There are other variables at play. The ease of move can be affected by smoothness of the surface of the props and the internal surface of the fork where the prop goes to. Tiny amount in any of such variation or tiny burr on the internal edge or a bit of finger grease can change the equation. And from experience the force required to move the prop in the fork can vary with angle too. So, what I am trying to say is that feel might be in this instance more reliable indicator of the proper screw tightness than the torque applied to the screw. The same torque might not necessarely result in the same stiffness of the prop in the fork. The only scientific approach would be to measure the force required to move the prop at a specific distance from the pivot screw. But that is a another thing altogether....
I suspect the reason for not providing the torque value is what I said before. Too many variables. And a new props might require less torque and as the friction points/surfaces wear out they might require a bit more torque to achieve the same stiffness. Also with the late ESC systems applying braking force to motors rather than freewheeling them, it increases the likelihood of out of balance props during those rapid RPM changes and thus increased likelihood of induced vibrations. IMHO the folding props in general are simply not worth the hassle.The props have 2 teflon washers that act as sliding surface, but yes I agree it would be best to measure at a specific distance from the pivot point. But barring that, the use of a calibrated torque driver works quite nicely, I have used it and it works. Given the fact that the manufacturer are delivering the props with a specific torque already set (although it is to tight) I think it should be fine. What I am after is a torque value that they recommend, so far no sign of response.
Thanks I already looked at some on Amazon and found one that’ll work.Phil, look for a tool that has the range of 5 - 60 cN.m, anything larger would probably not have the accuracy for this size of screws and torque. I can tell you that the props come from manufacturer set to 50 cN.m
Thanks I already looked at some on Amazon and found one that’ll work.
Sadly I don’t know how to post the link on here but if you go to Amazon and type in “miniature torque wrench” several will pop up for you to look at. Sorry I tried to do it but couldn’t figure it out.Could you post the link Mr. Phil
Sadly I don’t know how to post the link on here but if you go to Amazon and type in “miniature torque wrench” several will pop up for you to look at. Sorry I tried to do it but couldn’t figure it out.
Paste this in the Amazon finder:I use to post links that came out several pages long, @The Editor would edit them, then he stopped baby sitting me and I figured out.
Ya know what they say, opinions are everywhere, everybody’s got one. Just saying that I use them and have never had a problem and the ease of deployment is far greater than $$$$. And as long as I inspect them before and after each flight I feel very comfortable and confident using them."similar issues" as for ALL CF props there is an issue with a slight chip/crack, even small rocks/pebbles that hit the prop (and they will)
go unnoticed. High RPMs - and prop will shatter like a bomb! If you have the budget, replace them ASAP when found @ $$$ each.
@ say $10 the plastic props have NEVER failed me, never! The performance of the CF is very minimal compared to the plastic props, tho the ego of having them on the bird is another story.
I'll take the plastic props any day of the week and place the saved funds in my righthand pocket! That's just me...and there is no way I would place those remaining props back on the bird. Stress cracks, a chip, you name it! Nope-nada-no way! As I'm looking at the pic, this could have been the Oh-Sh*t of the motor mounting issuse that's been plaguing the i2 also.
Thanks for your input Sancap! As always!Full Disclosure here, I am affiliated with Florida Drone Supply but still post independently as Sancap. That being said I have been a member on these forums since 2013, long before Florida Drone Supply came onto the scene. Since I joined I have posted my opinions based on knowledge and experience.
I was part of the presales testing of the T-Motor props going back to mid summer of 2017 working closely with T-Motor while we found the best design for the Inspire 2. I have used them extensively since then without any type of failure. I can safely say that I have at least 200 hours on them. I complete a very close inspection of them before flights looking for any type of nick or defect on the complete prop and hub as I do with any prop.
I will continue to use them and monitor them for any defects.
I understand your quandary about going back to using stock props. They are a huge time constraint especially when you’re having to get ready quickly for your upcoming shoot. If I were you I would order another set of the Tmotor props from Florida Drone Supply and I’m sure they would be able to get them to you in no time. I have been dealing with them for quite awhile and they’ve always been timely with their response times. Good luck on your upcoming work.Thanks everyone for your feedback here. I’m glad it *seems* to be an isolated issue and I’m hoping it stemmed from something avoidable, like damage sustained during transport instead of a manufacturing defect or failure due to the load.
I’m conflicted as I have a full quick launch setup based around the folding props for my 2 weeks flying at burning man. The time lost going back to regular props is significant.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?