 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
ngautier(at)earthlink.net
Guest
|
 Posted: Thu Jul 19, 2007 5:19 pm Post subject: Level tab for RV-10 tanks |
 |
|
Gentlemen,
I'm into the gooey part of tank assembly and before I button the tanks up I'd like to
add a tab inside the tank, visible trough the filler hole, that will let linemen partially
fill the tanks to a known fuel level; just like lot of other aircraft.
I did a little geometry and figured out that the volume of one tank is 31.25 gal.
I doubt that you can fill that full though. I took a wag at the unusable volume and got
about 2.25 gal in each tank. I took a further wag (well a swag this time) and figured,
assuming 3.5 degrees of dihedral, that 19 usable gallons would come up to 1.4 inches
above the bottom of the outboard tank rib. So, my idea is to rivet a little aluminum
angle horizontally on the inside of the outboard rib, 1.4 inches from the bottom, so
it can be seen through the filler hole. (A couple of extra holes to make sure don't
leak but there are lots of other holes that have to not leak too.)
My question for the group is: has anyone actually measured how high any particular
quantity of fuel near 19 or 20 gallons comes up on the outer tank rib? Also, is my
estimate of unusable fuel anywhere close? (I didn't take the dihedral into account.)
What's the actual dihedral angle? I couldn't find the value anywhere. And finally
does anyone have other ideas or experience with how to do this?
One last thing. I'm also putting some capacitive fuel sensor plates in the tanks
modeled after Van's RV-6 capacitive sensors. I got tired of waiting for Van to do
this. If anyone is interested I'll be glad to share the design. Of course I won't
know how well it works for a while...
I'm going to put
do not archive
on this message for now. If we collect some useful information we can archive it
later.
Nick Gautier
40363
Tanks (as you figured)
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
 |
Tim Olson
Joined: 25 Jan 2007
Posts: 2882
|
| Posted: Thu Jul 19, 2007 5:37 pm Post subject: Level tab for RV-10 tanks |
|
|
Small comment....your WAG on the unusable volume is waaaay off. The
unusable volume is about 1/3 qt per tank. I've tested it. This is
in level flight, however, so I would not expect it to go all the way
to any safe landing if you have to turn with less than your 2 gallons
or maybe more.
I can't answer the question on the tabs....I just always fill it full.
Tim Olson - RV-10 N104CD - Flying
do not archive
ngautier(at)earthlink.net wrote:
| Quote: |
Gentlemen,
I'm into the gooey part of tank assembly and before I button the tanks up I'd like to
add a tab inside the tank, visible trough the filler hole, that will let linemen partially
fill the tanks to a known fuel level; just like lot of other aircraft.
I did a little geometry and figured out that the volume of one tank is 31.25 gal.
I doubt that you can fill that full though. I took a wag at the unusable volume and got
about 2.25 gal in each tank. I took a further wag (well a swag this time) and figured,
assuming 3.5 degrees of dihedral, that 19 usable gallons would come up to 1.4 inches
above the bottom of the outboard tank rib. So, my idea is to rivet a little aluminum
angle horizontally on the inside of the outboard rib, 1.4 inches from the bottom, so
it can be seen through the filler hole. (A couple of extra holes to make sure don't
leak but there are lots of other holes that have to not leak too.)
My question for the group is: has anyone actually measured how high any particular
quantity of fuel near 19 or 20 gallons comes up on the outer tank rib? Also, is my
estimate of unusable fuel anywhere close? (I didn't take the dihedral into account.)
What's the actual dihedral angle? I couldn't find the value anywhere. And finally
does anyone have other ideas or experience with how to do this?
One last thing. I'm also putting some capacitive fuel sensor plates in the tanks
modeled after Van's RV-6 capacitive sensors. I got tired of waiting for Van to do
this. If anyone is interested I'll be glad to share the design. Of course I won't
know how well it works for a while...
I'm going to put
do not archive
on this message for now. If we collect some useful information we can archive it
later.
Nick Gautier
40363
Tanks (as you figured)
|
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
GenGrumpy(at)aol.com
Guest
|
| Posted: Thu Jul 19, 2007 5:57 pm Post subject: Level tab for RV-10 tanks |
|
|
I get even more conservative than Tim.
I fill to the top and then tell the EIS that there is only 57 gallons total.
