 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
randy(at)shadycreekoutlaw
Guest
|
 Posted: Sun Jul 02, 2006 11:05 am Post subject: Fuel Sender...again... |
 |
|
Over the past 2 days I've been scratch building my wing tanks... I plan on doing a top installation of the fuel senders. Not really knowing the exact location of where to cut the hole for the sender in the top of my tank I did the following:
1. I put the tank on my level table and using a wooden block under one end of the tank, simulating the dihedral of the wing.
2. Next I put a level flat on the table beside the tank simulated the fuel level. I wanted my sender positioned in such a way that when the float hit the bottom of the tank, I would still have approx. 3 gallons of fuel in the tank. (Inboard bottom corner of the tank.)
3. Sliding the level back and forth along the table you can manipulate the point where the fuel level and tank bottom meet. After doing some calculations I came up with a placement of my sender where approx. 3 gallons would be left in the tank when the float hit the bottom of the tank.
I guess my real question here is: Do you guys see anything wrong with the way I'm doing this? Am I overlooking an important item in all of this?
The measurement I came up with is that the sender would be 420mm from the inboard tank end, measure towards outboard. I have posted an illustration of what I'm trying to describe here: http://www.n344rb.com/images/FuelSenderAnim.gif
Thanks in advance,
Randy
XL Wings - Plans Only
http://www.n344rb.com
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 |
|
|
|
| Back to top |
|
 |
larry(at)macsmachine.com
Guest
|
| Posted: Sun Jul 02, 2006 12:49 pm Post subject: Fuel Sender...again... |
|
|
Randy,
I'd put the float in a position that puts the least amount of fuel at
the bottom of the fuel gage reading. It's being able to see the float
jiggle to a low fuel setting
that offers an idea of how far it is to empty. It would be my
preference to know that to within the last gallon. Where it is when
it's full or above half is of little consequence
compared to the gage that will read nearest empty. Otherwise you'd be
guessing when it hit bottom or if it hit bottom with 3 gallons in play
due to the movement of the
plane. My gages read to less than half a gallon and it's easy to tell
when they've stopped moving.
Larry McFarland - 601HDS at www.macsmachine.com
Randy Bryant wrote:
| Quote: | Over the past 2 days I've been scratch building my wing tanks... I
plan on doing a top installation of the fuel senders. Not really
knowing the exact location of where to cut the hole for the sender in
the top of my tank I did the following:
1. I put the tank on my level table and using a wooden block under
one end of the tank, simulating the dihedral of the wing.
2. Next I put a level flat on the table beside the tank simulated the
fuel level. I wanted my sender positioned in such a way that when the
float hit the bottom of the tank, I would still have approx. 3 gallons
of fuel in the tank. (Inboard bottom corner of the tank.)
3. Sliding the level back and forth along the table you can
manipulate the point where the fuel level and tank bottom meet. After
doing some calculations I came up with a placement of my sender where
approx. 3 gallons would be left in the tank when the float hit the
bottom of the tank.
I guess my real question here is: Do you guys see anything wrong with
the way I'm doing this? Am I overlooking an important item in all of
this?
The measurement I came up with is that the sender would be 420mm from
the inboard tank end, measure towards outboard. I have posted an
illustration of what I'm trying to describe here:
http://www.n344rb.com/images/FuelSenderAnim.gif
Thanks in advance,
Randy
XL Wings - Plans Only
http://www.n344rb.com
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 |
|
|
|
| Back to top |
|
|
randy(at)shadycreekoutlaw
Guest
|
| Posted: Sun Jul 02, 2006 2:52 pm Post subject: Fuel Sender...again... |
|
|
Thanks Larry,
In short, I guess what you're saying is for me not to have a "built in"
reserve with my guage...???
Just make it read what's really there.. If it's full, it's full, if it's
empty, it's empty...right?
Thanks!
Randy
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 |
|
|
|
| Back to top |
|
|
bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
|
| Posted: Sun Jul 02, 2006 5:06 pm Post subject: Fuel Sender...again... |
|
|
Unfortunately, because of the dihedral, you can't position the
senders so that they are accurate at both ends of the scale. If you
set them up to read accurately when the tanks are full, you'll still
have a few gallons left when they read empty and if you position them
to read accurately at the bottom end of the scale, you'll burn off a
few gallons before they move off the full mark.
I would say that the guage should read empty when the tank is empty.
That way, you won't be tempted to try to stretch your flight a little
further thinking that you still have that three gallons left in the
tank. When the guage reads empty, it's time to land, now, because you
really don't know how much fuel is left after the gauges bottom out.
It's much more critical to know when the tanks are going empty. I
don't care about the first few gallons I burn, it's the last few
gallons I worry about.
On Jul 2, 2006, at 6:49 PM, Randy Bryant wrote:
[quote]
<randy(at)shadycreekoutlaws.com>
Thanks Larry,
In short, I guess what you're saying is for me not to have a "built
in" reserve with my guage...???
Just make it read what's really there.. If it's full, it's full, if
it's empty, it's empty...right?
Thanks!
Randy
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 |
|
|
randy(at)shadycreekoutlaw
Guest
|
| Posted: Sun Jul 02, 2006 5:59 pm Post subject: Fuel Sender...again... |
|
|
Thanks Bryan,
That makes 2 of you that have said the same thing... I'm convinced... As
you say though, you can make it either read accurate at full or at empty,
but not much you can do in the between... I'll go the route you and Larry
have recommended.
Thanks!
Randy
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 |
|
|
|
| Back to top |
|
|
ggower_99(at)yahoo.com
Guest
|
| Posted: Mon Jul 03, 2006 10:23 pm Post subject: Fuel Sender...again... |
|
|
Hope you are able to adjust it correctly, BUT
If the range of the sender cannot be possible to set complete, and you need to make a choise. I will advise to have the accurate reading in the empty side mark.
Is better to know when the tank is empty, or how close is to empty, when you are flying headwind.
Doesnt matter that the gauge marks full from, lets say 3/4 to full, for example...
Just what I will do...
Saludos
Gary Gower
Flying from Chapala, Mexico.
Randy Bryant <randy(at)shadycreekoutlaws.com> wrote:[quote] --> Zenith-List message posted by: "Randy Bryant"
Thanks Larry,
In short, I guess what you're saying is for me not to have a "built in"
reserve with my guage...???
Just make it read what's really there.. If it's full, it's full, if it's
empty, it's empty...right?
Thanks!
Randy
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 |
|
|
|
| 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
