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Oshkosh ’18 LSA Grand Champion powered by YAMAHA YG4i

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  • Oshkosh ’18 LSA Grand Champion powered by YAMAHA YG4i

    Steve Henry was my first customer in 2013. Then, in 2017 he wanted one of my latest Mohawk Aero Corps (MAC) Yamaha YG4i gearbox adapters for the 150 HP Apex snowmobile engines which, unlike the earlier RX1 motors, has EFI - something that high-altitude pilots love for obvious reasons.

    He had just started work on his sixth "Just" aircraft, and fifth "Just Highlander", the "Yee-Haw 6". He had it flying in time for the '17 season, and flew it to Oshkosh this year from his home on the western border of Idaho. Since my adapter was on it, I decided to make my first pilgrimage to Oshkosh and meet Steve there.

    As I drove up on Thursday, Steve called and told me he had won every STOL competition event at AirVenture so far, and gave me the time and location of the final contest to be held Friday evening.

    When it came time for Steve to compete, the announcer told the excited crowd that earlier in the week he had landed in 67 feet and wondered if he could best that now. His engine was noticably quieter than any other engine in the event, even as he revved up for take-off. When he released the brakes and hit the NOS bottle for another 40 HP (190 total calculated HP), it was wheels up in an incredible 57 feet!!!
    I have never seen any FW take off in 57 feet in this weight class or any other. Have you? Is this some kind of record for the books? No big surprise, Steve won Friday night’s STOL competition too, making it a clean sweep for the week not just in class, but overall.
    As I sipped my campgrounds store coffee and ate my toasted plain cake donuts (I stick ‘em in the bagel toaster to crisp the outside an warm up the inside) on a picnic table in the warm, Wisconsin morning sunshine, with a gentle breeze licking at my 3-day-old neglected shave, reading my EAA AirVenture daily free newspaper “Today”, I came across the announcements for all of the event winners.
    It said you can only win in any category once, and never win in that category for a lower or equal place again. And I read on through the list of winners until I came to the following:
    LIGHT-SPORT AIRCRAFT – RESERVE GRAND CHAMPION
    Steve Henry
    Nampa, Idaho

    I just heard someone ask, “Why is this of interest here, to the gyrocopter community?” Because it was the gyro guys who made this happen: first with Todd Reick’s Yamaha Vector YG3 Rotax C kit in 2007, followed by Ernie Boyette’s Apex YG4i AutoFlight kit in 2011, and then with Greg Mills’ RX1 YG4 universal kit in 2012 and again with the Apex YG4i universal adapter in 2017.

    By now there are about 100 flying Yamaha’s, the vast majority being gyrocopters and gyroplanes. We now even have a gyroplane manufacturer who is selling Yamaha-specific Eurotub air frames, known as TangoGyro.

    With the announcement of a Yamaha-powered EAA Grand Champion which also won every STOL event at AirVenture 2018, it is safe to say that Yamaha aircraft power has most definitely arrived, and is apparently here to stay.
    GT Mills
    Peachstate Rotorcraft Club

    Mohawk Aero Corporation
    PO Box 30133
    Savannah, GA 31410
    www.MohawkAeroCraft.com info@MohawkAeroCraft.com

  • #2
    some good news for the various Rotorcraft winners too
    ROTORCRAFT



    Helicopter - Gold Lindy
    Russell Kunz
    Neosho, Wisconsin
    Safari 400, N615RK

    Helicopter - Silver Lindy
    Geno Mancini
    Mountain Iron, Minnesota
    RotorWay Turbine, N420SX

    Gyroplane - Gold Lindy
    Chris Toeppen
    Atherton, California
    Auto-Gyro Cavalon, N40CT

    Gyroplane - Silver Lindy
    Andy LeBoeuf
    Gheens, Louisiana
    Auto-Gyro MTO Sport, N217LL

    Gyroplane - Bronze Lindy
    Gregory Spicola
    Brooksville, Florida
    American Ranger 1, N205AR

    Gyroplane - Bronze Lindy
    Dayton Dabbs
    Taylor, Texas
    Magni M-24, N678HJ

    Comment


    • #3
      I was getting to that when the editor timed out on me.
      GT Mills
      Peachstate Rotorcraft Club

      Mohawk Aero Corporation
      PO Box 30133
      Savannah, GA 31410
      www.MohawkAeroCraft.com info@MohawkAeroCraft.com

      Comment


      • #4
        Does that engine have one of those built in cassette gearboxes? Does one just get it to a certain gear and leave it there?

