i've got a ucd 3d with an os 91 fx for power with the stock muffler with the baffle removed(now runs smoother, and cooler too). however the two servos on the left side get completely fuel covered everytime i fly it. is there anything someone has figured out to keep the servos back there clean?? some fuel got into the tail too. any suggestions?? thanks.
tony

Nope.

Welcome to exposed servos and nitro fuel.

Mine are all greasy too

Fuel Soaked Servos Are Bad OK
Marajuana is Bad!!!! OK

Looks like the designers put the servos in the tail for easy/simple
control linkage installation & balance Or they just took the easy
way out and stuck them back there for lack of a better idea?
They did not plan for the long term effects of Real World Flying,
like grease, oil & dirt getting into your servos!!!
I first saw this problem on the Goldberg 300S Profile & the OK
Models Seduction FunFly Profile Plane. Having a Morris Profile Hots
I know first hand how much oil & dirt gets all over the lower rear
fuse,stab, tailwheel, & rudder while hovering and doing 3D stuff.
My friend Paul has a U Can Do 3-D with a YS .91 and he is having
servo centering problems with a new JR 4131 servo on rudder.
This could be caused by wet electronics.
"WARNING SIGN PAUL"

Solutions:
Sell airplane and buy a Morris Profile; just kidding
Move servos up front and use a Pull-Pull linkage like Morris does!
Make an exhaust deflector out of metal or wood to protect servos,
these could be painted or Monokoted to match plane.
Buy waterproof servos " expensive & not 100% guaranteed"
Seal servo cases with silicone rubber " be careful some silicone
attacks electronics " This info from Pete Waters of Kraft Midwest!
Not recomended & will void radio warranty
Put a small Sig canopy over servo to protect servo & cut a slot for linkage or just
cover the front half only; kinda like the side bubble windows on a
WWII PBY seaplane, you could either glue or screw canopys on.
Buy lots of servos and replace every 4-6 flights
Convert plane to Electric? Yea Right!!!!!!!!!!!
Try turning the muffler so it points up & blows the exhaust on top
of the wing and tail away from the servos.
Don't Worry Be Happy!!!

Good Luck & Hope this helps

Bob

I would try taking a package from a spinner, cutting the clear plastic form out to where it will lay on a flat surface, then cut down from the back of the package towards the point to where it will act as a shield to the servo and then simply glue/fasten it to the side of the plane in front of each servo, I have never tried it but it's an idea that just flashed through my head when I read this thread. Seems like it would work though...

-Kelly

I have put a small deflector that halfway covers the servo and it works great just make it out of scrap balsa and be sure to cut away covering ONLY where the deflector touches to glue it. After it's attached cover with monocote so it seals the edges to the fuse. Takes probably 10 min and has saved my throttle and rudder servo from a ton of crud on my Extra Special.