Today's Message Index:
----------------------
1. 07:03 AM - Re: Fuel tank - feels like I'm building an RV-7 ! (Jack Philips)
2. 08:31 AM - Re: Fuel tank - feels like I'm building an RV-7 ! (aerocarjake)
3. 04:48 PM - aluminum welding troubles (aviken)
4. 05:49 PM - Basic Torch Safety (tkreiner)
5. 06:08 PM - Re: Basic Torch Safety (Gary Boothe)
6. 06:09 PM - Re: aluminum welding troubles (John Franklin)
7. 07:09 PM - Headset Modification (gliderx5@comcast.net)
8. 09:01 PM - Re: Re: Fuel tank - feels like I'm building an RV-7 ! (CatDesigns)
9. 09:16 PM - Re: aluminum welding troubles (glenschweizer@yahoo.com)
Message 1
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| Subject: | Fuel tank - feels like I'm building an RV-7 ! |
Looks good, Jake. Looks very much like mine. Be sure to leak test it after
welding. I used a latex glove as a pressure regulator, and inflated the
tank by mouth (you don't want more than about 2-3 psi). After the initial
weld I found 37 pinhole leaks. Back to the welder, then tested again and
found 9 leaks. Back to the welder again and no leaks. It's been in service
now for over 10 years and still has no leaks.
Jack Phillips
NX899JP
Smith Mountain Lake, Virginia
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of aerocarjake
Sent: Monday, March 9, 2015 3:22 PM
Subject: Pietenpol-List: Fuel tank - feels like I'm building an RV-7 !
--> < <mailto:flight.jake@gmail.com> flight.jake@gmail.com>
Hello good Piet-ple,
A quick update on my project.
Been working on the fuel tank lately - only one tank that will sit in the
wing center-section. After a couple false starts it's finally starting to
come together. I'm making the tank out of 0.063 5052 sheet so it feels like
I'm building the wing to an RV-7....! (So much for a steel-tube, wood and
fabric airplane...!!)
The current plan is for the internal grid to be rivited to itself and the
external seems to be fully welded - similar in construction to the Stearman.
Hope you all are enjoying spring...!
--------
Jake Schultz - curator,
Newport Way Air Museum (OK, it's just my home)
Read this topic online here:
<http://forums.matronics.com/viewtopic.php?p=439203#439203>
http://forums.matronics.com/viewtopic.php?p=439203#439203
Attachments:
<http://forums.matronics.com/files/4_practice_rib_492.jpg>
http://forums.matronics.com//files/4_practice_rib_492.jpg
<http://forums.matronics.com/files/3_bent_flange_184.jpg>
http://forums.matronics.com//files/3_bent_flange_184.jpg
<http://forums.matronics.com/files/2_bending_flange_589.jpg>
http://forums.matronics.com//files/2_bending_flange_589.jpg
<http://forums.matronics.com/files/1_fuel_tank_in_work_808.jpg>
http://forums.matronics.com//files/1_fuel_tank_in_work_808.jpg
http://www.matronics.com/Navigator?Pietenpol-List
http://www.matronics.com/contribution
Message 2
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| Subject: | Re: Fuel tank - feels like I'm building an RV-7 ! |
Going to use actual Stearman sumps. I have not decided yet if I will cut off part
of the flanges and have them welded on or use bolts and proseal. (Stearman
tanks do it both ways.)
--------
Jake Schultz - curator,
Newport Way Air Museum (OK, it's just my home)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=439229#439229
Attachments:
http://forums.matronics.com//files/2_sump_211.jpg
http://forums.matronics.com//files/1_sump_386.jpg
Message 3
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| Subject: | aluminum welding troubles |
Frustrated in Arkansas. I took my 050. aluminum sheet metal gas tank to the local
sheet metal fabricators , and they tell me it will be a couple of days before
they can weld it . I wait two weeks and call and they tell me they are afraid
to try it because they feel the tig machine they have won't weld that thin
.... Why didn't they tell me that two weeks ago. DANG!!!!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=439240#439240
Message 4
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| Subject: | Basic Torch Safety |
Recently, I observed, and intervened in a situation that could have become dangerous
- even deadly.
