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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: Engine tuning, part 1
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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Date: Sun, 10 Aug 2003 09:29:44 -0400
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"Ed Anderson" <eanderson@carolina.rr.com> wrote:

>>>The 
resistance that I thought indicated the hoses were on the barbed manifold 
pressure fittings were actually the hoses stuck under/between components on 
the board.<<<

As most of you know, I work the AOA booth at the airshows, selling 
Angle-of-Attack instruments.  We had an RV customer who couldn't calibrate his 
instrument and would occasionally get error messages, claimed he'd done all 
the tests of the pressure lines and thought that the brain box must be bad. 
 We finally caught up with him at Sun'n'Fun and went out to the flight line to 
look at the installation ourselves.   When we tested the hose installations we 
found that there was no air going through the hose to the port on the botton 
of the wing.  (One of the tests is to disconnect the wing hoses from the 
computer, blow through them and have someone out at the wing verify that air 
is coming out of the ports... he claimed to have done the test, but apparently 
he didn't.)  The fittings were installed inside the airleron belcrank bay and 
you couldn't see the lower one without a mirror... turns out he couldn't get 
his hand in there so he had his girlfriend install that particular hose.  When 
we looked at it with a dental mirror we found that she had missed the hose 
barb completely.  The installation kit for metal-winged aircraft includes two 
small plastic fittings that attach to the inside of the wing skins with 4-40 
screws... she had hooked the hose to one of the attachment screws sticking up 
about 1/2" from the barb.

So don't feel bad, Ed, you're not the only person to have ever hooked up a 
hose in the wrong place.   It would be nice if there was a simple test that 
could be performed on the EC2 to insure that the hoses are connected 
correctly... if Tracy's new engine instrument takes its data from the EC2 it 
would be possible to see an increase in MAP if you blew lightly into the 
engine end of the hose, verifying that it's hooked up correctly.  Just a 
thought.

         <Marv>