> I'm a long time r/c pilot, but new to retracts. I'll be putting a set
> in a Sig King Kobra (going to make it a taildragger, I think), and I
> have a few questions for you folks with experience in this department:
> 1) Which is better overall: mechanical or pnuematic? Which is
> lighter? Wouldn't pnuematic retracts also require a dedicated servo?
All retracts, except some large scale models, require a servo. Air
types can use the cheapest one. Mechanical retracts req2uire a special
servo that costs at least $35 for a cheap one. Weight is very similar,
with air being slightly heavier. One thing to remember is that Spring
Air units are built much more durable than most mechanicals. For ease
of installation and reliability, I choose Spring Air.
> 2) In reading ads, I've come across 90 and 85 degree types. What does
> this angle refer to? Is it the arc of rotation, and if so, in what
> situation would you use each type (I suspect wing dihedral may come
> into play)?
You got it. It is to make up for larger dihedral angles so that the
gear hang straight down without going through the top of the wing when
> 3) Are the less expensive brands such as Hobbico reliable at all?
I have heard far too much negative about them to even consider them. If
you want mechanicals, go with Dave Brown or Supras. For air, I wouldn't
bother with anything but Spring Air. The others are OK, but are more
complicated to set up and if you lose air pressure, you can't get your
> Thanks in advance for any help you folks can give!
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