Jet Engine Oil Pumps: Rebuilding and Testing AgentJayZ 2022-10-23 | Part of what happens at Jet City is the testing, repair and overhaul of oil and hydraulic pumps for jet engines and industrial gas generators.Today we have a couple of pumps used by an LM1500, which as you may already know by now, is the ground running version of the GE J79. If you enjoy this more detailed, long format video, you really should check out Patreon.com/AgentJayZ...
Engines Turning Both Ways AgentJayZ 2024-05-04 | Viewers have asked about "handed" engines. Are there jet engines that turn one way on one wing, and turn the other way on the other wing?It only makes sense, right?Common sense would dictate...Seems like the best way to do it...I don't see why they wouldn't do that...Well, let's have just a little think...Hey, look at this! One of my favorite channels, by a real airliner pilot, put out a video on this same subject... youtu.be/9l7XO42lmhw?si=Y7kl0VjwmqNWFQ71
Afterburning Sabre comment & a Big Opportunity AgentJayZ 2024-04-30 | Would it be possible to put an afterburner in a Sabre Jet?Also, this may be your big chance.Do not send you info to me.Watch the video, and follow the instructions...Direct your inquiries to the man doing the hiring. His name is Dane.Here is an informative discussion of exhaust nozzles. I found it accurate but dull.youtu.be/Nxw1HZj-b74?si=6KrfgOzYdIaONh5k
What is a Hush Kit? AgentJayZ 2024-04-27 | We take a look at old-school tech that was applied to airliner engines in the 50s, 60s, and 70s, until the march of technology made them unnecessary.They were weird, groovy, and vital to comply with the law.I wish I had one!Some copy/paste links...The video that sparked the question: youtube.com/watch?v=C0umWIPCPd4&t=965s at 15:58 aircrew is inspecting the exhaust mixer.My video called Turbojet or Turbofan: youtu.be/AtqXfzHz_b8?si=1zdJZ0PxWq-WIbOAA video about the new "ejector" hush kit for the RR Spey engines in a Gulfstream:youtu.be/LyiMg6SaYsE?si=KugJpkdVlhVFcgY7A great shot of an old Air New Zealand 737 with ejector hush kits ( with thrust reversers ) on it's JT8D engines... https://fb.watch/rKqVt87BhA/
Oil Pump: Replace or Overhaul? AgentJayZ 2024-04-18 | A viewer asked why aren't the oil pumps in turbine engines just routinely replaced after a specified interval of running. For a variety of reasons, things in the aviation world are a bit different from the way cars are maintained.Links:The video which sparked the question...Oil Pump Rebuilding and Testing : youtu.be/moQC6J2SaBoJet Engine Lube Pump Overhaul: youtu.be/AxqB9D0mX5UJet Engine Lube System: youtu.be/WAia8PwMvQM
Many Ways to Start a Turbine Engine AgentJayZ 2024-04-06 | Let's try to describe all the different ways used to start a gas turbine engine. We're including fighter jets, airliners, helicopters and industrial ground running engines.I will include video examples of as many that I can, and here are some links to other vids:The Blackbird start cart: thesr71blackbird.com/Aircraft/EnginesRR Avons in a Canberra: cartridge fed turbine starter:youtu.be/v4w85CeWOus?si=HAj_6NprIxs0EknZThe F-22 startup, featuring a cartridge start of a small starter engine. The video has been edited to cut out the windup of the main engine. I don't know why they did that.youtu.be/U9l_NnvsB-g?si=QJA7_aXLtX2zH8-OMy video on the air turbine starter with a radial inflow turbine: youtu.be/G28OlUqpUfE?si=YFIqBNnyFK9jxQXZMy video about air turbine starters with axial flow turbinesyoutu.be/NOdeSOHpXYA?si=KDVXGXYiHXtPEPZVMy video about the our start cart containing a Garrett GTC 85:youtu.be/4seex64vGlE?si=fhn3PbTJpaQH7YU0bonus: youtu.be/KHJYMWBEKyo?si=euIKspc_KU4w1sTe
PT6 model kit update AgentJayZ 2024-03-16 | Due to frustration with assembly, instructions, description, and accuracy of representation, this series of videos is at an end. I did not finish this model kit, but I want to help the manufacturer with a few small improvements, which will really bring out the potential of this kit.My suggestions are:1- better identification of each part2- using accurate names for those parts3- clearer and more detailed instructions for assembly4- a more meaningful and educational description of what the PT6 is, and how it is used.As promised, the best re-write of the description of the PT6 will be contacted by me for an address to send the complete kit, free of any charges.I will review the submissions, which must be original and not a copy from another source... and I will be the sole judge for this contest.send your 1 page or less description to joljbc@yahoo.comThe kit is produced by Skymechman, and sold by EngineDIYThe supplied instructions and the description are both here:docs.google.com/document/d/1jNvol3vRwHSd5y0MOMgg9epYzAE8KojX/edit?ref=8w3whxyg#heading=h.gjdgxsThe model kit supplier is here: enginediy.com/en-ca/collections/skymech/products/pta6-turboprop-engine-model-kit-build-your-own-turboprop-engine-that-works-3d-printing-diy-aircraft-100pcs
Boost Pumps AgentJayZ 2024-02-11 | You can think of this video as an appendix to Blancolirio's reporting on the crash of Hop-A-Jet Challenger 604.I try to explain the differences between fuel pumps, transfer pumps, and boost pumps.Feel free to post what you think I mean by "that one thing".Also: what's wrong with this picture?
