• 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).

Pitts -11 Super Stinker Project

barchiola

This space available.
*
Joined
Mar 29, 2008
Messages
791
Reaction score
134
Finally attached two pieces to each other last night after a few months of working to get things moving so it's officially underway. This is my fourth attempt at a biplane project and it's a top two or three bucket list thing for me so I'm going to get it done this time.

In trying to decide what to build I had a few criteria; it has to be buildable from plans, have stock or close to stock power, and it has to have SS ailerons. I've always had something of a you-know-what for the -11 and if I'm only going to build one biplane it seems that that's the one I should build. I'll worry about flying it when the time comes!

Engine choice is pending. πŸ€” The plan is to use the four cylinder Lycoming IO-390 at 210 to 220 hp and the work has already been done to figure out how to make that work but I'm making parts in an order that will let me put off committing to that for as long as possible. A -11 with 220 hp should be somewhere between an S1-T and an S2-S but that's a wild ass guess on my part. I've got an unofficial empty weight goal of under 950 pounds which would be lighter than most S1-T's so we'll see.

Stuff that has happened so far includes lots of CAD drawing to get the ribs plotted and printed for jigs and templating of parts. The rib gussets were laser cut and are ready to go. I also called Rob at Raven aircraft to see if he's still making -11 parts, he isn't, but he had some leftovers which we were able to make a deal on. He had a set of drag wires and some of the wing fittings like the slave strut attach brackets, wing attach fittings for the fuselage and cabane attach points, and some other plate parts for the controls. I also got a good response from an email I sent to the aerobatics list which resulted in being able to buy a full set of laser cut plate parts and two of the four streamlined tail brace wires. I'm also waiting to hear back about aileron hinges and tip bows which would both be very nice to add to the pile of parts.

I hate being told I'm wrong as much as anybody but I appreciate what it does to make the airplane safe! Please don't hesitate to point out where I can be doing things better. :)

For those of you that have already been down this road, there's a thread for -11 owner/builders and a Google Doc spreadsheet for cataloging errors/omissions in the drawings. Here's the link to the thread, the link to the spreadsheet is in the first post.

First rib is a lower wing compression rib. Woo hoo!
1st wing rib 3Nov2020.jpg


Very much looking forward to what lies ahead.
 

cwilliamrose

‍‍‍‍‍‍‍‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ 
Lifetime Supporter
Joined
Nov 10, 2009
Messages
10,185
Reaction score
2,895
Location
SW Florida (94FL)

Latest posts

Top