This gas-turbine engine has insane power 

I could see this on a small kit plane.🙂

@Alex Fracyon closest looking thing would be the pratt and whitney pt6

Yes it's a turbo prop

Wanted to be an air plane mechanic but the boat world called.. and in my area plane mechanics are a dime a dozen but the boat side is a dying breed...

Do you know engine's brand??

Really? Please explain

Agree,...I didn't like the sound of that gearbox . .....

People like this never fly them. They bring them out 20-30 times “testing” them. Watched a guy with a turbine jet for 4 years bring it out many times and never fly once.

You can do more than imagine. You can experience.

Like how do they cool the lubricant in that gearbox?

Came here in comments just too see if anybody had the same impression and I wasn’t wrong. Not a specialist from turbo prop engines tho...

I hear what you guys are hearing too- having worked at an airport for several years that noise could also just be the prop

@@philipm33 thouvh you may be right ,it really didn't sound like prop pop.

Yeah I was hearing it, too. Sounded “crunchy” from the moment the prop first started moving. Also, there’s a weird oscillation of the prop spinner at around 1:06 that didn’t look real healthy, either. Not knocking the owner/builder. Just observing and hoping if these are legitimate issues that they get them worked out.

Yup, sounds really bad. Like the gear box is about to disintegrate

Possibly the starter motor still assisting the gas generator / high pressure turbine stage to get up to self-sustaining speed.

I found these the other day when I was looking. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_z90FmRj9s4.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-d-UP0v15wjc.html

You and me both my friend ,that would go perfect in my tucano

There are and have been for many years R/C Palatis , Air Tractor, and others flying on turboprop engines.

Here is another nice one, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-27faFrwO7KI.html

Actually turbo engines dont spin as fast as NA

@@Surferant666 Referring to the turbo itself, of course.

@@bliglum no. the engines rpm...

@@Surferant666 I know. GT3 Porsche N/A revs higher than GT2 boosted, of course... But again, I was referring to the turbo's actual turbine speed (which I think the new Nissan Z is going to have a gauge for? very cool). Did you know you can take a car's old Turbo and make an actual working Turbine out of it?! It's true!

@@bliglum yes of course im a nuclear engineer. Turbos add torque.... Revs add Bhp And modern turbos are electrically boosted for anti lag and regen boosting for the drive motors.

Imagine the FPV experience from all those dollars.... :)

More like splinters... lol.

Wonder how fast it will go?

@@xod7861 thAts an excellent question. Need to dyno test the thrust and calculate the drag coefficient.

@@michaelshultz2540 awesome looking plane . fabulous engineering in that small turbine.cant wait to see it fly

Better to waste it on the ground, than not test and have something go wrong and it SPILLS onto the ground after a crash.

I'm deaf from gas turbine noise... you guys be careful....it doesn't take much to do damage

Everytime I see you a high power RC I think could that carry a bomb

@@gingernutpreacher why would you even say something like that? Thinking like that is why we now have all these stupid rules on our hobby. Wow.

@@MPRasta104 you know Ukrainian the biggest use of drones and RC and you need rules to many people flying blow and in to controled air space

I have some bad news for you. K-100TPG4 SPECIFICATIONS: Maintenance cycle: 25 hr US$550

@@airtightbox And, new turboprops start at $2.5 million.

@@TM-tw1py That would scale as $344,611.53 for the 25 hour service as this engine is $3990.

Thanks. And the rev of the prop or reduction?

You mean 14000 rpm Edit: I guess a turbine can spin at 140,000 rpms I thought for sure that was way too much but its probly because I'm used to dealing with car and motorcycle engines that peak around there, not turbines that spin so much faster. My bad, boys, ill take an L on this

@@ericberger6966 Power Turbine rpm is probably about 60% of Gas Generator (14000 max). Maybe someone can identify the gearbox from the video and confirm the prop speed.

Power:13KW ( 6200 RPM )

Maximum Turbine RPM: up to 140,000

Lol, just wrote that but you evidently beat me to it 😀

Jetcentral also has one. It’s based on their Bee II turbine. I owned one for about 5 years till a mishap at “Joe Nall” in the fall last year.

Turboprops burn more fuel, unless you are in the lower flight levels. Most unpressurized GA aircraft are going to get better range with piston engines.

Free-turbine turboshaft is a form of turboshaft or turboprop gas turbine engine where the power is extracted from the exhaust stream of a gas turbine by an independent turbine, downstream of the gas turbine.

@@182QKFTW I was wondering why the prop wasn't turning in sync with the engine. Pretty mucht he same as a fluid transmission but with air pressure instead of water pressure. I was interested to use the same such system in a quad copter with a central gas turbine driving either 4 ducts or 4 variable speed or variable pitch props. Variable pitch props are a mess to work with so some more elegant solution with less moving parts controlling the thrust to each arm would be more desirable.

It looks like there is a gearbox even?

@@somedumbozzie1539 it would be a "Free Turbine" taking power from the gas generator exhaust (Turbine Engine). In a PT-6 style engine it would goto a Planet Gear for reduction, then to the prop. A real PT-6 would probably spin under 20,000 RPM before reduction

@@rkan2 yes, there is. The power turbine spins a lot slower than the hi pressure turbine, and then it needs to be reduced down to a prop speed.

Hp to hp turbo prop is no faster. However it is gerally easier to get more power for less weight and size and that helps you go faster.

Low tec turbines for electric trucks has been talked about . Cleaner burn and tuned to run at one speed driving a generator. Without the aero spec and weight restrictions its just a posh turbo.

@@George.Andrews. yes thats how the jet engine was developed from- a turbo... Maybe add dome useful info instead of sounding like a know all ta. 😒👍

@@George.Andrews. the great thing about jet engines is that they can use many fuel sources including coal and diesel

Volvo did that in a concept car in the 1990s and Jaguar in a concept car about 2010.

@@zapfanzapfan Rover did it 1950

This airplane is PC-21 (propeller 5 blades). PC-7: propeller 3 blades.

Cavitation damage running in air 🤔? That’s something that occurs to boat props in water. Cavitation in an aircraft prop just causes thrust to drop off.

@@pk-so1mj And the density of air compressed by near supersonic passage of an object,....? It's not called Fluid Dynamics without good reason. :) If you check photos of some higher speed prop driven warbirds from WW2, you'll often see where the paint has flaked off out near the tips due to the same issues.

@@PiDsPagePrototypes I think you are getting your terminology mixed up here. You said cavitation damage. Cavitation in an aircraft prop is a called a prop stall and is where the smooth flow of air breaks away from the propeller and causes a massive drop off in thrust. This can happen way below the speed of sound and was even demonstrated while completing my pilots licence. Are you referring to shock wave damage from breaking the sound barrier? Either way the typical maximum prop rpm in one of these is around 8750rpm. It looks like it has around a 21” diameter prop fitted. Working the numbers on that gives around 278m/s. The speed of sound is 343m/s.

@@pk-so1mj nope. I'm definitely talking about cavitation. You can figure out the rest.

The gearbox I think. Sounds like high-clearance gears.

It has flown.

@@xjet link to the video?

@@FrizFPV I didn't bother videoing it... had other things to do.