Today's Message Index:
----------------------
0. 12:17 AM - Fund Raiser Lagging Last Year By Over 30%... (Matt Dralle)
1. 02:34 AM - Re: Re: HDPE fuel tanks (John Swartout)
2. 05:27 AM - Re: HDPE fuel tanks (kmccune)
3. 05:37 AM - Re: HDPE fuel tanks (BokKat)
4. 05:40 AM - Re: Re: HDPE fuel tanks (BokKat)
5. 06:04 AM - My Airport (Tommy Walker)
6. 06:34 AM - Re: My Airport (n85ae)
7. 07:06 AM - Re: My Airport (Harvey Richards)
8. 07:11 AM - Re: Re: HDPE fuel tanks (MacDonald Doug)
9. 07:37 AM - Re: My Airport (Randall J. Hebert)
10. 08:06 AM - Re: Re: HDPE fuel tanks (Ken Ryan)
11. 08:39 AM - Re: Re: HDPE fuel tanks (John Swartout)
12. 08:43 AM - Re: Re: HDPE fuel tanks (BokKat)
13. 09:42 AM - Re: HDPE fuel tanks (gburdett)
14. 09:43 AM - Re: My Airport (Coloradodan)
15. 10:01 AM - Re: My Airport (Tommy Walker)
16. 10:09 AM - Re: Re: My Airport (Randall J. Hebert)
17. 11:04 AM - Re: Re: HDPE fuel tanks (John Bolding)
18. 11:40 AM - Re: 701 Wet Wing (Was HDPE fuel tanks) (MacDonald Doug)
19. 01:55 PM - 7R2-3 Rudder horn thickness (Bob Percival)
20. 02:07 PM - Re: Re: HDPE fuel tanks (Curt Thompson)
21. 02:14 PM - Re: 7R2-3 Rudder horn thickness (Harvey Richards)
22. 02:17 PM - Re: Re: 7R2-3 Rudder horn thickness (Bob Percival)
23. 02:47 PM - Re: HDPE fuel tanks (kmccune)
24. 03:56 PM - Re: Re: HDPE fuel tanks (Joemotis@aol.com)
25. 04:12 PM - Re: Re: HDPE fuel tanks (raymondj)
26. 06:17 PM - Re: Re: HDPE fuel tanks (Curt Thompson)
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| Subject: | Fund Raiser Lagging Last Year By Over 30%... |
As of the 13th, the Fund Raiser is currently about 30% behind last year in terms
of the number of Contributions. Yet, oddly the number of messages posted per
day is up by 10 to 20% on the average. It costs real money to run these Lists
and they are supported 100% though your Contributions during the Fund Raiser.
Won't you please take a minute right now to make your Contribution to keep
these Lists up and running?
Contribution Page:
http://www.matronics.com/contribution
Thank you for your support!
Matt Dralle
Email List Admin.
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| Subject: | Re: HDPE fuel tanks |
Oh, I didn't know you were scratch-building. I believe I would measure
after the ribs are done. I don't know how the screws are secured on the
Maule--maybe they just use Tinnerman clips.
Where can you have HDPE tanks made to order?
On Thu, Nov 13, 2008 at 9:34 PM, kmccune <kmccune@somtel.net> wrote:
>
> So make the ribs and measure them before I give the guy the dimensions? As
> I was going to have them made to print, just out of HDPE, well I was going
> to make them slightly larger along the wing cord, but just a little.
> I like the screw on cover idea,anyone hear of this being done on a 701 or
> should I ask Zenith?
>
> --------
> Mark Twain: Twenty years from now you will be more disappointed by the
> things that you didn't do than by the ones you did do. So throw off the
> bowlines. Sail away from the safe harbor. Catch the trade winds in your
> sails. Explore. Dream. Discover.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=214046#214046
>
>
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| Subject: | Re: HDPE fuel tanks |
I stumbled across a guy who does this as part of his regular business. I have not
gotten a quot yet, I'm still asking questions. He claims they will be less
expensive then the ones from Zenith? I don't want to outright post his contact
info yet, because as of yet I have no proof of his product. Though he claims
to have made them for Avids and such. We will see, I posted this to see if anyone
with more experience in this type of thing had objections. It sounds as
though he makes it out of sheet stock and thermal/hot air welds them together.
Says he can help with windshield too, though the one from Zenith is kinda nice.
