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  • BBerson
    Was there a big static rpm change after the valve seat work? I would adjust the mixture with new plugs and check the color after 5...
  • BBerson
    The 2800 sounds about normal to me for static. What is the book number for static rpm? Dana said the 3200 is at 60 mph. The throttle...
  • BBerson
    I don't see any circuit breakers that reset after cooling down and toggling the master switch. But I do see some "not FAA approved"...
  • BBerson
    BBerson replied to the thread 10/23 Raptor Video.
    That is a bit too simple. In his test he has the fan blowing the flat backside of the prop. In flight the wind hits the curved...
  • BBerson
    BBerson replied to the thread 10/23 Raptor Video.
    I think he said " west coast". Could be Oregon or Washington.
  • BBerson
    BBerson replied to the thread Drivetrain Power Loss.
    For an airplane prop shaft the losses could be as small as the bearings, I think. Three bearings shown here, but only one additional...
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  • BBerson
    BBerson replied to the thread 10/23 Raptor Video.
    Certified airplanes sometimes have rpm avoid zones. Marc's prop came off with some airframe damage but the landing was a success.
  • BBerson
    Yep. My spar failed first test also. That compression cap is a bugger.
  • BBerson
    BBerson replied to the thread A solution looking for a problem.
    The Questair skins were stretch formed with hydraulic cylinders, as I recall, from the Sport Aviation article.
  • BBerson
    BBerson replied to the thread Prop shaft.
    One guy on the yahoo small engine forum flew his vertical shaft Briggs with the 90° belt drive on his powered parachute. I would think...
  • BBerson
    BBerson replied to the thread 10/23 Raptor Video.
    Cirrus floundered at the beginning with a pusher. Pusher has never seen a mass certified market, as far as I know. Cirrus abandoned the...
  • BBerson
    BBerson replied to the thread Prop shaft.
    Long V belts can be a shaft alternative. The engine would be vertical shaft like a Briggs 810 or two- stroke mounted vertical. The belt...
  • BBerson
    Do you remember the prop rpm direct drive in static, climb or cruise? I see it is rated at 6300 rpm, but doubt that is used direct drive.
  • BBerson
    BBerson replied to the thread 10/23 Raptor Video.
    "At this point a simple mechanic is smarter at implementing something than a claimed engineer." He doesn't claim to be an engineer or...
  • BBerson
    BBerson replied to the thread A solution looking for a problem.
    Water pressure is relatively safe.
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