Is this the world's most powerful home-made jet engine??

[@cerberes]

any day spent spooling up your home made jet engine is better than a day at work.

[@racketmotorman]

Sure is

[@Robertxcapricorn]

Spoiling a days and a lot of oxygen as well

[@JetManJoe]

Very Australian wildlife sounds that are all too familiar 😅. Great stuff

[@racketmotorman]

Yep , no need to add them in 🙂

[@brocksterification]

Amazing work John. Thank you for sharing your work and knowledge. 👍

[@racketmotorman]

Thanks 🙂

[@wags9777]

You have to be next level intelligent to not only dream this up but to make it a reality

[@racketmotorman]

34 years experience building homemade jet engines helps , checkout my KZbin channel , theres bikes and karts turbine powered

[@Turbojetkart]

Wonderful, thank you for doing this Andrew..... thank you john for all your help over the years 🙂

[@racketmotorman]

Hi Andy , a suitable last video 🙂

[@Turbojetkart]

@@racketmotorman yes..... still think the freepower unit in your shed needs some work

[@pointofinterest5981]

Is this self sustaining? Or you are simply burning fuel and rotating it with some electric motors? Please Reply

[@racketmotorman]

Yep , self sustaining , its a gas turbine engine with an afterburner , spins up to 58,000 rpm , 4lbs/sec of air flow , 9lpm of fuel burn

[@pointofinterest5981]

@@racketmotorman Great hard work must be done by you, thanks for replying

[@alanung]

The red glow of the afterburner was awesome! That jet should come in handy for overtaking....:D

[@wags9777]

Pretty sweet jet engine on a $100 trailer

[@racketmotorman]

LOL.......................it cost me more than $100 when I bought it 40 years ago , its had a tough life

[@Rincypoopoo]

Brilliant. Agent JZ has a video on how loud after burners are. VERY. Super cool.

[@racketmotorman]

Yep , they're loud when standing just a few feet from them

[@jettoymaker]

A great way to finalize a long hard won battle with the laws of physics. Now to get it up in the air like you initially set out to do when you first started this journey so many years ago. A magnificent job done sir.

[@andyvonbourske6405]

damn ! how much thrust was that making ? my screen is to small to read the scale

[@racketmotorman]

290 pounds this test , but has been up near 400 on an earlier test , checkout my channel for more vids

[@squarefour1]

That definitely is working very well. Impressive

[@racketmotorman]

Thanks , not too bad for a backyard jet engine 🙂

[@evangelicalsnever-lie9792]

How close is this to the earliest jet designs the Germans used? Thing fired right up and sounded so smooth.

[@racketmotorman]

Only that it has both radial comp and turb wheels

[@vazione5410]

I wish you Good luck with optimizing this build ! Following on the forums since the start 🎉.

[@glumpy10]

Which forum?

[@Praendy]

Hi, the forum link. Jato proboards diy Cheers Andy

[@kevinhawkins6811]

Hey Racketmotorman, im seeing your videos for the first time. I belive we met on the pulse-jet page years back. Funny how im seeing your stuff just after i posted on the pulse jet page today. Its good to see you still at it!

[@racketmotorman]

Yep , still at it , coming up to 35 years since I first decided I wanted to build a turbine powered motorcycle and got hooked on the hobby 🙂

[@kevinhawkins6811]

@@racketmotorman I joined the page in time to participate in the great ramjet challenge. My name on there is redneck. Good to run into you out in "the wild". Following you to see all your videos.

[@mikeyo4406]

How much thrust does it make?

[@aSpyIntheHaus]

Oh wow! That sound when the AB fires, I'm glad that it's not just me who's child sounds like that.

[@racketmotorman]

Yep , the A/B creates another 40% increase in the gas velocity , up to >2500 ft/sec

[@Rayxl1]

That's impressive. How many pounds of thrust does it generate?

[@racketmotorman]

only 290 on that run but has been up closer to 400 kzbin.info/www/bejne/Y4esomqkpM-LnbM

[@MuggaVirtualPilotMVP]

What fuel pump setup are you running?

