Today's Message Index:
----------------------
1. 04:18 AM - 701 top mount fuel sender (Gordon)
2. 07:00 AM - Re: Aux fuel pump in 701 (Jim Hoak)
3. 07:15 AM - Re: 701 top mount fuel sender (Hinde, Frank George (Corvallis))
4. 07:24 AM - Re: Aux fuel pump in 701 (Larry)
5. 07:26 AM - Re: Aux fuel pump in 701 (Hinde, Frank George (Corvallis))
6. 07:47 AM - Re: Aux fuel pump in 701 (Hinde, Frank George (Corvallis))
7. 08:51 AM - Do I need a primer system on my (Keystone Engineering LLC)
8. 10:43 AM - Re: 701 top mount fuel sender (ROBERT SCEPPA)
9. 12:33 PM - Re: Aux fuel pump in 701 (Bryan Martin)
10. 04:20 PM - Aux fuel pump (neitzel)
11. 04:37 PM - Re: Aux fuel pump in 701 (Tim & Diane Shankland)
12. 05:23 PM - Re: Aux fuel pump in 701 (Craig Payne)
13. 06:12 PM - Re: Aux fuel pump in 701 (William Jeffries)
14. 08:55 PM - Re: Another website up (Gary Gower)
15. 10:01 PM - Re: Aux fuel pump in 701. (Gary Gower)
16. 10:27 PM - Re: Aux fuel pump (Gary Gower)
Message 1
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| Subject: | 701 top mount fuel sender |
--> Zenith-List message posted by: "Gordon" <cscsail@gmavt.net>
Tommy,
I got the washers from a local diesel engine repair business. The washers are commonly
used on fuel connections like banjo fittings, but I'm sure there are other
sources.
Gordon
Do you know where I could order some of the copper washers you mentioned?
Thanks,
Tommy Walker
Message 2
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| Subject: | Re: Aux fuel pump in 701 |
--> Zenith-List message posted by: "Jim Hoak" <planejim@bellsouth.net>
George,
I have 601Hd fuel system plumbed as you described. I use auto gas
exclusively. It has worked fine for 9 years (500.3 hours). I use the
electric pump for T/O and landing (in case of a go around) in case the
mechanical pump dies at the wrong time. The only question I have is the
pressure you mentioned. My engine driven (Rotax 912UL) pump and the
electric pump both put out around 5 Psi NOT 25 to 45 psi as you mentioned.
My elec. pump is a Facet and I don't use a "check valve" in the system. I
just checked my purchase records but the receipt doesn't mention the part
number and the airplane is miles from home. I plumbed the electric pump in
"parrallel" with the engine pump and it works fine.
Good luck.
Jim Hoak 601HD 500.3 hrs.
----- Original Message -----
From: <george.mueller@aurora.org>
Sent: Tuesday, February 21, 2006 12:56 PM
Subject: Zenith-List: Aux fuel pump in 701
> --> Zenith-List message posted by: george.mueller@aurora.org
>
>
> I am thinking about the fuel system in my 701 and am considering putting
> in
> a facet fuel pump as a booster pump The pump I am considering is an
> FP40105 which doesn't have a check valve and puts out 25 to 45 PSI (my
> understanding is the Rotax 912 can handle a max pressure of 58psi) This
> pump would be used to avoid vapor lock on take off and as an aux pump if
> the mechanical pump on the Rotax fails I would install the pump after the
> gascolator and after an in line fuel filter, basically next to the
> gascolator Are there any problems that anyone can see with such an
> installation? I am concerned with the greater likelihood of vapor lock
> with auto gas
>
>
> George
>
>
>
Message 3
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| Subject: | 701 top mount fuel sender |
--> Zenith-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
Check out you local autoparts store, or even some good hardware stores
have the trays of little stuff. Never ceases to amaze me what I find in
these places.
My local Knects has copper washers.
Frank
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Gordon
Sent: Thursday, February 23, 2006 4:12 AM
Subject: Zenith-List: 701 top mount fuel sender
--> Zenith-List message posted by: "Gordon" <cscsail@gmavt.net>
Tommy,
I got the washers from a local diesel engine repair business. The
washers are commonly used on fuel connections like banjo fittings, but
I'm sure there are other sources.
