ELEVATOR CONTROL SYSTEM
Well I'm back from 11 great days at Joe Nall. There were four other Spitfires (3 from Germany) that I got to watch fly and take lots of pictures on how each one did some unique things to their planes.
The control of the elevator is done with a long carbon fiber shaft that has two ball links attached to it.
I personally like to use the SDS carbon fiber tray to hold the servo and use the auxiliary ball bearing pivot to reduce the stresses on the servo gear train.
These are available at SDS Hobbies SKU SACF20111 for $17.29.
I am using Savox Brushless 2270 servos on all of the flying servos. I have had great success on all of my other planes using them and they don't draw a lot of power during the flight. The torque for this servo is 444 oz. inches at 0.12 seconds.
I did learn that the elevator on this Spitfire design is very sensitive and you need a lot of Expo around 65%. On landing about 1mm of down is required when the flaps (really an airbrake) are deployed. Two of the German flyers (who are part of a massive 9 plane war bird flying event at the noontime show) both use some Butterfly in their aerilons during landing. There is no mention of this in the Carf Manual.
Here are the weights of the items added to the Spitfire.
Control Rod with 2 Ball Links 52 grams
Elevator CF tray with Control Horn 32 grams
Servo with Arm and 2 Ball links 80 grams
http://www.sdshobby.com/catalogsearc...SACF2011&cat=0
