Ok the only crashed I get now are when a prop falls off the quad will in flight. It has cost me two cameras and a good amount of embarrassment. It only happens once every 15 flights but I hate it. So has anyone ever super glued the collet prop ad pater to there motor? It seems even if the motor goes bad at some point a new motor comes with a new collet adapter.
Everyone should be using reverse threaded prop mounts for the reverse rotating props.
With one hand twist the motor in it's direction of rotation, with your other hold the leading edge of the prop to represent the drag imposed on it by the air. If this action loosens the prop mount nut then you need to put reverse threaded mounts on that motor.
I have used "Lock-Tite" BLUE. It works.
I think reverse thread is a MUCH BETTER idea.
That's the way ALL saw blades are mounted !
That helps but a properly attached prop adapter should work fine regardless of direction. I had issues with props coming loose until using a little bit of Loctite on the nut (the blue kind).
I didn't mean to sound so bossy with that first sentence, sorry.
What I meant was-
Everybody should think about trying reverse threaded prop mounts on half of your motors. It will make your life much easier. Just tighten them a reasonable mount, no need to risk over tightening aluminum threads.
Threadlock works, but I like to remove my props all the time.
A correctly sized collet-based propellor mount, properly installed, should not come off under normal operation (or even a crash).
I think part of the burst in 'loose prop' posts may be due to:
Using reverse threaded collets will mitigate the rotational forces on the nut BUT will not fix a badly sized (or fabricated) adapter or installation. When installing the device, you are doing two things; compressing the propellor hub and compressing the collet on the motor shaft.
In a few days I will have a cross-sectional graphic of a typical prop adapter finished. I could not find one to reference to so...in true DIY spirit, I am making one to share. I have been tempted to machine one to a cross-section for the show-and-tell as I could not find a picture of one done that way either.
I hope to illustrate where these devices can go wrong and try to raise the understanding of how they are supposed to work.
The basic machine part has been around since before WW2 so... it was around before Rocket Science became a term.
Agreed R.D. IMHO the only issue here is whether the collet adapter is the correct size for the motor shaft.
If it isn't correct no amount of screwing down, whether reverse threaded or not, will secure the adapter onto the motor shaft. It could even be that using loctite might, in some instances, glue an incorrectly sized adapter onto the shaft without the splined collet actually biting mechanically onto the shaft, hence causing a potential failure.
Just my two pennies worth.
And the DJI motor shafts are no longer than necessary to seat the prop - less chance of prop wobble compared to long motor shafts, where the prop sits 10-20 mm above the rest of the motor.
There are a number of options available there for the standard 3dr motors collets, but I wouldn't use super glue. Nail varnish works a treat for most applications, or use the blue loctite.
However, I have upgraded all my collets/prop adapters and the problems pretty much disappeared.
I'm looking at changing my motors (for a number of reasons) to Tiger - who have CW and CCW nuts. Check out: http://www.rctigermotor.com/list.php?catid=55
I use blue locktite and the types of prop adapters that screw onto the motor with a few screws. Impossible to come off.