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Actually, Gordy, the torque remains the same for a
given surface movement, and the same for lash.....
If you have a 1/2 inch servo arm and a 1/2 inch
control horn (from the pivot point), it's a 1:1 ratio....torque at the surface =
servo torque. Increase or decrease the length of the arms, you get the same
results.
Now if you have a 1/2 inch servo arm and a 1"
control horn, it's a 1:2 ratio....torque at surface=double the servo torque
(minus drag), lash=half lash at servo, but TRAVEL is HALF as much. The
other way around (long servo arm, short surface arm), you get a 2:1 ratio, with
half the torque, double the lash, double the THROW.
With your setup, how can you get 90 degree flap
throw? It's a bitch for me.....
Matt
PS, I like your foam technique, and will use it in
my next ship
<VBG> NOT taken from an RC Soaring Digest
Article.....yet!
----- Original Message -----
Sent: Monday, February 12, 2001 11:18
AM
Subject: [RCSE] How to :Installing Volz
Wing Max servos
In a message dated
2/12/01 2:01:07 AM Eastern Standard Time, [EMAIL PROTECTED]
writes:
I am installing Volz servos in my molded wings and want to
use the included
bracket to make them removable, I have more depth that
I need but no extra
room on the LE side. What are some good ways
to mount the bracket into the
wing?
I cut a
block of Spyder foam or 'colored' foam to fit the hole, I try to sand
the
surface touching the top skin to some what match the curve of the top
skin. Then I mix up some 5 min epoxy and glue the block into the
hole. It
FILLS the hole pretty much up completely.
Then I
set my Dremel router base (the new cheap round one) to the depth of
the
Micro Maxx (since the mount is flush with the bottom of the servo) and
route the foam out to create a nice filler base to glue the Volz mount to.
This helps prevent 'oil canning' of the top skin and put the servos output
arm in perfect geometry to the Surface's control horn.
Always put your link into the 2 hole arm on the servo and one notch
higher on
the surface horn. Never use a longer horn on any
servo. Longer horns
amplify any gear lash and bearing play and skin
movement at the servo and
reduce the servo torque you were so happy to
have paid for.
The longer horn connection on the surface horn adds to
your torque and
reduces lash movement. And always try to get your
servo flush with the
bottom skin when using bottom linkage connections.
Okay ? :-)
(taken from an RC Soaring Digest article, of
course)
Gordy
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