ready to go out to the park, but...

[Trevor Harris]

my HK radio is only successfully controlling elevons, not the motor. Battery is fully charged and motor worked the other day. Any thoughts to get the motor working again?

trevor

[mrex]

Is the ESC making a steady beeping noise? If so, unplug the li-poly
and turn off the transmitter. Remove the propeller. Put the throttle
on the transmitter all the way up. Plug in the li-poly, then turn on
the transmitter. The ESC should beep twice, immediately pull the
throttle all the way down. Then move it up a little and verify the
motor responds.

Watch the second video on this page at about 8:00 minutes into it:

http://brooklynaerodrome.wordpress.com/2010/09/27/how-to-make-a-deck-for-a-towel-rc-plane/

I've had to do this once or twice after binding my transmitter...

[Lou Klepner]

when I start my motor with the prop attached it spins fine at low speeds but as I turn up the throttle, about halfway, the motor conks out and stops spinning.

If I remove the prop the motor has no problem spinning up to its height speeds. Have I crashed this motor one too many times?

Also, I ran out of small black bands that came with the prop saver and have been using larger rubber bands folded over several times. This seemed to work fine for a little while but the motor failed. Admittedly there were a few changes in between. I wonder if this is related..?

lou

[Trevor Harris]

Thanks! That did the trick!
Appreciations!

Trevor Harris
Logistics & Facilities Manager
New York City Outward Bound

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[Trevor Harris]

You can get o-rings at most hardware stores. They'll have a variety of sizes.
T

Trevor Harris
Logistics & Facilities Manager
New York City Outward Bound

[placebo]

On Sun, Sep 25, 2011 at 2:20 PM, Lou Klepner <lkle...@gmail.com> wrote:
> when I start my motor with the prop attached it spins fine at low speeds but as I turn up the throttle, about halfway, the motor conks out and stops spinning.

Could be a bunch of things. If you advance the throttle slowly with the prop on
can you get full power?

Other things might be a bad solder joint--can you check the motor for
continuity, any
pair of the two leads from the three should be connected.

How hard has it been crashed?

I have spares in Williamsburg.

Breck

>
> If I remove the prop the motor has no problem spinning up to its height speeds. Have I crashed this motor one too many times?
>
> Also, I ran out of small black bands that came with the prop saver and have been using larger rubber bands folded over several times. This seemed to work fine for a little while but the motor failed. Admittedly there were a few changes in between. I wonder if this is related..?
>
> lou
>

[Lou Klepner]

thanks for the tip on the o-rings.

>> when I start my motor with the prop attached it spins fine at low speeds but as I turn up the throttle, about halfway, the motor conks out and stops spinning.
>
> Could be a bunch of things. If you advance the throttle slowly with the prop on
> can you get full power?

Unfortunately not. It cuts out about halfway up regardless of how slowly its raised.

> Other things might be a bad solder joint--can you check the motor for
> continuity, any
> pair of the two leads from the three should be connected.

Ahh, good to know. I'll check and report back. It seems like it might be losing power when it starts vibrating too much..?

> How hard has it been crashed?

Oh yeah - several direct impacts in fact. The motor mount ripped out of the deck and deck itself cracked at one point. The motor seemed to be holding like a champ until I moved it onto its new deck and it began to fail.

> I have spares in Williamsburg.

Any chance you (and others) might be open/interested in doing a build/fly session next weekend? Maybe sunday afternoon?

- l

[placebo]

>>
>> Could be a bunch of things. If you advance the throttle slowly with the prop on
>> can you get full power?
>
> Unfortunately not. It cuts out about halfway up regardless of how slowly its raised.
>
>> Other things might be a bad solder joint--can you check the motor for
>> continuity, any
>> pair of the two leads from the three should be connected.
>
> Ahh, good to know. I'll check and report back. It seems like it might be losing power when it starts vibrating too much..?

Why is it vibrating? Bent shaft? Off balance prop?

Is the prop saver on tight?

>
>> How hard has it been crashed?
>
> Oh yeah - several direct impacts in fact. The motor mount ripped out of the deck and deck itself cracked at one point. The motor seemed to be holding like a champ until I moved it onto its new deck and it began to fail.

Hmm, I am thinking bad solder joint or the like. Try moving the wires
around a bit while you spool it up.

>
>
>> I have spares in Williamsburg.
>
> Any chance you (and others) might be open/interested in doing a build/fly session next weekend? Maybe sunday afternoon?

I'd like to but generally one can't fly Sunday afternoon in McCarren
park because of crowds.
Moving house Friday so not likely to happen in any case.

Breck

>
> - l

[Lou Klepner]

On Sep 25, 2011, at 6:48 PM, placebo wrote:

>>> Could be a bunch of things. If you advance the throttle slowly with the prop on
>>> can you get full power?
>>
>> Unfortunately not. It cuts out about halfway up regardless of how slowly its raised.
>>
>>> Other things might be a bad solder joint--can you check the motor for
>>> continuity, any
>>> pair of the two leads from the three should be connected.
>>
>> Ahh, good to know. I'll check and report back. It seems like it might be losing power when it starts vibrating too much..?
>
> Why is it vibrating? Bent shaft? Off balance prop?

