The main reasons I would like to use a DEPS is true elevator
matching.
I find it frustrating to spend hours trying to get the dual elevator
servo's to track precisely the same on my larger planes. Even
with the use of a Hitec programmer I spend many hours working
it out.
I could mount the servo (side mount) inverted under the
rudder servo tray.
The side benefits would be 1 less servo, no servo extentions,
a little less hardware, and a really clean looking installation
without servo's hanging out in the rear.
Someone on this forum compared IMAC and Pattern planes
like Nascar and formula 1.... The DEPS system just seems
more like a formula 1 solution.
I like your idea of the control horns, how tall did you make them?
ORIGINAL: Scott Smith
IMO, the Brio is not a good platform for DEPS. I built the standard kit, and I'm not sure where you would put the servo. The balsa tunnel floor isn't really structural and may be too high. Going aft of the tunnel would be difficult to access.
I’ve done three roaches with DEPS and the Brio with duel servos in the tail. The DEPS always requires trim changes each time out where I haven’t touched the elevator trim on the Brio since the initial flights.
I kept the stock rudder and used 3421SA’s in the tail and did not have any balance issues with an OS140RX up front.
For the horns, I made some from 3/32 ply and laminated with CF. A slot was cut in the elevator using a Dremel cutoff wheel just catching the hard point (this would have been inboard enough for DEPS.) The horn was epoxied in after covering. The main reason I did this was to get the pushrod attach point over the hinge line…it’s a long reach with the top hinge! The whole process worked out so well that this is how I will do all horns in the future. No more MK horns for me.
What do you hope to gain with DEPS?