MAIN GYRO PAGE
Optimizing the performance of the Gyro stabilized airplane control surface
optimization of the performance has a number of factors. All contribute
to how well the control surface is stabilized using a gyro.
slop in your control surface linkage. This is by far the most important
thing you can do. Imagine how hard it would be to drive in a
NASCAR race if your steering system had alot of play in it? Same thing
for a gyro stabilized control surface. Move your control surface
and see how much it moves w/o moving the servo. This is your play.
You want to minimize this the best you can.
Digital Servos. Digital Servos can develop full torque with even
the slightest servo position error. Analog servos, do not do this and
develop more torque the further the position error is. What this
can do is allow the control surface to actually move faster under load
when the position only needs to move a small amount. Do not be fooled
by servo speed specifications. Those specifications are for an unloaded
servo. An loaded Digital servo that is .12 Sec/60degrees will
move faster to the desired position than an Analog servo of the same
specification. Use a servo with good centering. Easy to
say, but hard to determine. Servo Centering is the ability of the servo
to move then come back to the same point. CLICK HERE FOR a review of the Solar Servos
where I show Servo Centering. MOST of the time, you get what you pay
for in Servo centering. Most of the name brand servos center well and
many of the cheaper budget servos don't. Generally within the
same brand, Digital servos will center (especially under load) better
than an analog servo. you will not see specifications for servo
centering very often but personal opinions will count.Use a servo
with more torque than Normal. A servo with more torque specification
will move faster under load than a servo with lower torque
specification of the same speed. Stiff Control surfaces.
The more flex in a control surface, the more flapping around it
will be doing and there will be a slight LAG in the response at higher
air speeds. If you can reinforce the control surface with CF or
Fiberglass strips on foam planes, that is benificial. Stiff
Wing/Elevator/Tail surfaces. A flexable and floppy wing does not aide
in controlability of the control surface. Like a floppy control
surface, all the wing warping will affect the gyro's ability to control
and stabilize. Reinforce wing with CF to make it as reasonably
stiff as possible. Keep in mind, that EPP type wings are designed
for crash worthyness so stiffening it up, may affect it's ability to
bounde back from a rough landing and put more force on the point where
it hits the ground.
With all these factors comming into play, I will say that you should
NOT get too caught up in every little detail. Start with the slop
and choose digital servos if you do not have them already. I say
there is no need to go and rip apart your airplane and use the above
list like a checklist and make every single mod. Go ahead and try
a gyro in rate mode first and if it does not meet your
satisfaction,then one by one (if you like) go ahead and address the
different factors. You may find that with a given plane and it's
charactoristics that changing servos for example, may make no noticable
difference. These are all "factors" that come into play and each
may have significant or insignificant affect on the control changes
that the gyro will have on the performance. Good LUCK!
- When using Clevises, Use the minimum size hole in the horns or servo arms possible w/o causing friction.
- Instead of using Cleveses, use a Ball link setup
- Support control rods so they don't flex. Any flexing can cause a loss of control movement under load.
shorter control rods, During building, are there any options that allow
you to move the servo closer to the control surface w/o affecting C.G?
- Use Carbon Fiber rods instead of Metal, or wrap the metal rods w/ CF to reinforce the stiffness.