Ok, I bought a UCD .46 and was instructed by very intelligent and knowledgeable salesman from Hobby people to get Hitec servos - HS645MG and a HS-525BB for the throttle. The problem is, under applications from the Hitec box, it mentions -60 Helicopters, Gas & Electric cars, and Boats... Nothing about Airplanes! Is this a problem? Please help as I am not sure what to do.. Thanks guys...

copster,

I am very new to the hobby as well. But I have been told that it really doesnt matter what you use for a throttle servo. I personally used a $10 hitec and have not had any problems (so far). I'm sure you want an answer from someone who knows more than I do but that was my 2 cents.

The box's suggested useage isn't really that big a deal.

For aircaft, you want response speed, which may not be as important for boats. Compare the reponse speed ratings with other servos.

I use a "Traxxis" servo that is labeled for RC car use as a rudder servo in some iarcraft. I wanted its power and the strength of its gears. Its response speed is the same as a "standard" servo, so I was not losing speed to gain power.

Generally if a servo is recommended as approptriate for a heli it fine for a fixed wing aircraft. The helis need faster response and more precision than the fixed wing models.

Inexpensive "Standard servos" will work fine in the U-Can-Do... however they will not give the precision needed for competition flying. (and the plane is capable of competition peformance)

Thanks, I appreciate the advice.

Tons of people use the 645MG in airplanes (including me-) they are metal gear (MG) and have over 100 oz. of torque on a std. RX pack (4.8V) they are not known for speed and centering as much as muscle-

I use standards on almost everything though (Fut. 148/3003/3004--Hitec-422/425) If you are relatively new to aerobatics, and you want to try a little 3D, STD servos are fine-

If you want precision and are an advanced flier I would consider the 9202 from Futaba - because it is about 65 oz.(?), and it centers better and is faster-

Hope this helps!
james

Copster the 525 is a bad choice. It is a fine servo but you really do not need a 5pole motor for the throttle. A standard 311 or so would do fine. I am not sure of the other ones. They seem pretty large for the purpose. Try a 635 or a 5475 digital with a 6 volt (5 cell battery pack). i think they would work. You might try the 3-D section here. a post there may bring more answers. Also metal gears wear faster and end up with more slop in them. I would not use them if I could find something else. BTW the 2 I reccomended have the new 'Karbonite" fiber gearsets. They are supposed to be almost as strong as metal gears but last a considerable time longer. Good luck with your UCD.

Mark Shuman

Just like McDonalds will try to force the Super Size Fries on you, I'm sure that the guys at Hobby People are told by management to sell up.

If you're flying a 60 size or smaller sport/trainer, standard servos are fine.

Mark, Thanks for the advice. I went with these servos on the opinion of others that know more than I. Unfortunately, I have already installed them in my plane. Im not done yet with the construction but at this point, Im committed! I wish I went with the digital though. Not sure what the weight of this plane is gonna be, but im thinking its gonna be heavy. I'll let you know how it does when I can get this plane flying... copster

As your skills improve... you WILL see a big difference in the Futaba S-3003 and the S-3004. The only physical difference in the servos is the ball bearing at the output shaft. But that ball bearing makes a large difference in getting rid of control slop. It IS worth paying the extra for the ball bearing servo.

Until your flying improves a great deal you will not notice much if any difference between the least expensive general purpose servos and the high priced digitals. while you are learning, just get the cheapest ones and enjoy.