Here is a rather nice Boorabee for sale here as well...The plans wouldn’t be of any use to you unless you could borrow the moulds, the plans and use of the moulds was free to those people I thought would complete the project. Alas the main 5” tube is no longer available in 6061t6 here in OZ, and I believe it is very hard to get in lengths over 12’ in US. The drawn 40 and 44mm tubes were unavailable here for a long time, but I see you can get them again now - It was an good airplane for its time, I’m too old and tired to provide the builder support needed so no more will be built. You are welcome to any of the ideas.
The tubular mainspar and glass fibre ribs in not my idea, Col Winton and his son Scott (of Facet Opal fame) used this method on may of their designs.
This is awesome information you are passing on. Thank you! Couple of questions--did you sleeve the spars anywhere, how did you work the root spar attachment, are the spar webs pop-riveted with stainless steel pops, and is the fiberglass d-tube leasing edge a significant portion of the wings strength, or is the d cell there to keep torque in check? And did you form the spar webs with a press or a brake? Do they curve around the spar?This method for building wings has been used here in OZ for over 50 years to my knowledge,...
Got it! I built a Sport Hornet and put a Jabiru 2200 on it. The wing would have been difficult and "futzy" to build from scratch. The wing was very strong even without a D-cell. It was a single strut wing and had drag and anti-drag tubes throughout. Your rendition is far more suitable to a home builder.There is no telescopic size for the 40mm tube so I had to turn down some thick wall tube to make the sleeves, there were sleeves wherever a bolt passed through the tubes, at the root, where the strut/compression fitting was bolted through both bottom chord and trailing edge tubes.
3/16” stainless rivets were used.
The Boorabee had 2 struts and the wings were torsionally strong, but the leading edge added considerable extra torsional strength (a belt and braces approach).