F-14 engine nozzles open and closed ?

Here's everything you need to know:

http://www.anft.net/f-14/f14-detail-engine.htm

Regards,

-Drew

Interesting, apparently modeling an F-14 at rest with both nozzles in the same state would be inaccurate.

QUOTE: Originally posted by claymore68 Interesting, apparently modeling an F-14 at rest with both nozzles in the same state would be inaccurate.

Nope! The explanation on that page only describes the nozzle configuration after a normal (usually postflight) shutdown of both engines. But the relevant systems can be manipulated manually on the ground during the course of maintenance and/or testing, resulting in different nozzle configurations. You'll see Tomcats with one open & one closed, both open and both closed.


Fade to Black...

D'oh! Of course! I musta' had a heaping bowl of Dumb-a** for breakfast.

LMAO

Hey, how is that Dumb-a** cereal, any good? Don't feel bad, every once in a while I'll have some OTTO for breakfast myself.


Fade to Black...

Not too bad with blueberries.

It is also high in fiber. Good for your system.

Based on that article and many in service photos aboard carriers, It appears that it would be more accurate to model the nozzles open and closed.

If your modeling a tomcat undergoing maintenance I don't think it's as important. But if it's set in a normal day to day situation it would be more correct to have them open and closed.

As for maintenance that may affect nozzle position, most likely it would include post maintenance engine runs, rigging and trim. One would have to believe that normal engine shut down procedures would be followed.

Claymore68 may not be far off the mark

Just my opinion

Darren

Guys, I kinda noticed that open and closed thingy on some FA-18s too.

As a former military pilot I can say that a Jet a/c will taxi under direct mil. power. This is a state where exhaust nozzle is the same diameter as the turbine. This reduces the amount of push from the engines and prevents the 'turkey feathers' from overheating. These are directly controled from the cockpit by the pilot. If you notice some in-flight photos of a/c not in afterburner you will see these 'closed'. In that state they give more thrust without using afterburner. They open for AB so they don't overheat. When you see them with one 'open' and one 'closed' at an airshow, the pilot does that for show only and will open both prior to starting the engines. As said above there are some instances where the engine tech. has 'closed' them for maintanence and did not reset the nozel.

Thank You Drew
for that very interesting link !
kind regards
EE

QUOTE: Originally posted by Lufbery Here's everything you need to know: http://www.anft.net/f-14/f14-detail-engine.htm Regards, -Drew

the reason is that the Turbofan/Turbojet engines with augmentors(afterburners) the verible nozzles are to maintain internal pressures of the engine, usually when the engine starts the nozzle will close then open up, and when the throttles are advanced they will close and when they go over the hump to augment(afterburn) they will open back up, and some pix that you see are that the pilots are starting a engine and the turkey feathers are closed or the engine above the ground idle setting, if you ever have a chance to go to an Airshow watch the augmentors of the fighters(or the B-1) upon starting you'll get first hand scene on what is really going on with the engines

So what's the verdict? Is it accurate to model the F 14 with both open or closed? The one open and one closed things looks pretty awkward to me...

Go with one open and one closed. When someone ask you why they are like that, you will have an interesting story to tell them. They will be astonished by your knowledge of the aircraft.