Kevin
--------
Mark Twain: Twenty years from now you will be more disappointed by the things that
you didn't do than by the ones you did do. So throw off the bowlines. Sail
away from the safe harbor. Catch the trade winds in your sails. Explore. Dream.
Discover.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214160#214160
Message 3
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| Subject: | Re: HDPE fuel tanks |
Yes, I had the same problem. I put 4 tanks in mine, 2 on each wing. I
put a sheet of thin cork on the bottom of the wing bay, then tried a
tank for fit. I got it in and the it wouldn't come out! No matter what
I did! I couldn't believe it, but four of my fellow experienced EAA'rs
couldn't budge the thing either! Fortunately it was in the proper place
with all the fittings attatched so I just left it there! But I live in
fear of it ever starting to leak! I think if that ever happens I'll
just use the other tank in the wing and seal off the leaking one.
I had put in two tanks per wing, but would not do that again as I doubt
I'd ever have to haul that much gas, but the other tank could save me
having to tear my hair out (and the wing apart) to replace a leaking
tank!
Do not archinve.
----- Original Message -----
From: John Swartout
To: zenith701801-list@matronics.com
Sent: Thursday, November 13, 2008 7:34 PM
Subject: Re: Zenith701801-List: HDPE fuel tanks
Don't get me started. I installed the aluminum tanks but they were a
TIGHT fit. In fact I had to put some tapered strips of aluminum on top
of the rib flanges, about .050 thick at the critical point adjacent to
the rear edge of the tanks, because the tanks were taller at the aft end
than the depth of the ribs at that point. If I'd wanted to devote more
time to it I might have looked into plastic tanks like those beautiful
tanks that come with RANS kits. The other problems with aluminum is
there is certain to be oil canning, which may cause the aluminum to
fatigue over time. If they ever leak, for any reason, you have to take
the wing apart to get them out, a real shortcoming. Maule's have a
screw-on cover in the top wing skin for fuel tank access, and excellent
idea.
Just my humble $0.02.
John
On Thu, Nov 13, 2008 at 7:31 PM, kmccune <kmccune@somtel.net> wrote:
<kmccune@somtel.net>
I there any pros or cons to having HDPE tanks made, instead of the
AL ones?
Keivn
--------
Mark Twain: Twenty years from now you will be more disappointed by
the things that you didn't do than by the ones you did do. So throw off
the bowlines. Sail away from the safe harbor. Catch the trade winds in
your sails. Explore. Dream. Discover.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214018#214018
Message 4
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| Subject: | Re: HDPE fuel tanks |
I was going to put screw on covers but abandoned the idea when I saw I
couldn't get the darned things out anyway, and I had a "spare" in each wing.
Do not archinve.
----- Original Message -----
From: "kmccune" <kmccune@somtel.net>
Sent: Thursday, November 13, 2008 8:34 PM
Subject: Zenith701801-List: Re: HDPE fuel tanks
>
> So make the ribs and measure them before I give the guy the dimensions? As
> I was going to have them made to print, just out of HDPE, well I was going
> to make them slightly larger along the wing cord, but just a little.
> I like the screw on cover idea,anyone hear of this being done on a 701 or
> should I ask Zenith?
>
> --------
> Mark Twain: Twenty years from now you will be more disappointed by the
> things that you didn't do than by the ones you did do. So throw off the
> bowlines. Sail away from the safe harbor. Catch the trade winds in your
> sails. Explore. Dream. Discover.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=214046#214046
>
>
>
Message 5
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Here's a shot over the cowl on final to the country airport where we keep our 701...
We don't get many days of CAVU here in the Southeast.
Tommy Walker in Alabama
Do Not Archive
--------
Tommy Walker
N8701 - Anniston, AL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214169#214169
Attachments:
http://forums.matronics.com//files/25a_117.jpg
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Lot of tree's down there ... :)
Nice pic,
Jeff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214175#214175
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Thats beautiful looking country Tommy.
--------
CH 701
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214185#214185
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| Subject: | Re: HDPE fuel tanks |
Kevin, I'll be the first to admit that the Zenith welded tanks are not exactly
cheap. They are however very nicely welded and are extremely light. I have mine
installed in my scratch built wings and they fit perfectly as per the plans.
I am not familiar with HDPE as a material so I cannot comment as to it's suitability
for use as a fuel tank. Are there any issues realted to auto fuel campatability?
