HGLCR Aeolus motor threads stripped

[Trial4life42]

Hi everyone,
I've been flying with the HGLRC Rekon 5 Long Range quad since last August, and I loved it.

I've been noticing though that the threads of the motor occasionally would lose some metal particles after removing the props. The motors are the HGLRC Aeolus 3000 KV ("green" version). Today I tried to mount the props, but I noticed that all of the 4 thread holes were stripped... the screws are loose and won't tighten anymore. The only way to mount the prop was to use a longer screw than the default one, but I'm sure that the bottom part of the hole will strip too one day, in the same the top part has already stripped.

I'll have to replace all of the the motors for this stupid quality check issue...

What can I do to prevent the holes from stripping in the future? Do you suggest me to buy different motors, or the same motors but the 1800 KV version ("purple" version), that would fit better with a Lion batteries thanks to the lower current draw?

For me it is absolute non sense that I have to replace a motors after only 6 months, only because of stripped hole on the bell...

Thanks in advice

[Scott_M]

I would contact HGLRC and ask if replacement bells are available. Will be cheaper than complete motors. And when you get them use the longest screw you can to engage all the threads in the bell without going through and rubbing something.
The bells are aluminum and will strip with repeated use or over tightening. Over tightening will be a different torque value with the number of threads engaged. The more threads engaged the longer it will last.

Scott

[hugnosed_bat]

i would suggest to use good quality screws, maybe they didnt match perfectly and stripped out therefor.
contact them and replace the bell only sounds good, maybe they will provide them for free or even a new motorset for free; i would ask about it.

[Scott_M]

i would suggest to use good quality screws, maybe they didnt match perfectly and stripped out

Good suggestion on screw quality. I have seen some really poor fitting screws too. Full length, high quality screws should solve the problem.

Let us know how it goes with HGLRC

Scott

[Trial4life42]

Where can I find these good quality screws?

I'll contact HGLRC for the replacement bells and I'll let you know, but they are not available on their website...

[Scott_M]

I am not sure what kind of vendors you have available to you in Italy. Here in the USA we have a couple of major suppliers that have good quality stuff of every kind. They are Mcmaster-Carr and Grainger 
Even your local hardware store should have quality hardware. It is the stuff that comes from " who knows where" that we have to be careful of.

Scott

[Trial4life42]

I contaced HGLRC more than a week ago and I still didn't receive any feedback. Probably I'll have to replace the motors completely. In your opinion is it better to buy the 3000 KV or the 1800 KV version for Long Range with a full size GoPro?

[kafie1980]

Probably someone who has experience with these motors can chime in and give a better suggestion.

Looking at the motor test charts can help you decide what KV you should consider: https://www.hglrc.com/products/hglrc-aeo...less-motor

If flying light weight LR quad I will prefer a higher KV to be able to fly even 3S/4S versus lower KV that will require 4S/6S. Although more cells gives you slightly more capacity but you suffer from a weight penalty.

[hugnosed_bat]

i dont own one bymyself but my flybuddy.
first of all, the motor and also the reat doesnt match the weight of a fullsize gopro. you can use the recon with a deceased/naked gopro. the recon5 is to focused on low weight benefits to achieve range.

someone might did that anyway xD you might probably find a yt vid for an example?

[Trial4life42]

someone might did that anyway xD you might probably find a yt vid for an example?

The first video I found is this one:


The guy who uploaded the video claims to be able to carry a full size GoPro Hero 8 with no problems. So I thought that a full GoPro without the battery would have been even easier to carry...

This is the edited footage of my flights before the crash:

[hugnosed_bat]

the first vid looks good but its only 3min, ecalc.ch could give an idea how much flighttime and distance it will cost to carry that extraweight.

[MomoBrut]

You can not balance Rekon 5 with full size Gopro in the front. The motors in the front will have hard time doing their job. The Rekon 5 was not designed to carry full size Gopro. The Rekon 6 can do this.

[Trial4life42]

I've figured out that the screws I was using (the default ones found inside the quad box) were M2×6, which was the correct length. In fact, the longer dimension is M2×8, which reaches the end of the bell and the screw head won't tighten properly to the upper part of the propeller. In the last flight I was still able to fly with the longer screw, probably because the prop hole seems to got threaded after several installations and removals of the props.

Do you think that a M2×7 screw will better fit the motors? I'm really scared of this issue, since the threads could easily crack in any moment, resulting in bad crashes and losing the quad. What could be the safest fix for this issue?

[Trial4life42]

One possible solution could be to 3D print one custom spacer for each prop (of about 0.7~0.9 mm of thickness), in order to be able to use the 8 mm screw, and use effectively the entire thread of the hole, while filling that small clearance.

https://imgur.com/huFmo83

Do you think it could work?

[Scott_M]

Yes it could work. If you do I would put the spacer under the prop. It will be softer than the prop and the screws could eat it up.

I would be more inclined to fully thread the hole and use the longer screw. The more thread engagement the better. I have some 16xx motors here on my desk with the same screw arrangement. It looks like there is at least 1.5mm under the threaded hole before a screw would hit anything and my holes are threaded through.
Are yours?  Or are they blind holes ?




Scott