Kitfox Aircraft Stick and Rudder Stein Air Grove Aircraft TCW Technologies Dynon Avionics AeroLED MGL Avionics Leading Edge Airfoils Desser EarthX Batteries Garmin G3X Touch
Results 1 to 10 of 10

Thread: Exhaust weight savings

  1. #1

    Join Date
    Apr 2013
    Location
    Hillsboro, NH
    Posts
    95

    Default Exhaust weight savings

    My 2 into 1 HKS exhaust with tractor muffler was getting rusty. I substituted 2 piccolo tubes - same rate of climb, no noticeable change in noise, much easier maintenance, and 9 lb less weight. It makes the exhaust come out as a series of tiny barks instead of a few big ones. Holes face to the sides and aft, have a total area larger than the cross sectional area of the pipe. Finisned it with old fashioned black wood/coal stove polish.
    Larry
    Attached Images Attached Images

  2. #2
    Senior Member Dusty's Avatar
    Join Date
    Dec 2012
    Location
    Christchurch, New Zealand
    Posts
    378

    Default Re: Exhaust weight savings

    Keep an eye on this,I would be wary of a failure near the flange!

  3. #3
    Senior Member SkySteve's Avatar
    Join Date
    Jun 2008
    Location
    Huntsville, UT
    Posts
    1,054

    Default Re: Exhaust weight savings

    My 912 model I has dual exhaust. I installed 2 Volkswagen mufflers for weight savings. In the photo they look like exhaust pipes, but they are actually two Volkswagen mufflers siting side by side.
    Steve Wilson
    Huntsville, UT
    Kitfox 85DD
    912A / 3 Blade Taper Tip Warp Drive
    Convertible Nosewheel & Tailwheel
    SkySteve's SPOT Page
    SkySteve's You Tube Videos

  4. #4
    Senior Member jrevens's Avatar
    Join Date
    Aug 2009
    Location
    Arvada, CO
    Posts
    2,146

    Default Re: Exhaust weight savings

    Quote Originally Posted by SkySteve View Post
    My 912 model I has dual exhaust. I installed 2 Volkswagen mufflers for weight savings. In the photo they look like exhaust pipes, but they are actually two Volkswagen mufflers siting side by side.
    How did you pipe those Steve... a simple 2 into 1 on each side? Can you make any kind of comparison noise-level wise to the Rotax muffler?

    By the way, that's a beautiful picture!
    John Evens
    Arvada, CO
    Kitfox SS7 N27JE
    EAA Lifetime
    Chap. 43 honorary Lifetime

  5. #5

    Join Date
    Apr 2013
    Location
    Hillsboro, NH
    Posts
    95

    Default Re: Exhaust weight savings

    Quote Originally Posted by Dusty View Post
    Keep an eye on this,I would be wary of a failure near the flange!
    Yes, I'll keep an eye on that, may add a brace. I have seen similar systems that worked fine. Thanks for the thought.

  6. #6

    Join Date
    Apr 2013
    Location
    Hillsboro, NH
    Posts
    95

    Default Re: Exhaust weight savings

    Quote Originally Posted by SkySteve View Post
    My 912 model I has dual exhaust. I installed 2 Volkswagen mufflers for weight savings. In the photo they look like exhaust pipes, but they are actually two Volkswagen mufflers siting side by side.
    The old aircooled VW exhaust tips?
    Attached Images Attached Images

  7. #7
    Senior Member SkySteve's Avatar
    Join Date
    Jun 2008
    Location
    Huntsville, UT
    Posts
    1,054

    Default Re: Exhaust weight savings

    Quote Originally Posted by jrevens View Post
    How did you pipe those Steve... a simple 2 into 1 on each side? Can you make any kind of comparison noise-level wise to the Rotax muffler?

    By the way, that's a beautiful picture!
    John,
    Dan Denny did a left side 2 to 1 and a right side 2 to 1 before I got the plane. They are held in place with the old half a link of chain welded on with a spring holding them. I've never had a Rotax muffler but have tried several other mufflers (all too heavy in my opinion). I would consider my plane fairly loud.
    Steve Wilson
    Huntsville, UT
    Kitfox 85DD
    912A / 3 Blade Taper Tip Warp Drive
    Convertible Nosewheel & Tailwheel
    SkySteve's SPOT Page
    SkySteve's You Tube Videos

  8. #8
    Senior Member SkySteve's Avatar
    Join Date
    Jun 2008
    Location
    Huntsville, UT
    Posts
    1,054

    Default Re: Exhaust weight savings

    Quote Originally Posted by Micro Mong Bldr View Post
    The old aircooled VW exhaust tips?
    Micro,
    The ones I have aren't chrome, but I really like that look. Maybe, just maybe, I'll check with the local muffler guy and see if I can get some. I would then look "cool" and perhaps throw a set of baby moons on the wheels!!!
    (By the way, I already have a round gear shift ball on my flap handle, and a hula girl on the dash, but no dice)
    Steve Wilson
    Huntsville, UT
    Kitfox 85DD
    912A / 3 Blade Taper Tip Warp Drive
    Convertible Nosewheel & Tailwheel
    SkySteve's SPOT Page
    SkySteve's You Tube Videos

  9. #9
    Super Moderator Av8r3400's Avatar
    Join Date
    Jan 2009
    Location
    Merrill, WI
    Posts
    3,044

    Default Re: Exhaust weight savings

    Be careful, SkySteve, this could lead to a horrible, horrible redneck-ey end…











    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
    YouTube Videos

  10. #10
    Senior Member SkySteve's Avatar
    Join Date
    Jun 2008
    Location
    Huntsville, UT
    Posts
    1,054

    Default Re: Exhaust weight savings

    Dude, that muffler is a cherry!!
    Steve Wilson
    Huntsville, UT
    Kitfox 85DD
    912A / 3 Blade Taper Tip Warp Drive
    Convertible Nosewheel & Tailwheel
    SkySteve's SPOT Page
    SkySteve's You Tube Videos

Posting Permissions

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