Originally posted by cactusflyer
Per Strommen,
Thanks for the information.............that explains a lot!. I've got literally hundreds of pictures of the Viggen. Among these I have three pictures from just about the same angle of a AJ-37, Sf-37 and JA-37 on takeoff. The AJ and SF (early versions) show the ailerons deflecting differently than the elevators. On the JA the are in unison............now I know why! I'm building an AJ, but maybe I'll keep it simple and lighter and just use two elevon servos.
Here's another one for you. I've never seen a picture with the speed brakes deployed. The MW54 is probably a little big for my Viggen. In order to combat residual thrust, I plan to use the speed brakes. I'm just curious as to what they look like deployed.
Regards,
John
Cactus Flyer,
You won't need speed brakes just do a tight turn! The induced drag is very significant with this model and a reasonabl;e amount of throttle work is required if you need to do a tight circuit. But you can land on a sixpence at virtually walking pace. The canrds work well for take off and landing. About 10-15 degrees fro take off and max 45 degreees for landing. you will need quite a lot of down elevator compensation with 45 degrees flap and around half throttle in circuit and still 1/3 on finals (depending on powerplant of course). Put the flaps away if you go deadstick.
I had a Jim Fox df sport model for years and it was great fun and very safe.
I have another one built scale which will have a MW54 should be perfect.