Gordon
Do you know where I could order some of the copper washers you
mentioned?
Thanks,
Tommy Walker
Message 4
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| Subject: | Re: Aux fuel pump in 701 |
--> Zenith-List message posted by: "Larry" <lrm01@centurytel.net>
If you have a gravity feed system, a carbed engine, and no mechanical pump
then you should have an aux electric pump, no more than 6 psi to use for T/O
and other climbs. It is entirely possible that your carb bowl which is
normally pretty small can get higher that your tank. Thus no more gas
unless you pump it. I'm talking high wing. I intend to run a primary pump
all the time with a second backup aux pump. It's just something else not to
have to remember to turn on and off. And in the remote event the primary
pump fails, the pressure gauge will fall off but it will still gravity feed
thru the pump. I can switch on the aux pump if needed.
Larry, N1345L, www.skyhawg.com
----- Original Message -----
From: "Jim Hoak" <planejim@bellsouth.net>
Sent: Thursday, February 23, 2006 8:52 AM
Subject: Re: Zenith-List: Aux fuel pump in 701
> --> Zenith-List message posted by: "Jim Hoak" <planejim@bellsouth.net>
>
> George,
>
> I have 601Hd fuel system plumbed as you described. I use auto gas
> exclusively. It has worked fine for 9 years (500.3 hours). I use the
> electric pump for T/O and landing (in case of a go around) in case the
> mechanical pump dies at the wrong time. The only question I have is the
> pressure you mentioned. My engine driven (Rotax 912UL) pump and the
> electric pump both put out around 5 Psi NOT 25 to 45 psi as you mentioned.
> My elec. pump is a Facet and I don't use a "check valve" in the system. I
> just checked my purchase records but the receipt doesn't mention the part
> number and the airplane is miles from home. I plumbed the electric pump in
> "parrallel" with the engine pump and it works fine.
>
> Good luck.
>
> Jim Hoak 601HD 500.3 hrs.
> ----- Original Message -----
> From: <george.mueller@aurora.org>
> To: <zenith-list@matronics.com>
> Sent: Tuesday, February 21, 2006 12:56 PM
> Subject: Zenith-List: Aux fuel pump in 701
>
>
>> --> Zenith-List message posted by: george.mueller@aurora.org
>>
>>
>>
>> I am thinking about the fuel system in my 701 and am considering putting
>> in
>> a facet fuel pump as a booster pump The pump I am considering is an
>> FP40105 which doesn't have a check valve and puts out 25 to 45 PSI (my
>> understanding is the Rotax 912 can handle a max pressure of 58psi) This
>> pump would be used to avoid vapor lock on take off and as an aux pump if
>> the mechanical pump on the Rotax fails I would install the pump after
>> the
>> gascolator and after an in line fuel filter, basically next to the
>> gascolator Are there any problems that anyone can see with such an
>> installation? I am concerned with the greater likelihood of vapor lock
>> with auto gas
>>
>>
>>
>>
>> George
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
>
>
Message 5
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| Subject: | Aux fuel pump in 701 |
--> Zenith-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
I'm sure it does but what are the failure modes of this set up?
Is there something that could happen to the mechanical pump that
prevents the Facet from being a reliable backup?.... If the pump
diaphram were to rupture would it allow the fuel to backflow (either
back into the tank or inside the cowl)? I don't know the answer to these
questions but you can't simply write off the issue as "works fine" until
you understand how each component might fail and affect the system
performance.
Taking my scenario above for instance, a failed mechanical pump would
not only allow the engine to quit, it could also be a very big fire
hazard!
For us to recommend this setup we need to know a little more I think
Frank
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Jim Hoak
Sent: Thursday, February 23, 2006 6:52 AM
Subject: Re: Zenith-List: Aux fuel pump in 701
--> Zenith-List message posted by: "Jim Hoak" <planejim@bellsouth.net>
George,
I have 601Hd fuel system plumbed as you described. I use auto gas
exclusively. It has worked fine for 9 years (500.3 hours). I use the
electric pump for T/O and landing (in case of a go around) in case the
mechanical pump dies at the wrong time. The only question I have is the
pressure you mentioned. My engine driven (Rotax 912UL) pump and the
electric pump both put out around 5 Psi NOT 25 to 45 psi as you
mentioned.
