What does an aircraft's size have to do with servo selection?
Required servo torque should be determined by the force required on
the control surface. A small aileron on a slow flying large airplane
can be powered by a very small servo.
A 5125 (or JR equivalent) is perfectly fine for the ailerons or
elevator on Al's 5M Ventus. If two were used on each flap that would
be fine as well. I would think that the rudder would want a little
more than a 5125.
-Ben
Simon Van Leeuwen wrote:
Al, 5125's are not appropriate for such a large aircraft. This is not
the servo's fault.
Albert E. Wedworth wrote:
Hi Guys
I just have to jump in here....
I killed 8 Hitec 5125 servos in my 5 meter Ventas 2 ax thank god it
was on the bench before I got her in the air! After month's of trying
to figure out what was the cause was wire size, connector plugs, bad
solder joints.
I finally changed out all the Hitec wing servos to Airtronics 141
servos and have never had a problem since! I'll never use the 5125
again in any plane I care about or fly hard.
My two cents.
Cheers
Al
----- Original Message ----- From: "Michael Neverdosky"
<[EMAIL PROTECTED]>
To: "Soaring Exchange" <soaring@airage.com>
Sent: Wednesday, December 28, 2005 10:47 AM
Subject: Re: [RCSE] What are you doing to kill 5125/168 servos?
On 12/28/05, Phil Barnes <[EMAIL PROTECTED]> wrote:
----- Original Message -----
From: "Tom Watson" <[EMAIL PROTECTED]>
> what are you guys doing to kill the flat wing servos?
Just ask anybody that attended last June's LISF (Long Island Silent
Flyers)
contest. They will tell you what a Pike Superior SL sounds like when the
ailerons are fluttering so violently that the entire wing is twisting to
very odd angles.
If control surfaces are fluttering NO SERVO is long for this world,
nor wing for that matter.
Fix the flutter!
Lighter surfaces help but the biggest thing is mass ballancing.
When I built a Long-EZ (full size) is was made clear that the control
surfaces MUST ballance in spec or they will flutter with the surface
usually coming off and then other nasty things happening.
At the speeds we are getting I expect to soon be seeing mass
ballancing on surfaces soon.
michael
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