Today's Message Index:
----------------------
1. 05:07 AM - Re: Fw: plane (Charles N. Campbell)
2. 06:20 AM - Re: plane (aviken)
3. 07:23 AM - Re: Re: plane (normdecou@aol.com)
4. 08:19 AM - Re: plane (tkreiner)
5. 08:41 AM - Re: plane (tools)
6. 08:43 AM - Re: Fw: plane (normdecou@aol.com)
Message 1
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Norman, as tkreiner said, your tail post looks too wide. The tail post
needs to be 1 inch wide, outside to outside. The way I did it was to put
in cross pieces back to station 3 (from the front (keeping every thing
square). Then I pulled the two tail posts together and sawed down the
center until the tail post was 1-inch wide. Then I just measured at each
station and cut the cross pieces as wide as they need to be. I didn't pay
any attention to the dimensions of the cross pieces given on the plans
because the dimensions given are for the short fuselage. (My plans don't
have a top view (giving dimensions) of the fuselage frame. I don't believe
the dimensions given for the short fuselage will work for the long
fuselage.) Chuck
On Mon, Jan 2, 2017 at 2:42 PM, Decou, Norman <norman.decou@ucdsb.on.ca>
wrote:
>
> I am currently attaching my fuselage sides. I have checked and rechecked
> my dimensions. As the pictures show, I have an irregular bow inward at the
> 2nd station from the back.
>
> I am using the long fuselage plans.
>
> The dimensions I am using measured from the tail are
>
> 1st strut 19.125" from the end of the tail 7 " across
>
> 2nd strut 41.5" from the end of the tail 11" across
>
> 3rd strut 68.375" from the end of the tail 17" across
>
> 4th strut 95.5`` from the end of the tail 22`` across
>
> Plan dimensions for the sides are 19.375-------19.375 total
>
>
> 22.500-------41.875 total
>
>
> 27.000-------68.875 total
>
>
> 27.250-------96.125 total
>
> I recognize that there are slight differences between my dimensions and
> the fuselage side dimensions. I believe that some of this is due to the
> curve at the tail effectively reducing the length when the sides.
>
>
> I just need to know if someone can identify my error.
>
>
> I don`t want to arbitrarily change plan dimensions but I do not believe
> this bow is intended to be there.
>
>
> Any ideas or suggestions would be greatly appreciated,
>
> Norm
>
> ------------------------------
> III
>
Message 2
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I haven't checked your measurements against my plans, I built the 1933 plans plane
and it all seemed to work out. I would not want to have the reverse bow,
I believe it will add un-needed stress to those joints. Surely there is a mistake
somewhere in the dimensions . I believe the most important area would
be the tail-post and the seat back station. I wouldn't want to wander too
far at those points, but I don't believe a variation of width between those two
to keep a smooth bow would hurt.
That being said, I have found everytime I have strayed from the plans, somewhere
down the line I regretted it.
Just my opinion and it isn't worth much ha ha.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464646#464646
Message 3
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Hi aviken,
The reverse bow concerned me too but like you I do not like to stray fro established
plans (I usually pay the price down the road).
Thanks for your thoughts,
Norm
Adrienne
---- Original Message ----
From: aviken <aviken@hughes.net>
Sent: Tue, Jan 3, 2017 9:20 am
Subject: Pietenpol-List: Re: plane
I haven't checked your measurements against my plans, I built the 1933 plans plane
and it all seemed to work out. I would not want to have the reverse bow,
I believe it will add un-needed stress to those joints. Surely there is a mistake
somewhere in the dimensions . I believe the most important area would
be the tail-post and the seat back station. I wouldn't want to wander too
far at those points, but I don't believe a variation of width between those two
to keep a smooth bow would hurt.
That being said, I have found everytime I have strayed from the plans, somewhere
down the line I regretted it.
Just my opinion and it isn't worth much ha ha.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464646#464646
Message 4
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Norm,
Don't know how I deleted my original reply, but from your 4th photo, it appears
the tailpost is too wide. As others have chimed in, sawing it to the 1" thickness
would be appropriate...
Reverse bow, however, is another issue, and I concur; the bow needs to be eliminated
entirely, as others have already stated. Whatever length of crosspieces
is needed to achieve this should probably be notated on your set of plans.
You have not stated - or I missed - whether your fuse width is per plans or slightly
wider. This could be the driving issue if it is wider....
Best of luck with your build & Happy New Year!
--------
Tom Kreiner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464650#464650
Message 5
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This falls squarely in the "things that make you go hmmm...."zone.
Seemed to happen a lot building model airplanes.
As much as anything, different pieces of wood bend differently and will contribute.
So, two choices as I see it. Just live with the result, I do not believe
it introduces any detrimental stress. That sort of stress lives in all wing
ribs, and in the bend at the front of the fuse. Second, just cut to fit and
ensure a nice smooth curve. In this case, you will not be introducing enough
change to cascade into a problem later. Some things do, and right quick, but
not there.
When I rebuilt my fuse, main gear and fittings, and replaced the wing struts, I
was pretty worried about inadvertent change to the rigging of the plane. But,
it had to be done, figured I'd just do the best I could, and test fly very conservatively
and work from there. Turns out I could tell no difference. This
plane lives right smack dab in the middle of the forgiving zone.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464652#464652
Message 6
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Hi Chuck,
Hopefully, by the end of the day today I will have the tail down to 1 inch. Thanks
or the advice. I know from building other assemblies that if the primary
structure is not square everything that follows is a nightmare.
Thanks again,
Norm
Adrienne
---- Original Message ----
From: Charles N. Campbell <charlescampbell1924@gmail.com>
Sent: Tue, Jan 3, 2017 8:53 am
Subject: Re: Pietenpol-List: Fw: plane
Norman, as tkreiner said, your tail post looks too wide. The tail post needs to
be 1 inch wide, outside to outside. The way I did it was to put in cross pieces
back to station 3 (from the front (keeping every thing square). Then I pulled
the two tail posts together and sawed down the center until the tail post
was 1-inch wide. Then I just measured at each station and cut the cross pieces
as wide as they need to be. I didn't pay any attention to the dimensions
of the cross pieces given on the plans because the dimensions given are for the
short fuselage. (My plans don't have a top view (giving dimensions) of the
fuselage frame. I don't believe the dimensions given for the short fuselage will
work for the long fuselage.) Chuck
On Mon, Jan 2, 2017 at 2:42 PM, Decou, Norman <norman.decou@ucdsb.on.ca> wrote:
I am currently attaching my fuselage sides. I have checked and rechecked my dimensions.
As the pictures show, I have an irregular bow inward at the 2nd station
from the back.
I am using the long fuselage plans.
The dimensions I am using measured from the tail are
1st strut 19.125" from the end of the tail 7 " across
2nd strut 41.5" from the end of the tail 11" across
3rd strut 68.375" from the end of the tail 17" across
4th strut 95.5`` from the end of the tail 22`` across
Plan dimensions for the sides are 19.375-------19.375 total
22.500-------41.875
total
27.000-------68.875
total
27.250-------96.125
total
I recognize that there are slight differences between my dimensions and the fuselage
side dimensions. I believe that some of this is due to the curve at the
tail effectively reducing the length when the sides.
I just need to know if someone can identify my error.
I don`t want to arbitrarily change plan dimensions but I do not believe this bow
is intended to be there.
Any ideas or suggestions would be greatly appreciated,
Norm
III
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