General questions

[Mike Davis]

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From: RebelAir@aol.com
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Date: Sun, 18 Oct 1998 19:10:31 EDT
To: murphy-rebel@dcsol.com
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Subject: General questions
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Hi Folks

I also have a few questions which are probably straight forward but I do
need
some help and/or confirmation that I am working towards the right numbers
etc.

1/ Best angle of climb info. Bob P. kindly replied and said that most
people
just use the 3 point attitude in order to measure 150% maximum fuel flow
requirement. ie. Can your system supply the fuel flow of max power at best
angle of climb at minimum fuel quantities. In the Bingelis books, it shows
an
airplane with the tail in a trench to mimic best angle. Any thoughts?

2/ Material for engine baffles? 5052x 0.031"?

3/ The mixer plate which takes the input from the stick and turns it 90
degrees and inputs the push/pull tubes for the flaperons is not symmetrical.
The instructions make no mention of this and it could be installed 2
different
ways. i.e. The 3 holes that the push/pull tubes attach to are not at 90
degrees which indicates that there is a right and wrong way to install them.
Has anybody notices this? If you lay the mixer plate out on paper you will
see that there is a difference when you trace out the shape and measure the
intersection of the lines you draw thru the push/pull centres.

4/ Several people have modified their flap mechanism as have I. Upon
reading
the excellent material from the EAA, it states that in order to have the
Rebel
pass the inspection, any significant change to the controls must be approved
by the designer. My inspector last year made the inference as well. The
DABI
cannot OK this. Surely we can not expect Mr. Murphy to inspect all the
builders changes. What has been everyone's experience? How did Rick Ford,
Curt and Wayne Oshea etc. get their system passed? Appreciate the help on
this one. If I cannot figure it out, I will simply lock the system in place
and have a flapless Rebel inspected. I did ask the factory this question
last
year and last week. Last year they simply stated that we recommend doing it
per the book and declined to help further which leaves me in the soup. Last
week when I asked the same question, they had no answer at all.

5/ In my firewall forward package, I received qty. 5, 1/8"NPT to 1/8" tube
nipples. I assume these are for the primer injector points. There is no
info
on this and I do not know how this is normally down.

6/ Last question - Control throws - 8" up and down for the elevator. Would
not more up elevator be desired than down for the landing flare? I can't
imagine needing full down elevator in flight. Rudder - 8" left and right?
Flaperon - 3.5" up and 3" down?

7/ Really the last question - On the Murphy tech support web site they
mention the change in the CG recommended location. I am not sure that it
only
makes reference to those aircraft equipped with floats or not. I seems to
recommend that the forward CG limit be reduced. ie. the forward limit is
farther back if you follow me because of a nose heavy tendency. Does this
not
also apply to those aircraft on wheels?

Sorry for all the questions. I probably should have asked them one at a
time.
However I have asked all of these questions of MAM and I am still awaiting a
response.

Thanks very much


Brian



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