Also, one advantage to a metal fuel tank is the ability to ground it
during fueling. I would also expect that the plastic material would be heavier
than the 025 aluminum that the factory tanks are made from. As I mentioned
above, the factory tanks are extremely light.
Not trying to throw water on your idea, just wanted to add a couple of things to
think about. I personally felt that the purchased fuel tanks were well worth
what I paid for them.
Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
Do Not Archive
--- On Fri, 11/14/08, kmccune <kmccune@somtel.net> wrote:
> From: kmccune <kmccune@somtel.net>
> Subject: Zenith701801-List: Re: HDPE fuel tanks
> To: zenith701801-list@matronics.com
> Date: Friday, November 14, 2008, 7:27 AM
> "kmccune" <kmccune@somtel.net>
>
> I stumbled across a guy who does this as part of his
> regular business. I have not gotten a quot yet, I'm
> still asking questions. He claims they will be less
> expensive then the ones from Zenith? I don't want to
> outright post his contact info yet, because as of yet I have
> no proof of his product. Though he claims to have made them
> for Avids and such. We will see, I posted this to see if
> anyone with more experience in this type of thing had
> objections. It sounds as though he makes it out of sheet
> stock and thermal/hot air welds them together. Says he can
> help with windshield too, though the one from Zenith is
> kinda nice.
>
> Kevin
>
Message 9
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Thanks for the wallpaper Tommy
Randall J Hebert
Do Not Archive
Here's a shot over the cowl on final to the country airport where we
keep our 701...
We don't get many days of CAVU here in the Southeast.
Tommy Walker in Alabama
Do Not Archive
--------
Message 10
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| Subject: | Re: HDPE fuel tanks |
X-mailer: Pegasus Mail for Windows (4.41)
On a recent tour of the factory, I had the opportunity to pick up and hold a
completed 701 wing tank. I was amazed at how light it is. It weighs almost
nothing at all.
On 14 Nov 2008 at 7:11, MacDonald Doug wrote:
>
> Kevin, I'll be the first to admit that the Zenith welded tanks are not exactly
cheap. They are however very nicely welded and are extremely light. I have
mine installed in my scratch built wings and they fit perfectly as per the plans.
>
> I am not familiar with HDPE as a material so I cannot comment as to it's suitability
for use as a fuel tank. Are there any issues realted to auto fuel campatability?
Also, one advantage to a metal fuel tank is the ability to ground
it during fueling. I would also expect that the plastic material would be heavier
than the 025 aluminum that the factory tanks are made from. As I mentioned
above, the factory tanks are extremely light.
>
> Not trying to throw water on your idea, just wanted to add a couple of things
to think about. I personally felt that the purchased fuel tanks were well worth
what I paid for them.
>
> Doug MacDonald
> CH-701 Scratch Builder
> NW Ontario, Canada
>
> Do Not Archive
>
>
>
> --- On Fri, 11/14/08, kmccune <kmccune@somtel.net> wrote:
>
> > From: kmccune <kmccune@somtel.net>
> > Subject: Zenith701801-List: Re: HDPE fuel tanks
> > To: zenith701801-list@matronics.com
> > Date: Friday, November 14, 2008, 7:27 AM
> > "kmccune" <kmccune@somtel.net>
> >
> > I stumbled across a guy who does this as part of his
> > regular business. I have not gotten a quot yet, I'm
> > still asking questions. He claims they will be less
> > expensive then the ones from Zenith? I don't want to
> > outright post his contact info yet, because as of yet I have
> > no proof of his product. Though he claims to have made them
> > for Avids and such. We will see, I posted this to see if
> > anyone with more experience in this type of thing had
> > objections. It sounds as though he makes it out of sheet
> > stock and thermal/hot air welds them together. Says he can
> > help with windshield too, though the one from Zenith is
> > kinda nice.
> >
> > Kevin
> >
>
>
>
>
>
>
>
>
Message 11
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| Subject: | Re: HDPE fuel tanks |
Hmm... I don't know anything about that type of tank. The ones from Rans
appear to be injection molded translucent white plastic, kind of like a flat
jerry can, but I don't know the type of plastic. I haven't actually heard
of any Zenith tanks failing, after 10 years of lurking around these lists,
but I haven't done an archive search on the subject either.
On Fri, Nov 14, 2008 at 8:27 AM, kmccune <kmccune@somtel.net> wrote:
>
> I stumbled across a guy who does this as part of his regular business. I
> have not gotten a quot yet, I'm still asking questions. He claims they
> will be less expensive then the ones from Zenith? I don't want to outright
> post his contact info yet, because as of yet I have no proof of his product.