My elec. pump is a Facet and I don't use a "check valve" in the system.
I just checked my purchase records but the receipt doesn't mention the
part number and the airplane is miles from home. I plumbed the electric
pump in "parrallel" with the engine pump and it works fine.
Good luck.
Jim Hoak 601HD 500.3 hrs.
----- Original Message -----
From: <george.mueller@aurora.org>
Sent: Tuesday, February 21, 2006 12:56 PM
Subject: Zenith-List: Aux fuel pump in 701
> --> Zenith-List message posted by: george.mueller@aurora.org
>
>
> I am thinking about the fuel system in my 701 and am considering
putting
> in
> a facet fuel pump as a booster pump The pump I am considering is an
> FP40105 which doesn't have a check valve and puts out 25 to 45 PSI (my
> understanding is the Rotax 912 can handle a max pressure of 58psi)
This
> pump would be used to avoid vapor lock on take off and as an aux pump
if
> the mechanical pump on the Rotax fails I would install the pump after
the
> gascolator and after an in line fuel filter, basically next to the
> gascolator Are there any problems that anyone can see with such an
> installation? I am concerned with the greater likelihood of vapor
lock
> with auto gas
>
>
> George
>
>
>
Message 6
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| Subject: | Aux fuel pump in 701 |
--> Zenith-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
That's a wild looking cowling on that 701...Looks cool!
Not so sure I like the idea of your single pump...Do you know for sure
that you will get full fuel flow through a dead Facet fuel pump?
Why not simply run two of them in parallel. You can leave them running
all the time or turn both of them on just for TO and landing. A pair of
40105 Facets in parallel will not jack the fuel pressure any higher than
a single pump and I think there will be enough flow from each pump to
overcome the backflow thru the dead pump...If not you could always put
two check valves in or buy the pump with check valves...(model number
escapes me at present)
Nice plane!
Frank
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Larry
Sent: Thursday, February 23, 2006 7:20 AM
Subject: Re: Zenith-List: Aux fuel pump in 701
--> Zenith-List message posted by: "Larry" <lrm01@centurytel.net>
If you have a gravity feed system, a carbed engine, and no mechanical
pump then you should have an aux electric pump, no more than 6 psi to
use for T/O
and other climbs. It is entirely possible that your carb bowl which is
normally pretty small can get higher that your tank. Thus no more gas
unless you pump it. I'm talking high wing. I intend to run a primary
pump
all the time with a second backup aux pump. It's just something else
not to
have to remember to turn on and off. And in the remote event the
primary
pump fails, the pressure gauge will fall off but it will still gravity
feed thru the pump. I can switch on the aux pump if needed.
Larry, N1345L, www.skyhawg.com
----- Original Message -----
From: "Jim Hoak" <planejim@bellsouth.net>
Sent: Thursday, February 23, 2006 8:52 AM
Subject: Re: Zenith-List: Aux fuel pump in 701
> --> Zenith-List message posted by: "Jim Hoak" <planejim@bellsouth.net>
>
> George,
>
> I have 601Hd fuel system plumbed as you described. I use auto gas
> exclusively. It has worked fine for 9 years (500.3 hours). I use the
> electric pump for T/O and landing (in case of a go around) in case the
> mechanical pump dies at the wrong time. The only question I have is
the
> pressure you mentioned. My engine driven (Rotax 912UL) pump and the
> electric pump both put out around 5 Psi NOT 25 to 45 psi as you
mentioned.
> My elec. pump is a Facet and I don't use a "check valve" in the
system. I
> just checked my purchase records but the receipt doesn't mention the
part
> number and the airplane is miles from home. I plumbed the electric
pump in
> "parrallel" with the engine pump and it works fine.
>
> Good luck.
>
> Jim Hoak 601HD 500.3 hrs.
