Screaming Aircraft

[Peebs]

Ok, so now I'm back in the saddle,

I attended the recent RAAF bi annual air show at RAAF Williams, Point Cook, and was again taken by the 'Scream' of our own little CAC Boomerang.

I've had a bit of a hunt on youtube and found this little clip for those of you who may want a listen.



Boomerang Australian world war 2 fighter aircraft - YouTube

Obviously there is the 'Stuka', but i was wondering about other WWII Favorites you all have????

[Peebs]

A better Clip!!

Tyabb Airshow - Pt 6 -Boomerang, P40 and O2 - YouTube

[MikeGazdik]

That is sweet! Similar to the Mustang. Ultimate P-51 Mustang Whistle Sound Flyby. - YouTube Raises the hairs on the back of my neck!

[GregP]

That sound is the supercharger. All superchargerd engines make that sound, even a Camaro or ... a Merlin. The volume depends on the suopercharger ratio.

[rednev]

That sound is the supercharger. All superchargerd engines make that sound, even a Camaro or ... a Merlin. The volume depends on the suopercharger ratio.

What is supercharger ratio of the boomerang in the film clips ?


tongue firmly in cheek.

[wuzak]

When I went to Duxford a few years back I don't recall the MkIX Spitfires screaming, though I heard some whine from the Mustangs - though not as prominent as that in the video.

I thought that there was some other explanation, but then I found this video

Spitfire T IX East Fortune Airshow 2009 - YouTube

Greg, you sure that car supercharger whine is not for a different reason, eg belt whine?

[rochie]

i thought the whine on a P-51 was from the gun tubes in the wings ?

[Airframes]

Would the supercharger be 'in' at the low levels flown at air displays?

[wuzak]

Would the supercharger be 'in' at the low levels flown at air displays?

Always "in" on Rolls-Royce Merlins and Griffons.

[mikewint]

I recall the Skyraiders in Vietnam making a similiar whistle while making a low pass. Aways thought it was due to various things sticking out into the air stream much the way a car window will "whistle" a certain speeds. My Saturn Sky is turbo and it makes more of a "growl" than a whistle

[evangilder]

The whistle you hear on a Mustang is through the gun barrels. You can hear the difference when you hear one with the barrels still in it versus the ones that are capped off.

[MikeGazdik]

Well, I was always "told" the Mustang howl was from the radiator scoop. Also the "whistle" in the F4U was the oil cooler radiators in the wing roots. I have not seen a Spitfire in person, on video I haven't heard the howl as in the Mustang with the same powerplant.

That being said, when I first heard a Mustang in person, I thought it was the supercharger. I am a drag racer, and thus familiar with the sound of a supercharged engine. I was "corrected" at that airshow and told it was the air scoop.

So which is it? Supercharger, scoops, gun tubes?

[mikewint]

More than likely a combination of all three. The Stuka's made their scream long before sirens were added to increase the sound