> Though he claims to have made them for Avids and such. We will see, I posted
> this to see if anyone with more experience in this type of thing had
> objections. It sounds as though he makes it out of sheet stock and
> thermal/hot air welds them together. Says he can help with windshield too,
> though the one from Zenith is kinda nice.
>
> Kevin
>
> --------
> Mark Twain: Twenty years from now you will be more disappointed by the
> things that you didn't do than by the ones you did do. So throw off the
> bowlines. Sail away from the safe harbor. Catch the trade winds in your
> sails. Explore. Dream. Discover.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=214160#214160
>
>
Message 12
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| Subject: | Re: HDPE fuel tanks |
Yes, they are really lightweight, and despite the trouble of shoehoring them
in, I haven't had a bit of trouble with them! Be sure to get the whole wing
bay ready in case you can't get them out like I did. Your first fitting may
be your last! Hah!
----- Original Message -----
From: "Ken Ryan" <kenryan@alaska.net>
Sent: Friday, November 14, 2008 10:05 AM
Subject: Re: Zenith701801-List: Re: HDPE fuel tanks
>
> On a recent tour of the factory, I had the opportunity to pick up and hold
> a
> completed 701 wing tank. I was amazed at how light it is. It weighs almost
> nothing at all.
>
>
> On 14 Nov 2008 at 7:11, MacDonald Doug wrote:
>
>> <dougsnash@yahoo.com>
>>
>> Kevin, I'll be the first to admit that the Zenith welded tanks are not
>> exactly cheap. They are however very nicely welded and are extremely
>> light. I have mine installed in my scratch built wings and they fit
>> perfectly as per the plans.
>>
>> I am not familiar with HDPE as a material so I cannot comment as to it's
>> suitability for use as a fuel tank. Are there any issues realted to auto
>> fuel campatability? Also, one advantage to a metal fuel tank is the
>> ability to ground it during fueling. I would also expect that the plastic
>> material would be heavier than the 025 aluminum that the factory tanks
>> are made from. As I mentioned above, the factory tanks are extremely
>> light.
>>
>> Not trying to throw water on your idea, just wanted to add a couple of
>> things to think about. I personally felt that the purchased fuel tanks
>> were well worth what I paid for them.
>>
>> Doug MacDonald
>> CH-701 Scratch Builder
>> NW Ontario, Canada
>>
>> Do Not Archive
>>
>>
>>
>> --- On Fri, 11/14/08, kmccune <kmccune@somtel.net> wrote:
>>
>> > From: kmccune <kmccune@somtel.net>
>> > Subject: Zenith701801-List: Re: HDPE fuel tanks
>> > To: zenith701801-list@matronics.com
>> > Date: Friday, November 14, 2008, 7:27 AM
>> > "kmccune" <kmccune@somtel.net>
>> >
>> > I stumbled across a guy who does this as part of his
>> > regular business. I have not gotten a quot yet, I'm
>> > still asking questions. He claims they will be less
>> > expensive then the ones from Zenith? I don't want to
>> > outright post his contact info yet, because as of yet I have
>> > no proof of his product. Though he claims to have made them
>> > for Avids and such. We will see, I posted this to see if
>> > anyone with more experience in this type of thing had
>> > objections. It sounds as though he makes it out of sheet
>> > stock and thermal/hot air welds them together. Says he can
>> > help with windshield too, though the one from Zenith is
>> > kinda nice.
>> >
>> > Kevin
>> >
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 13
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| Subject: | Re: HDPE fuel tanks |
Rotationally molded cross linked PE is widely used in fuel and other storage tanks.
HD linear PE that is fabbed from sheets and thermo -welded may be a little
iffy. You can get a lot of good info by simply checking out PE FuelTanks.
A 1/4 inch wall manufactured tank might be available from regular sources of after
market auto products. They do have a temperature limit which may not be a
consideration for your use. I'm not sure the PE would be lighter than aluminum
though.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214220#214220
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Thanks for sharing. Makes me want to go flying.
--------
22 hours of FLIGHT time.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214221#214221
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Randall,
Yes, it is my wallpaper too.
Sorry we didn't get to meet in September.
