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Fuel sender and Pitot mount question

 
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ddddsp1(at)juno.com
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PostPosted: Sat Feb 04, 2006 10:04 pm    Post subject: Fuel sender and Pitot mount question Reply with quote

Looking for suggestions on inspecting the fuel senders to verify they are moving freely all the way up and down in the tank.  I have quickbuild wings and did not have the luxury of installing them before finishing the fuel tank.  I believe they are hitting the stiffener and not going up between the fuel vent line and stiffener............thus not going UP completely.  This would show a tank less than FULL.  Any ideas? 
I also have a Dynon pitot mount bracket/pitot.  It is angled to go under the lip of the wing spar with 3 rivots. I am also running angle aluminum 90 degrees to the front lip along the bottom skin spar...........is it recommended to use a doubler plate like the GRETZ model also?  Appears to be very sturdy without a doubler plate.  If any one has pics of their Dynon bracket mounted I would enjoy seeing them.
Thanks,
DEAN

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Tim_Lewis(at)msm.umr.edu
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PostPosted: Sun Feb 05, 2006 5:46 am    Post subject: Fuel sender and Pitot mount question Reply with quote

I ran a piece of string through a couple of holes (in the access plate,
as I recall) allowing me to pull the sender up and down (using the
string). I had the same problem with limited movement.

I suggested to Vans that the fuel sender be included with the QB wing,
and that the sender arm be bent when the tank is being built.
Otherwise, as you noted, it's difficult (I gave up) to get it adjusted
so it moves freely without binding on stiffeners somewhere.

Tim
--
Tim Lewis -- HEF (Manassas, VA)
RV-6A N47TD -- 830 hrs
RV-10 #40059 under construction

ddddsp1(at)juno.com wrote:
Quote:
Looking for suggestions on inspecting the fuel senders to verify they
are moving freely all the way up and down in the tank. I have
quickbuild wings and did not have the luxury of installing them before
finishing the fuel tank. I believe they are hitting the stiffener and
not going up between the fuel vent line and stiffener............thus
not going UP completely. This would show a tank less than FULL. Any
ideas?

I also have a Dynon pitot mount bracket/pitot. It is angled to go under
the lip of the wing spar with 3 rivots. I am also running angle aluminum
90 degrees to the front lip along the bottom skin spar............is it
recommended to use a doubler plate like the GRETZ model also? Appears
to be very sturdy without a doubler plate. If any one has pics of their
Dynon bracket mounted I would enjoy seeing them.

Thanks,

DEAN



________________________________________________________________________
Try Juno Platinum for Free! Then, only $9.95/month!
Unlimited Internet Access with 1GB of Email Storage.
Visit http://www.juno.com/value to sign up today!


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LarryRosen



Joined: 16 Jan 2006
Posts: 414
Location: Medford, NJ

PostPosted: Sun Feb 05, 2006 6:23 am    Post subject: Fuel sender and Pitot mount question Reply with quote

This is how I installed the fuel sender into my quickbuild wings
I bend the rod per the plans.
I attached safety wire to the rod
The safety wire was fished through the bottom drain opening (VA-112)
I connected a multimeter to the fuel sender and measured the resistance
through the range of the fuel sender using the safety wire to move the
float up and down.
I would shine a flash light through the finger strainer (VA-141) on the
inboard side of the wing and try to look through the drain opening with
the safety wire to see where the float was hitting.
Then remove the fuel sender, tweak / rebend the rod, re-install and
check the range of motion with the multimeter.
Do this over and over again until you get the full range from the float Sad
Real pain in the a$$.
In the end I got resistance reading
Right tank: empty 247 ohms, full 29 ohms
Left tank: empty 246 ohms, full 33 ohms.

There is a picture of the safety wire through the drain opening on my
website. Now I need to add the commentary to have it make sense. The
photo is here
<http://lrosen.nerv10.com/Construct/Log/Wings/FuelLevel/index.html>

Larry Rosen
http://lrosen.nerv10.com

Tim Lewis wrote:

Quote:


I ran a piece of string through a couple of holes (in the access
plate, as I recall) allowing me to pull the sender up and down (using
the string). I had the same problem with limited movement.

I suggested to Vans that the fuel sender be included with the QB wing,
and that the sender arm be bent when the tank is being built.
Otherwise, as you noted, it's difficult (I gave up) to get it adjusted
so it moves freely without binding on stiffeners somewhere.

Tim


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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

_________________
Larry Rosen
#40356
N205EN (reserved)
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