old propeller with only 2 bolt holes

[sarah]

I have found an old wooden propeller with only 2 bolt holes. I have read a post on another site talking about Rupp propeller quick fasteners. What is this and does anyone have any pictures? Would a Rupp fit a propeller with only 2 bolt holes? I will try to post pictures soon. Thanks for input.

[sarah]

rupp quick fastener

Link to website referencing 2 bolt propellers and Rupp quick fastener

http://www.theaerodrome.com/forum/ai...propeller.html

[Bob Gardner]

Hello Sarah,

Welcome.

Please post a photo of the prop and its hub. It might equally be something more common such as the prop from a wind driven water pump.

The Rupp hub dates from WW1. It was a German quick release system and is exceptionally rare. I've only ever seen one.

With kind regards,

Bob

[Dave]

As Bob suggests, those are usually from wind generators, typically from California vineyards, like the one in the attachment. They are usually long and and very narrow.

[Dave]

Link to website referencing 2 bolt propellers and Rupp quick fastener

http://www.theaerodrome.com/forum/ai...propeller.html

Sara,

Please read that discussion you've linked to in its entirety. You'll find that the propeller in question actually had 6 bolts holes, 2 of which were used to mount it for display.

The Rupp fastener has no visible holes on the face, but 4 holes drilled part way into the rear of the hub. Here's one that used the Rupp fastener.