Four Blade Scissors?

[jdupre5762]

I remember seeing photos of a WW1 era aircraft with a four blade propeller with the blades skewed sort of like a partially open scissors. I can't find the photo or any other reference now. Does anyone here know whether this type of prop was used or tested during WW1. I know that a WW2 era biplane flying boat used this design. Also in all likelyhood the prop was made of two separate two blade props mounted offset on the same shaft and not four blades sharing a common hub. Thanks to all.

[Dave]

Certainly in the U.S. there were many designs that consisted of 2 separate 2-blade props stacked to make a 4 blade combination. Some were designed with matched notching in the hub itself, and some (notably the SE 50_0 series for the Liberty engine) were just two thin blades stacked together, without hub notching.

[Bob Gardner]

Yes, there was a WW1 prop as you describe. Welcome to the forum, by the way. I think it was a Siemens-Schuckert. The props were made by Wotan.

With kind regards,

Bob