> ----- Original Message -----
> From: <george.mueller@aurora.org>
> To: <zenith-list@matronics.com>
> Sent: Tuesday, February 21, 2006 12:56 PM
> Subject: Zenith-List: Aux fuel pump in 701
>
>
>> --> Zenith-List message posted by: george.mueller@aurora.org
>>
>>
>>
>> I am thinking about the fuel system in my 701 and am considering
putting
>> in
>> a facet fuel pump as a booster pump The pump I am considering is an
>> FP40105 which doesn't have a check valve and puts out 25 to 45 PSI
(my
>> understanding is the Rotax 912 can handle a max pressure of 58psi)
This
>> pump would be used to avoid vapor lock on take off and as an aux pump
if
>> the mechanical pump on the Rotax fails I would install the pump
after
>> the
>> gascolator and after an in line fuel filter, basically next to the
>> gascolator Are there any problems that anyone can see with such an
>> installation? I am concerned with the greater likelihood of vapor
lock
>> with auto gas
>>
>>
>>
>>
>> George
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
>
>
Message 7
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| Subject: | Do I need a primer system on my |
--> Zenith-List message posted by: Keystone Engineering LLC <keystone@gci.net>
Jay
My advice is go install a system that is suggested by ZAC or has been use on a
certified airplane. The primer system I installed on my O-360 in my 801 was modeled
after the one in a Cherokee Turbo-Arrow. I came off the pressure side
of the fuel block to a solenoid (from Spruce) to all 4 cylinders. I just turn
on the fuel pump then push to open the solenoid for 3-7 seconds depending on
the temp. It normally starts right off.
I have 800+ hrs in a PA-22 that used vented fuel tank caps. They work just fine.
I had more water in the gas from fueling during a rain than from the caps.
I have 230 hrs on my vented caps in my 801 and have not had an issue with the
caps.
I'm really excited about my new bigger tail with VGs on 3" centers. I can shoot
stabilized approaches at 40 MPH indicated which is 45 MPH GPS. Talk about short
landings!
Bill Wilcox
N801BW
Valdez, Alaska
230 hrs
Just finished flying off my 5 hrs on the new tail.
Starting to install full lotus floats.
I am still working on FWF on my 801 with a Lycoming O-360. I do not
have any experience with the Lycoming, so I am looking for input on the
primer system. Do I need it? If I need it, what parts do I need? How
is it plumbed in? The engine I have has the lines installed for the
system to cylinders 1, 2, and 3. It has a fitting on cylinder #4. See
pictures below.
And while we are on the fuel system, I want to know a little more about
the vented fuel caps. The fuel caps I recieved are vented and the
construction manual mentions: " (Note: Vent tube for the wing tank is
required on the bottom of the wing if the fuels caps are not vented).
Therefore I did not put vent tubes in my wings. Now after reading the
list yesterday, I wonder if I made a huge mistake by omitting them? I
looked at Gary Limings website and see that he made a different cap for
his tanks: http://www.liming.org/ch801/fuel.html Do I need to do the
same thing or will my vented caps work ok???
Message 8
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| Subject: | 701 top mount fuel sender |
--> Zenith-List message posted by: ROBERT SCEPPA <rjscep@yahoo.com>
> I just ordered a JC Whitney fuel gauge and sender
> unit for our Glastar project. I will probably use
> two of the units in my 701..Let you all know how
> it works out. Bob S
--- "Hinde, Frank George (Corvallis)"
<frank.hinde@hp.com> wrote:
> --> Zenith-List message posted by: "Hinde, Frank
> George (Corvallis)" <frank.hinde@hp.com>
>
> Check out you local autoparts store, or even some
> good hardware stores
> have the trays of little stuff. Never ceases to
> amaze me what I find in
> these places.
>
> My local Knects has copper washers.
>
> Frank
>
> -----Original Message-----
> From: owner-zenith-list-server@matronics.com
> [mailto:owner-zenith-list-server@matronics.com] On
> Behalf Of Gordon
> Sent: Thursday, February 23, 2006 4:12 AM
> To: zenith-list@matronics.com
> Subject: Zenith-List: 701 top mount fuel sender
>
> --> Zenith-List message posted by: "Gordon"
> <cscsail@gmavt.net>
>
> Tommy,
> I got the washers from a local diesel engine repair
> business. The
> washers are commonly used on fuel connections like
> banjo fittings, but
> I'm sure there are other sources.
