Hobby Zone Super Cub

[nolan]

I have a HZ Super Cub LP, after numerous hard and crash landings the motor and gear box had to be replaced. When bench testing the new motor it ran backwards, I thought reversing the black and red wires from the motor would change the direction but I think it fried the ESC. The motor ran in the right directions but at full speed and I could smell something frying. Now ever time the battery is plugged in, with or without the transmitter the motor runs at max with no changing speed using the transmitter. I ordered a new ESC but I'm not sure it will run the motor in the right direction. I did read that using too big of a prop may draw too much amperage and that the ESC could fry, I had a 10x4.5 R on because my 9x6 props were bent up pretty bad. Did the reversing of wires or using too big a prop fry the ESC? Any suggestions other than trashing the Cub would be appreciated.

[sham]

The ESC are fragile at best, sounds like it was fried because of the prop change and that caused the motor to run backwards - your attempt to correct killed it totally.

I would expect normal behaviour with a new ESC, but remove the prop for safety before testing.

[hghost]

The Super Cub will work with a 10 X 8 Prop when one uses floats, so I do not think the prop was an issue

If you hooked the motor up backwards you had it turn the wrong way , you probably burned out the ESC /RX Unit perhaps

but as Sham said you should never leave your prop on when testing the motor

but if it has been crashed several times, there may have been more of an issue then you knew and the
backward wiring probably finished it off.

The wires on the motor are color coded...you should have made a note of how they were wired before you removed them

I have read where many people have re-wired motors because they turned the wrong way and they never lost a ESC...
( happens a lot when people build quads for instance )...a simple changing the wires fixes the motor turning the wrong way,
and does not burn out a ESC.

the Super Cub ESC/RX unit is not that great as Sham stated, but i still believe you already had an issue to start with
and then it showed up more so with the wiring mistake.

Just my opinion

Ed.

[flydiver]

[R] means a reverse prop, one that is designed to give forward thrust when running the opposite direction from normal. They are primarily used with multi-prop planes to counteract torque so not all motors are running in the same direction.
I suggest you dump it and get a 'normal' prop.
If you had been useing bent and/or out of balance props you were creating additional stress on the motor. Prop breakage, bent prop shafts, and broken gearboxes and firewalls are extremely common when learning. Sometimes I went home because I was out of props, not out of batteries. Now I seldom break a prop and have a whole box of replacements since I would stock up on them.

Brushed motors are 'timed' to optimize function. When run in reverse you may not only negate but compromise this. Hard to tell if this was THE issue, but probably not.
Brushless motors do not have this issue as the ESC does the timing either direction.

Likely you just crashed it too many times. The ESC will burn out VERY FAST if the throttle is still on and the prop is stopped, which often happens to newbies in a crash situation. It creates a dead short across the motor. Kill the throttle immediately!

[hghost]

You know I never noticed the "R" in that post ??.....