PT6 model: Shaft Assembly AgentJayZ 2024-02-08 | Putting things together is not as straightforward as with the scale model kits I made when I was a kid. This is both a puzzle and an opportunity.Sent to Jet City Turbine Services, Inc. for review, is a scale model cutaway for display of a Pratt & Whitney Canada PT6 turboprop engine.Produced by Skymechman, and sold by EngineDIYHere is the link to the kit:enginediy.com/en-ca/collections/skymech/products/pta6-turboprop-engine-model-kit-build-your-own-turboprop-engine-that-works-3d-printing-diy-aircraft-100pcsHere are the assembly instructions:docs.google.com/document/d/1jNvol3vRwHSd5y0MOMgg9epYzAE8KojX/edit?ref=8w3whxyg#heading=h.gjdgxs
Turbine Blade Cooling Air Pathways AgentJayZ 2024-01-28 | I got a great question this morning about the different types of cooling air passages in turbine blades, so here is my response.This is the video that the question is about: youtu.be/7upnkrhqRWQAlso: youtu.be/TzwMumR3I30For more, go to my channel page and put cooling air in the search feature.
2 Questions about Sound AgentJayZ 2024-01-17 | Today, on the same day... I got two questions that both turned out to be largely about sound.I must confess that I am a sound addict, and I have been self-diagnosed with a fairly serious loudspeaker fetish. Hey, the shop has a 6 speaker transmission line system, supported by a 950W subwoofer.
Unexpected surprise gift? AgentJayZ 2024-01-16 | Sent to Jet City Turbine Services, Inc. for review, is a scale model cutaway for display of a Pratt & Whitney Canada PT6 turboprop engine.Produced by Skymechman, and sold by EngineDIYHere is the link to the kit:enginediy.com/en-ca/collections/skymech/products/pta6-turboprop-engine-model-kit-build-your-own-turboprop-engine-that-works-3d-printing-diy-aircraft-100pcsHere are the assembly instructions:docs.google.com/document/d/1jNvol3vRwHSd5y0MOMgg9epYzAE8KojX/edit?ref=8w3whxyg#heading=h.gjdgxs
Why not Gaseous Fuels for Aircraft ? AgentJayZ 2024-01-13 | Some thoughts about why aircraft don't use gaseous fuels, even though almost all industrial aeroderivative gas turbines run on natural gas.It's a simple answer, with, as always, complications.Comments are always welcome.
Details are Important... AgentJayZ 2024-01-07 | A little story about how bad things can happen through a chain of tiny things that aren't quite right.This event is part of my philosophy and motivation to always do my best work.Here is the NTSB report: ntsb.gov/investigations/AccidentReports/Reports/AAR9706.pdfA good prequel to this vid is here: youtu.be/RyZRzdt4ZngAnd have a look at this: After the door plug blew out of the Alaska Airlines 737 Max 9, the FAA put out an emergency airworthiness directive, requiring inspection of the mounting hardware for the door plugs on all 737 Max 9s. United found this on several of its aircraft. The screws pictured here mount the door plug lower hinges to the airframe. twitter.com/ByERussell/status/1744460136855294106/photo/1Wow, those are in the process of departing their service position.This will be an easy fix, and lives will be saved.More details: theaircurrent.com/feed/dispatches/united-finds-loose-bolts-on-plug-doors-during-737-max-9-inspections
Results of an Unloaded Power Turbine AgentJayZ 2023-12-22 | Let's have a what if session about power turbines becoming unexpectedly disconnected from their load while running.Here's the link to the video I mention which features a look at an LM1600 PTyoutu.be/tEnKfJ5A65oI have a playlist all about power turbines that you may enjoy: " Power Turbines and what they do... "
A Learning Opportunity AgentJayZ 2023-12-08 | When we see an engine with damage, we can try to understand what happened, and also think of the many possible causes that would lead to the damage. If any of those causes are associated with tasks we perform in our job.... we can be inspired to be better at our job.People are depending on us.
