Model Forum / Radio Controlled / Air Models / August 2007

they will be fine.

Ive used micro servos in 48" stuff.

mjohn@twmi.rr.com wrote in news:5p0rc35cql8927vn6udvqm5snpgjl7f3m8@
4ax.com:

Without going through the math (and sometimes I actually do go through
the math), 36 oz-in should be plenty.  Generally, "standard" servos (like
the S3003) are considered appropriate for .46-sized planes, which usually
weigh 5+ lb with ~1.5 hp.  

For the Superstar EP, it's a 3 lb airplane that's probably underpowered
with the stock motor (compared to a standard .46 trainer).  That would
suggest that 25 oz-in would be sufficient.

Of course, it's better to have a too much servo than to have too little.

Now that I've said all that - standard servos are cheap ($9 at Tower for
Hitec or Cirrus), and the socket in the wing is probably sized for one,
so it may be easier to just go that route.

Beyond all *that* - Might wanna wade through the discussion on RCGroups.  
Here's one of them:  http://www.rcgroups.com/forums/showthread.php?t=
311392

I didn't read through it to see if anyone talks about servo sizing, but
someone probably did.  

Since the thread is a few years old, the brushless motors weren't so
widely available and Li batteries were much more expensive.  Don't know
if you're planning to use the stock power system or not, but . . .