• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $49.99/year or $6.99/month to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction). Annual membership also comes with two BiplaneForum.com decals.

S1 Prop

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.


Well-Known Member
Lifetime Supporter
Aug 18, 2006
Reaction score
I have the opportunity to get hold of a new Colin Walker prop that was made for an S1. 3 Blades, fixed pitch, wooden. Not sure what the diameter and pitch are (72" and 76 degrees, or vice versa)?

The other option is a Twisted Composite from Steve Hill.

I'm not looking at any others to be honest, don't have stomach to budget these $10k-$20k props just yet (Whirlwind, MT, Hartzwell) etc.

I'm trying to find more info on the Colin Walker prop, since the 3 blade fixed pitch is mighty interesting (love the look). I had previously only considered 2 blades, since I had presumed all three blade props were constant speed.

Anyone have info/comments on this prop (incl confirming pitch/diam for the S1)


Edited by: macwolf

Latest posts