Today's Message Index:
----------------------
1. 03:26 AM - Stars and Bars Mike Gross, Etters Penneylvania (Mike Hoffman)
2. 08:23 AM - Re:Prince P-tip propeller (Chuck Deiterich)
3. 11:06 AM - Re: Needed: Zenith 701 gascolator 7E4-2 (sonar1@cox.net)
4. 12:32 PM - 701 fuel system design (Craig Payne)
5. 02:23 PM - Chat Room Reminder For "Digesters" (George Race)
6. 04:38 PM - Re: Needed: Zenith 701 gascolator 7E4-2 (Les Goldner)
7. 04:51 PM - Re: 701 fuel system design (Les Goldner)
Message 1
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| Subject: | Stars and Bars Mike Gross, Etters Penneylvania |
I saw a picture of Mike Gross's airplane on the Zenith web site and I would like
to contact Mike to see who made the stars and bars for his plane. Does anyone
have an e-mail address address for him. If I cant get an e-mail address, I'll
try and call him.
Thank you
Mike Hoffman
mhoffman9@tampabay.rr.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=243373#243373
Message 2
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| Subject: | Re:Prince P-tip propeller |
Benjamin,
I have a 701 with a Jab 2200 and a Prince P-Tip prop. 64x26. Greater than
64 inches may give you tip drag as the tip speed approaches mach 0.9 at 3300
rpm. I think my prop is a bit under pitched. Recently I researched what
others are using on similar airplanes and a Jab 2200. I tried a Tenn prop
64x34. As expected, my takeoff roll increased, but the climb rate was cut
in half and only gained 2 or 3 mph in cruise. FOr now the Prince is going
back on.
Chuck D.
N701TX
> Subject: Zenith701801-List: Prince P-tip propeller
> From: "Benjamin Q" <ben.queener@gmail.com>
>
>
> I am going to put a Jabiru 2200 on my 701. I have been looking into using
> a Prince
> P-tip propeller. Supposedly the p-tip allows a blade of smaller diameter
> to be as effective as a larger propeller because the tips "delays the tip
> vorticies
> which cause drag and turbulence within the propeller arc." They also
> claim
> that "a 72" diameter propeller without a P-TIP will give a volume of air
> from the propeller of approximately 68" in diameter; a P-TIP propeller
> will provide
> 72" of air volume."
> Additionally the propellers are said to include automatic pitch
> changing.
> "The propeller has a fixed pitch that relies on the forward pull of the
> propeller
> to automatically provide pitch change proportional to the amount of force
> being applied to the propeller disk."
> I have looked for information on some of the forums and the few that
> have the
> propeller seem to think that they give modest increases in performance and
> efficiency.
>
Message 3
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| Subject: | Re: Needed: Zenith 701 gascolator 7E4-2 |
Craig:
You can have my old one. I didn't like Zenith's design because it had no screen,
and no cleanout, and because I had some feeding problems - one tank emptying
before the other one started feeding. Turns out the feeding problem was small
bubbles in the line - nothing to do with the gascolator.
I first flew in 2005, and went through several design transitions in the fuel system.
I feel that I now have the best possible. I run both fuel lines to valves at the
pilot's seat, where I can select either tank or both, and then have one line
that goes through the firewall to an Aircraft Spruce gascolator and then to
the fuel filter to the engine. I first used one of those small plastic fuel filters
from Spruce, but had it clog up with "lint" from somewhere and ended up
landing in a disked cotton field, and so now I have a LARGE fuel filter. I feel
that my fuel system is perfect........ Fred Sanford N9701
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=243407#243407
Message 4
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| Subject: | 701 fuel system design |
I've seen a number of different fuel system designs on 701s. My big worries
are the placement of the fuel valve(s) and the gascolator. I want the
capability to select left, right or both to be able to control uneven flow.
Normally I would fly with "both" but switch to left or right if one tank was
draining faster. I'd also prefer the gascolator(s) to be where the Zenith
plans call for them (behind seats) as I'd like a gascolator to be at the
actual low point in the system. I know that some builders place their
gascolators on the firewall as a localized low point. But with the
gascolator forward I just don't see how you will ever get water or junk out
of the other low points in the system.
I'd like a "real" gascolator but placed where the plans call for the Zenith
"box". But it is tricky to mount a conventional gascolator there such that
you can drain it and open it for cleaning,
Places I have seen valves with pros and cons:
- Zenith design with off/on valve on floor by flap handle. Pros: single
gascolator behind seats, don't need access to valve during flight. Cons: no
"both" position.
