YS 140L Question

[Larry N Lisa]

William,

Jim Ivey was on target with his response, Sorry I wasn't clear, Hear is what I was looking for...

What is the best Prop for this set up to get the optimum RPM range? I didn't think that the YS series liked to turn that high of RPM. What is optimum best RPM range for this engine

The second question that Jim provided a response to was the idle, with spitting and not coming back down to the idle RPM causing a very hot landing if not prepared for it...

Thanks,

Larry Diamond
NSRCA 3083
AMA CD 5024
  ----- Original Message ----- 
  From: william krueger 
  To: discussion at nsrca.org 
  Sent: Sunday, May 23, 2004 9:37 PM
  Subject: Re: YS 140L Question


  What exactly is your question?
    ----- Original Message ----- 
    From: Larry N Lisa 
    To: NSRCA 
    Sent: Sunday, May 23, 2004 9:39 PM
    Subject: YS 140L Question


    OK...I've posted questions about problems in the past...Now this may be on the other end of the scale...

    My YS 140L was very strong this weekend. I have changed fuels and I'm using PowerMaster 30%-DZ.

    I know I'm turning too many RPMs so here is what I'm currently running:

    1) Prop 16x11 (Prop Clearance issue for anything bigger than a 16" dia)
    2) Hatori Pipe...Has the tab for mounting built into the pipe. Don't remember the number.
    3) 1/2" Header (Black and Tony Stillman thought it may be the header from Australia).
    4) 1/2" Teflon coupler from McMasters.

    Sorry I don't have the numbers for the pipe and header, but I'm new and don't remember this stuff. I bought the plane used last year.

    Current max RPM is 9,200. I richened it up for 8,900 max. It does seem to spit allot at idle, but hold good pressure in the tank. I have programmed the idle up function on my Airtronics Stylus to drop about 500rpm for landing as it only comes back down to about 2700 - 2900 after running for a couple of minutes. Will idle forever at around 2,000 - 2,200 once it first started or after a couple minutes from a long run...

    Look forward to you responses...
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