> Gordon
>
> Do you know where I could order some of the copper
> washers you
> mentioned?
>
> Thanks,
> Tommy Walker
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> browse
> Subscriptions page,
> FAQ,
> http://www.matronics.com/Navigator?Zenith-List
>
> Admin.
>
>
>
>
>
>
>
>
>
>
>
Message 9
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| Subject: | Re: Aux fuel pump in 701 |
--> Zenith-List message posted by: Bryan Martin <bryanmmartin@comcast.net>
I have two Facet FP40105 pumps in parallel in my Zodiac. I only run one at a
time and have no check valves. I have never had a problem with back flow
through the inoperative pump. These pumps are designed to allow some back
flow in order to allow the line downstream of the pump to depressurize after
shut down. This back flow is just a trickle which makes check valves
unnecessary.
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
on 2/23/06 10:43 AM, Hinde, Frank George (Corvallis) at frank.hinde@hp.com
wrote:
> --> Zenith-List message posted by: "Hinde, Frank George (Corvallis)"
> <frank.hinde@hp.com>
>
> That's a wild looking cowling on that 701...Looks cool!
>
> Not so sure I like the idea of your single pump...Do you know for sure
> that you will get full fuel flow through a dead Facet fuel pump?
>
> Why not simply run two of them in parallel. You can leave them running
> all the time or turn both of them on just for TO and landing. A pair of
> 40105 Facets in parallel will not jack the fuel pressure any higher than
> a single pump and I think there will be enough flow from each pump to
> overcome the backflow thru the dead pump...If not you could always put
> two check valves in or buy the pump with check valves...(model number
> escapes me at present)
>
> Nice plane!
>
> Frank
>
Message 10
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--> Zenith-List message posted by: "neitzel" <n963wb@frontiernet.net>
Greetings
I installed a low pressure facet 40105 in series with the vacuum operated
diaphragm pump on a Rotax 582. The boost pump was operated on take off and
landing only. This set up has just over 100 hours on it and has not
interfered with fuel flow when not in operation. I plan to use the same set
up on my 701 with Jabiru power plant. Someone did bring up a valid point
about first understanding the operation of the mechanical pump on the
engine. I am slated for engine delivery this month so will inspect the pump
and, if necessary, even disassemble it to determine fuel flow and possible
ramifications in the event of a failure.
Dick Neitzel
Sayner, WI
N962WB reserved
Message 11
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| Subject: | Re: Aux fuel pump in 701 |
--> Zenith-List message posted by: Tim & Diane Shankland <tshank@megsinet.net>
I don't think anyone has adequately explained the difference between the
mechanical engine pumps and the electric. The electric pumps typically
have an oscillating plunger that pumps the fuel though a pair of check
valves giving a rated pressure. If it is for example 5 psi then two
electric pumps in series is 10 psi. The engine pump operates
differently when the lever that is driven by an engine cam is moved it
pulls the diaphragm such as to enlarge the pumping chamber. This action
is against a spring. This is the intake stroke for the pump that pulls
fuel into the pump chamber. The fuel is forced out of the chamber by the
spring pressure and not the return of the pump lever which is connected
by a mechanism that does not allow it to pump on the return stroke. In
that way the spring determines the pressure of the pump not the engine
speed. In like manner if the fuel is being fed to the pump under
pressure the mechanical pump is not additive. The is the output pressure
will be which ever is higher the electric pump or the mechanical pump.
This is why for years certified low wing aircraft have had a mechanical
engine pump and a boost pump with no over pressure problem. For my
installation since I only have electric pumps I connected them in serial
with a pressure regulator to keep the pressure at 5 psi.
Tim Shankland
Jim Hoak wrote:
>--> Zenith-List message posted by: "Jim Hoak" <planejim@bellsouth.net>
>
>George,
>
>I have 601Hd fuel system plumbed as you described. I use auto gas
>exclusively. It has worked fine for 9 years (500.3 hours). I use the
>electric pump for T/O and landing (in case of a go around) in case the
>mechanical pump dies at the wrong time. The only question I have is the
>pressure you mentioned. My engine driven (Rotax 912UL) pump and the
>electric pump both put out around 5 Psi NOT 25 to 45 psi as you mentioned.