F-35B Lift Fan Drive Question AgentJayZ 2023-11-15 | I've been answering questions about jet engines since 2007, and this is one of the best ever. Let's squeeze our minds into goo over this one!If you work on or with the F-135 engine, maybe you can share a bit of info.If you are not in the know, but think you might have an idea... post at your own risk.The basic question is "where does the power go?", when the lift fan is disengaged.If you ignore that point, well...
Jet vs Snow 2023, with Reheat AgentJayZ 2023-11-09 | A J79 turbojet engine out of a fighter is tested to the limit, and we happened to get a bunch of snow during the test.This is an aircraft engine, which we have overhauled for the owner/operator.
Axial Compressor Designs AgentJayZ 2023-11-04 | Let's look at some compressor designs used in gas turbine engines, in response to a question about why the disks don't seem to touch the center shaft in some diagrams. A very interesting question, showing that the person asking has looked into the subject, and done a bit of thinking...
Turbine Cooling Air in a Jet Engine AgentJayZ 2023-10-22 | The mysterious source and pathways for turbine cooling air in a turbojet engine. The Canadair Sabre 6 was built in Canada under license from North American Aviation. It was a slightly modified design of the F-86F, and it used a Canadian designed and produced engine: the Orenda 14 turbojet.While restoring one, I had all the pieces in place to show how turbine cooling air gets where it is needed.Other videos about cooling air, by title. Copy into the search box on my channel page...Working on a Turbojet: 3 -Turbine Cooling AirAir-Cooled Blades - Turbine Engines: A Closer LookCooling Air 3 - Rear BearingCombustor Liners - Turbine Engines: A Closer LookHeat, upon HEAT. Why turbine temp is so important.Cool Your Jets
How Long Do Jet Engines Last ? AgentJayZ 2023-10-10 | A great question about the service life of aircraft and industrial turbine engines.As usual, the answer is not simple. It depends on a lot of things...Here is a video featuring Paul Keppler in his Orenda powered Sabre Jet.I've worked on his engine, and I can tell you it's in great shape." F-86 Sabre Aerobatics - No Music! - Airshow London 2018 "
Afterburner Liner Shapes AgentJayZ 2023-10-07 | An interesting question about the bumps in an afterburner. The question was asked about this video called "Jet Nozzle Test". youtu.be/x5ccK94IvsAI wasn't sure what exactly was meant, so I took a guess.The thumbnail for this vid is the flame holder in the afterburner section of our Orenda Iroquois. Yes it is.
Inflight Restart without starter power ? AgentJayZ 2023-09-23 | Of the four unrelated things talked about, the last is an unlikely scenario...How would you restart an engine in flight if you had no power to the starter?Well... let's think about that for a minute.
Can Wind Damage the Engines of a Parked Airliner? AgentJayZ 2023-09-10 | Sometimes, on a windy day, you might see an airliner that is parked and shut down, and the engines might be turning like windmills.Is it bad for the engines to be turning like that?