Tommy
Do Not Archive
randy(at)rjhebertassoc.co wrote:
> Thanks for the wallpaper Tommy
>
> Randall J Hebert
>
> Do Not Archive
>
>
> Here's a shot over the cowl on final to the country airport where we
> keep our 701...
> We don't get many days of CAVU here in the Southeast.
>
> Tommy Walker in Alabama
> Do Not Archive
>
> --------
--------
Tommy Walker
N8701 - Anniston, AL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214223#214223
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The trip has been delayed until March or April. I'll try then.
Randall J Hebert
Do Not Archive
Message 17
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| Subject: | Re: HDPE fuel tanks |
Two other options that might be useful pop up in my feeble mind.
For the scratch builders it would be a simple matter to trace out the main
rib form block on a piece of paper and remove 1/8" (or whatever you feel
comfortable with), make a couple of ribs for the ends and sheet over with
025, sealing everything up with proseal. My RV3 tanks have lasted 30 plus
yrs and 2000 hrs with only one leak.
Another thought , I'm giving SERIOUS thought to this , is just making that
wing bay wet by sealing up the ribs, spar, skins, I will put the opening on
the bottom to keep the top lifting surface as clean as possible. Top and
bottom skins will be 025 in this area. Advantages are , lighter, cheaper,
easier to build and will carry more fuel for the space used. Haven't passed
it by my aero engineer buddies yet but considering the fuel was there anyway
I don't THINK there will be much to change, BUT I'm wrong a lot so we'll
see.
LO&SLO John
----- Original Message -----
From: "MacDonald Doug" <dougsnash@yahoo.com>
Sent: Friday, November 14, 2008 9:11 AM
Subject: Re: Zenith701801-List: Re: HDPE fuel tanks
> <dougsnash@yahoo.com>
>
> Kevin, I'll be the first to admit that the Zenith welded tanks are not
> exactly cheap. They are however very nicely welded and are extremely
> light. I have mine installed in my scratch built wings and they fit
> perfectly as per the plans.
>
Message 18
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| Subject: | Re: 701 Wet Wing (Was HDPE fuel tanks) |
John, I know of a builder near me that is planning on going with a wet wing in
his 701. He has previously built a RV-6 so has expirience with this concept.
I believe that he has Zenair/Chris Heintz approval for his modificatons. I recall
they include heavier skins and stiffening grooves in the rib webs but I
don't remember what else was involved.
Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
Do Not Archive
--- On Fri, 11/14/08, John Bolding <jnbolding1@teleshare.net> wrote:
> From: John Bolding <jnbolding1@teleshare.net>
> Subject: Re: Zenith701801-List: Re: HDPE fuel tanks
> To: zenith701801-list@matronics.com
> Date: Friday, November 14, 2008, 1:04 PM
> Bolding" <jnbolding1@teleshare.net>
>
> Two other options that might be useful pop up in my feeble
> mind.
>
> For the scratch builders it would be a simple matter to
> trace out the main rib form block on a piece of paper and
> remove 1/8" (or whatever you feel comfortable with),
> make a couple of ribs for the ends and sheet over with 025,
> sealing everything up with proseal. My RV3 tanks have
> lasted 30 plus yrs and 2000 hrs with only one leak.
>
> Another thought , I'm giving SERIOUS thought to this ,
> is just making that wing bay wet by sealing up the ribs,
> spar, skins, I will put the opening on the bottom to keep
> the top lifting surface as clean as possible. Top and bottom
> skins will be 025 in this area. Advantages are , lighter,
> cheaper, easier to build and will carry more fuel for the
> space used. Haven't passed it by my aero engineer
> buddies yet but considering the fuel was there anyway I
> don't THINK there will be much to change, BUT I'm
> wrong a lot so we'll see.
>
> LO&SLO John
>
Message 19
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| Subject: | 7R2-3 Rudder horn thickness |
Can someone give me the 701 rudder horn thickness? I'm scrounging
through a pile of 6061-T6 scrap and don't have my plans in front of me.
Many thanks in advance
DO NOT ARCHIVE
Bob Percival
701/Vair - finally getting off my dime and building!