[@racketmotorman]

An automotive EFI 044 pump running on 24 volts

[@MuggaVirtualPilotMVP]

@@racketmotorman I am NSW based and building a 350lb thrust jet. Would love to speak with you. How do I get in contact?

[@racketmotorman]

@@MuggaVirtualPilotMVP Try . [e-mail] 350 lbs is a decent sized engine 🙂

[@CharlesVanNoland]

Oh good, this isn't another pulse jet video. While the crazy rocket man is awesome because he's an old cat who actually does stuff with them, shows himself zipping around the flats, pulse jets are otherwise a bit boring now in these modern times. I'm always wanting to see some more involved jet ingenuity cooking like this! :]

[@racketmotorman]

This is a lot more involved than a pulse jet , though my PJ was a tad more complicated than the average kzbin.info/www/bejne/q6Kwn2N3Z8aImtE&ab_channel=AndrewMartin , I don't might riding my creations either kzbin.info/www/bejne/p5Cwg4iujKqCkJI&ab_channel=AndrewMartin kzbin.info/www/bejne/fF7JlJyVdtGBg7c&ab_channel=AndrewMartin

[@rogerhargreaves2272]

Brilliant job! Good parking brake too!

[@racketmotorman]

Hard on and the gearbox in PARK 🙂

[@tonermaloner6718]

nice one john, i was to see this one didn't have a crack in it.

[@BrendanAus]

A symphony of Newtonian hysteresis! Awesome.

[@racketmotorman]

Yep , one lot of mass going that way means mass should go in the other direction , heh heh , it certainly would if it wasn't chained down 🙂

[@peternewman958]

I was going to suggest using a blower to cool down the jet as most jet engines move through air or idle to cool down. For 18yrs I operated several J34 Westinghouse engines at Willowbank raceway to dry or blow ash from the track. As the nozzle pointed downward once the engine was running you couldn’t stop so I would shut down and the driver towing me would speed up to allow cold air through the intake.

[@racketmotorman]

You probably know Smithy , Brett's a mate of mine , operates an A/B kart , my trusty leafblower has been both starting and cooling my engines for nearly 30 years , too lazy to change to anything better 🙂

[@barthchris1]

Hearing protection for the wildlife or the jet engine?

[@dakka951]

Nice work John.

[@racketmotorman]

Thank you , it give a good representation of what goes on with a test run

[@Praendy]

Hi John, Love the video and the incredible sound of theeee birds🤣 At least you didnt have any major problems at the last testrun👍 The birds will miss the noisy engine. Andy

[@racketmotorman]

Hi Andy Lotsa birds where I live , plenty of colourful parrots that screech all the time , yep , eventually everything worked , unfortunately the poor weather conditions reduced thrust a lot , but thats to be expected.

[@lexloose2112]

wow! what a wicked machine! I'd be watching from a mile away behind an inch of lexan!

[@DinoAlberini]

Awesome! What’s the reading on the dynamometer?

[@racketmotorman]

290 lbs of thrust , its lower than the normal 350 lbs due to ambient conditions , same volume of air going in but its mass is less .

[@julianpalmer4674]

The most impressive way I have seen the Heath Robinson design methodology bought into the 21st century. Well done

[@racketmotorman]

Its a backyard shed build , nothing fancy

[@kevinhawkins6811]

Did you get any Mach diamonds?

[@racketmotorman]

@@kevinhawkins6811 Nope , not enough pressure in the A/B to choke the nozzle , pretty hard to produce that pressure with only a single stage comp

[@Ben742011]

Nice build, hope this video gets more views? Greetings from Norway.

[@andygough4836]

fantasic john that impressive . will you ever mount it on anything ?

