Subject: Ed's engine problem.
From: Paul
Date: 3/23/2000, 3:46 PM


 >
Good work Ed. Hope to see you and your airplane at Sun & Fun.

Ground adjustable test club Ed. That way we can use it on a homemade dyno
test stand. I have been threatening to go down to Tracy's and make one
of those for two years now. Tracy is so busy perhaps someone from Florida
that can weld can meet me there and we can build one without disturbing
Tracy. I am way rusty on welding since the last time I welded was in
1971 or so. While we are at it we can make the stand nod so we can test
props  and PSRU shafts.

Oh and BTW the adjustable pitch prop we are working on could serve for
that
test club purpose. No need to stop the engine and adjust the pitch for
another HP/RPM  data point measurement.

Paul Lamar


Ed Anderson wrote:

Hey, I like that idea, when can you deliver the CS??

As soon as we are able to shoot Bill without getting shot back :-)

I don't know. Several people are involved in the project. John Moran
is machining the mechanical parts. Bill Freeman is designing the blades.
joa will machine the mold for the blades and last but not least
Perry Mick will lay-up the blades. Some people have also contributed money
for material for the blades. This is truly an ACRE NL cooperative project.
I thank you all. We will keep the prototype for testing and for anyone
that would like to test with it. PL

    Just got back from the airport where I conducted high speed taxi test
with no indication of surge.  But, am running a bit rich with new settings
below 5000 rpm.  Also, I decided to do a data collection thru the HALTECH
unit while running the engine and discovered that there were no data on

Throttle position, it read Zero.  Discovered that the electrical plug to the
TPS had apparently backed out of its socket but was still physically
connected (not electrically appaently).  I don't really know if the
disconnection of the TPS could have occurred as I got airborne and caused
the surging or not.  I spectulate that if the HALTECH unit was getting zero
throttle opening indication that its possible that could have resulted in
the surging lean condition.  Does anyone have any idea what the sudden
disconnect of the TPS would do.

   I don't know enought about EFI CPUs to know what weight in the
computation it gives a TPS, but if its significant, I might have found the
problem.  Anyone know or want to hazard a guess??

Usually people like Haltech keep the source code for the program a big secret.
They might however answer specific questions like that. PL


   Paul, I am more than willing to meet you at Tracy's and help.  I have
built a test stand in the past.  Unfortunately, I am no welder and mine was
bolted together out of angle iron.

Ed

This is a project for later this year. Perhaps in the Fall when things cool
off down there :-) Thanks for the offer. I will take a look at bolting one
together. Perhaps we can come up with a shippable kit dyno design. I have a friend
with an iron worker that can punch holes in angle real quick.
 
Paul Lamar
 
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