Jet Engine Thrust Test - Fuel Experiment (Jet-A vs Diesel vs BioDiesel vs HydroDiesel) 

The neighbors love him.

Jet engines are a masterpiece of engineers work.

As an engineer (BSEE) I enjoyed not only the experiment with different fuels, but the science and the mechanics behind constructing that engine. Well done!

Ok...I'm an aviation mechanic and a CJ-3 pilot. I have to say this blew me away. Almost all turbine engines are certified for different fuels including gasoline for a limited amount of time. I've run 100LL in pratt engines with zero problems (limited to 150 hours with pure gas). The Williams Air Research engine on the CJ are NOT certified for operation with gasoline. This test shocked me. It must be a viscosity issue. Jet A produced the most inter turbine temp and highest RPM as well as the most thrust. Williams engines don't have nozzles or injectors, they have a "slinger" and are operated by FADEC (full authority digital engine control). I don't think you could have put on a more pertinent test. It literally changed my mind about several things. Thank you very very much!!! By the way, lubrication from the fuel has no particular benefit for the engine. The only place it could make any difference is the fuel controller itself. Prist is an additive that keeps the fuel from freezing and will prevent microbials from growing. But it is corrosive and has to be used sparingly. Most engines are restricted to .015% or 1.5 gallons in 1000 gallons of fuel. If your fuel isn't heated by bleed air or other you WILL be using prist or your fuel will gel and may flame out....ask a guy that has experienced...oh...that's right...it was ME! 29,000' in a Pilatus PC-12 the fuelers didn't add prist. It didn't fully flame out but it DID become a glider real quick! I had to dead stick into DAL from FL290. DID find out how well a PC-12 glides! hehe

The neighbors: Hmmm, I don't remember buying a house next to the airport.

As an helicopter mechanic for 23 years, I can tell you this test went exactly as I thought it would. Each of the fuels has its own specific gravity, and unless the metering jets are adjusted to compensate for this you'll get weaker power due to incomplete fuel burn. The reason that the hydro diesel did better than the other two is due to physics. The water in the fuel cools the air as it is injected, this increases the aircharge in the combustion section much like nitrous does in a car. Older turbojet engines actually used a water injection on take-off(though it was injected into the compressor section not the combustion section) to increase the performance of the engine. The AV-8B Harrier still uses this today, to boost engine power when in a hover. Jet-A is a very dry fuel, and is anhydrous, and soaks up water like a sponge. This is the reason why a lot of airplanes will put an additive known as colloquially as Prist, though many manufactures make it now, that lowers the freezing point of the water suspended in the fuel to prevent ice build up on the fuel filter screens. So, that pretty much means, hydro-fuel will more than likely not be coming to an airline near you any time soon.

That was extremely interesting, as I knew a jet engine can run on almost any kind of fuel, but I didn't know how effective alternative fuels are. Awesome stuff.

After 81 years on this earth I,m rejuvenated. Brilliant engineering. John from Oz

Your garage have more tools than my university

Absolutely amazing testing! A+++ dyno build and really enjoyed the RC jet engine testing!! Looking forward to your next episode! I'm planning to test the lubricity of the 4 fuels soon.

Great video. As a 45 year A and P. It was interesting to see the different fuels. As a side note the best was to pour out of a 5 gallon drum is lay it on a bench with the bung on top, then slowly roll it. It is then easy to control the flow..

You Sir are an absolute genius!! I cannot believe the engineering skill and knowledge on display in these videos..I've never seen anything so brilliant!

The jet engine: Starts to sound loud The subtitles: [Music]

Idle is 35,000 rpm. The precision engineering these parts must require is unreal.

This was just spell bounding, I had a very hard time taking my eyes off the screen for even a moment. Amazing!

Absolutely amazing channel. Can't say enough about the work you do.

Some people are asking me where to get the HydroDiesel here's where I got it $1.80 a Gallon, Trillion, LLC, John Leonard Email: jleonard@trillion.energy

Lol, the close captions say "Music" when the turbine is accelerating. Yes, youtube, indeed, lol

GREAT video, from the photography, testing methodology, and all the other stuff that goes into it.

Lemme give you my summary of Fuel Experiment: picture - 100 sound and music - 100 topic - 100 conciseness - 100 Overwhelming!

Man you bastard🤣🤣🤣! I'm supposed to be working right now, but this is too exciting not to watch... immediately. Hiding in the broom closet at work watching with headphones. That thrust dyno is fucking rad bro!

