The Twinny was a kit offered by Svenson, now discontinued for many years. The original kit had metric wood sizes but my short kit is cut for American wood sizes. Wing leading edges are 1/4″ balsa. Bottom wing trailing edge is 1.5″ x 1/2″ trailing edge stock. Lite ply is used for the aft fuselage formers and the cockpit floor.
This short kit has a few deviations from the plan to make it easier to build.
- The chin floor is made from a piece of 1/16″ plywood. You also get a piece of 1/8″ plywood that goes inside the floor just in front of the bottom wing. Drill through the bulkhead into the wing for the wing mounting dowel, then put the 1/16″ ply floor on, then epoxy the 1/8″ ply reinforcement inside the floor. Now you have a strong floor for mounting your landing gear.
- The fuselage sides are cut off at the front of the fuselage, and 1/4″ balsa cowl sides are included. Fill the space between the cowl sides below the engine with a balsa block.
- You get your choice of standard cabane struts as shown on the plan for rubber bands, or optional cabanes for a bolt-on wing. The optional cabanes come with two layers of 1/8″ plywood as a floor for the top wing to sit on. The top wing is bolted into this floor.