>My elec. pump is a Facet and I don't use a "check valve" in the system. I
>just checked my purchase records but the receipt doesn't mention the part
>number and the airplane is miles from home. I plumbed the electric pump in
>"parrallel" with the engine pump and it works fine.
>
>Good luck.
>
>Jim Hoak 601HD 500.3 hrs.
>----- Original Message -----
>From: <george.mueller@aurora.org>
>To: <zenith-list@matronics.com>
>Sent: Tuesday, February 21, 2006 12:56 PM
>Subject: Zenith-List: Aux fuel pump in 701
>
>
>
>
>>--> Zenith-List message posted by: george.mueller@aurora.org
>>
>>
>>
>>I am thinking about the fuel system in my 701 and am considering putting
>>in
>>a facet fuel pump as a booster pump The pump I am considering is an
>>FP40105 which doesn't have a check valve and puts out 25 to 45 PSI (my
>>understanding is the Rotax 912 can handle a max pressure of 58psi) This
>>pump would be used to avoid vapor lock on take off and as an aux pump if
>>the mechanical pump on the Rotax fails I would install the pump after the
>>gascolator and after an in line fuel filter, basically next to the
>>gascolator Are there any problems that anyone can see with such an
>>installation? I am concerned with the greater likelihood of vapor lock
>>with auto gas
>>
>>
>>
>>
>>George
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
>
>
>
Message 12
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| Subject: | Aux fuel pump in 701 |
--> Zenith-List message posted by: "Craig Payne" <craig@craigandjean.com>
Another oft-forgotten point is that there are many models of the Facet
pumps. Some have check-valves, some have anti-siphon valves, some have
neither, some have both. There is a fairly wide variation in the range of
lift, GPH and min/max PSI. In all there are 36 different configurations in
the 12 volt models. The link below is to a PDF (Adobe Acrobat) document on
Facet's web site.
http://www.facet-purolator.com/mcl/media/technology/hd_pdfs/Cubed_Solid.pdf
Or as a tiny URL: http://tinyurl.com/nakhq
-- Craig
Message 13
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| Subject: | Aux fuel pump in 701 |
--> Zenith-List message posted by: William Jeffries <vair601@yahoo.com>
Frank,
If the diaphram were to develop a hole it may exit out the weep hole however
it would probably drain into the crankcase as it might still be pumping. Having
a check valve seperating the two pumps, yet a good idea, but not required to
have the system function. After all there is a check valve built into the mechanical
pump to begin with or it couldn't pump. Just my two cents worth.
Bill Jeffries
---------------------------------
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| Subject: | Re: Another website up |
--> Zenith-List message posted by: Gary Gower <ggower_99@yahoo.com>
Yes, I think will be a good idea... :-) :-)
Thanks for the link, And congratulations, for the page.
Saludos
Gary Gower.
Brandon Tucker <btucke73@yahoo.com> wrote:
--> Zenith-List message posted by: Brandon Tucker
I guess I'll include the link:
http://home.sandiego.edu/~btucker-03/
R/
Brandon
---------------------------------
Message 15
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| Subject: | Re: Aux fuel pump in 701. |
--> Zenith-List message posted by: Gary Gower <ggower_99@yahoo.com>
Jim and all...
We have a 701 kit we built,.. It has the fuel system as the plans, the stock
vented gas caps and the stock aluminum gascolator.
The only thing we added were a shut off valve in each hose, from each tank,
inside the lugage area where the flaperon conectors covers are, easy reach by
the pilot if need, they are always opened.
What we note in this first 35 hours of flying the 701, is that the right wing
uses the gasoline first, the left tank is about 3/4 full when the right wing
is near empty (1/4). in flights of more than 2 or 3 an hours (depending of
the real flight time, off course).
We tested in the hangar the flow of each tank independent and also both tanks
at the same time, closing one valve and disconecting the hose just pass the main
shut off valve...
Dont have the numbers now, but the diference was minimal. we havent flew the
plane that much time to see what happens when (if) the right tank gets empty,
I once shut the right tank valve for about 40 minutes over the dry lake (not
chicken, just thinking safe :-) to use the left tank first and then both tanks,
when I landed both tanks where almost level. (used the calibrated level tube)..