I dont know why but I am so in love with jet engines. This spooling, this massive amount of power...just amazing!

Amazing video and very surprising results. You've done amassing job creating this video, really enjoyed it.

Excellent build and interesting results at the end.

Watch this man's simple trick to make flying a jet fighter less expensive! Navy mechanics hate him!

Wow... what a marvel of engineering. I'm imagining the forces everything must be under and it's just mindblowing. And to think this is so tiny compared to one from a plane! Truly appreciate this video!

The sound is amazing. Thanks for this perfect video.

Thank you for the hard work creating great content!!!

The gigantic flask is back!

Jet engines makes noise* YT: This is definitively music

Watching you build is often creates mega envy. You have a disturbing amount of AWESOME TOOLS available for use! Serious industrial grade mojo! 😂

Awesome! I was surprised that the Hydro-Diesel did so well !

That was ridiculously interesting. Appreciate all the effort you made with this, especially in capturing the sound.

Listening to this at full volume is what tinnitus is like

Congrats on the views on this. This is phenomenal. I enjoyed the video but also glad to see this do so well.

That was FREAKING AWESOME MAN! I love this type of stuff man! Thank you for that brother!👍🏾😎

It's almost as if Jet A is designed to be run in jets...

One of the coolest experiments I've ever seen. Huge fan (no pin intended) of turbofan and jet engines since I heard one. Long time ago. Subscribed.

Your production is insane! Much respect bro!

That is so amazing and cool. Nice and simple jig to measure the thrust. Must be some very tight tolerances built into that tiny giant. Thanks very much for the video.

Very nice. the reaction of the engine to the different fuels was fascinating. The amount of flames and smoke after throttling down especially. As a driver of ultra-low-sulfur diesel vehicles I know that they have extra lubrication additives to counter the lack of sulfur.

Nothing beats the wonderful aroma of Jet-A.

This is something I thought I’d never see and it’s glorious

06:10 is just glorious to watch that engine roar

And you sir deserve to be on national TV every evening and morning episodes. Give us more!!

that was sicc! thanks for all your hard work and the upload, i shared

This is totally Badass . Great experiment

>engine spools up RU-vid: [Music] >engine spools down RU-vid: [Applause]

Just a quick tip related to your waterjet: To prevent erosion damage to the nozzle/orifice head, make a sacrificial hard rubber washer about 3/8" thick that tightly fits over the nozzle so that during pierce operations the high pressure splashback spray of water and garnet doesn't damage the machine over time. I used to work as a waterjet operator on Flow machines running 94ksi intensifier pumps in an industrial production setting, and without the washer there, the orifice head would be toast after a day or two of nested parts... Protect those expensive parts! :)

These lil engines are so friggin cool. Also some of the closed captions are hilarious while the engine is powering up or down.

THANK YOU VERY MUCH FROM FINLAND !!!

That is one impressive set-up and test ! Thanks for taking the time and effort to do this.

That dyno rig is 🔥

So cool. Can’t stop smilling

This guy is definitely a mad scientist whose work is awesome. Thank you. PS: Love the music too.

"IN THRUST WE TRUST!" :-) Great job on the video & the JET ENGINE THRUST stand. Thank you for sharing. I work on jet engines & aircraft as an A&P mechanic BTW.

I think the pump is just not calibrated to work with different fuels: temperature and RPMs are lower meaning the turbine is not at full capacity. I.e. needed more fuel.

Excellent video ! Very educational and entertaining !!

Awesome demo and data on the testing of a jet engine; thanks; really easy to understand.

Wow, I didn’t expect the Hydo to run so well. Great job mate👍

am I the only one that becomes extremely excited when listening to that turbine spark and spool up? I have no use for it but I want one for the soundtrack alone....

Yo this is absolutely amazing.

Nice enjoy watching that mate , what a beast of a jet motor, jeleous 🤙🤙🤙

This is what I call excellent professionals .... we should all be trained that way ...

Holy crap!! That was awesome 👍👍

Dude your videos have great production quality. Basass content, keep it up!

That water jet & jet engine......blow's me away!!! Keep up the videos!!!!

Great editing on the build video. I bet that took some time to do!

revisiting this video, what a great job you did, so much attention to detail on your channel its awesome. Subbed

Satisfying to watch, satisfying to hear

Sweet shot at 5:23! Awesome test overall and great dyno build. That hydrodiesel is weird indeed, crazy how much more power it had than the other two diesels.