[@racketmotorman]

Hi Andy , Someone else will be taking over that job , I'm finished with it

[@andygough4836]

@@racketmotorman well John his a lucky man. I helped Andrew with that bike with your motor in and the turbine was lovely

[@racketmotorman]

@@andygough4836 The 9/94 engine was a pretty good try at making a reasonable sized engine using a turbo rotor , in hindsight and the passing of 15 years and the availability now of newer bits it needs revisiting , but Andys last engine was a better outcome ...........................LOL, his new one ..................well , its gunna be fantastic 🙂 much better than this one of mine , thats the sort of progress we like to see in the DIY community , can't wait to see it operating in anger 🙂

[@125brat]

Nice idea and engineering, but it appears to be fixed throttle so do you plan to make it variable on the dry engine? It's a single-spool centrifugal compressor I presume with a single stage axial turbine? Do you plan to modulate the reheat and how do you plan to optimise and vary the reheat thrust or will it remain as on/off only? If someone is looking to fit this in an aircraft, what type of aircraft? You'll need an awful lot of heatshielding, reliability testing etc as well as some way of varying the thrust and a lot of fuel for even a short flight.

[@racketmotorman]

Its all variable , but when you want A/B , you generally want max thrust , No axial wheel , just a turbo radial inflow , this is a backyard jet engine using turbo bits , even the brass bearings . Full build thread on JATO jetandturbineowners.proboards.com/thread/1459/11-127-manned-flight-engine Theres heaps more videos of testing on my KZbin channel

[@glumpy10]

Brilliant. I see some very cleaver design ideas used here too. I wonder it it would be possible to get the AB to run on waste oil? There is certainly the heat there to phase change it from a liquid to a gas, igniting it from there should be no problem. Could run the thing all day then with no fuel costs. What is the fuel delivery rate for the AB at max power? Can calculate the thermal output from that.

[@racketmotorman]

It would be possible , heat it first to thin it down , fuel burn rate of my 2 part petrol 1 part kero brew is 6 lpm to the A/B

[@crankhandle]

Wow that's an amazing accomplishment! You seem to have a good intuition on what will work with what. have you got any recommendations on a compressor and turbine wheel/ stator combination that could produce 20/40kg thrust?

[@racketmotorman]

It'll depend on what sort of engine you want to build , there lotsa turb wheels and NGVs on Alibaba that would fill your needs , you'll be needing ~ 1.5 lbs/sec of airflow

[@growleym504]

How many pounds of thrust? Fuel consumption rate at full power?

[@racketmotorman]

up to >350 lbs on A/B at 9 lpm fuel burn , 3 to the gas producer and 6 to the A/B , only 290 lbs this test due to ambient conditions unsuitable for producing max thrust as with all gas turbines.

[@growleym504]

@@racketmotorman Ah. Okay. Well, small jet engines are not known for fuel efficiency, so that's not so bad. Still, a very cool project! Do you know what your max compressor RPMs were? What did you use for bearings? fixed blades, or variable? It's cool that you are doing this without any processors or electronic control. Good luck, and onward through the fog!

[@racketmotorman]

@@growleym504 Max RPM ~58,000 , bearings are standard brass turbo bearings, this is a backyard engine , nothing fancy /expensive . Yep , SFC is a thermodynamic thing we can't beat without higher pressure ratios and component efficiencies

[@eugenekochnieff7055]

What was the max thrust measured?

[@racketmotorman]

290 lbs this test but have been closer to 400 lbs kzbin.info/www/bejne/Y4esomqkpM-LnbM

[@staryduren]

looks great!

[@racketmotorman]

Thanks , she's a rough backyard build , but does the job , its only the experimental proof of concept engine

[@richardjohnson8009]

Will this be put on a craft eventually?

[@racketmotorman]

Hopefully , but not by me , I've a mate who wants to pursue that

[@djisydneyaustralia]

What’s the nozzle material? Inconel?

[@racketmotorman]

Stainless steel 304

[@martinda7446]

The gauge showing (lbs or kilos)? thrust is so poorly resolved it is impossible to see figures or units apart from the 350 in the middle pen mark... What was max pre and post reheat? Great stuff though.

[@racketmotorman]

Both , the energy coming from the A/B affects the camera , its already died twice , max dry thrust is ~250 lbs , wet 350+ kzbin.info/www/bejne/Y4esomqkpM-LnbM we can only get a 40% increase in thrust by afterburning

[@martinda7446]

Thank you very much Excellent.@@racketmotorman

[@shanakaliyanage6875]

Love your work! If my memory is right, it was you who wanted to use this engine in a home made aircraft. Am I correct?