A number of us were working on equipment when one of the guys was about to begin
brazing a cast iron piece, and upon lighting his torch, we heard a series of
Pops. The sound was staccato - almost like low intensity machine gun fire, prompting
me to immediately shut off both the Ox and acetylene. The Popping ceased
moments later...
What was occurring was due to several factors, including: a runaway acetylene
regulator, faulty check valves, and, last but not least, bad O-Rings inside the
torch handle.
The issue with the regulator was solved by Welding Supply to the tune of $140 for
a new regulator. Since they were out of the check valves, we removed them
from the torch handle, and continued on.
While troubleshooting, we noted that the torch tip wasn't flowing gas -- so with
tank valves turned off - I wrapped my hand around it and attempted to remove
it from the handle. As many of you know - or should know - Victor 100 torches,
including all their clones like the Uniweld, and Harbor Freight torches -
use two O-Rings to seal the gases from one another and, since they are compliant
seals, the tip is to be HAND TIGHTENED ONLY.
The torch in question not only had a wrench tightened tip, the O-Rings were cut,
allowing the gases to mix INSIDE THE HANDLE... Exactly why the O-Rings were
added to the design in the first place; to eliminate mixing within the handle!
In the pic you'll see the handle end of the torch tip - where it enters the torch
handle, along with the two O-Rings. The O-Rings themselves are metric, and
they are available from Amazon at this link:
http://www.amazon.com/Uniweld-TXRK-Tip-O-Ring-Repair/dp/B00FI1JM9G
I've also located the same O-Rings in Viton, which should cost a whopping 3 cents
more each, assuming we can buy then in the right volume. I'm attempting to
get a quotation on 300 pieces of each to keep on hand in my shop and supply to
anyone needing some for their torch collection.
Now - please make sure your torch is ready to go, and if you have any issues that
don't seem right, STOP. Figure out what the issue is, or take your rig to
a competent welding supply shop. They will assist at no cost for trouble shooting.
If, on the other hand, like the torch above, and the 8 torch tips in my own collection,
which had cracked O-Rings.... Upgrade now and ensure that anyone using
your torch is using a tool that's not going to hurt them.
--------
Tom Kreiner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=439242#439242
Attachments:
http://forums.matronics.com//files/torch_o_rings_491.jpg
Message 5
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| Subject: | Basic Torch Safety |
Thanks, Tom.
Gary Boothe
NX308MB
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of tkreiner
Sent: Tuesday, March 10, 2015 5:49 PM
Subject: Pietenpol-List: Basic Torch Safety
Recently, I observed, and intervened in a situation that could have become
dangerous - even deadly.
A number of us were working on equipment when one of the guys was about to
begin brazing a cast iron piece, and upon lighting his torch, we heard a
series of Pops. The sound was staccato - almost like low intensity machine
gun fire, prompting me to immediately shut off both the Ox and acetylene.
The Popping ceased moments later...
What was occurring was due to several factors, including: a runaway
acetylene regulator, faulty check valves, and, last but not least, bad
O-Rings inside the torch handle.
The issue with the regulator was solved by Welding Supply to the tune of
$140 for a new regulator. Since they were out of the check valves, we
removed them from the torch handle, and continued on.
While troubleshooting, we noted that the torch tip wasn't flowing gas -- so
with tank valves turned off - I wrapped my hand around it and attempted to
remove it from the handle. As many of you know - or should know - Victor
100 torches, including all their clones like the Uniweld, and Harbor Freight
torches - use two O-Rings to seal the gases from one another and, since they
are compliant seals, the tip is to be HAND TIGHTENED ONLY.
The torch in question not only had a wrench tightened tip, the O-Rings were
cut, allowing the gases to mix INSIDE THE HANDLE... Exactly why the O-Rings
were added to the design in the first place; to eliminate mixing within the
handle!
In the pic you'll see the handle end of the torch tip - where it enters the
torch handle, along with the two O-Rings. The O-Rings themselves are
metric, and they are available from Amazon at this link:
http://www.amazon.com/Uniweld-TXRK-Tip-O-Ring-Repair/dp/B00FI1JM9G
I've also located the same O-Rings in Viton, which should cost a whopping 3
cents more each, assuming we can buy then in the right volume. I'm
attempting to get a quotation on 300 pieces of each to keep on hand in my
shop and supply to anyone needing some for their torch collection.
