What an Incredible Engine! 

I remember when Yamaha put out the first 4 stroke snow machine engine back in 2003/4? The sled was an overweight turd, especially if you were at altitude/hill climbing. Then, someone put a turbo on it and the rest is history. Happy to see them in aviation

I learn so much every time Steve talks. I’m not a pilot but if I were, Steve would be building me a XL. The more I hear about the design, motor and console the more I want to learn. Thanks guys for the videos!

Can't imagine being behind 400hp in something that is that light. Wild and really cool yall!

This as well as all videos created by Steve and his daughter are in keeping with the tradition of an incredible vast knowledge of mechanics starting in his youth and continuing on into the passion of aviation. His willingness to share this to those of us just starting in the sport of STOL aviation is testimony to the infectious enthusiasm that permeates all of his videos. While I will never likely be using the horsepower that he is able to harness, its nonetheless comforting to know that the structural parameters and durability of the platform he is using his exactly the one I own. If it can take the stress and strain in his different variations you can rest assured that the limitations that aircraft provides are far greater than what I am capable of imparting on it. Again Bravo on this and many other educational videos..... Keep them coming !.

Talented Man,,,,

Hello from Minnesota! Great episode!

Really appreciate ALL the little details Mr. Steve 🤠🤠

Hey Steve - been watching you for a while. I watch another channel called Cleetus McFarland and he's gotten into aviation - specifically STOL with his Carbon Cub, and I think it would be magical if the two of you could link up. I know he would definitely enjoy seeing your skill in action and hearing your vast knowledge of STOL. I also think it would do a massive service to STOL to be exposed to his broad fan base who instantly gravitated to it. I'm just a 40yr old dad vicariously living through the two of you, but I have a feeling you guys would go together like peanut-butter and jelly.

A very informative video! I love hearing about the technical aspects of that aircraft 😊👍🏼

Nice! Thanks for sharing!

Cleetus has to meet this man.

Awesome video , and what an amazing engine . thanks 👍

Killing it Steve! Love your setup👍

Man o man this is a nice motor! Wish i had a part number to see if my dealer down here in Dominica can bring in one for me!

Excellent briefing Steve! Thanks.

This power plant you guys built is really nice ! I think your setup here is on the way - Super cool ! What a neat country camping aircraft ! I love it -

Very nice !

Awesome setup Steve.. cant wait to see it in action. perhaps you can do a video showing what it can do. another great video Sara thanks

Great combination of engine/plane and pilot! Been following Steve kick butt in the STOL competitions. Keep up the great work!

Cant wait to see you rock this weekend! Youll have to send some pictures.

Yee Haa Steve! Yee Haw! Powerd Up!!!

I run a RX-1 in my gyrocopter and one of Teal's original adapters for the rotax gearbox. No problems 5yrs running. Water pump is in tip top shape. Although I don't ring out my engine like you do racing I anticipate I won't run into water pump issues. Keep kicking it and thankx for all the yamaha engine development! Why ppl think Rotax is the bomb, well u described that well enough.

Great stuff, makes me want to Start a project with one of these Yamaha’s.

Omg, between you and Mike Patey, I'm a fish on a line. You rock. I've spoken to you on the phone some time back, but can't find your number yet. On an old phone probably. Just Wow!! Thanks, great dialog and info

I'm building a custom engine right now myself, nothing this crazy though. I'm building it to be able to handle 11k rpm and plan to run it no more than 6300. Same story though, finding the toughest possible internals and hoping for some reliability 😁

Hey Steve, do you have weighed the engine in airplane configuration and stock form? Just trying to understand differences to something that makes similar horsepower to a low horsepower version of this, around the 270-300hp range, such as an O-540 or IO-540 or similar.

Always enjoy your video's but this was great getting to here all about the new engine !!!! Thank you 😉 an super glad someone put a little of Sara in there to ❤😀

I know Teal has a Yamaha engine in his RV and appears to be having great success with it. You guys should get together and design a FWF for the RV’s. With the price and waiting times for a Lycoming, think there’s a huge untapped market there.

You've made a helicopter. 😂🚁

Great video thankyou Steve and Sara. With 400 HP in front, is pulling to the left much of a problem when applying the power on take-off? Also, what is the recommended TBO on the engine?