When I was in the navy we ran turbines on DFM with emergency backups on JP5. Our diesel was run through fuel oil purifier and filtration. We saw a difference in power but not to the degree you saw. We also were running turbines the size of what's on a DC-10 so that probably had some affect. They were optimized for DFM.

Awesome man, pure brilliance!

Awesome job...much appreciated...Thank you!

Would like to see "offroad" diesel tested also. Its the red colored diesel with high sulfur content.

Just when you think it's reached maximum thrust... Jet Engine: Yeah right BYEEE!!!

Brother! I love the jets you build, and the related experiments you demonstrate, such as this one... for example, I also loved the 'see-through' jet project that you recorded on one of your other vids.! Thank you for the great vids you make and share with us! 😃👍

AWESOME! Great job!

Great Research Experiment. One Suggestion: "Add the quantity of fuel burned by fuel type to the summary chart." Enjoyed your video. Thank you. Mike

Damn! Never know till now that Jet engine is so versatile in terms of type of fuel and burning. It's quite independent. It's appears that it can run on almost any flammable liquid.

That might be the greatest thing I've ever seen

So insanely cool!

Love how powerful those water jet tables are. It blows the rust off in less than a sec.

Absolutely terrifying the first time you spooled up the jet. Made me think how completely vulnerable one is when flying such a Bizzare and technically complicated engine. Great content. New Sub for sure😉🤞🚬

This is exactly what i needed. As a senior student in Uni, this is my project topic, Alternative fuels especially Bio-fuels. thanks a bunch bro, this gave me an headstart....

Absolutely amazing!

Project farm is THE PERFECT CHOICE for testing these fuels

Very nice setup! Jet fuel is basically Kerosene. Jet fuel has less additives compared to the Diesel or the Hydrodiesel and I think that's why you would get higher RPM IE thrust. Also you higher EGT with the Jet fuel. The water cools the exhaust like water methanol injected into old turbo prop engines. I would like to see the specific gravity of the three and how that relates to thrust. Great video!

This channel is by far the coolest one i had ever seen..Im a fan now

that was pretty awesome

The fuels have different viscosities and shear strengths... You needed to monitor pressure and flow of the fuel at the motor input.. You should have also been monitoring the amp draw of the fuel pump... If you had used a load cell (from a electronic scale) you could have captured actual real time fuel flow, RPM and power output across the entire throttle range (a small data acquisition project for an Arduino or Pi). Oh, and it would have given you throttle response info..

16:40 Captions : "Music" Ah yes, human music of the human variety. My favorite.

This is so damn well done that any other comments would pale at this point. WOW is the operational word here!

Dude you are too handy. I wish I had your tool box! Great videos! Keep it up, very inspirational

The algorithm leads us upon a path of mystery and wonder!

The reason diesel produces less thrust is the higher Aromatics content of diesel versus Jet A. The content of Aromatics in Jet fuel ranges from 10% to >20% (by volume) while the diesel fuel contains 25% to 28% Aromatics (25% in USA an European Union). In fact most Jet A fuel has about 15% aromatics content. The "High Heating Value" (HHV) of Jet A is greater than diesel because of the lower Aromatics content and from the resulting better combustion efficiency. Jet A burns at a higher temperature than diesel (which increases turbine combustion efficiency and hence thrust) because the higher aromatics content in diesel fuel requires more (heat being absorbed) or BTUs to ignite and burn. This results in a turbine combustion diesel flame that is 30% longer than the Jet A flame due to the higher aromatics content of diesel fuel. The result of the longer flame (in the turbine combustor) is that the 30% of the heat energy of the diesel fuel is not converted to thrust because the diesel flame extends past the turbine nozzle into and past the hot turbine wheel. In addition the longer diesel flame results in high energy (i.e.high velocity) incompletely burned carbon particles being sand blasted onto the high temperature hot wheel metal with the result being turbine blade erosion (from combination of carbon or soot on the metal of the hot wheel and glowing carbon particles). To burn diesel effectively in a turbine engine designed for Jet A the flame length of the combustion can/chamber needs to be 30% longer to get full combustion to occur prior to the hot gases entering the turbine hot nozzle.

Great job. Thank you for your efforts. Interesting comparisons.

Thank you for the experiment.

You earned my sub from mentioning Project Farm. I love his reviews on a lot of things.