So hopefully if I'm dumb enough to get down that low, there are 3 gal still there!!
Remember to make yourself a dip stick calibrated for your tanks (a wood paint stirrer works great). Calibrate it the first time you fill up a tank.
grumpy
N184JM flying
DO NOT ARCHIVE
In a message dated 7/19/2007 8:39:15 PM Central Standard Time, Tim(at)MyRV10.com writes:
| Quote: | --> RV10-List message posted by: Tim Olson <Tim(at)MyRV10.com>
Small comment....your WAG on the unusable volume is waaaay off. The
unusable volume is about 1/3 qt per tank. I've tested it. This is
in level flight, however, so I would not expect it to go all the way
to any safe landing if you have to turn with less than your 2 gallons
or maybe more.
I can't answer the question on the tabs....I just always fill it full.
Tim Olson - RV-10 N104CD - Flying
do not archive
ngautier(at)earthlink.net wrote:
| Quote: | --> RV10-List message posted by: ngautier(at)earthlink.net
Gentlemen,
I'm into the gooey part of tank assembly and before I button the tanks up I'd like to
add a tab inside the tank, visible trough the filler hole, that will let linemen partially
fill the tanks to a known fuel level; just like lot of other aircraft.
I did a little geometry and figured out that the volume of one tank is 31.25 gal.
I doubt that you can fill that full though. I took a wag at the unusable volume and got
about 2.25 gal in each tank. I took a further wag (well a swag this time) and figured,
assuming 3.5 degrees of dihedral, that 19 usable gallons would come up to 1.4 inches
above the bottom of the outboard tank rib. So, my idea is to rivet a little aluminum
angle horizontally on the inside of the outboard rib, 1.4 inches from the bottom, so
it can be seen through the filler hole. (A couple of extra holes to make sure don't
leak but there are lots of other holes that have to not leak too.)
My question for the group is: has anyone actually measured how high any particular
quantity of fuel near 19 or 20 gallons comes up on the outer tank rib? Also, is my
estimate of unusable fuel anywhere close? (I didn't take the dihedral into account.)
What's the actual dihedral angle? I couldn't find the value anywhere. And finally
does anyone have other ideas or experience with how to do this?
One last thing. I'm also putting some capacitive fuel sensor plates in the tanks
modeled after Van's RV-6 capacitive sensors. I got tired of waiting for Van to do
this. If anyone is interested I'll be glad to share the design. Of course I won't
know how well it works for a while...
I'm going to put
do not archive
on this message for now. If we collect some useful information we can archive it
later.
Nick Gautier
40363
Tanks (as you figured)
|
|
Get a sneak peek of the all-new AOL.com.
[quote][b]
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
dlm46007(at)cox.net
Guest
|
| Posted: Thu Jul 19, 2007 6:55 pm Post subject: Level tab for RV-10 tanks |
|
|
A Plexiglas tube can be calibrated as you fill the tank for the first time and marked at appropriate intervals. I have a four gallon increment stick for the Glastar mains and a 2 gallon increment stick for the Glastar tips. Simply insert the tube cover the top and pull out quickly. Actual amount is easily determined.
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of GenGrumpy(at)aol.com
Sent: Thursday, July 19, 2007 6:57 PM
To: rv10-list(at)matronics.com
Subject: Re: Level tab for RV-10 tanks
I get even more conservative than Tim.
I fill to the top and then tell the EIS that there is only 57 gallons total.
So hopefully if I'm dumb enough to get down that low, there are 3 gal still there!!
Remember to make yourself a dip stick calibrated for your tanks (a wood paint stirrer works great). Calibrate it the first time you fill up a tank.
grumpy
N184JM flying
DO NOT ARCHIVE
In a message dated 7/19/2007 8:39:15 PM Central Standard Time, Tim(at)MyRV10.com writes:
| Quote: |
--> RV10-List message posted by: Tim Olson <Tim(at)MyRV10.com>
Small comment....your WAG on the unusable volume is waaaay off. The
unusable volume is about 1/3 qt per tank. I've tested it. This is
in level flight, however, so I would not expect it to go all the way
to any safe landing if you have to turn with less than your 2 gallons
or maybe more.
I can't answer the question on the tabs....I just always fill it full.
