Trim Tabs Model 4

[grdev]

I just finished covering my Rudder, stabilizer, and Elevator when it donned on me there isn't any elevator trim tab. I have the Model 4 Kitfox, have any of you installed a trim tab on your plane? Any Ideas?

[Av8r3400]

I have extensively modified my elevator (and rudder) to add a built in tab.

There is a system from Rans (http://www.aircraftspruce.com/catalog/elpages/ranstrimsys.php) that could be retrofitted on the trailing edge.

[HighWing]

The IV was designed to be trimmed by adding a little flap to correct for the typical nose up basic trim. Like you, I notices that and like Larry modified my elevator and rudder for electric trim. The rudder became a test of an idea, but the elevator is the typical tab. I have tooling to make an aluminum tab, mounts for the servo and a servo bubble cover if you decide you want to add a tab. It will require recovering the affected elevator side. Other parts are available at Aircraft Spruce. Send me an email if you decide to add the tab and might need help.

[Olle1975]

Some ideas....

KLICK (http://www.teamkitfox.com/Forums/showthread.php?t=6772&highlight=trim)

Olaf

[cubtractor]

I made this type of system to relieve control pressures. I works great and has enough throw to it that if it quits or runs away, I still have full authority in either direction.

http://www.teamkitfox.com/Forums/picture.php?albumid=273&pictureid=5567

[kitfoxjim]

I have been using RC servos for more than 10 years, first on a Model 2 and more recently on my Model 5. What started as a simple trim system has evolved into a 3 axis autopilot over the years. Using RC servos is quite practical and inexpensive. I will try to attach photos showing rudder, elevator and aileron tabs that I added during my build.

[Norm]

I fly with KitfoxJim and can attest to the fact the servos work well as does the auto-pilot. I will be using a simple RC servo based trim sdystem to my three axis. Wires are to the tail for the Servos and will be to the wing when I get to that stage.

[cubtractor]

I went with the trim system I have because my tail feathers were already covered and I didn't want to redo them. I would rather have trim tabs. If I really wanted an autopilot I would probably go with the new TruTrak Eco.