 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / Radio Controlled / Air Models / May 2004Servo adjustment question
Hi, I'm attaching my servos to the control surfaces on my glider. There is a servo in front of each aileron and a single servo connected to both elevators on the vtail. The directions for this plane (OK Models, Caloway) are very sparse. For servo adjustments, they specify "Up" with "High" and "Low" values in millimeters, and "Down" with "High" and "Low" values. Could someone please explain what the high and low values mean? Regards, MB They refer to the amount of up and down movement on the control surfaces from the neutral position. There is usually more 'up' than 'down' to prevent adverse yaw. In other words up right aileron banks the aircraft to the right and induces more drag on that wing than the left wing giving a tendency to yaw with the turn, making it more balanced and less likely to loose height. CM > Hi, > [quoted text clipped - 10 lines] > > MB Sounds like the manufacturer is giving a range of movement that is acceptable, like the "Up" movement can have a maximum ("High") movement or a minimum movement ("Low") value. If so it would be something like Right Aileron Up High 7mm Low 5mm This is the same as 6mm plus or minus 1mm Some aircraft and servos will give different amounts of movement, but as long as the movement is within specification, it should be OK. This allows for variation in the way the model is made and the way it is put together. Some of this is their manufacturing variation, and some of it is due to different people putting the kit together. Hope this helps, Peter > They refer to the amount of up and down movement on the control surfaces > from the neutral position. There is usually more 'up' than 'down' to prevent [quoted text clipped - 21 lines] > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.686 / Virus Database: 447 - Release Date: 14/05/04 The values are control surface movement from neutral as measured at the trailing edge of the surface. The HI and LOW are one of two things. Either a range (minimum to maximum) in which total travel should fall. Or the suggested settings for dual rates on that control. If you don't have dual rates, then set the initial throw somewhere in the middle of the two and work from there. > Hi, > [quoted text clipped - 10 lines] > > MB The high rates will have more aileron travel in mm than low rates and vice versa. The high rate is usually the maximum amount of control surface recommended for the model with the low rate being the least amount of travel recommended. If you have a computer radio you can program both rates in and flip a switch to change em when you wish. If you do not, I would set the throws to the low rate and work up from there as you gain experience with the plane. The rates can be adjusted manually by moving the pushrods on the servo horn and control surface horn. Out on the servo horns and in on the control surface horns will increase the amount of travel (high rate). In on the servohorns and out on the control surface horns will decrease the amount of travel (low rate).  SignatureFubar of The HillPeople AMA605992 KE6ERB http://www.fubar1.net "I've heard the screams of the vegetables." > Hi, > [quoted text clipped - 10 lines] > > MB Thanks! So High/Low refer to maximum and minimum travel range respectively. I have a computer radio, so I guess I can program in these two ranges. Regards, MB |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.