        Comment


        • #5
          Sounds like you thinking about motorcycles. This is a snowmobile engine, the APEX model. The external gearbox is attached to the engine by means of an aluminum adapter which is fastened to the crankcase on the PTO end of the motor. The gearbox is not a transmission, it is a transfer case that is a propeller speed reduction unit (PSRU).
          GT Mills
          Peachstate Rotorcraft Club

          Mohawk Aero Corporation
          PO Box 30133
          Savannah, GA 31410
          www.MohawkAeroCraft.com info@MohawkAeroCraft.com

          Comment


          • #6
            I heard the announcer say that this Dominator is a regular at AirVenture.
            GT Mills
            Peachstate Rotorcraft Club

            Mohawk Aero Corporation
            PO Box 30133
            Savannah, GA 31410
            www.MohawkAeroCraft.com info@MohawkAeroCraft.com

            Comment


            • #7
              Here are flight line photos, so not the best since it is fenced off etc.
              GT Mills
              Peachstate Rotorcraft Club

              Mohawk Aero Corporation
              PO Box 30133
              Savannah, GA 31410
              www.MohawkAeroCraft.com info@MohawkAeroCraft.com

              Comment


              • #8
                This is the Yee Haw 6 Highlander LSA Grand Champion with the 150 HP Yamaha Apex YG4i, Mohawk adapter, NOS 40 HP boost. Yeah, c'mon.
                GT Mills
                Peachstate Rotorcraft Club

                Mohawk Aero Corporation
                PO Box 30133
                Savannah, GA 31410
                www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                Comment


                • #9
                  Booth Display Gyros: Sport Copter, ELA. Noticed that ELA cleaned up their nose lines, this is a huge improvement over the way these gyroplanes looked when they first displayed at Mentone a few years back.
                  Last edited by NoWingsAttached; 07-30-2018, 12:08 PM.
                  GT Mills
                  Peachstate Rotorcraft Club

                  Mohawk Aero Corporation
                  PO Box 30133
                  Savannah, GA 31410
                  www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                  Comment


                  • #10
                    OK, so, like the wife, I am the last to know. These New Jersey guys have a company they call GyroDyne, bought out Ernie Boyette's RFD, like...last year??? wow. Flying under the hood, that's me. I just found this out while I talked to these folks as they were dismantling the c1960 Porsche-powered (certificated ? aircraft engine) contra-rotating helo (I don't recall the name of this machine, tho I've seen many photos of it on RF in the past.) that they plan to re-introduce in the future. As Stephen King's gunslinger would say in the Dark Tower series books: "The world has moved on."
                    GT Mills
                    Peachstate Rotorcraft Club

                    Mohawk Aero Corporation
                    PO Box 30133
                    Savannah, GA 31410
                    www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                    Comment


                    • #11
                      Magni stuff. I like the snap-on canvas doors. And this E-prop.
                      Last edited by NoWingsAttached; 07-30-2018, 12:06 PM.
                      GT Mills
                      Peachstate Rotorcraft Club

                      Mohawk Aero Corporation
                      PO Box 30133
                      Savannah, GA 31410
                      www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                      Comment


                      • #12
                        The "Surefly" Quad/Octo Copter.
                        GT Mills
                        Peachstate Rotorcraft Club

                        Mohawk Aero Corporation
                        PO Box 30133
                        Savannah, GA 31410
                        www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                        Comment


                        • #13
                          Rotorvox. This guy was asking if I could help him get his gyro company listed on the Rotaryforum mfg list. Please take a number...

                          This gyroplane was overheard whispering in my ear, "Yamaha me, pulleeeeeze!"
                          GT Mills
                          Peachstate Rotorcraft Club

                          Mohawk Aero Corporation
                          PO Box 30133
                          Savannah, GA 31410
                          www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                          Comment


                          • #14
                            Well, that's about it. The Red Bull helicopter was fascinating to watch roll over, and over, and over, and flip and even do a backward roll. Backward roll??? Wasn't expecting that one, no sireee. But there it was, in all her splendor and glory. That alone was worth the trip from Columbia, SC to Oshkosh WI.
                            GT Mills
                            Peachstate Rotorcraft Club

                            Mohawk Aero Corporation
                            PO Box 30133
                            Savannah, GA 31410
                            www.MohawkAeroCraft.com info@MohawkAeroCraft.com

                            Comment


                            • #15
                              Thank you very much for the photos! Amazing machines. Any video available?





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