REFLECTOR: Primer Works

[Douglas Holub]

22 mpg at 198 mph; I love these airplanes!

Doug Holub
  ----- Original Message ----- 
  From: Laurence Coen 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Monday, September 25, 2006 10:41 AM
  Subject: Re: REFLECTOR: Primer Works


  Hiroo,

  Glad to hear that your starting problem is solved.  As to your reported numbers the IAS isn't very meaningful without the pressure altitude and OAT to correct to TAS.  Your RPM and MAP numbers would indicate a very high power setting near 90%.  At that power setting your fuel flow would closer to 14 GPH than 7 GPH.  Your CHT numbers are consistent with a high power setting.  My numbers at 8000 feet density altitude, 2600 RPM, 20 inhg, 8.9 GPH, TAS 172 Knts, OAT 12C.  Hottest CHT #1 291F, coolest #5 216F.  My climb power setting is 2600 RPM/25 MAP with a fuel flow around 14 GPH.

  Larry Coen
  N136LC SE/RG Franklin/IVO
    ----- Original Message ----- 
    From: Hiroo Umeno 
    To: Velocity Aircraft Owners and Builders list 
    Sent: Sunday, September 24, 2006 11:04 PM
    Subject: REFLECTOR: Primer Works


    Today, I finished the installation of the primer.

    Essentially, it is as suggested in this forum.  I used an elbow, tapped with 1/4-20 thread, brass screw with frange trimmed with 1/32" hole drilled throuugh its shank as the nozzle.  Hard line to the front of the induction pipe (beyond the high-temp areas around the exhaust), then flexible hose to the manifold on the firewall, which T's the feeder from the solenoid.  My current start procedure goes like this.

    Master - ON
    Mags - Both
    Mixture - Full Rich
    Boost - ON (Shows fuel flow.  Wait until flow settles down to 0)
    Throttol - Open 1/4"
    Primer - ON (2 - 4 sec as needed.  Flow will show 1.2GPH or so)
    Clear Prop!
    Crank.

    Using this procedure, the engine started within 5 seconds or so of cranking.  It at first started firing intermittent before settling into a nice regular run.

    Thanks, all for the suggestions on the primer.

    On yesterday's flight, I took the plane up to 147Kts indicated straight and level, 4500ft, 2710rpm, 24.3MAP, fuel flow showing 7.0GPH.  Oil at 197degF, Hottest cylinder #6 running 344, coolest #2 running 308.

    Do these seem reasonable?  The plane does not have wheel pants, surfaces are rough, wing-bolt holes uncoversd, cowl gaps not sealed, etc.  It is in a pretty dirty configuration right now.



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