Fixing Warped Ply

Fixing Warped Ply

Post by Jim Meyer » Thu, 07 Feb 2002 07:12:34



I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is still
warped (when removed from the clamp). Any ideas in how to fix it?

--Jim
NAR# 77786 L2/TRA# 8361 L2

 
 
 

Fixing Warped Ply

Post by John Gordo » Thu, 07 Feb 2002 09:25:48



Quote:
> I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
still
> warped (when removed from the clamp). Any ideas in how to fix it?

> --Jim
> NAR# 77786 L2/TRA# 8361 L2

I'm out on a limb here, but you asked for ideas...

Contact a woodworking club, specifically a chair-maker who has equipment for
steaming and bending wood.  They heat it up and it's pliable for about 45
seconds while they put it into a form.  This is sounding like a lot of
trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by Jim Meyer » Thu, 07 Feb 2002 09:33:10


Getting more ply would, of course, be a good idea. However, the ply is
already cut into the shape of a fin and attached to one of my rockets... I
thought about steaming but am worried about making it worse. Has anyone
tried this?

--Jim
NAR# 77786 L2/TRA# 8361 L2


Quote:



> > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
> still
> > warped (when removed from the clamp). Any ideas in how to fix it?

> > --Jim
> > NAR# 77786 L2/TRA# 8361 L2

> I'm out on a limb here, but you asked for ideas...

> Contact a woodworking club, specifically a chair-maker who has equipment
for
> steaming and bending wood.  They heat it up and it's pliable for about 45
> seconds while they put it into a form.  This is sounding like a lot of
> trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by shro » Thu, 07 Feb 2002 09:40:10


You can by handheld steamers for cleaning countertops for less than $40.

Shrox
-----------------------------

Quote:



> > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
> still
> > warped (when removed from the clamp). Any ideas in how to fix it?

> > --Jim
> > NAR# 77786 L2/TRA# 8361 L2

> I'm out on a limb here, but you asked for ideas...

> Contact a woodworking club, specifically a chair-maker who has equipment for
> steaming and bending wood.  They heat it up and it's pliable for about 45
> seconds while they put it into a form.  This is sounding like a lot of
> trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by Chris Kieken » Thu, 07 Feb 2002 09:47:16


ply would!

thats funny!

gramatically correct, but funny!


Quote:
> Getting more ply would, of course, be a good idea. However, the ply is
> already cut into the shape of a fin and attached to one of my rockets... I
> thought about steaming but am worried about making it worse. Has anyone
> tried this?

> --Jim
> NAR# 77786 L2/TRA# 8361 L2





> > > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
> > still
> > > warped (when removed from the clamp). Any ideas in how to fix it?

> > > --Jim
> > > NAR# 77786 L2/TRA# 8361 L2

> > I'm out on a limb here, but you asked for ideas...

> > Contact a woodworking club, specifically a chair-maker who has equipment
> for
> > steaming and bending wood.  They heat it up and it's pliable for about
45
> > seconds while they put it into a form.  This is sounding like a lot of
> > trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by John Karpic » Thu, 07 Feb 2002 11:25:25


I fixed the warped fins that came with my Mini-Mag by steaming inside the
the warp. This caused that side to expand, and correct the warp. Did it stay
warp free? I don't know, as the warp was along the root edge, and once the
fins were glued in  kept them from warping again.

I used a large pot of water on the stove (the one we use to cook  spaghetti
in). Once the water was boiling I brought the fin into the steam. Keep it
high above the pot, You can bring it closer once you get a feel for how it
is going to take. You will need a straight edge to use as a reference, to
know when you reach your "goal".


Quote:
> I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
still
> warped (when removed from the clamp). Any ideas in how to fix it?

> --Jim
> NAR# 77786 L2/TRA# 8361 L2

 
 
 

Fixing Warped Ply

Post by Jon Ros » Thu, 07 Feb 2002 14:12:16


Jim,
Steaming the fin already attached to the rocket sounds awful dicey. You
would really need to protect the rest of the rocket from the steam while
doing it.

If its already attached I'll guess the warp is curved from root edge to tip,
correct? If the warp is not bad this should not affect the flight of the
rocket. I've got one I fixed before building that warped aging after
building and painting. As the fin is still straight in the direction of
travel, the warp has not bothered it. It always flies perfectly straight.

If it is curved from leading to trailing edge it most likely would affect
flight and it might be worth the risk to try steaming it or removing it and
replacing it.

My 2 cents,
Jon


Quote:
> Getting more ply would, of course, be a good idea. However, the ply is
> already cut into the shape of a fin and attached to one of my rockets... I
> thought about steaming but am worried about making it worse. Has anyone
> tried this?

