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1.75in 3 blade prop spinner

by odie_wan, published

1.75in 3 blade prop spinner by odie_wan May 31, 2012

Description

1.75in diam x 2.5in tall spinner for a Master Air Screw 6x4 3 blade prop. The base has a "fan" in the skirt to help with cooling. This was made for a Hobby King 750mm GB R3 but can be used for whatever.It's designed for a 5mm prop adapter main shaft.

Recent Comments

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UPDATE: I revised the spinner and base for the 3 bladed, normal rotation version. Made it a bit lighter. Should be less than 13gr. Also I flew the latest version (v5/v2base) today and it works nice.(See default pic)

UPDATE: Since it seems like this is popular item, I decided to update it with other configurations. I made a 2 blade version as well as a 2 bladed counter rotating version.The base has a CR version as well. I will post a 3 blade CR version soon.

Thanks for the advice. I am waiting for a new extruder from Makerbot... I wore mine out on the Replicator 2... when I get it set up I'm going to print on for testing on a gas engine. Let me know if you have anyone test it on a glow engine.

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Instructions

Print out base and spinner. Thread the base for M2.5 x .45mm threads. Use M2.5 x 10mm or 12mm to screw it together.

Comments

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odie_wan on Feb 10, 2013 said:

UPDATE: I revised the spinner and base for the 3 bladed, normal rotation version. Made it a bit lighter. Should be less than 13gr. Also I flew the latest version (v5/v2base) today and it works nice.(See default pic)

odie_wan on Feb 3, 2013 said:

UPDATE: Since it seems like this is popular item, I decided to update it with other configurations. I made a 2 blade version as well as a 2 bladed counter rotating version.The base has a CR version as well. I will post a 3 blade CR version soon.

pilotjunky on Jan 8, 2013 said:

Do you know of anyone running a printed spinner on a gas engine? Your success proves the material will handle the forces and can be balanced, but I worry about heat. We are building a 134" Lancaster with 4 15cc engines and I have printed some scale spinners but have not had the chance to test whether they can take the stresses or not.

odie_wan on Jan 8, 2013 said:

The spinner would have to get up towards 200C (392F) for you to have to worry. But there are a lot of gas motors that run plastic spinners. I think it should be fine. If the engine was set up as a pusher, that might be an issue as the hot air from the cooling fins would flow over the prop. But in a typical tractor prop arrangement, the spinner will have lots of air flowing over it. I think you should be fine. But I might be able to convince some nitro guys at my flying field to use one of my spinners just to be sure.The think I might worry about is using a starter on the spinner.

odie_wan on Jun 3, 2012 said:

Made some tweaks to the spinner and base. The little fan features in the base seem to be too small for the Replicator, so I made them bigger. I also thinned out the spinner and added some ventilation/lightening holes. The newest version fits together well.

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