How can I do that ? AgentJayZ 2023-08-27 | Recently I have had quite a few viewers ask how they can get to work on jet engines, or how they can obtain one...This a popular question.Here are some other response videos I've made:youtu.be/b9DYsyhi7bQ Another Way To Get Thereyoutu.be/C8J8roji0xo So You Want To Work On Jets...youtu.be/Z4yfkQnFr6U Design and Build a Jet Engine yourselfyoutu.be/EprYbbRpcNo Restoring Your Own Jet Engine
PT6 failure in Mike Pateys Turbulence 2023 AgentJayZ 2023-08-12 | Here are my thoughts after watching Mike Patey's video about his engine failure in his highly modified aircraft called Turbulence.Here are the links to several of my videos dealing with subjects mentioned in this video.Turbojet Start Sequence: youtu.be/vTHSXcvCFlMHot Start: youtu.be/axR5kiZWaYcCool Your Jets: youtu.be/O49EwwUaSskTo see a broken blade, have a look at Removing Blades J47 Turbojet here: youtu.be/kzWBBiKqyyATurbine Engine Heat Damage: youtu.be/KqgZpy8rsvE
Sabre Jet engine back after 10 years AgentJayZ 2023-07-02 | An Orenda 14 turbojet that was the first engine I ever ran in our test cell was sent to us for a fuel system overhaul. All components of the fuel system were rebuilt to new condition or they were replaced with new parts. The hot section was also inspected for wear or damage. None was found.This is the acceptance run in June 2023.This is the same engine as featured in my August 2013 video "Sabre Jet Engine first start"the link to it is here: youtu.be/wRH0eDrNjSY
Turbojet Ignition Test and Run AgentJayZ 2023-06-07 | We've got two turbojet engines in the shop. Orenda 14s, which power the Sabre Jet (F-86F in USA and Sabre 6 in Canada) to just below Mach 1 in level flight.One is in for a fuel system overhaul, and the other is being restored from the ground up.Every component and system is checked, and today it's the ignition system.The Orenda is also used as an industrial gas generator, where it drives a power turbine to produce about 9 thousand Hp. The test run shown here is of an industrial Orenda, used to make power for an offshore oil platform in another part of the world.Everything went well. Tourbillon Turbines has a 100% reliability record. They have never had any failures in service.
Jet Engine Flameout and Relight AgentJayZ 2023-05-29 | Phil asked me to do a video about flameout causes and recovery action options. This is my best answer as someone who builds jet engines and runs them in our test cell.I don't have access to airliners or their operating instructions, so I really encourage pilots and others familiar with engine operations in airliners to tell their stories here!The first start video of #2920 is here: youtu.be/wRH0eDrNjSYThe comparison vid between a Sabre cockpit and our test cell is here: youtu.be/JKXr68QPzZU
Jet Engine Ignition & Starting: Interconnectors AgentJayZ 2023-05-05 | A question was asked in a way that made me realize I have never discussed a little used but vital component of all of the older turbojet engines.Interconnectors are part of the design in can-type combustion sections, and in can-annular, so almost all jet engines up until about 1970 or so. There are some notable exceptions, and I want you to mention them in the comments.The engine could not run without these, but they are only functional during startup. While running, they do nothing.
Cautionary Tales from the Jet Shop AgentJayZ 2023-04-30 | Episode #1 Sent in by Scott in Illinois: At an air force base for the B-58 bomber, we have the story from 1964 of how one young aircraft maintainer, by being incompetent and complacent, created a J79 fuel nozzle mismatch disaster. And risked a nuclear disaster... no kidding.This one is an actual Disaster, instead of the much preferred Near Miss.we can all learn from this, eh?If you have had an experience with either a close call or a disaster, please share it!
Afterburner Monday AgentJayZ 2023-03-14 | On a dreary Monday, when it's snowing, what could be better than some raging reheat?Plus bonus comment.A few people have mentioned that the flame holder looks like it gets in the way of gas flow.Remember the gas velocity is not so great there. In the jet pipe, there is some pressure and some speed. As the gas exits the pipe, the accelerating nozzle converts the pressure to a huge increase in speed, and that acceleration of the exhaust is how thrust is made. Since it is located well upstream of the accelerating nozzle, the losses caused by the flame holder are minimal.Editor's update: I have tried the Feather brand blades, and they are a big improvement.They are more confidence inspiring, because they seem to work so much better.Thanks for the recommendations!
The Story of My Viral Video AgentJayZ 2023-03-10 | I made a video back in the day that has become meme-worthy and unstoppable.It's called Dropped into a Turbine Engine, and this is the story of how it came to be.If you want to hear an experimental dubstep composition using the sounds from "Dropped", check out "Ghost Turbine" by Skenik on YouTube: youtu.be/sF4oupAOpwQ?si=0iTxeF3isyS6H9rjTurbinophone page here: http://www.turbinophone.comTickling the Teeth of the Dragon: youtu.be/vMeA6Naot8wThe full tour of the J79 cutaway: youtu.be/Or6mIaSWZ8g
737 Dual Engine Failure Follow up AgentJayZ 2023-03-05 | After reading the Wiki report on Transair Flight 810 , and the comments generated by my first video I posted yesterday, I have some further comments to make on this incident.the report I'm referring to is here: en.m.wikipedia.org/wiki/Transair_Flight_810
737 Dual Engine Failure ? Questions AgentJayZ 2023-03-04 | Let's answer some questions in a comment I received over a year ago.Why did it take so long? I asked that first.
the Turbojet Start Sequence AgentJayZ 2023-02-20 | Explained in detail the series of events that take place during the start of a turbojet engine from fully stopped to working in the flight regime. In our test cell, we have full manual control over the engine, so all these steps must be completed in the right order, and within narrow time windows to ensure a good start, and to avoid any damage to the engine.This is a project completed in Summer of 2021 that was never used.It's also a good follow up to my video called How to Start a Jet Engine.
