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  1. ghoffman

    PAU Owners Thread

    First pass at PAU baffles
  2. ghoffman

    PAU Owners Thread

    First pass at PAU baffles.
  3. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    I am printing up the ignition mount now
  4. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    Do you use DA 100 headers and pipes?
  5. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    What are the dimensions of that ignition box? I would be happy to print a mount for it.
  6. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    Is this the same engine as pictured with the CNC crankcase etc?
  7. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    What does the ignition look like?
  8. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    DA told me specifically not to use AVGAS. What I buy is basically auto gas without the alcohol. Some small planes like Ultralights and Light Sport Aircraft do not use AVGAS, since they are essentially snow machine engines.
  9. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    I use that when I cannot get the 93 octane, no alcohol, no lead "mogas" at the small FBO nearby. It works great, with the oil of your choice but is expensive. I called the VP guys, and they said the oil they mix in the 50:1, 2 cycle version is Motul. Some say that the Stihl HP Ultra is Motul...
  10. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    Another thing about rotary valve engines is that there are no restrictions for the intake charge to enter when the valve is open. Reeds only open so far and can be fairly restrictive. I'd love to see the inside of this!
  11. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    Nope. Tom Brady's wife, yes.
  12. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    A few generalizations can be said but the devil is always in the details. The intake timing is not passive and can be precisly controlled. This can offer some power advantages. This also allows different rotary disks to tune it for different power bands. The disc does not suffer fatigue like...
  13. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    Rotary valves do have some advantages over reeds. I am really looking forward to seeing how this beauty performs. I know if I had one I would not take it apart to shoot some internal pics, but if love to see what it looks like inside.
  14. ghoffman

    ZDZ USA Is Bringing ZDZ Brand Back to the US! Whoo Hoo!

    I think I am in love!
  15. ghoffman

    Slow motion EF 91 take off.

    Some say the DA-60 is anemic in this plane. Seems ok to me.
  16. ghoffman

    Slow motion EF 91 take off.

  17. ghoffman

    GSN Congratulates Jase Dussia new MKS Team Pilot!

    Well done!
  18. ghoffman

    Extreme Flight 104 Extra 300

    I am working on a system of 1 turn fasteners for each of the 6 canopy screws that are from full scale applications.
  19. ghoffman

    Rant......Pre assembled fuel tanks.

    They are inherently incorrect, they should have Viton inside at a minimum.
  20. ghoffman

    Extreme Flight 104 Extra 300

    Funny you should mention that...
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