 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Ken
Joined: 06 Jun 2008
Posts: 15
|
 Posted: Fri Jun 20, 2008 9:46 am Post subject: Fuel delivery |
 |
|
I'm considering putting an electric fuel pump in each wing of my XL. In each case a check valve would follow before going to the gascolator which would be in the engine compartment. An electric toggle switch would control which pump was on while the check valves would keep each tank from filling the other. The downside to this is that the gascolator would be under a couple of pounds of pressure and would also be subject to engine compartment temperatures. Am I ignoring any other pitfalls or are either of the above concerns a "deal breaker"?
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
| Back to top |
|
 |
Gig Giacona
Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA
|
| Posted: Fri Jun 20, 2008 10:12 am Post subject: Re: Fuel delivery |
|
|
You might consider a fuel selector as per the plans (that does away with the separate check valves and reduces the switchology error possible with two separate valves) and the gasolator in the floor on the cabin side of the firewall reduces the heat issue.
I do understand the desire to have the pumps in the wings close to the tanks but there is a not insignificant down side to that. You have fuel, under pressure, in the cockpit.
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR |
|
| Back to top |
|
|
carlossa52(at)gmail.com
Guest
|
| Posted: Fri Jun 20, 2008 11:38 am Post subject: Fuel delivery |
|
|
Ken, it seems the pumps near the tanks are a common approach.
A downside is that you may end up with a failed pump connected to a full tank, and a good pump connected to an empty tank.
Cheers
Carlos
CH601-HD, plans
assembling left wing
2008/6/20 Ken <hror1(at)pld.com (hror1(at)pld.com)>:
[quote] --> Zenith-List message posted by: "Ken" <hror1(at)pld.com (hror1(at)pld.com)>
I'm considering putting an electric fuel pump in each wing of my XL. In each case a check valve would follow before going to the gascolator which would be in the engine compartment. An electric toggle switch would control which pump was on while the check valves would keep each tank from filling the other. The downside to this is that the gascolator would be under a couple of pounds of pressure and would also be subject to engine compartment temperatures. Am I ignoring any other pitfalls or are either of the above concerns a "deal breaker"?
[b]
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
| Back to top |
|
|
amyvega2005(at)earthlink.
Guest
|
| Posted: Fri Jun 20, 2008 3:05 pm Post subject: Fuel delivery |
|
|
if you have an engine driven fuel pump what you are trying to design as an absolute waste of design time and money. the pump is there to prime the system and as a back up in event of engiuen driven fuel pump goes out. Keep it simple. then in an emergency you are trying to chase the problem. In an emergency you will be preoccupied flkying the plane firsdt, then thinking"OK switch pumps... no not that one ... oh shit which ones off/on etc.." KEEP IT SIMPLE.. KEEP TO THE PLANS.
Juan
--
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
| Back to top |
|
|
bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
|
| Posted: Fri Jun 20, 2008 3:58 pm Post subject: Fuel delivery |
|
|
I have my gascolator in the cabin floor just ahead of the spar at the
low point of the system and two Facet pumps in parallel just ahead of
the gascolator (one is a backup), I don't have an engine driven pump.
No need for check valves and the gascolator is not pressurized, just
the couple of feet of hose between the pumps and firewall. I have
never had a problem with fuel delivery to the engine even with auto
gas on very hot days. I also never have to guess which tank to switch
to if I run a tank dry. The bottom of the tanks are several inches
higher than the pump inlets so there is always gravity feed to them.
It's usually best to keep the fuel system as simple as possible as
long as it will reliably deliver fuel to the engine.
On Jun 20, 2008, at 1:46 PM, Ken wrote:
| Quote: |
I'm considering putting an electric fuel pump in each wing of my
XL. In each case a check valve would follow before going to the
gascolator which would be in the engine compartment. An electric
toggle switch would control which pump was on while the check valves
would keep each tank from filling the other. The downside to this
is that the gascolator would be under a couple of pounds of pressure
and would also be subject to engine compartment temperatures. Am I
ignoring any other pitfalls or are either of the above concerns a
"deal breaker"?
|
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive. |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
