How tight do I put the motor screws on my P3? do I tighten them as tight as I can or would that cause cracks?
Too tight- particularly if you visually inspect prior to flight.Thanks for the tips. I don't want them to loose but also not to tight. I don't know what would be worse.
Def not as tight as you can get them. Use your thumb, index and middle fingers only and just snug up gently pas the initial grab. A very small drop of loctite on the tip of the screw is a good idea hiwever don’t use any if your not confident you can install the screw without getting it in the plastic shell. Perhaps use a toothpick to put the picture inside the motor mounting boss threads.
You may have noted that I did give a warning with respect to these issues. The trick is to use a very small amount. I have had no problems whatsoever with phantoms or in other similar applications, all is good if you apply a little care and common sense.DO NOT PUT GENERIC LOCTITE ON THE SCREWS!!! IT WILL CRAZE AND CRACK THE PLASTIC, unless you use the very expensive one made for plastic!!!
The stuff left on the screws will bind and hold it good enough. Fumes off the new stuff will cause issues. Been there with motorcycle windshields that break off in the wind.
See the warning at the bottom of the Loctite website link here: Loctite Threadlocker Blue 242 from Loctite Adhesives
"Not recommended for use on plastic parts, particularly thermoplastic materials where stress cracking of the plastic could result."
DO NOT PUT GENERIC LOCTITE ON THE SCREWS!!! IT WILL CRAZE AND CRACK THE PLASTIC, unless you use the very expensive one made for plastic!!!
The stuff left on the screws will bind and hold it good enough. Fumes off the new stuff will cause issues. Been there with motorcycle windshields that break off in the wind.
See the warning at the bottom of the Loctite website link here: Loctite Threadlocker Blue 242 from Loctite Adhesives
"Not recommended for use on plastic parts, particularly thermoplastic materials where stress cracking of the plastic could result."
I did not add any to the screws. I just used what was on them. I hope they are not to tight. I did exactly what you said.You may have noted that I did give a warning with respect to these issues. The trick is to use a very small amount. I have had no problems whatsoever with phantoms or in other similar applications, all is good if you apply a little care and common sense.
I thought about reusing the old screws but thought the same.Yes
If you replaced the shell, it came with new screws, which are ready to use ( lock-tite on screws already ). The same they install at the factory!
Like I stated above, I've never had an issue with them!
Now:
If you are re-using screws , than info above on ( LOCK-TITE ) is VERY useful!
J Dot
Do not over tighten them,
Can cause stress on the motor mounts, screws and shell! They have threadlock on them ( blue spots ) I tighten them lightly until they stop, then give them a little extra bump! I've never had issues!
But I also check them periodically for tightness!
Hope this helps!
J Dot