What are you using for the turbo oil scavenge pump?

since i was i child, i have dreamed of building my own airplane. recently i have been imagining a slow toroidal split level counter rotating multi blade design powered by a small turbo engine. maybe even active noise cancellation via multiple small speakers around the prop shrouds. i want to be as quiet as a hot air balloon floating by.

I think part of your success is your own personal power to weight ratio. If the pilot is light, the plane doesn’t need as much power to overcome gravity.

If you going to be at the EAA 292 Fly In and STOL Event in August, I have a small challenging airstrip I would like to see if it could support a Highlander. The strip is around 6 miles from the 7S5.

Definitely interested in changing out my rotax uls for this ! I have a Kitfox 7 though. How much different are they?

what turbo are you running Steve i am looking for on on a 998 genesis engine to

What RPM are you running it at? How many bar of boost to make the 300KW?

Cool

Really interesting engines. I'm always wondering how hard is it to find mo-gas at airports. Is it widely available at FBO's?

Dark Aero should have went with a Yam!

What is the installed weight, and I wonder what the highest time hours are on these so far?

Steve can we have a constant speed prop on the Factory spec 275HP turbo yamaha? I want to have an Amphib plane with some punch for getting off the water. I live in BC and we have allot of smaller high elevation lakes. 180hp doesn't cut it all the time. and more than that and you are getting heavy.

Supercool Steve!, which ECU? Motec or AEM? Using 2 electric water pumps helps to increase the max continuos power? Or still running on the 160+ hp? Yamaha have to hire you and Teal's to become development heads for the incoming aircraft emgines!

What turbo on your motor Steve?

What kind of burn rate on the stock version? Thinking of replacing the ea81 i run now

Wonder if there's an electric clutch for propeller reduction so you could use 6 blades.

Steve, what would it cost me to build a good 300 Hp Version of what you have there with the 3 cylinder engine and 4 blade prop. I know that is hard, your best guess.

Okay, What is it going to cost me firewall forward? And @ 9:47 in the video there's an airplane behind you in the hanger , How much ya want for it? I'm down here in Hal country , Elko Nv.

Im a newbie looking for guidance on what makes an autoconversion reliable. I desperately want to lower costs for GA, but I don't want to risk safety or fall prey to a low price tag due to ignorance.

Awesome! Do people know what the TBO is?

How to contact Hypersports?

I own a Yamaha MT09SP motorcycle, it has an 890cc three cylinder and is a spirited motor. Had no idea the engines from snowmobiles were being used in aircraft (Rotax?). Thanks for this video and all the best to you Mr. Steve.

I’ve been under the impression that this airplane is useless for travel. Do you actually travel and recreate in your race plane? I’d love to see some backcountry flying if you do!

Have used the electric Davies Craig water pumps on prime power diesel engines running over 10k without a failure if the unit.

🤗🤗💯💯

I wonder how this compares to a LS3 engine which make 426 Hp which is a stock engine with no modification, and weight is 410 lbs. You can get a LS3 engines for around 5 K. There must be other reasons that makes Yamaha a better engine. Is it more relievable or lighter?

Looks like my 2016 Yxz1000r lol

Usually mechanical water pumps don't fail they are so simple in general with most engines. Yamaha must have had a bad design. Rest of the engine is very well built.

เรียบง่ายแล้วก็ยอดเยี่ยมมากมันเป็นเครื่อง yamaha

Goodbye EdgePerformance???

Look that ftuuuuututututu

Engines turn me on in the morning 😂so yes spec's and engine details are a must..... And talk about VTOL. I do t think you should be allowed in the Stol races . Your aircraft is should be classified VTOL 😂😂😂 seriously 😮😊😊😊

The Yamaha engine has become the new rage, & a lot of sleds are now being destroyed, simply in order to get their engines. 2 strokes are simply getting to expensive to run, especially when a gallon of good quality 2 stroke oil is up to $50 or more!

Just try to install Toyota Prius electric water pump

Koenigsegg Gemera 3 cyl engine have the power you need 2 litre 600 hp

I’ve heard about people putting motorbike engines into small cars but this might be the first time I’ve heard of people putting one in a plane.

your nuts jr...

I'm sorry for me i would not want a clutch on an airplane propeller

What a stupid commercial, who would believe that beeing honest independent reporting

Steve, things have changed and probably not for the better. It would be nice if Formula One stuff didn't make it's way into American aviation. I'm not blaming you but you're at the forefront, like it or not?

"promosm" 🤩