Dave Plumpe wrote:
(top posting fixed)
>
> "Tim Wescott" <tim@[EMAIL PROTECTED]
> wrote in message
> news:UKCdndJpc4-55NDVnZ2dnUVZ_orinZ2d@[EMAIL PROTECTED]
>> I'm contemplating building a model of the Aeronca LA, LB or LC. This
>> critter has a 9:1 aspect ratio and a 70HP engine, so it's more or less
a
>> Cub pretending to be a low-wing s****t plane.
>>
>> I'd be putting an OS MAX .25 in it, or an equivalent electric motor.
For
>> scale-like slow flying, I keep circling back to a 1/6 scale, 4-5 pound
>> aircraft with a 6' wingspan (and about 4 square feet of wing area).
This
>> seems BIG for a .25, yet I know that the SIG 1/6 scale cub comes with a
>> recommended .25-.40 engine range -- and there's something silly about a
>> Cub model flying rings around a big heavy P-51.
>>
>> So, what Cub (or other light plane) models have you flown, how big were
>> they, how heavy were they, what engine did you use, and (most
im****tant)
>> how did you like flying the thing?
>>
>> Thanks in advance.
>>
>> Tim Wescott
>
> Tim-
> I have a 71" SIG 1/6 Cub with about 225 flights on a OS FS26 4-stroke.
> http://plumpe.home.mindspring.com/mair.html
> 3.75 lbs with silk & dope covering (about same weight as Monokote), GWS
mini
> servos (about 1/2oz lighter than standard servos), standard Futaba rcvr
&
> battery. Flies great, even on floats! Most flying is at 1/2 throttle,
but
> I use full throttle for takeoff & getting out of binds. I'd like to
try an
> OS FS20, but the 20 is not as tall and I'd have to cut the cowl some to
> clear the exhaust - and I don't think the FS20 would be a good choice
for
> floats.
>
> If I were to use a 2-stroke, I'd go with a .20 or mild .25. I'd save a
.40
> 2-stroke for the FJ-3, the fighter version of the Cub.
>
> -Dave
>
The OS-Max (pre- LA, FP, QX, whatever) is definitely a mild engine.
It's just a plain-bearing loop-scavanged, cast-iron in steel s****t engine.
So I think I'm set.
FJ-3 -- I like that. I've seen a few of them. When you have to sheet
the wings against flutter, then you know the engine's too big...
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
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