Tim Olson - RV-10 N104CD - Flying
do not archive
ngautier(at)earthlink.net wrote:
> --> RV10-List message posted by: ngautier(at)earthlink.net
>
> Gentlemen,
>
> I'm into the gooey part of tank assembly and before I button the tanks up I'd like to
> add a tab inside the tank, visible trough the filler hole, that will let linemen partially
> fill the tanks to a known fuel level; just like lot of other aircraft.
>
> I did a little geometry and figured out that the volume of one tank is 31.25 gal.
> I doubt that you can fill that full though. I took a wag at the unusable volume and got
> about 2.25 gal in each tank. I took a further wag (well a swag this time) and figured,
> assuming 3.5 degrees of dihedral, that 19 usable gallons would come up to 1.4 inches
> above the bottom of the outboard tank rib. So, my idea is to rivet a little aluminum
> angle horizontally on the inside of the outboard rib, 1.4 inches from the bottom, so
> it can be seen through the filler hole. (A couple of extra holes to make sure don't
> leak but there are lots of other holes that have to not leak too.)
>
> My question for the group is: has anyone actually measured how high any particular
> quantity of fuel near 19 or 20 gallons comes up on the outer tank rib? Also, is my
> estimate of unusable fuel anywhere close? (I didn't take the dihedral into account.)
> What's the actual dihedral angle? I couldn't find the value anywhere. And finally
> does anyone have other ideas or experience with how to do this?
>
> One last thing. I'm also putting some capacitive fuel sensor plates in the tanks
> modeled after Van's RV-6 capacitive sensors. I got tired of waiting for Van to do
> this. If anyone is interested I'll be glad to share the design. Of course I won't
> know how well it works for a while...
>
> I'm going to put
> do not archive
> on this message for now. If we collect some useful information we can archive it
> later.
>
> Nick Gautier
> 40363
> Tanks (as you figured)
> |
Get a sneak peek of the all-new AOL.com.
| Quote: | | http://www.matronics.com/Navigator?RV10-List |
01234
[quote][b]
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
scottmschmidt(at)yahoo.co
Guest
|
| Posted: Fri Jul 20, 2007 9:52 am Post subject: Level tab for RV-10 tanks |
|
|
You are right that 31.25 is about 1.1 gallons too much. When I completely empty my tanks and put exactly 30 gallons in the tank it comes up just a little less than 1" from the bottom of the fuel cap housing. If I fill to the fill cap it is about .1-.2 gallons more. Sorry I can't help more than that. I have never measured a half full tank.
The GRT fuel flow meter works amazingly well once calibrated to tell you how much total fuel you have, then the floats do an OK job of giving you the bigger picture of fuel in each tank, and as a last resort I have the fuel guardians that light up on my panel if the tank drops below 5 gallons. So if I run out of fuel it is because I was stupid and could have done something about it. (I better not run out of fuel now on final at Oshkosh after that comment)
Leaving tomorrow morning for Oshkosh, we will see you all there.
Any recommendations for a halfway fuel stop that is cool and or cheap fuel between SLC and OSH?
Scott Schmidt
Cell 801-718-1277
scottmschmidt(at)yahoo.com
---
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
Tim Olson
Joined: 25 Jan 2007
Posts: 2882
|
| Posted: Fri Jul 20, 2007 10:31 am Post subject: Level tab for RV-10 tanks |
|
|
Scott,
I don't know about a halfway point, but, a good place to get
fuel on the way is KLUM just East of the Minneapolis area.
It's my home field, and fuel is still $3.75/gal right now.
There's a pisser in the brown terminal building, and my hangar
is on field. It's almost exactly an hour from OSH straight-line,
so it gives you time to take a leak, and have only a short
flight over, so you can arrive full on fuel. If you end up
stopping there, and give me a head's up on ETA, I'd meet you
and greet you. Otherwise, see ya at the HQ!
Tim
Scott Schmidt wrote:
[quote] You are right that 31.25 is about 1.1 gallons too much. When I
completely empty my tanks and put exactly 30 gallons in the tank it
comes up just a little less than 1" from the bottom of the fuel cap
housing. If I fill to the fill cap it is about .1-.2 gallons more.
Sorry I can't help more than that. I have never measured a half full
tank.
