owensman06

http://www.horizonhobby.com/sport-cu...nology-hbz4480

Voltron

Check the servo arm location on the aileron that is moving the wrong direction. You may just need to change the arms location 180 degrees on the servo to change the travel direction. If you have not made any changes to the radio programming, I would bet that is the problem.

quorneng

From what I can detest from the manual the Sport Cub S with SAFE technology is a 4 channel plane so the ailerons must be on a Y lead (ie both servos connected to the same channel) as channel 5 is used to select the SAFE mode and channel 6 for panic recovery.
Does yours have SAFE?
If your does not have SAFE then one of the aileron servo could be on channel 5 or 6 but it will require the 'dual ail' option to be set on your transmitter.
As AEAJR said it is almost impossible for a servo to reverse itself so most likely something was changed when you transferred the electric over to the new fuselage.

AEAJR

Good point. Did not think of that.

quorneng

For that fault to arise it would mean that you removed an aileron servo arm and put it back the wrong way round. Did this happen?
If you did not take off the arm but it is indeed now the wrong way round it means it has slipped on its spines as a result of the last crash and is no longer secure. That servo must be replaced before you fly again.
Is there any chance of a picture of the underside of the plane showing both aileron servos, theri arms and links?

AEAJR

I don't believe this is the case, but if the servos are on separate channels using an aileron diff mix or a flapperon mix then you could have accidentally reversed one.

policetac

Hello.
I am an absolute beginner to this hobby so a lot of this is brand new to me. Since I don't have a club local to me, my only source for information comes from these forums.

I've got an 60" "Ugly Stick" park model that I'm building from the ground up out of spare parts and dumb luck that is in need of a set of servo's.

Searching the internet for servo's, one thing I've noticed is that many of the servo's being sold are listed as being either "micro" or "mini."

You mentioned at the beginning of your post that you would be discussing size, but unfortunately I think you forgot to cover it.

I've been looking at a set of 5 "Towerpro" MG90S Micro Metal Gear 9g Servo's because they are ball bearing servo's, have the metal gear on them, come with the servo arms, and are relatively inexpensive.

From what I've been hearing, it sounds like I'm going to have a difficult time even getting my plane to fly since it's not any kind of kit or anything and I'm building it out of spare parts and such, so I don't want to spend a lot of money on these, but I do still want to get the right parts for my plane.

Could you please tell me whether or not you think these servo's will work?

Thank you.

JetPlaneFlyer

For a 60" model you need to be looking at larger servos. Look at servos around 40g or more, 9g servos would be far too small and not have enough torque. If there any cutouts or mounting rails installed then probably easiest to get a servo of the correct size to fit the hole, that avoids doing any modifications.

BTW.. a 60" plane isn't really in the 'park flyer' category. Park-Flyer is a term usually used for smaller lightweight planes.

Voltron

Hi Policetac, The link below is for an inexpensive 58 gram standard size, ball bearing, metal gear servo. The Vendor is very reputable. I have done business there for several years with no problems whatsoever. http://www.headsuphobby.com/iFlight-...vo-F-565-B.htm

At $11.95, this servo is less than half the price of a name brand servo. The quality is good, I have never had a quality issue with anything I have purchased at Heads Up Hobby.

fhhuber

Save a lot of time and trouble... especially for your first model:

http://graysonhobby.com/dynam-piper-j3-cub-pnp.html

Pick your radio... Note the radio might last you 10+ years if selected well. Or you can choose an essentially disposable radio . The higher end radios mean a higher startup cost but lower long term cost. The economy radio (such as the Dynam 5 ch at Grayson) can serve your needs and do well but you'll want better later.

policetac

Thank you for the responses.
I've checked out the link provided and I now have a better idea of what I'm dealing with.
I appreciate the help.

AEAJR

Anyone have any tips on servos?

How to size?
How to mount?
how to fix?

birdDog

Tips on servos? Yeah, Jiggle the wires and shake them around while they are powered up and before you install them. Just had a Dymond D60 that jittered out of the box. While powering up pre install to find center and check torque and geartrain, one started moving around on it's own. I could feel it. Low and behold, the signal wire had a cold solder joint where it contacts the board. Easy fix on the bench. Very hard fix in the air.

Check your servos on the bench, fresh out of the box folks.

AEAJR

Has everyone gone to digital servos or are analog servos still popular? I have used digital servos in my competition sailplanes for years but most of my parkflyers still use analog servos.

crxmanpat

Just depends on what comes in the kits I buy. Most are still analog, but the bigger planes seem to be getting digitals these days.

Bdh

I have a few foam eflite planes with A332 just bought to E flight 1.4 commander. one aileron chatters 2/3 seconds. Hobby shop guy said that’s servo just locking in in signal. Flew 5 flights now no problem. Is an analogue servo chatter? Other planes with A332 servos no chatter. Thanks. Bdh

quorneng

Servo chatter can result from hinge or linkage resistance preventing the servo finding the right neutral point. A few flights can free things up a bit so the chatter disappears..