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Model Forum / Radio Controlled / Air Models / March 2006



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Outrunner recommendation for Cessna Skylane EP From WorldModels

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Geekay - 27 Mar 2006 20:36 GMT
Hi,

I had planned for a 3D mini funtana this past weekend but by the time I
got to my LHS the one last piece was sold out. While at the store, I
noticed this beautiful balsa Cessna (41") from World Models and ended
up buying.

The stock motor comes with a 3:1 reduction gearbox and folding
propellers. I want to go outrunner. I have a e-flite 400 outrunner but
can't install that on the cessna because the firewall will only match
the stock motor and gearbox.

Does anyone who owned this model have any recommendation for a
outrunner that will install in this model without having to replace the
firewall? The plane and the firewall is prebuilt and looks very nice
and sturdy. Hate to rip it off to install and new custom firewall for
the outrunner.

Thanks
Tim Wescott - 27 Mar 2006 21:18 GMT
> Hi,
>
[quoted text clipped - 15 lines]
>
> Thanks

Expect to do surgery to change the motor.

With those numbers it will probably be quite the gentle flyer on a speed
400 (I used to fly a geared speed 400 with a 16 ounce model and 42"
wingspan; it was a very nice performer).  I suggest you just fly it on
the motor it comes with for a while; when the cold weather comes you'll
be ready for the performance you'll get from a brushless.

Whatever else, this should be a _much_ better first plane than a 3D
anything.

Signature

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google?  See http://cfaj.freeshell.org/google/

Tim Wescott - 27 Mar 2006 21:21 GMT
>> Hi,
>>
[quoted text clipped - 26 lines]
> Whatever else, this should be a _much_ better first plane than a 3D
> anything.

Oops -- forgot to mention.

It should be quite easy to put in the outrunner, though.  You should
either get one of those back-mounting kits and replace the front of the
motor box with one spaced back the right amount for the motor, or add a
motor box extension and front-mount the motor on it.  It's a fairly easy
job if you're experienced, but you're going to have enough new things to
learn without having to get that right, too.

Signature

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google?  See http://cfaj.freeshell.org/google/

Geekay - 28 Mar 2006 00:51 GMT
Tim,

Thanks for your input. It is easy to do surgery to change the motor and
I can do it. But before doing that I was looking around for some other
alternatives where other folks might have done without surgery.

I do wish to use the stock motor but the flying time is just a little
over 5 minutes (with 2 cell 1250mA lipo) and also the brushed motor
will not last long, I would rather put a outrunner now and save myself
from opening the cowl later.

Currently, I'm thinking about brushless inrunner instead of outrunner
that would match the stock prop. May be another trip to LHS this
evening!!!.

Thanks

> >> Hi,
> >>
[quoted text clipped - 43 lines]
>
> Posting from Google?  See http://cfaj.freeshell.org/google/
The OTHER Kevin in San Diego - 28 Mar 2006 06:50 GMT
>Tim,
>
[quoted text clipped - 10 lines]
>that would match the stock prop. May be another trip to LHS this
>evening!!!.

<$0.02>

Build whatcha got, fly the crap out of it and THEN "upgrade".  That
burshed motor will last quite a while if ya don't throw a bazillion
volts at it.  Pick up a 2 cell LiPo with a higher mAh rating if you
want more flight time per charge, or pick up a bunch more packs and
take several to the field.

5 mins as a newbie is going to seem like forever until you get
comfortable and chances are you're going to crash a few times in the
process - no need risking damage to a nice brushless rig while ya
learn.

</$0.02>
The Natural Philosopher - 28 Mar 2006 09:31 GMT
> Tim,
>
[quoted text clipped - 6 lines]
> will not last long, I would rather put a outrunner now and save myself
> from opening the cowl later.

Well stick a 3 cell 1200 in it, drop the prop to 8 inches, gain 50%
power ,get more motor life, and about half an hours gentle flying.

Speed 400s LOVE 3 cells..as long as you drop the prop to keep the
current in check.
Geekay - 28 Mar 2006 18:35 GMT
Is it 3 cell 1200 mA or 3 cell 2100 mA?

Thanks

> > Tim,
> >
[quoted text clipped - 12 lines]
> Speed 400s LOVE 3 cells..as long as you drop the prop to keep the
> current in check.
The OTHER Kevin in San Diego - 28 Mar 2006 19:57 GMT
>Is it 3 cell 1200 mA or 3 cell 2100 mA?

Depends on the cells it's built with.  All my 3 cell LiPos are of the
1320mA variety (They power foamies and my micro helo)
 
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