Now - please make sure your torch is ready to go, and if you have any issues
that don't seem right, STOP. Figure out what the issue is, or take your rig
to a competent welding supply shop. They will assist at no cost for
trouble shooting.
If, on the other hand, like the torch above, and the 8 torch tips in my own
collection, which had cracked O-Rings.... Upgrade now and ensure that anyone
using your torch is using a tool that's not going to hurt them.
--------
Tom Kreiner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=439242#439242
Attachments:
http://forums.matronics.com//files/torch_o_rings_491.jpg
Message 6
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| Subject: | Re: aluminum welding troubles |
I hate to hear that they can't weld 0.050" AL because I've got 0.040" AL bought from Spruce A/C which I'm told is for gas tanks. I don't know much about welding AL but here's a youtube video where a guy welds soda cans with a TIG welder: https://www.youtube.com/watch?v=lJksVs2QT5Q
Regards,
John Franklin
GN-1 / Corvair 164cid
Prairie Aire 4TA0
Needville, TX
-----Original Message-----
>From: aviken <aviken@windstream.net>
>Sent: Mar 10, 2015 6:48 PM
>To: pietenpol-list@matronics.com
>Subject: Pietenpol-List: aluminum welding troubles
>
>
>Frustrated in Arkansas. I took my 050. aluminum sheet metal gas tank to the local
sheet metal fabricators , and they tell me it will be a couple of days before
they can weld it . I wait two weeks and call and they tell me they are
afraid to try it because they feel the tig machine they have won't weld that thin
.... Why didn't they tell me that two weeks ago. DANG!!!!
Message 7
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| Subject: | Headset Modification |
I just posted a new video tip for adding cheap earbuds to your headset to cut down
on the engine/prop noise. It's effective and economical.
http://www.youtube.com/watch?v=ETiRiRqb5_I
Enjoy
Malcolm Morrison
www.wienerdogaero.com
Message 8
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| Subject: | Re: Fuel tank - feels like I'm building an RV-7 ! |
Jake
That is interesting, I didn't know they made sumps like that.
Chris
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of aerocarjake
Sent: Tuesday, March 10, 2015 8:32 AM
Subject: Pietenpol-List: Re: Fuel tank - feels like I'm building an RV-7 !
--> <flight.jake@gmail.com>
Going to use actual Stearman sumps. I have not decided yet if I will cut off
part of the flanges and have them welded on or use bolts and proseal.
(Stearman tanks do it both ways.)
--------
Jake Schultz - curator,
Newport Way Air Museum (OK, it's just my home)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=439229#439229
Attachments:
http://forums.matronics.com//files/2_sump_211.jpg
http://forums.matronics.com//files/1_sump_386.jpg
Message 9
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| Subject: | Re: aluminum welding troubles |
I think if truth be known, the problem lies with the welder, not the machine.
Too thick for the machine, maybe.
I tig machine provides a very precise and incredibly fast heat source. I've
welded Nixon marine exhausts with the same machine as I welded an aluminum tuna
can.
Glen, aerial in progress
Sent from my iPhone
> On Mar 10, 2015, at 6:09 PM, John Franklin <jbfjr@peoplepc.com> wrote:
>
>
> I hate to hear that they can't weld 0.050" AL because I've got 0.040" AL bought from Spruce A/C which I'm told is for gas tanks. I don't know much about welding AL but here's a youtube video where a guy welds soda cans with a TIG welder: https://www.youtube.com/watch?v=lJksVs2QT5Q
>
> Regards,
> John Franklin
> GN-1 / Corvair 164cid
> Prairie Aire 4TA0
> Needville, TX
>
>
> -----Original Message-----
>> From: aviken <aviken@windstream.net>
>> Sent: Mar 10, 2015 6:48 PM
>> To: pietenpol-list@matronics.com
>> Subject: Pietenpol-List: aluminum welding troubles
>>
>>
>> Frustrated in Arkansas. I took my 050. aluminum sheet metal gas tank to the
local sheet metal fabricators , and they tell me it will be a couple of days
before they can weld it . I wait two weeks and call and they tell me they are
afraid to try it because they feel the tig machine they have won't weld that
thin .... Why didn't they tell me that two weeks ago. DANG!!!!
>
>
>
>
>
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