- behind copilot's head towards the top off the outside wall. Pros: short
runs on lines from individual tanks, single "down" line to a single
gascolator. Cons: awkward to reach.
- centered on crossbar behind and above pilot and copilot just below roof.
Pros and cons are like above.
- on floor near flap handle. Pros better (but not great) access. I've got
chunky thighs and reaching (let alone seeing) the valve is hard. Not an
issue with an off/on valve but more important with a left-both-right valve.
Cons: two gascolators behind seats.
- on panel. Pros: good access to, and visibility of valve handle. Cons:
probably need actual valve on firewall with extension to panel.
One interesting idea I saw (N701RR?) is to not run the line(s) down, behind
the seats and then forward. Instead run them forward from the wing roots and
then down the diagonal steel tubes to the glare shield and firewall.
How have others thought this through?
-- Craig
Message 5
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| Subject: | Chat Room Reminder For "Digesters" |
Live Chat Room every Monday evening around 8:00 EDT
www.mykitairplane.com
<blocked::blocked::blocked::http://www.mykitairplane.com/>
Click on the Chat Room link on the page.
George
"Check Out My New Access Opening Kit"
Do Not Archive
Message 6
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| Subject: | Needed: Zenith 701 gascolator 7E4-2 |
Craig,
I used a single gascolator but my kit came with two. Find out what Zenith
charges (it's just a sealed aluminum box with a few threaded openings and
couldn't be very expensive) and I will give it to you for half their price.
Never used, but no warrantee.
Les
-----Original Message-----
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Craig
Payne
Sent: Saturday, May 09, 2009 3:15 PM
Subject: Zenith701801-List: Needed: Zenith 701 gascolator 7E4-2
<craig@craigandjean.com>
Does anyone have one they are not planning on using? I know I can buy one
from Zenith but I figure I can get a surplus one from another builder for
less. Let me know a price.
-- Craig
Message 7
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| Subject: | 701 fuel system design |
Craig,
My kit came with 4 tanks (40 Gal) and I did not like the idea of routing the
fuel lines and gascolator behind the seat where I would not be able to
detect leaks.
I am pleased with my installation. I ran the lines from the tanks to the
forward wing root on each side where I put selector valve with inside tank,
outside tank, and off positions. From their I ran the stainless mesh covered
fuel lines down and forward to the fire wall along the steel frame at the
sides of the windshield. I placed the gascolator forward of the firewall on
the bottom-most part of the firewall away from the exhaust system. I was
concerned about potential vapor lock, but a week of flying in 100+ degree
weather in Death Valley and Nevada & Arizona high desert dispelled this
concern.
If I has only a single tank in each wing I would use the same setup with an
on-off selector switch on each wing root. Simple and safe.
Les
-----Original Message-----
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Craig
Payne
Sent: Sunday, May 10, 2009 12:23 PM
Subject: Zenith701801-List: 701 fuel system design
<craig@craigandjean.com>
I've seen a number of different fuel system designs on 701s. My big worries
are the placement of the fuel valve(s) and the gascolator. I want the
capability to select left, right or both to be able to control uneven flow.
Normally I would fly with "both" but switch to left or right if one tank was
draining faster. I'd also prefer the gascolator(s) to be where the Zenith
plans call for them (behind seats) as I'd like a gascolator to be at the
actual low point in the system. I know that some builders place their
gascolators on the firewall as a localized low point. But with the
gascolator forward I just don't see how you will ever get water or junk out
of the other low points in the system.
I'd like a "real" gascolator but placed where the plans call for the Zenith
"box". But it is tricky to mount a conventional gascolator there such that
you can drain it and open it for cleaning,
Places I have seen valves with pros and cons:
- Zenith design with off/on valve on floor by flap handle. Pros: single
gascolator behind seats, don't need access to valve during flight. Cons: no
"both" position.
- behind copilot's head towards the top off the outside wall. Pros: short
runs on lines from individual tanks, single "down" line to a single
gascolator. Cons: awkward to reach.
- centered on crossbar behind and above pilot and copilot just below roof.
Pros and cons are like above.
- on floor near flap handle. Pros better (but not great) access. I've got
chunky thighs and reaching (let alone seeing) the valve is hard. Not an
issue with an off/on valve but more important with a left-both-right valve.
Cons: two gascolators behind seats.
- on panel. Pros: good access to, and visibility of valve handle. Cons:
probably need actual valve on firewall with extension to panel.
One interesting idea I saw (N701RR?) is to not run the line(s) down, behind
the seats and then forward. Instead run them forward from the wing roots and
then down the diagonal steel tubes to the glare shield and firewall.
How have others thought this through?
-- Craig
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