Now, given this, a friend that is building another (701) kit here, got a 1
galon header tank from Kitfox, It is installed the same way the KF instructuins,
in the back side of his seat , is plumbed betwen the tanks and the ZAC gascolator,
He also uses the shut off valves from the main tanks as we did.
This particular header tank is vented with a T, and at the same level of the
main tanks, so no overflow is spected... I think this will help keep both tanks
level.
This 701 will ready to fly is a few weeks, is almost finished. So not field
tested yet.
As is impossible now to get the Kitfox header tank (bankrupt), we are planning
to make one similar made of aluminum for our plane...
One extra from this header tank is that has an internal level switch that turns
on a LED in the instrument panel if the level of the HT is about 90% low...
If this happens the pilots has about 1 gallon left (10 minutes) to look
for a good place to glide...
I dont know where we can look for a similar sender switch for our tank, because
will be a good safety gadget. If we can find the switch we will make our tank
2 galons to have 20 minutes to land... if needed. hope never needed.
What do you think?
Saludos
Gary Gower.
Jim Hoak <planejim@bellsouth.net> wrote:
--> Zenith-List message posted by: "Jim Hoak"
George,
I have 601Hd fuel system plumbed as you described. I use auto gas
exclusively. It has worked fine for 9 years (500.3 hours). I use the
electric pump for T/O and landing (in case of a go around) in case the
mechanical pump dies at the wrong time. The only question I have is the
pressure you mentioned. My engine driven (Rotax 912UL) pump and the
electric pump both put out around 5 Psi NOT 25 to 45 psi as you mentioned.
My elec. pump is a Facet and I don't use a "check valve" in the system. I
just checked my purchase records but the receipt doesn't mention the part
number and the airplane is miles from home. I plumbed the electric pump in
"parrallel" with the engine pump and it works fine.
Good luck.
Jim Hoak 601HD 500.3 hrs.
----- Original Message -----
From:
Sent: Tuesday, February 21, 2006 12:56 PM
Subject: Zenith-List: Aux fuel pump in 701
> --> Zenith-List message posted by: george.mueller@aurora.org
>
>
> I am thinking about the fuel system in my 701 and am considering putting
> in
> a facet fuel pump as a booster pump The pump I am considering is an
> FP40105 which doesn't have a check valve and puts out 25 to 45 PSI (my
> understanding is the Rotax 912 can handle a max pressure of 58psi) This
> pump would be used to avoid vapor lock on take off and as an aux pump if
> the mechanical pump on the Rotax fails I would install the pump after the
> gascolator and after an in line fuel filter, basically next to the
> gascolator Are there any problems that anyone can see with such an
> installation? I am concerned with the greater likelihood of vapor lock
> with auto gas
>
> George
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Message 16
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| Subject: | Re: Aux fuel pump |
--> Zenith-List message posted by: Gary Gower <ggower_99@yahoo.com>
I dont know the Jabiru gasoline pump (yet) but the 912 Is a sealed pump... similar
to VW and Audi, no way to open it...
About a not probable failure (broken) of the mechanical pump diaphgram... Could
the gasoline be pumped inside the oil carter by the electric pump? In this
case the engine will blow because of lack of oil?... ("washed" out by gasoline
in a few minutes?)
Just Murphy thinking... Hope not possible.
Saludos
Gary Gower.
neitzel <n963wb@frontiernet.net> wrote:
--> Zenith-List message posted by: "neitzel"
Greetings
I installed a low pressure facet 40105 in series with the vacuum operated
diaphragm pump on a Rotax 582. The boost pump was operated on take off and
landing only. This set up has just over 100 hours on it and has not
interfered with fuel flow when not in operation. I plan to use the same set
up on my 701 with Jabiru power plant. Someone did bring up a valid point
about first understanding the operation of the mechanical pump on the
engine. I am slated for engine delivery this month so will inspect the pump
and, if necessary, even disassemble it to determine fuel flow and possible
ramifications in the event of a failure.
Dick Neitzel
Sayner, WI
N962WB reserved
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