Hey Nick: No, the trim tab should stop even with the elevator. The later
models with the larger trim tab have a different amount of travel (10 degrees
up and 36 down). You did not mention about the CG of your plane. This is
important also. If your plane is not loaded within the CG ranges, it will
not fly according to the specs. And in fact could be a dangerous problem.
Besides, more trim tab up means more elevator down and thus more nose
down moment. If your tab is moving properly, it may not be going far enough
down. That is why I mentioned about checking how far it moves. If it does
not go to 60 degrees down, and fly's OK (70 or less with full nose up trim)
you may need to adjust how much it goes down. (change the amount the wire
moves the tab in the down position)
Lynn
In a message dated 7/24/2009 8:24:47 P.M. Eastern Daylight Time,
[email protected] writes:
My cable is alright and I just lubed it. I did notice that the stop for
the trim tab does'nt seem te allow for any up trim . With the trim in the
full up position the tab is level with the elevator. Should'nt there be some
travel up. If so ,how much and how do I adjust it . Could the stop be the
wrong one.
--- On Fri, 7/24/09, [email protected] <[email protected]> wrote:
From: [email protected] <[email protected]>
Subject: Re: [ercoupe-tech] Second Flight
To: [email protected], [email protected]
Date: Friday, July 24, 2009, 10:23 PM
Hey Nick: The first thing to do is to make sure that the trim tab is
moving through its full amount of travel.
Push the trim control handle to the full forward position and check that
the tab is level with the elevator. Then pull the trim control handle to the
full aft position and check that the tab is now down about 60 degrees down
(more than 45). If the tab movements comply approximately with those
numbers, double check your weight and balance to make certain that the empty
CG
is within the 25.2 to 25.8 inches prescribed in the TCDS. If those are both
in sink, look at the trailing edge of the elevator. If it is bent down,
this adds additional down trim and may need to be changed. You will need to
fly the airplane again. With the trim control full aft, you should be able
to glide at approximately 70 MPH ( a little less is just fine)
I am assuming you will find that most likely the trim tab is not
operating through its full range. This is generally caused by corrosion in the
trim wire housing inside the horizontal stabilizer. I have found this on
most of the Ercoupes I have worked on. Some I was able to loosen it up by
spraying a good dose of liquid wrench, followed by lots of WD-40 or other
similar penetrating lubricant, on as much of the wire housing I could access
by
removing the tail cone. Others required removal of the housing and
replacement (I would usually replace the trim wire and housing if I had to go
to
these efforts). You may also be able to lubricate the wire by loosening its
attachment at both ends and pulling it out about 3 feet. Then applying
light grease to the wire before pushing it back into place and re fastening it.
Lynn Nelsen
in a message dated 7/24/2009 3:43:49 P.M. Eastern Daylight Time,
[email protected] writes:
Wow ! What a glorious morning and wonderful flight.72 degrees light
overcast , clear as a bell.This was the first time I got to fly the coupe
since I
flew her home on a wing and a prayer . Been working on her for 4
months.ASI is about 30 mph high but that will get changed. My Garmin 196 was
right
on. The little coupe flew majestically.I tell people she is the
Metropolitan of the skys.Us old guys remember that little car. I love flying
with an
open cockpit.
I do have one major concern .!! With the trim all the way in ( tab up
against stop ) cruise speed , level flight , I can let go of the yoke and she
DIVES like a STUKKA. What tha..........That aint right!!!!!!!! What can
it be ???? How do I fix it?
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