The Murphy Builders Site

Hi Bob

I just wanted to rephrase my comment. Your Rebels did not look like they
needed to go flying, they looked just fine. I think they wanted to go
flying. No insult intended. Sorry about that.

Brian

-----Original Message-----
From: Bob Patterson [mailto:bob.patterson@canrem.com]
Sent: Saturday, April 29, 2000 2:36 PM
To: Murphy Rebel Builders List
Subject: Re: amphib hydraulic gear pump



Ken,
No problem lowering the handle - when you hit full down (or up),
just switch the gear position valve to the middle & it releases pressure.
Only saw one Rebel with 'pull up' handle - this strikes me as REALLY
awkward ! It is much easier to push down. The force required is not
great - not as much as required to pull Cessna flaps down (for those
who remember the mechanical flaps), or Super Cub flaps. About 16 strokes
are needed, and must be slow, to allow fluid time to enter. (** NOTE
that Murphy use Automatic Transmission Fluid rather than brake fluid -
it does the same job, but doesn't destroy paint if spilled/leaked.**)
My reservoir is on the firewall, passenger side - just a quart can
with mods for sight guage and fittings.

Another thought is to have an extensible handle - mine has an
inner and outer tube. The outer tube is free to slide forward, increasing
the leverage, then slide back to get it more out of the way. This could
be improved with pins in slots to allow twist-locking in either position.
A carved oak (or similar) grip would be nice too ...

I would be more inclined to try to run the hoses above the floor,
down the center, on either side of the pulleys. They will be easier to get
at for service, and to remove for changeover to wheels/skis in winter.
They will hide nicely under lightweight carpet ... Ask me to open
up FOKM before the next meeting, so you can check it out (not that it
might be a shining example, but good for some ideas :-) )

....bobp

------------------------------orig.---------------------------------------
At 10:20 AM 4/29/00 -0400, you wrote:

Hi

Does the "push down on the handle for pressure" pump installation create a
problem for stowing the pump handle when the gear reaches the full down or

full

up position? Or can the handle be forced down into the stowed position? My

pump

handle will be forward of the seat backs so having it stuck in the up

position

would not be acceptable.

The pump exploded diagram acutually shows the handle reversed to a "pull up

on

the handle for pressure" situation. In that case the handle could always

easily

be returned to the full down stowed position. Ergonomically this might be

more

awkward to pull up on the handle if the pump requires a lot of force

though. How

much effort (force) does the handle actually require?

I am trying to plan for an underfloor hydraulic line to the reservoir. And

for

the pump handle to not conflict with the placement of the forward elevator

cable

pulley.

thanks
Ken

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Archives located at:
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*---------------------------------------------------------------------------
--------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*---------------------------------------------------------------------------
--------*

*--------------------------------------------------------------------------

The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*--------------------------------------------------------------------------

Sorry about that, Wayne !! It was a long winter, and life is
short, and opportunity should be seized ...... ;-)

Speaking of seizing opportunity - why don't you take a little
summer holiday .... out to the "WET COAST" with us on the Ramble ??!!!
Time is flying away..... :-) :-) :-)
Maybe your son would like to see the rest of Canada !

.....bobp