> --Jim
> NAR# 77786 L2/TRA# 8361 L2





> > > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
> > still
> > > warped (when removed from the clamp). Any ideas in how to fix it?

> > > --Jim
> > > NAR# 77786 L2/TRA# 8361 L2

> > I'm out on a limb here, but you asked for ideas...

> > Contact a woodworking club, specifically a chair-maker who has equipment
> for
> > steaming and bending wood.  They heat it up and it's pliable for about
45
> > seconds while they put it into a form.  This is sounding like a lot of
> > trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by Jim Meyer » Thu, 07 Feb 2002 20:38:21


Agreed,  the curvature is not likely to affect the flight path. Fixing it's
more a matter of pride. I guess I'll just leave it in a vice for a few weeks
and hope it gets the idea. Probably not worth the risk of steaming and
making it worse.

--Jim
NAR# 77786 L2/TRA# 8361 L2


Quote:
> Jim,
> Steaming the fin already attached to the rocket sounds awful dicey. You
> would really need to protect the rest of the rocket from the steam while
> doing it.

> If its already attached I'll guess the warp is curved from root edge to
tip,
> correct? If the warp is not bad this should not affect the flight of the
> rocket. I've got one I fixed before building that warped aging after
> building and painting. As the fin is still straight in the direction of
> travel, the warp has not bothered it. It always flies perfectly straight.

> If it is curved from leading to trailing edge it most likely would affect
> flight and it might be worth the risk to try steaming it or removing it
and
> replacing it.

> My 2 cents,
> Jon



> > Getting more ply would, of course, be a good idea. However, the ply is
> > already cut into the shape of a fin and attached to one of my rockets...
I
> > thought about steaming but am worried about making it worse. Has anyone
> > tried this?

> > --Jim
> > NAR# 77786 L2/TRA# 8361 L2





> > > > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it
is
> > > still
> > > > warped (when removed from the clamp). Any ideas in how to fix it?

> > > > --Jim
> > > > NAR# 77786 L2/TRA# 8361 L2

> > > I'm out on a limb here, but you asked for ideas...

> > > Contact a woodworking club, specifically a chair-maker who has
equipment
> > for
> > > steaming and bending wood.  They heat it up and it's pliable for about
> 45
> > > seconds while they put it into a form.  This is sounding like a lot of
> > > trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by Lew Garr » Thu, 07 Feb 2002 22:02:23


Quote:
>Subject: Re: Fixing Warped Ply

Jim,
 I don't remember where I heard it but it seems to me that I was told by a
woodworking type person (hows that for a lead in?) that a mix of vinegar and
water followed by a clamp would probably straighten it out...or was that a
gynecologist?
  The non-*** form of steaming the plywood is to cover it with a damp towel
for 48 hours and then forming it (clamp between two 'plates').
Lew

Quote:

>Date: 2/5/2002 7:33 PM Eastern Standard Time

>Getting more ply would, of course, be a good idea. However, the ply is
>already cut into the shape of a fin and attached to one of my rockets... I
>thought about steaming but am worried about making it worse. Has anyone
>tried this?

>--Jim
>NAR# 77786 L2/TRA# 8361 L2





>> > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
>> still
>> > warped (when removed from the clamp). Any ideas in how to fix it?

>> > --Jim
>> > NAR# 77786 L2/TRA# 8361 L2

>> I'm out on a limb here, but you asked for ideas...

>> Contact a woodworking club, specifically a chair-maker who has equipment
>for
>> steaming and bending wood.  They heat it up and it's pliable for about 45
>> seconds while they put it into a form.  This is sounding like a lot of
>> trouble for a piece of ply... got more ply?

Lew Garrow
TRA 7181 L3
NAR 77928 L3
METRA VP
Maryland Delaware Assn
 
 
 

Fixing Warped Ply

Post by Jim Meyer » Thu, 07 Feb 2002 23:03:19


Ah... The wet noodle wrap approach sound safe. Can I use puff pastry in lieu
of a towel? Fin Wellington...

--Jim
NAR# 77786 L2/TRA# 8361 L2


Quote:
> >Subject: Re: Fixing Warped Ply
> Jim,
>  I don't remember where I heard it but it seems to me that I was told by a
> woodworking type person (hows that for a lead in?) that a mix of vinegar
and
> water followed by a clamp would probably straighten it out...or was that a
> gynecologist?
>   The non-*** form of steaming the plywood is to cover it with a damp
towel
> for 48 hours and then forming it (clamp between two 'plates').
> Lew


> >Date: 2/5/2002 7:33 PM Eastern Standard Time

> >Getting more ply would, of course, be a good idea. However, the ply is
> >already cut into the shape of a fin and attached to one of my rockets...
I
> >thought about steaming but am worried about making it worse. Has anyone
> >tried this?

