Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 3 of 3

Thread: a 61fx thing


  1. #1

    Join Date
    Sep 2003
    Location
    R, VT
    Posts
    1,480
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    a 61fx thing


    Baxter,, my 61FX is ether on it's 7th or 8th gallon, it runs and starts great with a Slimline Pitts, and the Compression is very good,,, but there are 2 things I got to ask about,,

    A) as I'm tuning the High Needle to find the Peak RPM (at full throttle) there is a good 1/3 of a turn where there is no change in RPM, this happens right at Peak RPM,,
    another way to put this is as I'm leaning the High Needle (at full throttle) as soon as the Engine reaches it's Peak RPM I can turn the High Needle another 1/3 turn more before the RPM's drop from being to lean,, is this normal ??..

    B) I'm finding from week to week, every Saturday I need to lean the Low Needle, I don't think the Low Needle is moving in flight,, could this just be because the Engine is getting more and more time on it, or is there something else that can cause this ??

    if there is anything you need to ask me about this please do..

    thanks !!
    Jim

  2. #2
    Moderator
    Join Date
    Apr 2002
    Location
    Champaign, IL
    Posts
    17,978
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: a 61fx thing

    A) It's normal. Most engines have a "flat spot" near peak.

    B) Weather changes from day-to-day, week-to-week, so the needles will change their settings. Air temperature and humidity will both influence the mixture. Since they change from day-to-day, you'll need to adjust them. Usually, though, the idle mixture doesn't need much adjustment, but to keep it "dead on", you will need to do a touch up from time-to-time.
    Bill Baxter, Manager Hobby Services/Futaba Service/North America
    3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
    Service Phone: 217 398-0007
    Email: hobbyservices@hobbico.com

  3. #3

    Join Date
    Sep 2003
    Location
    R, VT
    Posts
    1,480
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: a 61fx thing

    "Low Needle"

    yes I understand this about the weather, but I just keep having to turning the Low in so I asked, I mean there must be a point where the Low will never need to go leaner,,
    but I will see what happens..

    thank you !!
    Jim


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 05:15 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.