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Michael Wynn
Joined: 10 Jan 2006
Posts: 148
Location: San Ramon, CA
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 Posted: Sun Oct 29, 2006 7:02 am Post subject: Float sender question |
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Hi David,
I did this a few months ago. I made one interesting mistake. The plans give one spec to where the bends go on the float arm. An insert with the floats gives a different one. I used the plans before I noticed the other, so I have a slightly reduced range of motion. Most people have said that you want to use a fuel totalizer and not depend entirely on the guages, so I am not buying new float sender arms.
The archives here and at VAF have a wealth of other suggestions on sealing and set up.
Regards,
Michael Wynn
RV-8, Wings
San Ramon, California
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Michael Wynn
RV 8
San Ramon, CA |
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Hopperdhh(at)aol.com
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| Posted: Sun Oct 29, 2006 7:44 am Post subject: Float sender question |
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David,
I just bent the arms about like the plans showed as I remember. I adjusted the bends until the floats just touched the bottom and top of the tanks at their extreme limits of travel. Later I came across the sheet that was included with the senders, I guess. I didn't check to see if I had done it right because the tanks were already closed up.
I must have done it about right. In separate flight tests (!) I ran each tank dry. I had 3 to 5 minutes of fuel remaining after the gauge hit the empty pin. Close enough!
Dan Hopper
RV-7A
In a message dated 10/29/2006 3:23:35 AM Eastern Standard Time, claypride(at)hotmail.com writes:
| Quote: | --> RV-List message posted by: David Karlsberg <claypride(at)hotmail.com>
Okay... I am setting up my fuel tank floats. Is the float supposed to hit
the bottom or top of the tank? My guess is no, looking at the plans. I
just wanted to be sure.
Thanks,
David
Ps if there are any hints or things I snbsp; - NEW MATRONICS LIST WIKI -<========================
nbsp; ======================== |
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n616tb(at)btsapps.com
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| Posted: Sun Oct 29, 2006 7:45 am Post subject: Float sender question |
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After completing my plane and filling my tanks a little at a time to see how the gauges read, I would consider hooking a gauge up while setting up the senders. I am not happy with the way they read, but I do have the fuel computer system to back me up. If you are going to use standard fuel gauges, consider hooking them up while you can adjust your senders.
Tim
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of MLWynn(at)aol.com
Sent: Sunday, October 29, 2006 7:01 AM
To: rv-list(at)matronics.com
Subject: Re: Float sender question
Hi David,
I did this a few months ago. I made one interesting mistake. The plans give one spec to where the bends go on the float arm. An insert with the floats gives a different one. I used the plans before I noticed the other, so I have a slightly reduced range of motion. Most people have said that you want to use a fuel totalizer and not depend entirely on the guages, so I am not buying new float sender arms.
The archives here and at VAF have a wealth of other suggestions on sealing and set up.
Regards,
Michael Wynn
RV-8, Wings
San Ramon, California
| Quote: | | http://www.matronics.com/Navigator?RV-List |
01234567890123
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pgroell
Joined: 24 Jun 2006
Posts: 4
Location: France
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| Posted: Mon Oct 30, 2006 8:17 am Post subject: Float sender question |
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Hello,
I'm just doing my tanks. On the sheet I got from Vans, it says MAXIMUM
CLEARANCE from top and bottom 1/8. I guess zero is less than maximum
allowed, that how I did it. If anybody is reading this another way, let
me know. I'm still a few proseal sessions away from closing everything.
Pascal GROELL
RV-7A #72588
www.notreavion.net
David Karlsberg a écrit :
| Quote: |
Okay... I am setting up my fuel tank floats. Is the float supposed to hit
the bottom or top of the tank? My guess is no, looking at the plans. I
just wanted to be sure.
Thanks,
David
Ps if there are any hints or things I should know about this stuff bring it
on.
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http://www.matronics.com/Navigator?RV-List |
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Hopperdhh(at)aol.com
Guest
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| Posted: Mon Oct 30, 2006 9:39 am Post subject: Float sender question |
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David and Pascal,
I think the idea is that they don't want the sender to rub a hole in the skin of the tank. Not a problem if you are in the habit of keeping some gas in the tanks! I guess it could rub on the top skin when the tank is full, though. Hmmmm. I haven't heard of anyone having this trouble. If you haven't done your Mandatory Service Bulletin yet, let us know if the sender has been rubbing on the top of the tank. Now I'm curious.
Dan Hopper
RV-7A
In a message dated 10/30/2006 11:19:39 AM Eastern Standard Time, pgroell(at)chello.fr writes:
| Quote: | --> RV-List message posted by: Pascal GROELL <pgroell(at)chello.fr>
Hello,
I'm just doing my tanks. On the sheet I got from Vans, it says MAXIMUM
CLEARANCE from top and bottom 1/8. I guess zero is less than maximum
allowed, that how I did it. If anybody is reading this another way, let
me know. I'm still a few proseal sessions away from closing everything.
Pascal GROELL
RV-7A #72588
www.notreavion.net
David Karlsberg a écrit :
| Quote: | --> RV-List message posted by: David Karlsberg <claypride(at)hotmail.com>
Okay... I am setting up my fuel tank floats. Is the float supposed to hit
the bottom or top of the tank? My guess is no, looking at the plans. I
just wanted to be sure.
Thanks,
David
Ps if there are any hints or things I should know about this stuff bring it
on.
nbsp; ======================== |
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[quote][b]
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bicyclop(at)pacbell.net
Guest
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| Posted: Mon Oct 30, 2006 9:48 am Post subject: Float sender question |
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I would think that a little clearance would be good. You wouldn't want
to wear a hole through the tank skin. I don't know if that's possible,
but I'd rather not find out the hard way. Our gauges (Van's) are very
inaccurate at high fuel levels but pretty close at the bottom where it
counts.
As someone else mentioned, a fuel totalizer is a great addition to the
panel. I'll never own an airplane with out one. Ours has helped a lot.
By comparing GPS time to waypoint with time remaining on the totalizer,
a planed fuel stop can be validated and a decision made to continue or
stop early. When a diversion for weather is necessary, you can
accurately determine which alternate airport you can reach with adequate
reserves. On one occasion in the Florida panhandle, it made the
difference between outrunning a line of thunderstorms or waiting till
the next day. If we'd stopped for gas too soon, the time spent on the
ground would've kept us from turning the corner before the storms got
there. On another occasion, a long run under an overcast cost more fuel
burn than I'd planned for at altitude and lean mixture. It became
apparent that the planned fuel stop couldn't be reached with reserve and
we landed at a different airport with 40 minutes remaining and no
guesswork involved. The old stopwatch and estimated fuel flow trick
doesn't account for different throttle and mixture settings. With the
totalizer, you can pull power back and watch the time remaining reading
increase.
Pax,
Ed Holyoke
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