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Model Forum / Radio Controlled / Air Models / July 2005



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Firebird Commander

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solex - 04 Aug 2003 02:48 GMT
Hello,

I am new to this group and have been lurking for the past couple of
weeks and have enjoyed the information so far (in particular SPAD).  I
have built R/C models in the past and have recently decided to get back
into it.

Anyway I recently purchased a Firebird Commander from HobbyZone to learn
how to fly before moving on.  I have flown the Commander once and have
crashed it may times since the first flight.  I replaced the main wing
and have tried adjusting the vtail but cannot seem to get the plane to
climb.  In addition the C/G seems to be ok, in the middle of the wing.
Does anyone have any suggestions on where else I might look?

Thanks,
Dan
Morris Lee - 04 Aug 2003 14:36 GMT
Does it dive when you toss it?  Someone brought one to the field and we had
to do quite a bit of adjusting to raise the trailing edge of the tail to get
it to fly properly.

--
Morris Lee
morris.lee@verizon.net
> Hello,
>
[quoted text clipped - 12 lines]
> Thanks,
> Dan
ra_flyer - 01 Jul 2005 00:04 GMT
i bought as used firebird commander a few weeks ago. it's great becaus
the motor was already zip tight and the seller also put some epoxy o
the nose as a result of a previous crashes.

I flew it about 6 times now. crashed about 3 times because it was to
windy and lost the plastic shim. I found a rubber piece that is abou
the same thickness as the original plastic shim, so i just taped i
over and it seems to work.

overall, it's a great trainer, very easy to fly. much better than m
first plane, an airhog defender.

the problem i have now is the bottom of the fuselage that is startin
to split due to several hard landing without the landing gears. i trie
putting layers of packaging tape on it.

i also have ripped part of the wing because the prop that spinned on i
during crashes. just like the fuselage, i have been putting layers o
packaging tape on it to cover part of the wing that got ripped.

the plane looks pretty ugly now, because of the tapes that run all ove
the fuselage and the wing, but hey, the plane still flies and turns.

if anyone have other suggestions on how to reinforce the fuselage an
the wing, please let me know.

thx

--
ra_flye
Martin X. Moleski, SJ - 01 Jul 2005 01:57 GMT
>if anyone have other suggestions on how to reinforce the fuselage and
>the wing, please let me know.

Sounds like you're taking the right approach:  keep it super-simple (KISS).

You might try putting a popsicle stick under the fuselage to help take
some of the landing stress--it might save you some retaping.
Or you might try some balsa or foam sanded to shape.

                    Marty
ra_flyer - 01 Jul 2005 23:25 GMT
Martin X. Moleski, SJ Wrote:

> >if anyone have other suggestions on how to reinforce the fuselage and
> >the wing, please let me know.
[quoted text clipped - 7 lines]
>
> Marty

thanks for the suggestion Marty.

do i just glue this popsicle stick at the bottom of the fuselage? wha
kind of glue do you recommend?

i crashed it again this morning on the 3rd flight due to bad landin
approach. the nose is split open now, it ripped the fiberglass tape o
it.

the first 2 flights i managed to land successfully though :-

--
ra_flye
Martin X. Moleski, SJ - 02 Jul 2005 04:54 GMT
>thanks for the suggestion Marty.

You're welcome.

>do i just glue this popsicle stick at the bottom of the fuselage? what
>kind of glue do you recommend?

You've got to hold the plane in your hands and imagine
where the stresses are, then see what kind of splints might
help heal the break and prevent new fractures.

Goop should work great.  Epoxy might work, too.
You might have to scuff up the plastic to give the epoxy
more purchase.  Some other glues (CA?) might melt the plastic,
so be careful.

>i crashed it again this morning on the 3rd flight due to bad landing
>approach. the nose is split open now, it ripped the fiberglass tape on
>it.

Hmm.  Wait a minute.  You might get  a nice repair by using
CA to attach fiberglass over the seam.  Seems to me I've
done that on some ABC cowls and suchlike.  Patches like
this are stronger if you can cut the fiberglass on a bias--so
the threads run across the seam at 45 degrees rather than
being parallel and at 90 degrees to it.

>the first 2 flights i managed to land successfully though :-)

Well, that's what will ultimately solve your problem.  :o)

                    Marty
 
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