> >--Jim
> >NAR# 77786 L2/TRA# 8361 L2





> >> > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
> >> still
> >> > warped (when removed from the clamp). Any ideas in how to fix it?

> >> > --Jim
> >> > NAR# 77786 L2/TRA# 8361 L2

> >> I'm out on a limb here, but you asked for ideas...

> >> Contact a woodworking club, specifically a chair-maker who has
equipment
> >for
> >> steaming and bending wood.  They heat it up and it's pliable for about
45
> >> seconds while they put it into a form.  This is sounding like a lot of
> >> trouble for a piece of ply... got more ply?

> Lew Garrow
> TRA 7181 L3
> NAR 77928 L3
> METRA VP
> Maryland Delaware Assn

 
 
 

Fixing Warped Ply

Post by Lew Garr » Fri, 08 Feb 2002 00:19:23


Quote:
>ubject: Re: Fixing Warped Ply

>Date: 2/6/2002 9:03 AM Eastern Standard Time

>Ah... The wet noodle wrap approach sound safe. Can I use puff pastry in lieu
>of a towel? Fin Wellington...

>--Jim
>NAR# 77786 L2/TRA# 8361 L2

yes, but a light touch with the fois gras is required........
Lew Garrow
TRA 7181 L3
NAR 77928 L3
METRA VP
Maryland Delaware Assn
 
 
 

Fixing Warped Ply

Post by Jon Ros » Fri, 08 Feb 2002 01:47:34


Know what you mean. Its one of those things only you will notice, but will
bug the ***out of you nonetheless.

Jon


Quote:
> Agreed,  the curvature is not likely to affect the flight path. Fixing
it's
> more a matter of pride. I guess I'll just leave it in a vice for a few
weeks
> and hope it gets the idea. Probably not worth the risk of steaming and
> making it worse.

> --Jim
> NAR# 77786 L2/TRA# 8361 L2



> > Jim,
> > Steaming the fin already attached to the rocket sounds awful dicey. You
> > would really need to protect the rest of the rocket from the steam while
> > doing it.

> > If its already attached I'll guess the warp is curved from root edge to
> tip,
> > correct? If the warp is not bad this should not affect the flight of the
> > rocket. I've got one I fixed before building that warped aging after
> > building and painting. As the fin is still straight in the direction of
> > travel, the warp has not bothered it. It always flies perfectly
straight.

> > If it is curved from leading to trailing edge it most likely would
affect
> > flight and it might be worth the risk to try steaming it or removing it
> and
> > replacing it.

> > My 2 cents,
> > Jon



> > > Getting more ply would, of course, be a good idea. However, the ply is
> > > already cut into the shape of a fin and attached to one of my
rockets...
> I
> > > thought about steaming but am worried about making it worse. Has
anyone
> > > tried this?

> > > --Jim
> > > NAR# 77786 L2/TRA# 8361 L2





> > > > > I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it
> is
> > > > still
> > > > > warped (when removed from the clamp). Any ideas in how to fix it?

> > > > > --Jim
> > > > > NAR# 77786 L2/TRA# 8361 L2

> > > > I'm out on a limb here, but you asked for ideas...

> > > > Contact a woodworking club, specifically a chair-maker who has
> equipment
> > > for
> > > > steaming and bending wood.  They heat it up and it's pliable for
about
> > 45
> > > > seconds while they put it into a form.  This is sounding like a lot
of
> > > > trouble for a piece of ply... got more ply?

 
 
 

Fixing Warped Ply

Post by John Karpic » Fri, 08 Feb 2002 11:47:28


 fixed the warped fins that came with my Mini-Mag by steaming inside the
warp. This caused that side to expand, and correct the warp. Did it stay
warp free? I don't know, as the warp was along the root edge, and once the
fins were glued in  kept them from warping again.

I used a large pot of water on the stove (the one we use to cook  spaghetti
in). Once the water was boiling I brought the fin into the steam. Keep it
high above the pot, You can bring it closer once you get a feel for how it
is going to take. You will need a straight edge to use as a reference, to
know when you reach your "goal".


Quote:
> I've got a piece a warped 7-ply Birch. After 3 days in a clamp, it is
still
> warped (when removed from the clamp). Any ideas in how to fix it?

> --Jim
> NAR# 77786 L2/TRA# 8361 L2