Sig Smith Miniplane CG
Gary Berg
I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
from a friend of mine. He didn't have the plans for it any more. Is
there some kind soul out there with one who could tell me just where
the CG is supposed to be?
Thanks, Gary
--
----------------------------------------------------------
* Gary Berg Yakima, Washington, USA *
* gb...@wolfenet.com *
* Opinions expressed here are mine. You can't have them. *
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Thomas Bjurman
--
Sorry, I don't have information about the CG but I really like to
hear comments from all of you who has built or flown this model.
I'm thinking of buying the kit myself.
Thanks,
/Thomas
---
Thomas Bjurman (thomas....@sa.erisoft.se) Phone +46 910731212
Erisoft AB, S-932 83 Skelleftea, SWEDEN Fax: +46 910731099
Mark Kriz
Gary Berg wrote:
>
> I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
> from a friend of mine. He didn't have the plans for it any more. Is
> there some kind soul out there with one who could tell me just where
> the CG is supposed to be?
>
> Thanks, Gary
>
> --
> ----------------------------------------------------------
> * Gary Berg Yakima, Washington, USA *
> * gb...@wolfenet.com *
> * Opinions expressed here are mine. You can't have them. *
> ----------------------------------------------------------
OK, the Smith Miniplane. The balancing point is about 3/16 of an inch
back from the front of the bottom wing. I balanced mine there, and it
fies great!!! I have an OS .40 SF ABC on the front of it, and it does
OK, would be more interesting with a good .46 on it.
I'm assuming you also need the control surface throws. They are:
Rudder: 1 inch left, and 1 inch right
Elevator: 5/8 inch up, and 5/8 inch down
Ailerons: 1/2 inch up, and 1/2 inch down
I put some down thrust on the engine because the plane tends to climb on
full trottle; this seemed to help stop this. The plans do not call for
it though.
Hope this helps. If you need anymore information let me know.
Mark Kriz, S.J.
Bob Smith
Thomas Bjurman wrote:
>
> Gary Berg wrote:
> >
> > I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
> > from a friend of mine. He didn't have the plans for it any more. Is
> > there some kind soul out there with one who could tell me just where
> > the CG is supposed to be?
> >
>
> hear comments from all of you who has built or flown this model.
> I'm thinking of buying the kit myself.
>
I have built, but not flown, this plane (still working on those flying
skills!). A guy at a club I used to belong to had one and it flew very
well. I don't have the instructions in front of me, but I recall that
the CG is to be located at the leading edge of the lower wing. I can
check at home for certain. The kit is definitely a "builder's kit" - it
took me most of a year working on-and-off to finish it. The instructions
are very good quality, as are the materials. But there's just a lot to
do!
Bob Smith
Gary Dyrkacz
Mark Kriz <Kr...@canisius.edu> wrote:
>Gary Berg wrote:
>>
>> I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
>> from a friend of mine. He didn't have the plans for it any more. Is
>> there some kind soul out there with one who could tell me just where
>> the CG is supposed to be?
>>
>> Thanks, Gary
>>
>> --
>> ----------------------------------------------------------
>> * Gary Berg Yakima, Washington, USA *
>> * gb...@wolfenet.com *
>> * Opinions expressed here are mine. You can't have them. *
>> ----------------------------------------------------------
>OK, the Smith Miniplane. The balancing point is about 3/16 of an inch
>back from the front of the bottom wing. I balanced mine there, and it
>fies great!!! I have an OS .40 SF ABC on the front of it, and it does
>OK, would be more interesting with a good .46 on it.
>I'm assuming you also need the control surface throws. They are:
> Rudder: 1 inch left, and 1 inch right
> Elevator: 5/8 inch up, and 5/8 inch down
> Ailerons: 1/2 inch up, and 1/2 inch down
>I put some down thrust on the engine because the plane tends to climb on
>full trottle; this seemed to help stop this. The plans do not call for
>it though.
>Hope this helps. If you need anymore information let me know.
>Mark Kriz, S.J.
