Today's Message Index:
----------------------
1. 12:56 AM - Re: Re: Pilot seat back angle (Clif Dawson)
2. 11:49 AM - Marine plywood (Pocono John)
3. 02:17 PM - Laminating plywood. (john francis)
4. 03:33 PM - welding 4130 hinges (danoliver)
5. 06:46 PM - Re: welding 4130 hinges (CatDesigns)
6. 06:54 PM - Re: Laminating plywood. (CatDesigns)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Pilot seat back angle |
Probably right, Oscar, but what's assumed is MSL, pressure and temp.
When was the last time you saw any of those things? :-)
Also that Kelly guy running all those dyno tests stated that he never
got 40 hp out of a stock A, only 36.
Clif
Did you know that no man, or woman for that matter, has ever
gone into a hardware store wanting a drill bit.
What they really wanted was a hole.
Okay, but going down the page to acceptable rate of climb, 1180 ft in 3
minutes (about 400 FPM) may be ambitious for a 40HP Air Camper at max gross.
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
I searched the forums and did find some info, but I just wanted to share this.
I found a place 1:45 away that sells marine and aircraft plywood. Unfortunately,
they're almost out of aircraft wood and do not plan to re-stock as demand is
low and their west coast supplier went belly up.
As far as the marine plywood, they have plenty. I'm told it's BS1088 starting at
3mm (3/32", so bit too thick for 1/16" parts)up to 25mm (1"). This page shows
their selection:
http://www.condonlumber.net/plywood/marineaircraft.html
To date, I've used only wood from wicks and AS&S. Ribs are done and I have wood
for fuselage gussets (not the big side pieces or belly). I think I have enough
for tail section gussets.
Any suggestions as to where I could use the marine plywoodor where to avoid its'
use?
For anyone in the Pocono,PA region, I could pick-up sheets for you.
Finally, any suggestions on what I should buy while I'm there? Would it be OK to
use 3/32" where 1/16" is indicated (going bigger)?
Thank you.
John
--------
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453364#453364
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Laminating plywood. |
I have some good 1/16 aircraft plywood. I am in need of 1/8. Is it okay to epoxy
two 1/16 sheets together to make 1/8?
--------
John Francis
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453367#453367
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | welding 4130 hinges |
Has anyone had any trouble with brittle welds? I am new to all of this so don't
rule out rookie error. I have spent the last couple weeks trying to fab the empennage
hinges to no avail. I am using .090 4130 steel from AS&S and an oxy/acetylene
welder. My welds are easily broken and when you look at the breaks they
look crystalline. As an experiment I decided to try several methods of simply
welding two flat pieces of steel together including; preheating, postheating,
reheating, over penetration, under penetration, filler rod, and no filler rod.
All with the same result, I can bend them to about 30 degrees and then they
snap. The worst part is that I can grab any piece of scrap steel laying around
my garage, cut it in half, and weld it back together with ease. Is there some
special procedure needed to weld 4130? Do I even need to use 4130? Bernard
doesn't call for it in the plans.
Please help.
--------
Dan O
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453369#453369
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | welding 4130 hinges |
Dan
I'm not an expert but I have done all the welding on my Pietenpol using Oxy
fuel. Typically 4130 welds easily. The only time I have gotten brittle
welds is when I over heat the weld.
Questions I can think of.
Are you sure you have a soft neutral flame?
Are you using too small of a tip so it takes a lot of heat to start the weld
puddle thus over heating the metal or too big of a tip so it heats really
fast and over heats the metal?
What welding rod are you using?
Chris
Sacramento, CA
WestcoastPiet.com
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of danoliver
Sent: Wednesday, March 2, 2016 3:33 PM
Subject: Pietenpol-List: welding 4130 hinges
--> <danoliver909@gmail.com>
Has anyone had any trouble with brittle welds? I am new to all of this so
don't rule out rookie error. I have spent the last couple weeks trying to
fab the empennage hinges to no avail. I am using .090 4130 steel from AS&S
and an oxy/acetylene welder. My welds are easily broken and when you look at
the breaks they look crystalline. As an experiment I decided to try several
methods of simply welding two flat pieces of steel together including;
preheating, postheating, reheating, over penetration, under penetration,
filler rod, and no filler rod. All with the same result, I can bend them to
about 30 degrees and then they snap. The worst part is that I can grab any
piece of scrap steel laying around my garage, cut it in half, and weld it
back together with ease. Is there some special procedure needed to weld
4130? Do I even need to use 4130? Bernard doesn't call for it in the plans.
Please help.
--------
Dan O
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453369#453369
Message 6
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Laminating plywood. |
Depends on what it is used for. If it is for a spar web I might not but I
would not have any problems using elsewhere on a Pietenpol. Just make sure
you have good glue coverage between the two.
Chris
Sacramento, CA
WestcoastPiet.com
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of john francis
Sent: Wednesday, March 2, 2016 2:17 PM
Subject: Pietenpol-List: Laminating plywood.
--> <Mrkringles@msn.com>
I have some good 1/16 aircraft plywood. I am in need of 1/8. Is it okay to
epoxy two 1/16 sheets together to make 1/8?
--------
John Francis
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=453367#453367
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|