The GRT fuel flow meter works amazingly well once calibrated to tell you
how much total fuel you have, then the floats do an OK job of giving you
the bigger picture of fuel in each tank, and as a last resort I have the
fuel guardians that light up on my panel if the tank drops below
5 gallons. So if I run out of fuel it is because I was stupid and could
have done something about it. (I better not run out of fuel now on
final at Oshkosh after that comment)
Leaving tomorrow morning for Oshkosh, we will see you all there.
Any recommendations for a halfway fuel stop that is cool and or cheap
fuel between SLC and OSH?
Scott Schmidt
Cell 801-718-1277
scottmschmidt(at)yahoo.com
---
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
ngautier(at)earthlink.net
Guest
|
| Posted: Fri Jul 20, 2007 10:34 am Post subject: Level tab for RV-10 tanks |
|
|
Thanks for the replies. The advice on making a dip tube first thing is
good. Can one of you guys who followed this advice tell me how far above
bottom of the tank, below the filler opening, 20 gallons comes (or some
other calibration you have)?
Tim, yes, I understand that sitting on the ground you can burn almost
all of the fuel in the tanks. I was trying to guess how much gas would
be needed to be safe while maneuvering.
Nick Gautier
40363
tanks
*********
"David McNeill" <dlm46007(at)cox.net> wrote:
Subject: RE: Level tab for RV-10 tanks
A Plexiglas tube can be calibrated as you fill the tank for the first time
and marked at appropriate intervals. I have a four gallon increment stick
for the Glastar mains and a 2 gallon increment stick for the Glastar tips.
Simply insert the tube cover the top and pull out quickly. Actual amount is
easily determined.
_____
From: owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of GenGrumpy(at)aol.com
Sent: Thursday, July 19, 2007 6:57 PM
Subject: Re: Level tab for RV-10 tanks
I get even more conservative than Tim.
I fill to the top and then tell the EIS that there is only 57 gallons total.
So hopefully if I'm dumb enough to get down that low, there are 3 gal still
there!!
Remember to make yourself a dip stick calibrated for your tanks (a wood
paint stirrer works great). Calibrate it the first time you fill up a tank.
grumpy
N184JM flying
DO NOT ARCHIVE
In a message dated 7/19/2007 8:39:15 PM Central Standard Time,
Tim(at)MyRV10.com writes:
Small comment....your WAG on the unusable volume is waaaay off. The
unusable volume is about 1/3 qt per tank. I've tested it. This is
in level flight, however, so I would not expect it to go all the way
to any safe landing if you have to turn with less than your 2 gallons
or maybe more.
I can't answer the question on the tabs....I just always fill it full.
Tim Olson - RV-10 N104CD - Flying
do not archive
ngautier(at)earthlink.net wrote:
| Quote: |
Gentlemen,
I'm into the gooey part of tank assembly and before I
button the tanks up I'd like to add a tab inside the tank,
visible trough the filler hole, that will let linemen partially
fill the tanks to a known fuel level; just like lot of other
aircraft.
I did a little geometry and figured out that the volume of
one tank is 31.25 gal. I doubt that you can fill that full though.
I took a wag at the unusable volume and got about 2.25 gal in each
tank. I took a further wag (well a swag this time)and figured,
assuming 3.5 degrees of dihedral, that 19 usable gallons would
come up to 1.4 inches above the bottom of the outboard tank rib.
So, my idea is to rivet a little aluminum angle horizontally on
the inside of the outboard rib, 1.4 inches from the bottom, so
it can be seen through the filler hole. (A couple of extra holes
to make sure don't leak but there are lots of other holes that
have to not leak too.)
My question for the group is: has anyone actually measured
how high any particular quantity of fuel near 19 or 20 gallons
comes up on the outer tank rib? Also, is my estimate of unusable
fuel anywhere close? (I didn't take the dihedral into account.)
What's the actual dihedral angle? I couldn't find the value anywhere.
And finally does anyone have other ideas or experience with how
to do this?
One last thing. I'm also putting some capacitive fuel sensor
plates in the tanks modeled after Van's RV-6 capacitive sensors.
I got tired of waiting for Van to do this. If anyone is interested
I'll be glad to share the design. Of course I won't know how well
it works for a while...
I'm going to put
do not archive
on this message for now. If we collect some useful information
we can archive it later.
Nick Gautier
40363
Tanks (as you figured)
|
| | - The Matronics RV10-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?RV10-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
