Really because I seem to remember my dad putting one on the yamanator long before you did. Matter of fact I remember you coming over and looking at his installation at Bensen Days and telling us you were considering doing it. You asked questions and dad told you the issues he had with the installation. He showed you the Sprag clutch that he had made that went between the gear box and prop. This he found was was necessary to swing the 70 inch Warp Drive prop he had on his machine. So you claiming you came up with all of this on your own when you clearly did not is quite frankly Bullshit. Maybe you should talk to yourself in third person some more and alter your post since you didn’t originate this. Seems to me you saw how my dad did it as the very first person to put a four cylinder Yamaha four stroke 150 horse engine on an aircraft and took two years to make your own version. I’ve heard that you said my dad‘s installation was not successful. It’s kind of funny lsince he flew for two years before he sold it never had a problem with it. He sold it to a customer who insisted on the throttle being moved to the other side the guy took some lessons and then ended up having a ground incident with it and it was totaled. There are plenty of people that saw it fly including yourself so I have no idea why you would say it wasn’t successful or pretend that you were the first person to put one on a machine. I would appreciate you correcting this inaccurate statement that you’ve made because it is not only inaccurate it is untrue. If you have an issue with anything I have said I would encourage you to come see me at any of the fly-ins we are both at. I’m sure we can settle it like men not like keyboard cowboys.
Check the date on this video it’s 2010. That’s two years before you did it buddy.
Great, I was expecting this. Now let's talk about it since you brought it up.
The RFD Yaminator was an APEX engine installed on a Dominator gyro that was never considered a success by its builder, let alone anyone else since it was beset with numerous problems which precluded safe, reasonable, cross country flight. In fact the builder swore to never build another "Yamaha anything" because it was so much trouble with such poor results and took him well over a year to get it in the air (mine took 4 months, start-to-finish and flight). And, no, he never did build another. In fact, Ernie convinced a whole slew of folks that the Yamaha was a terrible engine. And that sentiment lives on largely due to Ernie's high standing in the gyro community, most especially in FLA.
Ernie boyette started his project with a basic engine and ancillaries, less intake plenum and exhaust, instead of buying the whole snowmobile. That was his first of many mistakes, as he had a very difficult time trying to figure out the plumbing, electrical, intake and exhaust - let alone a PSRU attachment.
In fact Ernie never did get the wiring right and the aircraft was dangerously unpredictable with ECU problems causing forced landings over and over again. As Ernie put it to me, "It'll be flying along just fine when all of a sudden, with no warning and for no apparent reason, it cuts back to a fast idle and you must land at once. Then, let it sit for a while, and it will fly again. I can't figure it out. I'll never build another one. I'm going with Viking. Let someone else do all the engine work, give me something I can just take off the skid and install on one of my gyros and I'm happy. F___ Yamahas." Sound like a successful build to you?
Other, less significant problems went unaddressed, to include a grip heat warning light that wouldn't go away on the multi-function display (MFD).
There's more. The YG4 is a 5-valve-per-cyl engine which is dependent on good airflow, and upon which Helmholtz wave construction has a huge impact when the intake, and exhaust, are properly tuned - acting as a mini turbo when done right. Done wrong the engine will run fine at WOT but have terrible midrange power, resulting in "throttle lag" experienced by the operator.
Without having a stock airbox to use Ernie made his own. It was poorly designed with badly tuned velocity stacks, leading to significant midrange power loss, hence terrible "throttle lag". Next, the YG4 exhaust needs to be 21" from head flange to collector crotch for best power across the bandwidth 5000-10,000 ERPM. Ernie built his with 5" headers stubbed into a collector/silencer, which is fine for WOT but terrible for anything much below 9500 ERPM. Result:
really bad throttle lag.
The upshot from all this throttle lag was that the engine, producing very poor low & midrange power, would not start up and run without a clutch. Ernie convinced everyone - including myself - that these engines must have a clutch or they just won't start and stay running due to shaking below smooth idle settings (later proven wrong with Kurt Carleson's MAC YG4 Air Command in 2016, as earlier with the MAC Silent Drive YG4 Air Command c2015. Since then most of the MAC kits are sold with direct-drive, no clutch).
He went to Neil Hintz for a PSRU and clutch solution. They installed a sparg soft start clutch between the gearbox PSRU and prop. The sprag housing cracked. Not sure how many hours they got out of it, not sure if they ever got that problem solved or not.
The aircraft was sold as-is, not sure if they ever sorted out all the problems or not but I was told no one ever got it right.
Mike Boyette: Just like your dad's Apex, the Yamaha Phazer YG2 80HP project from Todd Reick was also "the first" of its kind. And, just like your dad's Apex project, it too was also a miserable failure. In both cases the builder gave up without solving the problems and getting things sorted out. In both cases an aircraft actually flew with the intended engine. In both cases the builders themselves declared the projects a failure, told others not to use these engines for aircraft conversions, and never attempted another similar design again.
AND - again - in BOTH cases, I was able to correct their mistakes, fix the problems, and do it right the
first time resulting in complete successes right out of the hanger with both engine types. Yes, I spent gobs of time studying Ernie's Yamanator and speaking with him to figure out where he went wrong and what I could be done better. "I stand on the shoulders of giants". Ernie is my hero. Mostly because no matter what, I could ALWAYS walk over and talk to him and he NEVER treated me with ANY of the disrespect that so many others here on RF enjoy doing with relish. And ketchup.
Ernie Boyette was far better than Greg Mills.
Todd Reick was far better than Greg Mills.
But where Ernie and Todd failed Greg succeeded - after much digging into their failures and coming up with better solutions.
And this resulted in
success with both these two engines converted for aircraft use - for the first time.
*********************************************************
Bottom line:
10 years, 49/50 satisfied paying Yamaha conversions parts & kits customers, and a bunch of
successful firsts:
- First successful YG4 2012 to fly
- First ever and successful RX1 2012 to fly
- First successful, commercially-sold, mass produced, Apex kit 2017 to fly (Another guy out west successfully - which means no interrupted cross country flights, Mike - put an Apex on a Highlander with a one-off cog belt drive previously, and provided us with the aircraft changes he came up with, required for the ECU wiring)
- First EAA Oshkosh Grand Champ Award to a Yamaha-powered aircraft 2018
- First successful Phazer YG2 2019
- First ever and successful 165 HP NA stock Yamaha YG4 EXUP to fly 2020
- ZERO FORCED LANDINGS DUE TO POWER PLANT FAILURE SINCE 2012, FLEET-WIDE.
The facts speak for themselves.
P.S. I asked someone I trust to read over my first message minutes after I posted it and asked for his honest feed back. He warned that the presentation was just too much, and especially off-putting in the third person. I chose to let the post stand w/o major edits, just some minor grammar stuff, maybe a word or two here and there.
Thanks to my friend. And to any others who may count me as a friend. I may stretch the truth to tell a better story, a-la "Big Fish", but, just as his son learned at his funeral, I am no liar. Never have been, never will be. In fact I cannot lie, it's part of the curse.