[@racketmotorman]

A friend does

[@shanakaliyanage6875]

@@racketmotorman that's gonna be awesome 👌

[@chuksanthony7065]

Indeed it is!

[@RuanPretorius49]

Loving the ear protection, Safety First! 😂

[@racketmotorman]

Always ;-)

[@zeuso.1947]

How much thrust? Next video, you taking off in your jet.

[@racketmotorman]

kzbin.info/www/bejne/Y4esomqkpM-LnbM&ab_channel=racketmotorman

[@zombieregime]

Was I reading that scale right? 130lbs of thrust?!?!

[@racketmotorman]

Its capable of a lot more than that kzbin.info/www/bejne/Y4esomqkpM-LnbM

[@mikeyo4406]

I had bad reception and couldn't get the quality to see thhe numbers 😢

[@racketmotorman]

The thrust camera gets badly affected by the afterburner "energy" , it registered ~290 lbs on this run , very hot day , high humidity and low barometric pressure , worst conditions for a gas turbine so thrust was down , but its capable of 350 lbs

[@mikeyo4406]

@racketmotorman that's awesome! Good work my friend

[@wags9777]

And for the next event we watch the jet trailer push the car down the highway

[@nooblamingo9185]

That thing is crazy

[@racketmotorman]

Just slightly , but interesting as well

[@peternewman958]

Another thing John is look at using piezoelectric ignition rather than spark plug , i doubt plugs will last long in the hot section. I must see your other videos as to how you built the turbine etc. Obviously its well balanced or that thing would shake like mad.

[@racketmotorman]

I've had no problems with the plug previously , it simply got covered in crap and needed cleaning , .........................its powered by a car coil and a set of points mounted on a small 12V motor , I've been using it for nearly 20 years without problems , the plug probably needs to be "adjusted" , but as it hadn't given problems, why fix it , but it probably needs a better plug than just the old second hand one with unknown heritage thats in it . Its extremely well balanced , plus the brass turbo bearing keep rotor dynamics under control , theres a lot of shaking at low P2s due to turbulence within the A/B but that soon disappears as the power is increased . Theres a full Build Thread on JATO jetandturbineowners.proboards.com/thread/1459/11-127-manned-flight-engine

[@dkjens0705]

Looks like it developed just under 300Kg or 3,000Nm of thrust.

[@racketmotorman]

Nope , max thrust ~~160 kgs , there are basic aerodynamic and thermodynamics constraints to thrust production

[@MrBanzoid]

Brilliant! Have a like and sub. Thank you.

[@seamuscashin2606]

if you create a monster you are going to have to feed it ,ie what is the thrust to fuel ratio anyway the greens will love it

[@racketmotorman]

Yep , pretty poor SFC but that applies to all A/B equipped engines running "wet"

[@DanielMorales-zq1xn]

Fabuloso!!!! Y la policía en tal caso que haría me refiero yó algo así en Argentina me decomisan todo

[@alhinfadi667]

Why ?

[@kevinroberts781]

Id be using that to push my car around town

[@sohail9363]

Good

[@racketmotorman]

Thanks , hope you enjoyed the video

[@wags9777]

My guess is just on size alone that this is not the most powerful homemade jet engine in the world. However it is pretty stink and cool

[@racketmotorman]

Could you please provide a Link to the more powerful one , otherwise you're just another know it all nobody

[@raymondwoods2304]

What about getting in the car and going for a ride?

[@racketmotorman]

LOL....................I've already made and ridden a turbine bike at 200KPH - 120 mph decades ago , nothing will ever beat that buzz , build pics jetandturbineowners.proboards.com/thread/1366/tv84-turbine-bike

[@arrowdriver007]

I think I shipped you some turbos about 15-20 yrs ago.

[@racketmotorman]

nope, I was already out of using turbos by then

[@arrowdriver007]

Would love to see a picture of the hot guide vane assy.@@racketmotorman

[@racketmotorman]

@@arrowdriver007 full build thread jetandturbineowners.proboards.com/thread/1459/11-127-manned-flight-engine

[@djisydneyaustralia]

8:49 sounds like the kettles boiling Nan, milk and two?