Olympus Turbojet in the test cell AgentJayZ 2023-02-12 | This Rolls Royce Olympus is a ship engine, and makes a little over 27 thousand Hp. My other Olympus videos are of natural gas fired engines, used for generating electricity.This one is liquid fueled, running on JetA1.The total running time over these days was a little over one hour, with quite a bit of idling, and maybe 3 or 4 minutes of max power.Our fuel consumption was a bit under 500 imperial gallons.If you notice, there is no smoke in the exhaust at all.This vid is the latest addition to my playlist called The Mighty Olympus. It's on my channel page, or you can use this link address: youtube.com/playlist?list=PLE5I9ZZNPu1OsE9RZALWujQO54z77n3sd
Axial Compressors : Why so many stages? AgentJayZ 2023-01-15 | The working title was "Compressors 2"Watch the original "Compressors" here: youtu.be/CXSi4GXUojoAlso, the compressor stall video is here: youtu.be/yaFeO6Jze64and the follow up Q&A video is here: youtu.be/xzdpkIibwBM
Safety Cable instead of Lockwire AgentJayZ 2022-11-13 | After more than a decade, this is a follow up video to my Lockwire video. A bit more detailed instructions on how to use the Safety Cable system to replace lockwire, saving much time in the process.A lot of viewers are thinking this system has a weak spot at the crimped-on ferrule.The ferrule is not the weak spot. The wire needs to be tight enough to avoid vibrating and wear, but it does not hold the torque of the bolt. The wire is there to keep the bolt from winding out and becoming a loose piece of debris that could cause a lot of damage.The wire is not strong enough to apply the proper torque to the bolt. That's not what it's for.Every time a safety cable is removed for disassembly, the cable breaks. Even if the ferrule itself is gripped by the pliers and force is applied, the cable breaks, but the ferrule never comes off. I've never seen it happen.Following a suggestion made by many viewers, I went to the DMC site, and watched the vid on their version of this tool. Seems like a quality unit. I don't think I would use the wire tensioning handle, because of the 90 degree corner the cable is pulled through.I'd have to try it though.Interesting for a safety wire manufacturer, the comparison they make to using standard lock wire is a joke. They include three gigantic mistakes:1- Using lineman's pliers instead of lockwire pliers.2- The wire is incorrectly twisted from the starting bolt, in a way that would allow the wire to slip over the bolt head.3- The pliers are placed where they will leave a mark, or nick in the wire as it enters the second bolt.
Schools and Tools AgentJayZ 2022-11-12 | Another friendly tech school that uses my vids sent a nice gift, and We review my most used tools when I am building jet engines.
What is EPR and why is it used? AgentJayZ 2022-11-06 | Engine Pressure Ratio is an important indication for pilots, but it's not used by engine builders and testers like me.Let's talk about why that is, OK?Here is the link to the the video mentioned here: youtu.be/lpdPiBQ-H3M
Jet Engine Run: Right Behind It AgentJayZ 2022-11-05 | After some questions about sound recording from great distances, I used an afterburning J79 test to try out a few things.I hope you enjoy.To get right up close, try looking at my other videos featuring this afterburning turbojet monster of an engine.
