4Kᵁᴴᴰ P-51 MUSTANG - AWESOME LOUD WHISTLE SOUND !! 

I thought someone taped off their gunports on their P51 to prove that the howling was from the supercharger...or the radiator? I can't remember which?

@@waynesimpson2074 Nope, it's the gun ports. If the sound were coming from the supercharger, it would be constant during full throttle, you can clearly hear it cutting out when turning one way.

@@waynesimpson2074 That was Vlado Llenoch. After taping the gunports, the howling was gone. You can read about this in the mustangsmustangs.com forum.

The whistle does indeed come from the passage of air flowing over the gunport blast tubes of the first (inboard) guns in each wing of the D/K model at high angles of attack such as a turn, a dive, a climb, but not in straight and level flight, which it would do if it was the supercharger. The inboard blast tube has the gun muzzle actually recessed back inside it by about 6 inches. It is literally the same principle as blowing over the mouth of a bottle. If you need further proof then ask yourself why D/K models on the airshow circuits that have no guns fitted and have a clean leading edge do NOT whistle. I had the privilege of flying the D model "Crazy Horse" at Stallion 51 in 2012, it has no guns and does not whistle. If the supercharger theory was correct it must whistle, but it doesn’t. However its stablemate "Crazy Horse 2" has guns and does whistle. Then consider the Razorback B/C versions. Engine, supercharger and radiator air scoop are the same as the D/K. If they were the cause then the razorbacks would whistle in exactly the same manner. But they do not. The only difference (other than the obvious canopy, upper fuselage and minor wing changes) is that they have only 2 guns in the wings mounted in slightly different positions without the blast tubes. They do NOT whistle. It’s NOT the supercharger or the radiator scoop, it’s the inboard gun ports blast tubes.

Always wondered, now I know

Stuka: 🗿

@@Harrier-Stuka was an attack aircraft, had no change against fighters

Thanks! :)

It's definitely the best American fighter.

@@Diemerstein Idk, the P38 might take that title. Much faster, more maneuverable, and had a longer range. Mustangs are cool, but the Lightning is cooler.

American design.....by a displaced German. :)

It was powered by a Packard Motor

Der Stuka der Allierten

Danke Paddy! So wie ich gehört habe soll das heulen durch die Gunports entstehen, und nicht durch die Lufthutze unter dem Rumpf. Denn bei zu Air Racern umgebauten P-51 (ohne offene Gunports) gibt es dieses Geräusch auch nicht.

Im Forum von mustangsmustangs.com schreibt Mustang Besitzer/Pilot Jim Beasley, dass er die Gunports vor einem Flug mal abgeklebt hat, das heulen war weg. Ausserdem heult keine P-51 B oder C so wie das D Modell, wegen der anderen Ausführung der Gunports. Das heulen ensteht bei höheren Anstellwinkeln wie beim abfangen oder manchmal auch sehr leise bei der Landung. Das sind für mich genug Beweise für die Gunports als Quelle des Geräuschs.

Ich danke Dir! Ja, das Mustang Display und der Sound waren der Hammer. Habe ich so auch noch nicht gesehen. Ich wünsche Dir ebenfalls ein schönes Wochenende! Viele Grüße nach Wittmund! :)

Thank you, Robert! :)

Indeed! :)

It's unlikely gun barrels can emit such sound, they're too small and the speed too high. Those sounds accompany moderate Gs, they most probably come from the scoop.

@@no_fb Same aircraft here pulling those same moderate G's - With capped gun ports. No howling but still that great Merlin sound we all love ! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4bH8XQKV0CI.html

Packard

So what? The person who uploaded the video is also German like me and likes this great airplane like me 😄

Some variant didn't have retractable tail wheeles

No its actually the outboard gun barrels whistling.

That's a common misconception. The whistle actually comes from the passage of air flowing over the gunport blast tubes of the first (inboard) guns in each wing of the D/K model at high angles of attack such as a turn, a dive, a climb, but not in straight and level flight. This blast tube has the gun muzzle actually recessed back inside it by about 6 inches. It is literally the same principle as blowing over the mouth of a bottle. If you need further proof then ask yourself why D/K models on the airshow circuits that have no guns fitted and have a clean leading edge do NOT whistle. I had the privilege of flying the D model "Crazy Horse" at Stallion 51 in 2012, it has no guns and does not whistle, whereas its stablemate "Crazy Horse 2" has guns and does whistle. Then consider the Razorback B/C versions. Engine, supercharger and radiator air scoop are the same as the D/K. If they were the cause then the razorbacks would whistle in exactly the same manner. But they do not. The only difference (other than the obvious canopy and upper fuselage changes) is that they have only 2 guns in the wings mounted in slightly different positions without the blast tubes. They do NOT whistle.

No, gun go weeeeeeeeee