[@NANDOFFDataRecovery]

Some new underwear for the guy in blue.. Awesome video thanks for sharing. Some fantastic engineering

[@racketmotorman]

Yep , he walked into the A/B firing off , I didn't see him coming , hehe hehe 🙂

[@NANDOFFDataRecovery]

@@racketmotorman haha.. that pulse is visceral mind. Enough to make anyone jump

[@clivestainlesssteelwomble7665]

Definately the LJK Setright school of engineering.😂🧙‍♂️🇬🇧😎👍🏼

[@ArneChristianRosenfeldt]

There is a video of a homemade two spool turbofan engine on KZbin. I bet that it has more power - too much even for the 2:1 star fighter models.

[@racketmotorman]

Link please , I'd love to see it ............. why do guys say things without ever putting up the facts

[@ArneChristianRosenfeldt]

@@racketmotorman because the App makes this difficult. kzbin.info/www/bejne/aarHlmygr6troassi=9ujUZMbBFf-xmFN_

[@michellearrington4846]

I won't be anywhere near it when you try to find out. I can't even watch this.

[@racketmotorman]

LOL.......................you're not alone 🙂

[@douglasschaefer3750]

A tea party for two

[@annpeerkat2020]

I can see how.... but good manners hold back the why question... I mean, if the end goal was to have it bolted to the roof racks of the commodore, I could see things as just a step on the path of extreme engineering.

[@racketmotorman]

Because I wanted to , its for an aircraft

[@thieltech1]

Let that thing Rip ! Full tilt for 5min while driving car ! Then we know u got something,!

[@racketmotorman]

LOL ..................5 minutes at 9 lpm =45itres of fuel ..............are you paying for it ??

[@troelsnielsen2848]

@Integza tought about you ;)

[@racketmotorman]

Thanks 🙂

[@jimmarburger611]

Is there a turbine setup in the exhaust flow to spin the compressor blades, or does this require external power to spin the compressor? I ask this because a jet engine is self sustaining, it doesn't require external power past the startup. It's kinda the hallmark requirement for a jet engine. I've seen numerous videos of people and their home made engines and they've all (That I've seen at least) need continuous power applied to a motor to spin the compressor and all they've really accomplished is to make is a powerful blow torch. While I admire the ingenuity it takes to design and build such a machine it's not really a jet engine. Perhaps maybe an air breathing rocket... lol

[@racketmotorman]

Yep , theres a turbine in the gas producer section producing ~500 HP to drive the compressor wheel at 58,000 rpm

[@Jack777Er]

Did you actually just tell him how a jet engine works as if he doesnt already know, and then say this isnt really a jet engine. 🤦‍♂️🤦‍♂️🤦‍♂️ Jim, get off the internet... lol

[@jimmarburger611]

@@Jack777Er No, I asked, you troll. I applaud his accomplishment, it's awesome. I was explaining that I have seen a whole list of videos where this isn't the case. I'm more than happy to know that he doesn't fall into that category.✌

[@racketmotorman]

@@jimmarburger611 LOL...................it'd need to be a pretty big electric motor to spin my comp , its got a 5"inducer and flows 4 lbs/sec - >3,000 CFM and pumps it to 58psi 🙂

[@jimmarburger611]

@@racketmotorman No doubt, I'm glad it's as it is. Did you make your own compressor stage?

[@freanz3000]

bro das schreibt man ''raketen''

[@racketmotorman]

Racket means noise , the name was also given to me by a Hungarian friend

[@godoegor8431]

WHY?????

[@racketmotorman]

Why not ??

[@giveitatryguy6784]

When it boosts it sounds like my ex girlfriend screatching then she put on as few pounds but lost boost hahah

[@Carlista_Sixtino]

Le voy a dejar un enlace donde sale un modelo casero que parece funcionar muy bien, por si le sirve de ayuda para compararlo con el de usted, saludos. kzbin.info/www/bejne/hImbpJ-Njqqips0si=XfnuLPFtRjy0Ey5z

[@crankhandle]

First to like

[@thejollyfrog2791]

I want to know how fast his top speed with that trailer attached has he done in his car

[@racketmotorman]

Heh heh , not very fast , I'm scared the test stand will fall apart