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     1. 11:34 AM - Homebrew Injection Systems, Steep Approaches (Michael Fisher)
 
 
 

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Time: 
11:34:18 AM PST US
From: 
Michael Fisher <mfisher@gci.net>
Subject: 
Homebrew Injection Systems, Steep Approaches
      
      
      
      Hi alternate engine aficiondos,
      
      Thanks for recommending some interesting web sites.&nbsp; There is no shortage
      of ideas out there.&nbsp; I will be using a homebrew, constant flow injection
      system with no electronics. The core idea came from the book "Jungle Pilot" by
      Nate Saint. Three power settings will do the job --- takeoff, cruise, and approach.
      A blip-switch on the stick will enable zero thrust operations.&nbsp; A
      light wooden propeller on a high compression engine will quit turning if the pilot
      slows it too much.&nbsp; Mustn't let that happen.
      
      A little open cockpit parasol monoplane (Pietenpol) peels off into a steep slip
      to clear the tall spruce trees guarding a river gravel bar where the king salmon
      run.&nbsp; Brppp, brppp, brppp sounds are trumpeting from the short Allison
      style stacks.&nbsp; How cool is that?&nbsp; Not much vertical surface aft of
      the aerodynamic center, large control surfaces, ignition interrupt to zero thrust
      -- the Piet can descend fast enough to get in plenty of trouble...don't let
      it bite you.
      
      Happy landings,
      
      Mike Fisher
      Talkeetna, Alaska
      
      Subject: Re: Pietenpol-List: Steep Approaches, Homebrew Injection
      Got any more details on that injection system? Sounds intriguing.
      
      Hi alternate engine aficionados,
      The injection system is only a concept at this point. Throttle body injection
      or carburetor results in wet manifold.&nbsp; Intake port, multi-point injection
      keeps
      the manifold dry. --- Huge difference in Cyl. to Cyl. charge balance and icing
      resistance -- greatly favors dry manifold.&nbsp; There is no need for sequential
      port injection at power settings much above an idle.&nbsp;&nbsp; Many have adapted
      a carburetor
      to engines designed for injection.&nbsp; This works better on systems that
      were originally throttle body.&nbsp;&nbsp; I will be working on the 1.9L inverted
      Ford
      constant-flow, multi-point system whenever I get the dry sump oiling system operational.
      
      Mike Fisher
      
      








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