Sling 4-4-40 Flies After Four-Day Build
A couple days ago I wrote about the Sling 4-4-40 Challenge. I believe this to be of interest for a couple reasons. One is the fast build at an airshow … much like the intense interest surrounding EAA’s One Week Wonder (video) building of a CH-750 at Oshkosh. The other is my promise to offer […]