by RossThomson Sep 28, 2010
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This was printed on a 100x110 plate, rotated 45 degrees, no supports just printed normally. Great design!
Came out a bit sloppy near the bottom of each blade but a bit of sanding will clean it up nicely.

Thanks a million! I printed this on our Prusa Mendel, and it came out fine after some sanding! You saved me nearly a week of waiting for my Towel's prop to come in the mail!

That's great to hear! Glad to be of help.

The 120 mm propeller should fit on MakerBot 100 mm x 100 mm platform if the whole thing is rotated 45 degrees. If someone makes this, I would like to see a photo.

Like Ross Thomson stated print it horizontal for increased strength to resist blade failure from the centrifugal forces. Puts the tension along the strands of plastic instead of across the weaker layers. The boomerang http://www.thingiverse.com/thing:2217 almost always split apart between the layers when it hit concrete.

Boomerang Thing 1
by tc_fea

I wasn't aware of that... I'm very curious of how well it'll print as-is!

I have no doubt you can print it on Rapman, I've heard they're robust printers compared to makerbots...

Looks unprintable without support material...

Try splitting the design into 3 pieces... you can still print the hub in this orientation, but either lay the blades flat or print them vertically. Create a slit in the hub and a tab at the base of the blades and use superglue or plastic welding to join them together.

I printed it and a 0.5 size one this morning on my Rapman 3.1. It works quite well. This is the best way to print it, the blades are curved so printing on their side would involve a very shallow overhang angle. Printing vertically would also not be suitable as they would be very likely to fall over during printing (also the blades would be much more liable to snapping under lateral forces).