Welcome! Becoming a registered user of ShortWingPipers.Org is free and easy! Click the "Register" link found in the upper right hand corner of this screen. It's easy and you can then join the fun posting and learning about Short Wing Pipers!

Likes Likes:  0
Results 1 to 6 of 6

Thread: Best cruise prop for Ly-Con O320

  1. #1

    Join Date
    Nov 2020
    Posts
    2
    Post Thanks / Like

    Default Best cruise prop for Ly-Con O320

    Hello short wingers,
    Charlie (N8973C) will be getting a tricked out Ly-Con O320, which they say should dyno in the 170hp range. We have plenty of takeoff performance as-is, and are on 8.5 tires.

    What is the current best thinking on prop options, and the trade-offs they present?

    Thanks,
    -J

  2. #2
    Gilbert Pierce's Avatar
    Join Date
    Nov 2007
    Location
    Germantown, Tennessee 01TN
    Posts
    3,544
    Post Thanks / Like

    Default Re: Best cruise prop for Ly-Con O320

    Quote Originally Posted by jourdan View Post
    Hello short wingers,
    Charlie (N8973C) will be getting a tricked out Ly-Con O320, which they say should dyno in the 170hp range. We have plenty of takeoff performance as-is, and are on 8.5 tires.

    What is the current best thinking on prop options, and the trade-offs they present?

    Thanks,
    -J
    58” for climb, 61 for cruise. With 170 hp you might go up an inch. My 160 with a 58” climbs 1000 to 1500 FPS depending on load and OAT. Cruise at 75% power true’s out about 118. MPH. 61/62” will undoubtedly cruise faster. People on here will tell you anything between 125 mph up to MACH .80 at 7 Gph.
    Last edited by Gilbert Pierce; 11-16-2020 at 05:52 PM.

  3. #3
    Administrator Steve Pierce's Avatar
    Join Date
    Nov 2007
    Location
    Graham, Texas, United States
    Posts
    13,101
    Post Thanks / Like
    Blog Entries
    1

    Default Re: Best cruise prop for Ly-Con O320

    What airplane? What prop do you have now, McCauley or Sensenich? I would try it and pitch accordingly. Some previous threads on this site to do with prop pitch but with your LyCon engine they might be a bit shy in pitch. https://www.shortwingpipers.org/foru...th-160HP-Pacer

    Google search
    what prop pitch site:shortwingpipers.org
    Last edited by Steve Pierce; 11-17-2020 at 07:29 AM.

  4. #4

    Join Date
    Mar 2016
    Location
    Merritt Island, FL
    Posts
    658
    Post Thanks / Like

    Default Re: Best cruise prop for Ly-Con O320

    I had my 58 inch Sensenich overhauled last year and it flew quite nicely. Lower vibration. Very smooth. I wanted faster cruise speed for cross country flight so ordered a new 60 inch Sensenich. The difference in climb performance is almost imperceptible. In fact I cannot definitively say it made any difference. The difference in cruise speed performance is about 4 miles an hour faster. When I put the wheel pants on it adds another 2 miles an hour.

  5. #5

    Join Date
    Mar 2016
    Location
    Merritt Island, FL
    Posts
    658
    Post Thanks / Like

    Default Re: Best cruise prop for Ly-Con O320

    Quote Originally Posted by Subsonic View Post
    I had my 58 inch Sensenich overhauled last year and it flew quite nicely. Lower vibration. Very smooth. I wanted faster cruise speed for cross country flight so ordered a new 60 inch Sensenich. The difference in climb performance is almost imperceptible. In fact I cannot definitively say it made any difference. The difference in cruise speed performance is about 4 miles an hour faster. When I put the wheel pants on it adds another 2 miles an hour.
    I should have added that I have a '56 PA22-150 (with a nosewheel) and 75% power cruise speed went from 116 with the 74DM-058 to 120 mph with the 74DM-060, (122 mph with wheel pants); and climb rate loaded light is 1050 to 1100 fpm and heavy (near gross) is about 800 to 850 fpm.

  6. #6

    Join Date
    Mar 2017
    Location
    Frederick MD
    Posts
    947
    Post Thanks / Like

    Default Re: Best cruise prop for Ly-Con O320

    There is a wide variation in prop numbers, and all dependent on condition, rig of the airplane, and engine condition. A prop with a recent overhaul will perform better than a similar pitch/diameter prop that has irregularities on the surface. Rigging of the airplane will also impact overall efficiency, flap rigging, aileron rigging and washout, cooling efficiency, fit and finish of fairings, gap seals and on and on. A prop matched to HP output will be better that one with to much pitch as the engine won’t turn up to sufficient hp for reasonable take off and climb.

    Props are expensive, best to find friends with different pitch props and try them before you settle on what you want. As always, with fixed pitch props it is always a compromise. That’s why for my Clipper I have both a climb and a cruise prop. I’ll be able to swap based on my mission as needed.


    Sent from my iPad using Tapatalk

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •