Help! Blowing Direct Drive Tail Motors (CPP)

[ptroy]

If Someone could help me out I would be very greatfull.

My and a couple buddies at work all fly cp pro's. They put the direct drive tail motors on cause they found they are very responsive and produce less vibes.

When I install the motor it burns in minutes. everything else is stock except I have plastic blades and a G90 Installed.There is a heat sink on the motor with the compound.

The strange thing is the stock motor works.

Thanks

[slikrx]

Make sure you have the correct motor:

Mfg Part Number: GW/EDP-50H
Vendor part number: GWSEDP50H

Evidently getting the "non H" version can cause problems.

Also, I think the motor above is designed as a tractor (puller) motor so it needs to be on the opposite side than the stock one...

HERE's A link (http://www.bladecprepair.com/man_tr_dd_conversion.html) that gives a step by step...

[ptroy]

THANKS!

That's a great link. I definatly have the motor on the other side of the boom. the 3 of us will change that.

However, before I go out to buy my 3rd motor I have to take into consideration that It work's the other way just fine for the other 2 guy's.

My motor is heating up and blowing literally in seconds so there has to be another reason.

Any way of testing the output of the 4 in 1? could there be something wrong there?

THANKS

[slikrx]

THANKS!
Any way of testing the output of the 4 in 1? could there be something wrong there?

THANKS
I'm still pretty newbish, so I'm not too sure about the 4 in 1. As I understand it, it's rather binary: either it works or it doesn't.

One other thing to look at though, that could help figure things out:

How is your rudder trim compared to you buddys'?

If you have yours farther over, it COULD mean you have something binding in your head/mainshaft. That would cause more friction, which would need more tail power to compensate.

Is your tail rotor perpendicular to your main rotor? If it's misaligned even slightly, it would make your tail motor have to work harder as well.

What condition is your tail rotor in? A beat up rotor blade could also cause it to work too hard.

I'd verify the part number of the motor is correct... In one of the threads, somone mentioned burning the motors because they had something other than an "H".

I have heard that cutting the tail rotor to a smaller diameter can also help, because it reduces the current draw, and replaces it with higher RPM, which is better.

If you have the time (and patience) I'd dig through the E-Flite pages and look for "DD" in the title of threads. Unfortunately, the search function can't search for 2-letter words, so it won't find any results if you type "DD" in the search term thingie.

Good luck!

[ptroy]

Thanks very much

I'll look into those possibilities and post my results.

[Buzzkill]

Just a thought but I think you could put a resistor inline with the non-H motor to limit the voltage its drawing. I could be wrong?

[Funky]

What size prop are you using with the direct drive? From my experimenting the 3020 is best for longer motor life and it holds great despite the small size.