plumbing for Perry Pump setup

[richard.lewis]

Randy,

Yes, D&T the backplate to supply power to the pump.  If using an OS160,
there is a neat fitting available from OS that replaces one of the backplate
screws and provides a pressure tap.  It requires drilling into the bottom of
one of the backplate screw holes, but is a really slick installation.

I use a three line setup.  One line with a clunk that goes to the pump.
Second line with no clunk pointed into the bottom rear of the tank for
fueling.  Third line for the vent/overflow.   You cannot fuel/de-fuel
through the pump, and if you put a T behind the pump, you will force fuel
through the pump while fueling.  So, the three line makes the most sense so
that you don't have to disconnect a fuel line for fueling.

The vent/overflow simply gets routed to the exterior of the plane.  The VP30
does not use a pressurized tank.

Richard
  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of randy10926 at comcast.net
  Sent: Monday, December 27, 2004 8:23 AM
  To: nvrc club list; discussion at nsrca.org @nsrca.
  Subject: plumbing for Perry Pump setup


  As my excelleron is ready for test flying,  I am making preparations for
re-engining the Focus 2.  I am trying to thinking through the setup and
plumbing for the use of a peryy pump, specifically the V30.

  First need to tap the backplate for crank pressure, then ?

  Would a two line system work?  What about the overflow?

  Would a three line be better?  How would you set it up?

  Randy
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