.
GAP

jrb
08-02-2005, 03:33 PM
Always thought Mustangs look and fly best with a 4 blader: http://www.rcgroups.com/links/index.php?id=4788 (http://www.rcgroups.com/links/index.php?id=4788) .

canamrichard
08-20-2005, 05:30 PM
I believe that motor would only work with the gearbox for a plane as large as that.

canamrichard
08-20-2005, 05:39 PM
I am currently putting together a Spacewalker II which will weigh around 6.8 lbs with motor and battery. The only thing I felt comfortable with as a direct drive motor is an AXI 4120/18. A gearbox with a MaxCim would also work. I will be using a 5s3p battery and around a 13X8 prop if I go direct. Check with www.espritmodel.com (http://www.espritmodel.com) for good guidance on motor/prop/battery for your plane.

Walt Thyng
08-21-2005, 10:47 PM
Tom's "Y" wind motors are best with a gearbox. The "D" motors are better for direct drive.
WT