Based on a recommendation from someone who had gone through several, I
put the CG right at the leading edge of the bottom wing. I had a OS
61 4-stroke. The plane flew great. I even went out and bought
another kit when my orginal crashed. Still haven't put the new one
together yet.
-
Gary Dyrkacz
dyr...@mcs.net
Learn about Radio Control Aircraft
http://www.mcs.net/~dyrgcmn/
-
Wm F Archibald
In article <325104...@sa.erisoft.se>, Thomas Bjurman
>Gary Berg wrote:
>>
>> I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
>> from a friend of mine. He didn't have the plans for it any more. Is
>> there some kind soul out there with one who could tell me just where
>> the CG is supposed to be?
>>
>> Thanks, Gary
>>
This is the Mini Bipe, right?
I got a comment that ought to get people asking "so why the hell did
he bother saying *anything* ? "
Hopefully this will jog another's memory.
There is a re-positioning of the upper wing to make the Smith Mini
bi-plane a great flyer. I believe it was 1/4 inch forward.
Again, sorry for 'rumor', hopefully someone can confirm or refute
-Bill Archibald (wa...@ultranet.com) treasurer & webmeister,
Lazy Loopers Flying Club ( http://www.ultranet.com/~warch/llfc.htm )
"half of what I say is mostly speculation,
the majority of the rest is B.S. "
sitler
Gary Berg wrote:
>
> I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
> from a friend of mine. He didn't have the plans for it any more. Is
> there some kind soul out there with one who could tell me just where
> the CG is supposed to be?
>
> Thanks, Gary
>
> ----------------------------------------------------------
> * Gary Berg Yakima, Washington, USA *
> * gb...@wolfenet.com *
> * Opinions expressed here are mine. You can't have them. *
> ----------------------------------------------------------
but about 1/2 inch behind then leading edge of the lower wing is a good
starting point.
Bill Sitler
sitler
Thomas Bjurman wrote:
>
> Gary Berg wrote:
> >
> > I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
> > from a friend of mine. He didn't have the plans for it any more. Is
> > there some kind soul out there with one who could tell me just where
> > the CG is supposed to be?
> >
> > Thanks, Gary
> >
> > --
> > ----------------------------------------------------------
> > * Gary Berg Yakima, Washington, USA *
> > * gb...@wolfenet.com *
> > * Opinions expressed here are mine. You can't have them. *
> > ----------------------------------------------------------
>
>
> Sorry, I don't have information about the CG but I really like to
> hear comments from all of you who has built or flown this model.
> I'm thinking of buying the kit myself.
>
>
> /Thomas
>
> ---
> Thomas Bjurman (thomas....@sa.erisoft.se) Phone +46 910731212
> Erisoft AB, S-932 83 Skelleftea, SWEDEN Fax: +46 910731099
squirrely little bi-plane. Lots of fun to fly. Good in wind. Will
probably need nose weight so use a big engine. I have a Fox 45 in
mine. It has poor outside performance due to its almost flat airfoil.
If it hunts during stright level flight try alittle neg incidence on
the upper wing. 1/16 inch shims under the rear cabine and n-struts do
the job.
Happy Flying,
Bill Sitler
sitler
sitler wrote:
>
> Gary Berg wrote:
> >
> > I just bought a framed-up Smith Miniplane (.40-size, from the Sig kit)
> > from a friend of mine. He didn't have the plans for it any more. Is
> > there some kind soul out there with one who could tell me just where
> > the CG is supposed to be?
> >
> > Thanks, Gary
> >
> > --
> > ----------------------------------------------------------
> > * Gary Berg Yakima, Washington, USA *
> > * gb...@wolfenet.com *
> > * Opinions expressed here are mine. You can't have them. *
> > ----------------------------------------------------------
> but about 1/2 inch behind then leading edge of the lower wing is a good
> starting point.
>
> Bill Sitler
mini plane 1/2 inch may be too far back. Try balancing it at the
leading edge of the lower wing and then work you way back.
Happy Flying
Bill Sitler