Subject: Long EZ Canopy Update and Cooling Question
From: Rotary Engine
Date: 3/24/2010, 10:44 PM
To: AAA Put this in the To box


 Hey guys just an update.... The canopy is coming together, at least the
front canopy...
 Still working on the Rear.  I was thinking the other day about cooling,
has anyone ever
 tried using the fuel tank as a heat sink for an Oil/Fuel cooler?  Wonder
how that would
 trade at the airplane level for drag count.

 Mike C.

 Cool Mike.
 Looks like the wings are over there on the left.
 With a P-port that will be one speedy airplane.

 What happens when you get low on fuel?

 Paul Lamar


 I have no firsthand experience, but using the fuel tank as a heat sink
doesn't sound too promising on the face of it.
  -- Plumbing complexity:  You're either going to have fuel lines in water
or water lines in your fuel tank, and either one can spell trouble.
  -- Heating the fuel in a full tank can cause loss overboard when the
tanks are full.
  -- The heat eventually has to go somewhere.  Maybe not a big problem with
metal fuel tanks exposed to the outside air, probably a bigger concern with
foam tanks.
  -- How will higher temp/less dense fuel affect engine
efficiency/volumetric efficiency?
 -- As Paul questioned--what happens when you have to do a go-around with
just a few gallons aboard?
 -- Increased potential for vapor lock from warmer fuel?

I'm pretty sure the downside outweighs the upside of this idea.

Mark W.


Fuel Vapor - - -  can you afford the fuel as a coolant plus consider the
danger.

Bruce


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