Yamma-Fox

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Posts posted by Yamma-Fox

  1. Posted · Edited by Yamma-Fox

    Hey guys,

    Just reaching out to anyone who has an interest in Yamaha Aircraft Engines.

    A few of us have decided to start a new Facebook Group: “Yamaha Aircraft Conversions"

    We start this new group to offer a venue for ALL ides and experiences with regard to Yamaha aero power options.

    People there are working on projects from the 80 HP 2cyl 4 stroke phazer motor up to the 280HP versions of turbo apex and sidewinder motors.

    Please join us at:

     

    https://m.facebook.com/groups/164864990778457

  3. Posted

    And it never ceases to amaze me how much money so many people have to spend on toys and and houses and stuff!

    Where do they GET that kind of money? !

     

     

    Oh yeah.....  financing...

    Guess that's what I'm doing wrong.. old school "cash on the barrel" guy. 

    Zero debt..  zero show off house and toys LOL!

     

    1 person likes this

  6. Posted

    Along with c5engineer, I think that some others here (akflyer and jared payne are two that come to mind) are onto some good options that are in the works.

    Sam, run a few searches here for "bush gear" and "what was i smoking" to get some ideas of what guys are trying.

  7. Posted · Edited by Yamma-Fox

    Congratulations on the airplane completion and first flight! 

    Lotta guys here with knowledge on the plane and motor... they'll help you get her performing well.

    Gonna need the egt set up correctly (for tuning and monitoring temp limit). And that sounds like a fairly big prop for a 582, so the pitch change was a step in the right direction.  But if your static rpm was higher than in flight it sounds like the motor needs some dialing in for sure.

    Were you flying it at 1100lbs?  Sounds kinda heavy for first flights.

     

  8. Posted

    Hot engine start trouble is a classic low compression symptom.  Ive seen it on a few 2 strokes.

    I hope that is not the problem, but it's easy to rule out by doing a hot engine compression check.  Most all compression guages are suspect IMO, so use the same guage on a different hot engine that is a known good runner and compare values.

  9. Posted

    You'll blow right by me man!

    Looking forward to it!  I'll be putting your ideas in my build thread and take all the credit LOL!

    :lmao:

  12. Posted · Edited by Yamma-Fox

    Copro's airbox (and most everything fwf) is fabricated by Steve Henry of Wild West Aircraft.  He sells the airbox and expansion tank for yamaha.  Also engine mount and headers specifically to fit highlander / superstol.

    For me I used .75x.058 tube (some .049)for my mount (approx 16ft, no lengths greater that 2ft).  The side rails are 1.5"

    As far as the airbox, I plan to try the Yam snowmo box.  If I have tuning trouble I'll scrap that plan and buy Steves.

  13. Posted · Edited by Yamma-Fox

    Yep, and hopefully not the case, but as ya'll know, that is a typical low compression symptom as well.

    Another rare one that I have had is a vacuum leak.  In my case a rip in the carb boot to motor.

  17. Posted · Edited by Yamma-Fox

    If you held the flywheel from turning with your hand, there is no feasible way you could twist the crank!

    Sit Issac Newton would have to agree: The force of the wrench being coutered equally and oppositely by the flywheel itself... no other force being applied (oppositely) anywhere down the crank.

    That you countered the force with human hand power makes this not even worth discussing (even if you happen to be the reigning champion world's strongest man :) ).  But even if you put a huge torque down on the bolt and held back ONLY on the flywheel by mechanical means you could never hurt anything but the bolt, threads, or flywheel.  Thats why snowmo clutches are removed by holding back via the clutch when you load the puller. Torque ranges on those go up to 110 ft-lbs to tighten and alot more when "popping" the clutch off.

    I have used the rope method, but one could argue that SOME force is being applied through the crank (and to the piston dome) in doing that.   Not enough IMO to ever hurt anything though.

    Sounds lile a twitchy buyer that might be trying to corner you into a "steal of a deal".

  18. Posted · Edited by Yamma-Fox

    This appears to be the towbar that you attach a hitch receiver onto and tow the plane behind a vehicle using the aircraft's wheels as "trailer wheels"

    Credit and thanks to a TeamKitFox member (and a pic from Jim C) for posting over there:

    Towbar_(Large).thumb.jpg.c19ba94b889eaa8f0bbacc5dfb09f9d4.jpg

    kitfox tow hitch - 2.jpg

    avid_tow_bar_1.thumb.jpg.1609911454b744be66952e477750c602.jpg

    1 person likes this

  23. Posted · Edited by Yamma-Fox

    Make sure you keep track of the shims and their location as you pull apart.  

    I posted the c box service manual over in files:

  24. Posted · Edited by Yamma-Fox

    Damn funny!

    But after 17 yrs in that line of work,  and observing the "hot shot" types I've worked with, I'll have to second TJay's version as the even funnier reality!

    1 person likes this

  25. Posted

    Build it!   From your posts Mark it is clear that you have the background to get it right!

    I was intimidated by the idea of building a mount for my yamaha, but with some help, am glad I tackled it.  Learned alot, had fun doing it, and found it wasn't so bad to take on.

    It is just so hard to shop out a one off custom job without bringing the plane and engine to the fabricator.

    1 person likes this