Originally Posted by
Joseph Frost
Hello 3D print specialists, this is not my department but I find very difficult to buy certain size props, in this case extremely light (2-3 grams) at some 9 to 10 inch diam. with very low pitch like 2.3 to 2.8 as an examples. for micro light scratch build very slow flying models (100 to 150 grams AUW).
Just wondering if it could be made by 3D print for practical/reliable use?
Re-shaped modified props, still too heavy for my like as a sample.
I missed that under your photo. Any 3D printed prop will weigh much more than those. Separate blades on a hub even more. A random 6" injected molded prop I measured at the tip was .6mm. That's one 3D printed layer. It would easily break. The first pair I printed in the photo were stronger than I expected but wouldn't be suitable for high power or high RPM. Printed lengthwise they would be much stronger. I'm working that. I also ordered the ASA filament used in the wind turbine. It's supposedly more durable. I think they used a heated enclosure but their parts were very nice.
You mention a 2.3 to 2.8 pitch. The 10" prop below the root AOI is 22° and the tip 10°. Aircraft propellers are measured in inches of forward motion per one revolution. I think model propellers are the same. It looks to be 10 X 4. A pretty fine pitch. It's held together with two pins not shown.
The problem