3D-Printed Folding Prop max. RPM Test

Today, I tested the 8.5 inch blades until they failed. It took an astonishing 1000 Watts and well over 18'000 rpms to destroy them! That's impressive.
Caution: This test was done at room temperature and with fresh PLA. Be aware that the maximum load will decrease significantly over time and at different temperatures!
Here is the tested propeller: www.thingivers...

[@brianbrown6658]

These print very nicely in ABS for me. I think I'm going to resize the hub for a few of my other planes. I appreciate the variations of shaft diameters and blades you have provided. Nice job on the design and thanks for sharing.

[@wordreet]

That was impressive! Are you planning any testing of different materials? I have some carbon fibre PLA which I might try sometime. But my thoughts are that nylon might be stronger. Plus, there's always the option to heat treat/anneal after printing. Some people have had surprisingly good results.

[@christiansprojects-cgmanuf1426]

I have never tested any other materials as this prop design works fine on my planes. It would be interesting for sure. Early RC-model props were made out of nylon so I gues you are right, nylon would be the best choice.

[@wordreet]

@@christiansprojects-cgmanuf1426 Well, certainly for injection moulded parts, but for 3D printing? We'll have to find out.

[@murugesh8321]

hi bro
can you please give suggestion how did you designed these props
for my need, i want to design a 11 inch prop

[@christopherleveck6835]

Any further development on this? I'm thinking about trying to either print an EDF using PETG carbon OR use pla to create a plug to use in a form so I can use regular carbon fiber to make the parts.....

[@christiansprojects-cgmanuf1426]

I have not made any changes to it until now as it is strong enough for my application. I have two planes with this prop, both of them have well over 50 flights now and the prop is doing well. PLA is surprisingly strong and the props does very well at input power of 150-400 Watts.
I have never tried printing an EDF but I don't see any reason why it shouldn't work. In fact, it will be easier to print as the blade angle usually is steeper than on a normal prop. There are some EDF designs on thingiverse and some of them seem to work. This one delivers over 3Kgs of thrust: www.thingiverse.com/thing:2838324

[@Diogo-dt1uf]

Was actually the propeller that broke? It seemed to me that the mount failed!

[@wordreet]

My guess is that the eccentric loads after one blade broke caused the mounting screw threads to fail.

[@christiansprojects-cgmanuf1426]

Yes, it was the prop that broke. The motor mount got torn apart because of the vibrations caused by one missing blade.

[@GhostTraders-rq2hx]

Don't ever put your hand to the side of blades please!

[@NOXFPV]

Was it 100 percent infill?

[@bisopbisopbisop]

lol