The Lockheed F-104 Starfighter Howl Explained | General Electric J-79 Nozzle

[gig651]

I love it! Thanks!

[fillopygeesi]

Cool... Do you think this could work with an rc EDF jet without loosing thrust? would be cool to make one for rc jet for scale sound

[Helicopterpilot16]

@fillopygeesi I do, but I'm not too sure about thrust loss. I would love to find out becasue its what I really want to try! 

[n7275]

Cool!

[VIR092]

That was an excellent explanation!

[SgtRum]

Good Vid! I know its been awhile, but you could put the blower in another room and tape a vacuum hose to it, then just have an electrical plug in the room you are in and bring the free end of the vacuum hose and plug in the room you are filming in to do the experiment again. Then we would hear better the howl of the beast!

[Helicopterpilot16]

@SgtRum It may take me a bit, but I think I have a better setup than the blower I used before. I have a hairdryer motor (Ducted Fan) connected to a model train transformer. Therefore it is adjustable to a point. Its allot quieter than the blower. But I sure will do so. Thanks for watching! I will message you once it has been uploaded.

[MrGtirob01]

Great explanation on this! And the whole time I thought it had something to do with the intake side of the engine. So thanks for clearing that up for me! Learn something new everyday!

And a very good demonstration using the fan, it really did sound like a J-79 with the second nozzle you made.

[Helicopterpilot16]

@MrGtirob01 Thanks! your as Surprised as I was!

[justforever96]

Pretty cool! I'm surprised that the fact that the inner flow isn't faster doesn't make a difference...I mean, obviously the venturi speeds it up a bit, but not to anything like the jet velocity of a J-79. I'm pretty sure you're right that the out air flow is mostly for cooling, but it may add some thrust as well...you get cooler, denser air from the outside mixed with the hot exhaust, which would heat it up and cause a bit of expansion. Probably not much, but some.

[Jhorak101]

The F-22 raptor Engine the Pratt 119 howles too Almost the same way.

[russnnini]

Very cool demo! The 104 is one of my favorite aircraft and I've always wondered what gave it that distinctive sound.

[Helicopterpilot16]

@russnnini Thanks for viewing! I always wanted to recreate this sound and decided to find out my self! this is what I got.

Cheers!

[AgentJayZ]

That;s pretty cool. It even sounds just likea J79 when the fan is powered off and running down.

But, dude, you need a camera operator so you can demonstrate without trying to hold the camera.

We've got a 95% built up J79 in the shop right now, and we'll be testing it in the near future. ( weeks - months? not sure yet) You should come see it run.How far are you from Fort St John?

[Helicopterpilot16]

@AgentJayZ I live about 1,500 miles away or 2,413km, I've seen all of you videos and really have learned allot from them, to see a J79 run would be my dream!

[znuto]

The early J79-15s had a shorter nozzle, this was used on early F-4s and F-104s. The howl was precisely between 82-85%. When in Korea I was on the later F-4 (E) with the J79-17. More power, longer nozzle and no howl. During ground engine runs it was forbidden to stay in the 82-85% area due to the noise, especially when we would run them at night. Our squadron's F-4s would not howl.

Interestingly enough, modern engines would howl, but have a "screech ring" installed to eliminate howling.

[Helicopterpilot16]

@znuto I understand totaly! Thanks for all the info,Muh Appreciated.

[LastBornProductions]

This was a great scale reproduction! Congratulations! I believe this could be used for audio sampling for movies or video games!

[Helicopterpilot16]

@LastBornProductions Cool! I was really thinking on doing this to a RC F-104. These are just paper, now that I know how to design it, I should try and make it from better materials.

Thanks for the comment.

[Howad83]

How cool is that! nice video!

[sanfranciscobay]

You've identified where and why the howl comes from. So when is the plane in 80% throttle, how frequently, at what point in flight, speed, altitude...?

Did you know your experiment would work prior to building it?

I know it's a long shot, but is there any chance you can get next to an F104 at 80% throttle and then explain it with a video camera and a pointer?

[Helicopterpilot16]

@sanfranciscobay I'd say the times you would hear it is During taxi acceleration, and crusing flight below 15,000 feet, and during landing. and speed is not a factor it all depends on the pilot throttle use.

I had a feeling it would work because I already knew where the howl came from.

And the last questions answer, An F-104 no but a J-79 from an F-104 yes.

I'd just need to get very special permission to work on a museums old J-79 because the nozzle's are wide open. But its a maybe.

[cdnhornet]

@Helicopterpilot16 We(the ground crew) called it the 82% howl. FYI the pilots would also use this howl to get our attention. For instance to start marshelling them to taxi, after they spent a couple of minutes inputting thier Waypoints into the inertial nav. systems. The "howl" was also most distictive during the turn to base [in the circuit]. The F4 Phantom has 2 J79's and has a similar howl but not as distictive as the 104 Starfighter.

CF. ground crew CFB Baden West Germany '82-'87

[zeroviper42]

very nice.........! Awesome!

[Helicopterpilot16]

@zeroviper42 Haha Thanks!