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Fuel sender and Pitot mount question

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ddddsp1(at)juno.com
Guest

Posted: Sat Feb 04, 2006 10:04 pm Post subject: Fuel sender and Pitot mount question

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
Guest

Posted: Sun Feb 05, 2006 5:46 am Post subject: Fuel sender and Pitot mount question

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

 

 

 

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LarryRosen

Joined: 16 Jan 2006
Posts: 415
Location: Medford, NJ

Posted: Sun Feb 05, 2006 6:23 am Post subject: Fuel sender and Pitot mount question

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 

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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_________________
Larry Rosen
#40356
N205EN (reserved)
<http>

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