Results 1 to 2 of 2

Thread: Fuel Flow O-360A4K

  1. #1

    Fuel Flow O-360A4K

    I was looking at the Lycoming Operator Manual and the Fuel Flow for
    the 180HP O-360A4 series engines page 3-50. The graph shows a major
    change in slope between 75 & 80% then a return to the orginal slope of
    the line after 80%. 2 GPH between 75 and 80%. Thru the rest of the
    curve the slope is about 1 GPH per 5%HP delta. Can anyone explain why?

    Mike Dawson





    ------------------------ Yahoo! Groups Sponsor --------------------~-->
    Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page
    http://us.click.yahoo.com/dpRU5A/wUI...LSAA/SyTolB/TM
    --------------------------------------------------------------------~->

    Join BAC today and be a part of the ONLY Type Club for the Musketeer series!

    www.beechaeroclub.org


    Yahoo! Groups Links

    <*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/musketeermail/

    <*> To unsubscribe from this group, send an email to:
    musketeermail-unsubscribe@yahoogroups.com

    <*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/

  2. #2

    Fuel Flow O-360A4K

    --- In musketeermail@yahoogroups.com, "dawsonmic23" <dawsonmi@a...>
    wrote:
    >
    > I was looking at the Lycoming Operator Manual and the Fuel Flow for
    > the 180HP O-360A4 series engines page 3-50. The graph shows a
    major
    > change in slope between 75 & 80% then a return to the orginal slope
    of
    > the line after 80%. 2 GPH between 75 and 80%. Thru the rest of
    the
    > curve the slope is about 1 GPH per 5%HP delta. Can anyone explain
    why?
    >
    > Mike Dawson
    >

    That's reflective of the Lycoming operating recommendation that
    engines be leaned at power settings of 75% or less, but left at full
    rich at any power setting above 75%. I don't have the graph you're
    looking at in front of me, but I wouldn't be surprised if it said so
    somewhere in the footnotes to the graph. Some aircraft POH's show a
    complete discontinuity in fuel flow vs % power between 75 and 80%.

    Craig MacCallum
    Sierra N525SB
    Montclair, NJ







    ------------------------ Yahoo! Groups Sponsor --------------------~-->
    Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page
    http://us.click.yahoo.com/dpRU5A/wUI...LSAA/SyTolB/TM
    --------------------------------------------------------------------~->

    Join BAC today and be a part of the ONLY Type Club for the Musketeer series!

    www.beechaeroclub.org


    Yahoo! Groups Links

    <*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/musketeermail/

    <*> To unsubscribe from this group, send an email to:
    musketeermail-unsubscribe@yahoogroups.com

    <*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/

Similar Threads

  1. Low manifold psi. and fuel flow?
    By gaboytm in forum Musketeer-Mail Archive
    Replies: 3
    Last Post: 03-09-2007, 02:48 PM
  2. Fuel Flow O-360 A4K
    By dawsonmi in forum BAC Mail Archive - DO NOT POST HERE
    Replies: 0
    Last Post: 12-12-2005, 08:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO