Add to EJ Playlist It's been a while, but here we go with the testing of the AI-25TL turbofan engine from the L-39 Albatross single-seat jet aircraft.
I watched these aircraft run the course at 505 mph at the 2014 Reno Air Races.
Add to EJ Playlist 1) - Stators and what they do in compressors and turbines.
2) - Fuel nozzle plugged ?
3) - Increasing low-throttle fuel efficiency?
4) - The GE CJ805-23 aft fan engine.
5) - low compression, low temp engines?
Add to EJ Playlist We did three runs over two days of this afterburning turbojet. We were trying to isolate and correct a transitory variation in thrust at high cruise.
We varied the power from about 60% to medium afterburner in order to fully bracket the suspected transitory range.
This is an aircraft engine, and we are testing is because that is what we do. S&S Turbines is a company that services industrial and exeprimental aviation gas turbine engines.
This 8 minute video was edited from about three hours of footage taken of all three test runs.
The cameras and I all took some hits from flying debris, but there were no injuries!
Add to EJ Playlist 1) - pressure changes in the engine
2) - surprises found during repairs
3) - exhaust velocity vs airspeed
4) - APU compared to jet engine
5) - power characteristics of various engines
Add to EJ Playlist 1) - The flame inside the combustor
2) - Where is our starting equipment from?
3) - How a turbofan handles rain or hail
4) - A request to show everything and what it does
5) - How to predict if a jet engine will start
6) - Starting airliner engines with APU power or engine bleed air
Bonus: Jet Porn, Do it baby, do it again...
Add to EJ Playlist 1) - Different fuel nozzles for different fuels
2) - Signals used during our test runs
3) - Industrial Olympus vs. Concorde engine
4) - When to turn ignition off
5) - What do my coworkers think of me filming tests?
6) - FOD ingestion and it's effects
7) - Red lines painted on the side of planes / nacelles. Why?
Add to EJ Playlist 1) - Why does the afterburner nozzle change shape?
2) - Keeping blades from falling out while balancing turbine rotors
3) - How do VSVs and bleed valves do the same job?
4) - Do the rotor blades and stator vanes ever match up?
Also: it's Gerhard Neumann, not von Neumann... sorry about that !
Add to EJ Playlist 1) - Can our engines blow up?
2) - The shape of the turbine section
3) - Cleaning deposits from compressors
4) - Cooling down process for turbine engines
5) - Interaction of rotor blades and stator vanes
Add to EJ Playlist A fine summer day, and a giant turbojet engine ripping a hole in the atmosphere. Things went as expected, and this is one more Olympus that's ready to head back to work.
Thanks to the Maddex Turbine Services crew: Brian at the controls, Mike on starter duty in the Cat, Donovan on fuel connection and close - in engine support, the new guys, Dan and Constantine on firewatch, and of course, Byron Westgate on fuel supply management.
Add to EJ Playlist 1) - Tail hooks on Canadian CF-18s
2) - Do we test engines at simulated high altitude
3) - FOD screens on the J47
Bonus : struts
4) - The path of turbine blade cooling air
5) - Jet engine shutdown procedure
6) - What tools do we use in our shop
Add to EJ Playlist Balancing and building up the power turbine used with an LM1500.
Plus a whiteboard talk explaining how power turbines are installed and used with large industrial gas turbine engines.
Add to EJ Playlist 1) - F-4s come with RR Speys or GE J79 engines...why?
2) - Oils and fuels used in jet engines
3) - Explaining the numbers on our control room screen
4) - In flight engine starting vs normal ground starts
Add to EJ Playlist 1) - Why is the power turbine even needed ?
2) - Close-fitting parts and why they don't crash together.
3) - What the inlet bellmouth does.
4) - Labyrinth seals.
5) - A comment on shop screwups by someone who's been there.
Add to EJ Playlist 1) - I answer some questions about the design of the racing riverboats
2) - We discuss an ongoing issue that a lot of viewers have difficulty understanding about my J79 afterburner videos.
3) - We talk about the VSV system, and how it is essential to the starting of modern engines.
4 ) - A bonus review of how a nozzle is a critical component...
Add to EJ Playlist This is the second J-47 we've had in our test cell, and this one behaves in a slightly more civilized manner.
Robin at the controls, Red is the customer rep, Electron Bill on the the starting system, AgentJayZ watching for oil leaks etc.
Add to EJ Playlist Here we read directly from the holy scriptures of GE.
I passage known as "Basic Engine Operation"
It's the way GE describes how The LM500 works.
An excellent description of the functioning of a jet engine.