Barnhart wrote:

Had two tech counselors from EAA out looking at my wings and the subject

of fuel management came up.  My application is a high wing.  20 b  rotary.

Consensus was that front and rear pick ups should be 1/2 inch.  Return

line to right wing is low in tank and centered with a 3/8  hose.

Venting is to be done independently from the see thru site gauge for fuel

levels.  Site gauges will have a ball that floats on the top of fuel  so it
can be seen when using auto fuel, or rough air.   Can't use the same top
fitting for venting and top of site gauge.  Both tanks will vent off 3/8
min. hose and tee into a pipe facing forward at least 3/8.  Try to keep both
lengths of hose the same to keep the same amount of pressure to both tanks.
(Will probably not burn evenly tho) Caps are non venting. This is not an IFR
aircraft.  (Will have the Barny triple redundant nav system.  Hand held gps,
sectional, and a set of binoculars...)

Fuel burn is determined by which tank lever is open for fuel to be

burned.  Too many hours in old beech musketeers....  Return tank is 40
gallons.  Will keep in mind which tank to use for take off and landings
depending on fuel temp (ambient and from return)  and quantity.

One lever to control each large tank for fuel management.  Alot easier

than multiple tanks and transfer switches. Something I'm used  to flying with.

Use the right type of proseal.

Barny

Barney, bite the economic bullet and buy that Andair EFI valve and return
fuel to the tank you are draining it from. Some day your mind will be

distracted.

Paul Lamar

  Run an independent vent line for each tank.   It took Cessna 30 years to
give up on
this single vent idea.   Does work, but not very well.  Big imbalances in
fuel load.

Bill
EAA Tech Counselor
Long EZ builder & pilot
BSME, MSME

And, one mud dauber wasp can stop up both tanks.

Charlie

 
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