J79 Turbojet Engine: Just the Jet AgentJayZ 2022-10-02 | The video preceding this one was all talking about reducing the noise made by jet engines near airports.This video is not about that. Probably as opposite as can be.For your enjoyment, we made as much noise as possible, using multiple afterburner pulls, and burning prodigious amounts of JetA.The Jet fuel hoax crowd are idiots; every moronic one of them.This is a J79-19, normally installed in a supersonic aircraft used to train military pilots in a dissimilar adversary environment... yes, exactly like Top Gun. Other models, such as the J79-15, were used in the F-4 Phantom 2.The -11 was used in the early F-104 Starfighters.It was sent to us for overhaul and made new again by the boys at S&S Turbines: Clayton, Justin, and Walter. The operator is Electron Bill.The engine burns:5 gal per minute of fuel at idle. 5000 rpm.35-40 gpm at full dry power. 7685 rpm. Nominally 11,500 lbs of static thrust85-90 gpm in full afterburner. 7685 rpm. Nominally 18,300 lbs of static thrustEach engine's actual number vary, depending on many factors...The engine uses 155 lbs of air per second at both of those max settings.The extra 50 gpm in AB is used to "reheat" the exhaust of the basic engine, making it hotter, and expanding more, so it leaves the engine much faster.This day, we were running for about 30 minutes, with a lot of idling, which I cut out. We burned through 1,800 Litres of JetA. Good thing we bought 4,000L from the airport, which they delivered to our tank.According to our instrumentation guy, the thrust was about half what I expected, because only one of the two (left and right) load cells on the engine mounts was connected.The AB does not sound louder in the vid, but it is in real life. The mic is a lapel unit, inside a high density foam shield, and the shield is placed inside a Pelican case, on the ground, about 70 yards back and to the side. You can see the position of the tripod, showing why it is not blown away: it's not in the jet stream. In that setup, the mic is completely overwhelmed at or even before max dry power.I try to explain how dangerously loud the noise is in my video "Testing a J79 with Afterburner"Please let me know if you like this non-talking video.
Airliners Cutting Power Right After Takeoff? AgentJayZ 2022-09-11 | This morning I got a great question from Felipe about the apparent power reduction almost immediately after takeoff by many airliners.A few links:Blancolirio is a 777 captain with a great YT channelMentour Pilot is another airliner pilot with a great channelAnd check out the Wikipedia page for Aircraft noise pollution,as well as the page for the JT8D engine.This video is generating a lot of comments that are either totally clueless, or are simply restating the completely obvious. Such comments will be discarded at my leisure.
Starting your Starfighter! AgentJayZ 2022-09-02 | Answering a question about how exactly a Starfighter engine gets going.For further info, check out these vids:Testing a Starfighter Engine youtu.be/Bxkt2vx9EOQAlso, you might like this one: Starfighter Engine Run youtu.be/8dpmlu4Gd0U
My Oshkosh 2022 : In-video contest winner AgentJayZ 2022-08-15 | A little discussion about the contest, and why the winner won.
My Oshkosh 2022 AgentJayZ 2022-08-12 | It's only been a couple days since I finished my epic ride over the North American continent. Oshkosh Wisconsin was where I stayed for 7 days during Airventure 2022. I was planning to live the experience, instead of trying to document it on video, but I had my phone, and managed to get a few good shots.If you've read this far, there's a secret contest: the first person who tells me what is very unusual about something shown in this video (the thing I'm thinking about), will win an award, yet to be decided.Update: The contest ended on Aug 12. I am very impressed with Open Mind, for noticing the N2 and N1 were reading opposite to what I expected in the startup sequence in the L-39.
July 2022 RR Tyne Ship Engine Full Power Run AgentJayZ 2022-07-16 | A proving run of a RR Tyne engine, overhauled at Tourbillon Turbines, and used in a Navy frigate as the 5000 Hp cruise powerplant. Some explanation of the configuration of our test cell, which we use to safely load this beast of an engine.Check out the Power Turbine video referenced here: youtu.be/tEnKfJ5A65oAlso: youtu.be/wIxHp_FazQQThe Wiki page for the RR Tyne: en.wikipedia.org/wiki/Rolls-Royce_TyneThis engine is a Tyne RM-1CA video about our Air Dyno: youtu.be/yY73rm7FZhMAnd if you are wondering about my mangled finger, I messed up a jump on my MTB, was going about 35 Km/hr, the front started dropping, then I hit a tree with my shoulder, and after flying about 15m while pitching and yawing, I landed on my head and punched the planet with my left hand. I was wearing those cycling gloves, which didn't cover the impact zone. Tore off some skin, helmet saved my noggin, and no real damage to me or the bike. Yay!
Mini Jetboat Update July 3 2022 AgentJayZ 2022-07-04 | A few people have been asking how this project is coming along, so I want to show you all where we are.
A See Through RC Jet Engine AgentJayZ 2022-07-03 | More than a few Jet City viewers have asked me about a certain video showing a clear combustor outer case on an RC jet engine.I've watched a few videos on the subject, and here are my thoughts.