Message 20
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| Subject: | Re: HDPE fuel tanks |
Attached is a picture of one of the two tanks I made. I'm scratch building
and made form blocks a little shorter than the wing form blocks. I put a
baffle in the middle to keep the full tank from bulging. I was going to
make the tank deeper but decided I didn't want to mess with the CG. The cap
is an ACS flush mount model. There is an aluminum block in the corner where
the fuel outlet is and the drain plug is also in that area. The vent line
will run up from the bottom in the corner where the cap is (I riveted a 1/4"
aluminum plate and threaded in for an 1/8" NPT fitting). The fuel sender is
the normal one and I got it from an off-road-vehicle supply house. I made a
new ring with threaded holes for the sender to bolt onto and Pro-Sealed it
to the inside of the tank; this was so I could have a larger area for the
sender gasket to seal. There is also a fitting next to the sender for the
fuel return if I go that route (hot fuel system?). Used "closed end"
rivets. I pressure tested it for several days using the balloon method.
The tank is completely enclosed in the wing (not a wet tank system). I put
cork strips between the tank and the skin. I just finished riveting the
wings yesterday (anyone have a cure for hand cramping?).
BTW, I found out that you can clean up Proseal with lacquer thinner.
Curt
Redmond, WA, USA
Scratch building CH701
-----Original Message-----
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of John
Bolding
Sent: Friday, November 14, 2008 11:04 AM
Subject: Re: Zenith701801-List: Re: HDPE fuel tanks
<jnbolding1@teleshare.net>
Two other options that might be useful pop up in my feeble mind.
For the scratch builders it would be a simple matter to trace out the main
rib form block on a piece of paper and remove 1/8" (or whatever you feel
comfortable with), make a couple of ribs for the ends and sheet over with
025, sealing everything up with proseal. My RV3 tanks have lasted 30 plus
yrs and 2000 hrs with only one leak.
Another thought , I'm giving SERIOUS thought to this , is just making that
wing bay wet by sealing up the ribs, spar, skins, I will put the opening on
the bottom to keep the top lifting surface as clean as possible. Top and
bottom skins will be 025 in this area. Advantages are , lighter, cheaper,
easier to build and will carry more fuel for the space used. Haven't passed
it by my aero engineer buddies yet but considering the fuel was there anyway
I don't THINK there will be much to change, BUT I'm wrong a lot so we'll
see.
LO&SLO John
Message 21
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| Subject: | Re: 7R2-3 Rudder horn thickness |
The Rudder horn is .090 thick.
--------
CH 701
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214256#214256
Message 22
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| Subject: | Re: 7R2-3 Rudder horn thickness |
Thanks Harvey
do not archive
________________________________
From: owner-zenith701801-list-server@matronics.com on behalf of Harvey
Richards
Sent: Fri 11/14/2008 3:14 PM
Subject: Zenith701801-List: Re: 7R2-3 Rudder horn thickness
<lisa.richards@ns.sympatico.ca>
The Rudder horn is .090 thick.
--------
CH 701
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214256#214256
Message 23
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| Subject: | Re: HDPE fuel tanks |
Thanks for all the replies, I know it would be heavier then the AL ones, but I
don't what to learn to weld AL just for these tanks and I don't want to pay Zenith
the asking price for them. I had not considered the grounding issue. What
do they do in this case?
I do like the idea of two "Ribs" with pro-seal though, as one of the reasons for
looking for something else, was to get about 24 gallons total. 30 years John,
thats good enough for me!
Curt,
I really like that tank, what are closed ended rivets? I assume they are not solid
rivets, because you would not be able to set the second side. I also assume
that you used pro-seal on the joints?
Thanks
Again
--------
Mark Twain: Twenty years from now you will be more disappointed by the things that
you didn't do than by the ones you did do. So throw off the bowlines. Sail
away from the safe harbor. Catch the trade winds in your sails. Explore. Dream.
Discover.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=214268#214268
Message 24
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| Subject: | Re: HDPE fuel tanks |
In plastic fuel cans there is a brass pad on the bottom similar to a rivet
that is in contact with the fuel and terra firma when you are filling it. (At
least when the govt. buys them.) I would surmise that a similar installation
with bonding it to the airframe would work. Only surmising here, your mileage
may vary. I would also want to think that the ground to the airframe would
be a text book example. And not really knowing, maybe being enclosed in the
wing would diminish all of the difference in potential.
Joe Motis
do not archive
In a message dated 11/14/2008 2:47:40 P.M. Pacific Standard Time,
kmccune@somtel.net writes:
I had not considered the grounding issue. What do they do in this case?
