Engine Pressure Ratio

This video explains what Engine Pressure Ratio is and how it is measured.

[@saabviggen4069]

Great video, glad AgentJayZ sent me over.

[@RoddyMcNamee]

Very gratified to hear AgentJayZ sent you over.

[@martind.799]

Thanks, short and to the point. Exactly what I was looking for 👍

[@greyjens444]

Hey, thanks for making this i needed to see this very helpful video

[@danielbotes2161]

This was an excellent explanation, thank you very much!

[@rebeccaleon4473]

Great explanation!

[@P61guy61]

Thank you for posting

[@naturallyherb]

Very cool!

[@davidwallace5738]

Great explanation sir. Thank you.

[@huzaifarashid1]

Great video mate.. Regards from Agent JayZ

[@brabhamfreaman166]

AgentJayZ suggested your video for explanation of EPR - sure glad he did. Your models are crystal clear and diagram’s extremely elucidating. You’ve just gained a subscriber - speaking of which, you should have many multiples more for explaining something so complex in such clear terms so quickly and easily! Thanks so much, from a friend across the Irish Sea. 🫡 🙏 👊

[@RoddyMcNamee]

Thank you so much for the kind words.

[@Cherub1m7]

Thanks for this !

[@DreamlinerB777]

Very helpful!

[@micstonemic696stone]

AgentJayZ recommended your video on EPR, thanks for doing it explaining P 0, P 9 i think well made cheese fella

[@belavarga7734]

P9 is total pressure and it is almost the same as P8 (a bit less due to the pressure loss in the nozzle).

[@DystopicEdits]

What devices are used to measure these pressures? I'm thinking probes installed in the engine inlet?

[@Kargoneth]

Recommended by AgentJayZ on his "What is EPR and why is it used?" video. About to watch.

[@Kargoneth]

Was a good synopsis.

[@Kargoneth]

If I understood AgentJayZ's video correctly, then, given your diagram numbers, the EPR should be P8/P3 (maybe P8/P2), because both P1 and P9 should be close to ambient pressure and would not produce a useful EPR.

[@RoddyMcNamee]

@@Kargoneth if the exhaust nozzle is choked, P9 will be above atmospheric pressure and the “choked nozzle thrust” will be An x (P9 - P1), where An is the cross sectional area of the nozzle.

[@11Petrichor]

Thanks!

[@jeffmccloud6999]

Excellent video! Agent Jay Z gave you a real nice shoutout.

[@RoddyMcNamee]

Thanks Jeff. It's very gratifying to be mentioned by Agent Jay Z. I'm one of his subscribers and really admire what he does.

[@fviana7758]

Thx

[@peterkiddey6920]

Very clear explanation, but is it not usually P2 (compressor inlet Pressure) as opposed to P1?

[@raveena3232]

This engine has more stages so the names here are different but it’s is essentially the same as P5/P2 ie the ratio of LP Turbine exhaust Pressure to Engine Inlet Pressure.

[@fatihbengi1763]

Çok iyisin bro

[@gorkemozdemir357]

🙏

[@joeluongo2342]

Hi, can you disclose which tool you use to create these videos?

[@RoddyMcNamee]

Microsoft Powerpoint.

[@joeluongo2342]

Thank You@@RoddyMcNamee

[@zapfanzapfan]

AgentJayZ sent me.

[@simonwiltshire7089]

Found my way here from Agent Jay Z

[@belavarga7734]

I don't think it is precise. There are considerable problems with it.