Ultra Stick 40-tried to install wing servos (Hitec stds) and the opening in the wood is too small. How do you enlarge the opening without damaging the ribs or sheeting? Opening seems almost ok from front to back, but is way too small from side to side. Thanks for the help, Mike.

I'm not familiar with the Ultra Stick 40, but it's hard to believe that the rib spacing is closer then the width of a servo ? You're not trying to lay them on their side are you ?

Please describe further ?

Width of servos is greater than the width of the opening in the wood frame of the wing. Length appears 1 or 2/1000 small, but I'm not too worried about that since there is only sheeting at the front and rear of the opening. To either side of the opening, there appears to be a wing rib bordering the hole. That's why I'm asking-don't want to weaken the ribs by doing something wrong! According to the Hitec website, the servos measure 0.80 inch wide-that is the direction I'm having problems with. Hope that makes sense.

Mike,

I had a similiar issue with my Ultra Stick 40. My guess is that the smaller openings will fit the smaller JR servos that are specified in the directions. This is pretty standard of most ARFs that I have built. The manufacturer will size the opening for the smallest usable servo.

I used the Futaba 3003 servo (0.78" width) in the wings and needed to extend both the length and width of the opening. I simply used sandpaper attached to a stiff piece of wood and alot of patience! Actually it didn't take too long and the servos fit perfectly.

In your post you said that the wing rib was bordering the hole. I seem to remember a bit more room. I just went down to my workshop and took a look at my wing. I didn't remove a servo, but it appears that the servo opening is bordered by two wing ribs. The ribs appear to be about 1.5-2" apart therefore you should have enough room to open up the hole width wise.

I guess to make a long story short, I don't remember that being an issue - yes the wing ribs were close but I had enough room to get the servo to fit width wise.

By the way - great flying airplane, you will really love it.

Lawrence

i had to use my dremel to enlarge the opening alittle. five minute job! one side was fine the other tight. i used hitec 425 servos no problem.

I used a wood file to widen the servo openings in my Lanier Edge 540. Took about 30 seconds per side. No ribs nearby (it's foam!)

I just finished an UltraStick 60. Same problem but I needed additional length, not width (Hitec servos). I use a hobby knife and just shaved both ends a little (couldn't get a dremmel tool in there). Sanded when done.

Nothing was really "in the way". I have some JR servos - they fit perfectly.

RSchrock was correct in his approach. All you need to do is increase the length of the opening by about a 1/16" of an inch and it will now support Hitec and Futaba servos. Ipanetta was also correct -- the openings are designed for the standard JR servo which is about 1/16" shorter than Hitec and Futaba.

RSchrock,

I had to do the same thing for my Ultra Stick 60. I went with (4) 425BBs in the wing,a 605BB for the elevator, a 605BB for the rudder, and a 422 for the throttle. What is strange is that my Ultra Stick 120 did not require this modification.