Today's Message Index:
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1. 04:37 AM - Re: Metal wing (IslPilot@aol.com)
2. 05:40 PM - Trailing edge alternatives (David Lamphere)
3. 06:43 PM - Re: Trailing edge alternatives (Dave Conrad)
Message 1
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Pretty Good Rick!
Paul
CVX
Message 2
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"Tailwind List" <tailwind-list@matronics.com>
| Subject: | Trailing edge alternatives |
Let me start by saying that I admire those of you that have successfully made elevators
per plans using stainless steel for the trailing edges...
I had some .0178 401 stainless sheet I had picked up from Dillsburg (good people!).
I had access to one of those combo shear/brakes at the FBO and managed to come
home with a half dozen strips that had a 90 deg bend in them. I figured I could
finish the bend in my shop.... not! After ruining a few, I figured I could at
least cut the pieces lengthwise, form the front edge lips inward and have a
nice sharp rear edge that I planned on brazing (or soldering) together in place...
NOT!. For the last two work sessions I have tried to braze, silver braze
(15% silver rod), solder, silver solder, silver braze (45% rod), clean more,
more flux, less heat, more heat, neutral flame, oxidizing flame - no joy!....
luckily I tried these methods and materials on a few scrap pieces. Each time,
the brazing material or solder would roll off of the stainless as if it was repelled.
The only thing I've seen like it is like water droplets on teflon! Even
with the silver solder I tried soldering a piece of stainless on a scrapped
elevator rib, the stainless peeled off the PIPER channel rib material TOO easy!
Didn't really bond. The edges of the two pieces - trying to get them to bond
was even worse... ugh!
Well, that's it! I have spent the last dollar (and minute) on using stainless steel
trailing edges for the elevators (and rudder). I have bought silver (15%)
brazing rods ($38), silver brazing flux ($12), silver solder/flux kit ($7),
different silver brazing/flux kit (45% $11)... no more!
Since I do not have a MIG or TIG welder, and do not plan on spending any more money
on these parts, I am going to use an alternative..
If the rest of the stab and elevators is 4130 steel, (or plain carbon steel piper
channel) why not use 4130 on the elevator trailing edges (and rudder)? I think
I'm going to give .025 4130 sheet a try. Haven't had trouble using 4130 at
least!
Can you guys think of an better alternative?
Dave
Message 3
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| Subject: | Re: Trailing edge alternatives |
Dave, That's what I did, Works fine. Dave Conrad
On Saturday, February 12, 2005, at 07:42 PM, David Lamphere wrote:
> Let me start by saying that I admire those of you that have
> successfully made elevators per plans using stainless steel for the
> trailing edges...=A0
>
> I had some .0178 401 stainless sheet I had picked up from Dillsburg
> (good people!).
> I had access to one of those combo shear/brakes at the FBO=A0and managed
> to come home with a half dozen strips that had a 90 deg bend in them.
> I figured I could finish the bend in my shop.... not! After ruining a
> few, I figured I could at least cut the pieces lengthwise, form the
> front edge lips inward and have a nice sharp rear edge that I planned
> on brazing=A0 (or soldering) together in place... NOT!. For the last two
> work sessions I have tried to braze, silver braze (15% silver rod),
> solder, silver solder, silver braze (45% rod), clean more, more flux,
> less heat,=A0more heat, neutral flame, oxidizing flame - no
> joy!....=A0luckily I tried these methods and materials on a few scrap
> pieces. Each time, the brazing material or solder would roll off of
> the stainless as if it was repelled. The only thing I've seen like it
> is like water droplets on teflon! Even with the silver solder I tried
> soldering a piece of stainless on a scrapped elevator rib, the
> stainless peeled off the PIPER channel rib material TOO easy! Didn't
> really bond. The edges of the two pieces - trying to get them to bond
> was even worse... ugh!
>
> Well, that's it! I have spent the last dollar (and minute) on using
> stainless steel trailing edges for the elevators (and rudder). I have
> bought silver (15%)brazing rods ($38), silver brazing flux
> ($12),=A0silver solder/flux kit ($7), different silver brazing/flux kit
> (45%=A0$11)... no more!
>
> Since I do not have a MIG or TIG welder, and do not plan on spending
> any more money on these parts, I am going to use an alternative..
>
> If the rest of the stab and elevators is 4130 steel, (or plain carbon
> steel piper channel)=A0why not use 4130 on the elevator trailing edges
> (and rudder)?=A0 I think I'm going to give=A0.025 4130 sheet a
> try.=A0Haven't had trouble using=A04130 at least!
>
> Can you guys think of an better alternative?=A0
>
> Dave
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