Ok, where to start (without getting a caution from any of the moderators ?

First, let me say, I'm always interested in your comments and suggestions on how to improve my kits.

Now, Bill is right-on most of the time, he's off just a little on the incidence on the wing. The wing has 0-degrees incidence (trust me on the math here). In fact the engines, stab, and wing are all 0-degrees incidence.

The plane does fly well inverted with a little down-elevator.

Ok now for the Twin-Tail discussion: The picture of the plane shown is indeed a Twin-Air .25 and not the .45 and the plans segment Bill showed is from the Twin-Air .15. Of the four Twin-Airs, only the .15 prototype had drawings for the twin-tail.

I'm attaching two pictures of the linkage used on the twin-tail Twin-Air .25.

To describe the linkage: there is a phenolic arm glued into each rudder in-line with the fin. On one end is a 'Z' bend and the other has a clevis for adjustments. Comming from the servo in the fuse is a control rod to a 90-degree bellcrank. The bellcrank is connected to a short control rod with an 'L' bend and a wheel collar. The 'L' bend goes into the bellcrank and the other end is soldered to the control rod that goes from rudder to rudder.

If there is enough interest in a twin-tail option for the Twin-Air and we can agree on a solid design (with linkages) I'd be more than happy to include it in the kit.


John
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There's Something in the Air