**************Get the Moviefone Toolbar. Showtimes, theaters, movie news &
p://toolbar.aol.com/moviefone/download.html?ncid=emlcntusdown00000001)
Message 25
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| Subject: | Re: HDPE fuel tanks |
Greetings,
Has anyone considered making the tanks out of stainless steel or some
other material besides aluminum? I have seen corrosion problems in boats
with aluminum fuel tanks that make me seriously search for alternatives.
Raymond Julian
Kettle River, MN
"Hope for the best,
but prepare for the worst."
do not archive
----- Original Message -----
From: "Curt Thompson" <Curt.Thompson@verizon.net>
Sent: Friday, November 14, 2008 4:06 PM
Subject: RE: Zenith701801-List: Re: HDPE fuel tanks
> Attached is a picture of one of the two tanks I made. I'm scratch
> building
> and made form blocks a little shorter than the wing form blocks. I put a
> baffle in the middle to keep the full tank from bulging. I was going to
> make the tank deeper but decided I didn't want to mess with the CG. The
> cap
> is an ACS flush mount model. There is an aluminum block in the corner
> where
> the fuel outlet is and the drain plug is also in that area. The vent line
> will run up from the bottom in the corner where the cap is (I riveted a
> 1/4"
> aluminum plate and threaded in for an 1/8" NPT fitting). The fuel sender
> is
> the normal one and I got it from an off-road-vehicle supply house. I made
> a
> new ring with threaded holes for the sender to bolt onto and Pro-Sealed it
> to the inside of the tank; this was so I could have a larger area for the
> sender gasket to seal. There is also a fitting next to the sender for the
> fuel return if I go that route (hot fuel system?). Used "closed end"
> rivets. I pressure tested it for several days using the balloon method.
> The tank is completely enclosed in the wing (not a wet tank system). I
> put
> cork strips between the tank and the skin. I just finished riveting the
> wings yesterday (anyone have a cure for hand cramping?).
>
> BTW, I found out that you can clean up Proseal with lacquer thinner.
>
> Curt
> Redmond, WA, USA
> Scratch building CH701
>
>
> -----Original Message-----
> From: owner-zenith701801-list-server@matronics.com
> [mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of John
> Bolding
> Sent: Friday, November 14, 2008 11:04 AM
> To: zenith701801-list@matronics.com
> Subject: Re: Zenith701801-List: Re: HDPE fuel tanks
>
> <jnbolding1@teleshare.net>
>
> Two other options that might be useful pop up in my feeble mind.
>
> For the scratch builders it would be a simple matter to trace out the main
> rib form block on a piece of paper and remove 1/8" (or whatever you feel
> comfortable with), make a couple of ribs for the ends and sheet over with
> 025, sealing everything up with proseal. My RV3 tanks have lasted 30 plus
> yrs and 2000 hrs with only one leak.
>
> Another thought , I'm giving SERIOUS thought to this , is just making that
> wing bay wet by sealing up the ribs, spar, skins, I will put the opening
> on
> the bottom to keep the top lifting surface as clean as possible. Top and
> bottom skins will be 025 in this area. Advantages are , lighter, cheaper,
> easier to build and will carry more fuel for the space used. Haven't
> passed
>
> it by my aero engineer buddies yet but considering the fuel was there
> anyway
>
> I don't THINK there will be much to change, BUT I'm wrong a lot so we'll
> see.
>
> LO&SLO John
>
>
--------------------------------------------------------------------------------
Checked by AVG - http://www.avg.com
7:32 PM
Message 26
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| Subject: | Re: HDPE fuel tanks |
I got the Closed End Blind Rivets from here:
http://www.hansonrivet.com/w22.htm
The part number is: PASD401H ($58.54 / 1000)
I also got some PASD403H ($13.22 / 100) to attach the flanges.
I think ACS sells something like this too.
Curt
-----Original Message-----
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of kmccune
Sent: Friday, November 14, 2008 2:47 PM
Subject: Zenith701801-List: Re: HDPE fuel tanks
Thanks for all the replies, I know it would be heavier then the AL ones, but
I don't what to learn to weld AL just for these tanks and I don't want to
pay Zenith the asking price for them. I had not considered the grounding
issue. What do they do in this case?
I do like the idea of two "Ribs" with pro-seal though, as one of the reasons
for looking for something else, was to get about 24 gallons total. 30 years
John, thats good enough for me!
Curt,
I really like that tank, what are closed ended rivets? I assume they are
not solid rivets, because you would not be able to set the second side. I
also assume that you used pro-seal on the joints?
Thanks
Again
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