Shaft is bit bent. Tried bending it back using a needle nose plyers but didn't have much luck. Prop might also be off-balance because of the long-ish rubber band crisscrossed back and forth. The band hadn't' been a problem earlier but maybe its too much coupled with the bend shaft?

> Is the prop saver on tight?

It its. It loosened up on occasion but tightening the screws has tended to work.

>>
>>> How hard has it been crashed?
>>
>> Oh yeah - several direct impacts in fact. The motor mount ripped out of the deck and deck itself cracked at one point. The motor seemed to be holding like a champ until I moved it onto its new deck and it began to fail.
>
> Hmm, I am thinking bad solder joint or the like. Try moving the wires
> around a bit while you spool it up.

I can move the wires w/o having it conk out.

>>> I have spares in Williamsburg.
>>
>> Any chance you (and others) might be open/interested in doing a build/fly session next weekend? Maybe sunday afternoon?
>
> I'd like to but generally one can't fly Sunday afternoon in McCarren
> park because of crowds.
> Moving house Friday so not likely to happen in any case.

Hmmm. Maybe a weekend morning sometime in the coming weeks? Weeknights are tough on my end.

lou

[placebo]

>>> Ahh, good to know. I'll check and report back. It seems like it might be losing power when it starts vibrating too much..?
>>
>> Why is it vibrating? Bent shaft? Off balance prop?
>
> Shaft is bit bent. Tried bending it back using a needle nose plyers but didn't have much luck. Prop might also be off-balance because of the long-ish rubber band crisscrossed back and forth. The band hadn't' been a problem earlier but maybe its too much coupled with the bend shaft?
>

Bent shaft not good, rubber band is not likely part of the vibration.

>> Hmm, I am thinking bad solder joint or the like. Try moving the wires
>> around a bit while you spool it up.
>
> I can move the wires w/o having it conk out.

So you can get full power with the motor wires in a different
position? That is your
problem then. Check for continuity and fix the bad solder joints or
whatever is causing
the lack of current.

>

>
> Hmmm. Maybe a weekend morning sometime in the coming weeks? Weeknights are tough on my end.
>
> lou

We will see. I am moving 2 blocks from the studio so should be more
feasible then.

Breck

[Trevor Harris]

Great fun bit of flying with my son at south end of Flushing Meadow Park. Two batteries and the front of the towel looks like a great white after trying for an hour to get the guy in the shark cage.

t

[mrex]

XLENT!!!

I'm glad I could help, and I plan to fly Flushing Meadow Park soon.
Any pix?

On Sep 25, 8:27 pm, Trevor Harris <trev...@gmail.com> wrote:
> Great fun bit of flying with my son at south end of Flushing Meadow Park.
> Two batteries and the front of the towel looks like a great white after
> trying for an hour to get the guy in the shark cage.
> t
>

[mrex]

Hate to say it but...

I think you bent the motor on hard crash. These things are tightly
aligned and made out of hard metal. If, after a crash, the motor
wobbles, or doesn't spin true, its bent, and could easily hit the
magnets on the outer shell at high speed. At which point it would
seize instantly.

I might be wrong, but that's what it sounds like.

[Splinter Mathwood]

BTW, I am totally impressed that you bent the shaft on a landing. That is pretty hard to do. Good job!

Splinter

--

[Jamie Lawrence]

On Sep 25, 2011, at 11:23 PM, Splinter Mathwood wrote:

> BTW, I am totally impressed that you bent the shaft on a landing. That is pretty hard to do. Good job!

It isn't that hard, but it does take some effort. I have killed two, so far, that way, but I'm probably special.

Hippies in Ohio are rocking planes, and I'm moving to SF soon.

-j

[Mark Harder]

pictures please....

-j

--

[Trevor Harris]

We forgot to take the camera. (too embarrassing, anyhow as a first time flyer). The guys playing football nearby had a few good laughs! Next time, we'll document. We'll go in the morning when the wind is a little more settled, too.

[Jim Carroll]

On Sun, Sep 25, 2011 at 2:20 PM, Lou Klepner <lkle...@gmail.com> wrote:

> when I start my motor with the prop attached it spins fine at low speeds but as I turn up the throttle, about halfway, the motor conks out and stops spinning.

This happened to me once when I was using an 80A esc, where I should
have been using a 30A. If I put the throttle too high, it would make
a screech... The ESC might have a 'timing mode' setting... try a
higher timing. (try all three settings just to be sure.)

[Jim Carroll]

On Mon, Sep 26, 2011 at 10:29 AM, Jim Carroll <j...@maplesong.com> wrote:
> On Sun, Sep 25, 2011 at 2:20 PM, Lou Klepner <lkle...@gmail.com> wrote:
>> when I start my motor with the prop attached it spins fine at low speeds but as I turn up the throttle, about halfway, the motor conks out and stops spinning.

There's some other people mulling other similar problems here:
http://fpvlab.com/forums/showthread.php?292-Motor-ESC-and-Prop-choices-for-the-key-FPV-plane-models&p=26188#post26188