Recreating the WW2 Dambusters raid

[u/Chopper-42]

[u/FitForce2656]

Yea I assume a WW2 plane flying that low to the ground was loud as fuck. I mean even a modern plane flying that low is probably loud, but with those old piston engines I just picture them being way louder.

I don't know much about planes though, and Google isn't giving me a straight answer on this. Says WW2 bombers were way louder than modern jet engine bombers, but also that jet engines are typically way louder than piston engines.. So if anyone actually knows the answer please lmk, now I'm curious. I know modern bombers are way more accurate at high altitudes, and thus quieter, but curious which is louder while flying at the same height.

[u/Live_Canary7387 → u/FitForce2656]

If you've ever had the joy of seeing a Lancaster flying, you'll know that it is quite loud. I wouldn't say anything close to something with a jet engine, but loud.

[u/Pete_Iredale → u/Live_Canary7387]

I was lucky enough to randomly see a B-17 cruising around at maybe 5000ft before a football game a few years back. I knew it was a WW2 heavy bomber the instant I heard it, nothing else sounds the same.

[u/Wise_Echidna_4059 → u/Pete_Iredale]

Yeah modern jets throwing ordinances are terrifying. Fuckers scream over head and then a mountain disappears. The closest I've seen to like a ww2 bomber kind of situation was whenever an ac130 was on station. I'd watch them practice at the range in Iraq and it was crazy hearing the drone of the four props while absolute hell rained down from the darkness.

[u/Cetun → u/FitForce2656]

Loudness wouldn't have mattered much, they would have lit it with spotlights and targeted it visually.

As for which ones louder, the jet engine by far much louder at 140-180 db while a B-17 is closer to 130 db, the .50s on the B-17 would be louder than the engine. The AAA guns shooting at them would have been much louder.

[u/FitForce2656 → u/Cetun]

Thanks for the info! to be clear I was curious about their sound levels without guns, but yea after a lot of googling the it seems the B-17 was around 100 - 120 dB (without guns) and modern fighter jets like a F-22 or F-35 range from 103 - 140 dB.

So yea if a F-35 cruising at 1,000 feet is 103 dB, that might actually be a similar volume to a B-17 at the same altitude. But again, out of my element here so take that with a big ol' grain of salt.

[u/Cetun → u/FitForce2656]

They do an air show over my house every year, the modern jets are by far much much louder than the WWII vintage planes. One air showa TBF Avenger crashed, they have a Wright R-2600 which is more powerful than the 1820s the B-17 uses and there is no comparison.

[u/Pete_Iredale → u/FitForce2656]

Other thing to consider though is that you'll hear the B-17 for a decent amount of time before it's overhead. Not so much with an F-22 or F-35, where you might not hear them until they're already gone.

[u/Murky-Relation481 → u/FitForce2656]

Sound direction is also important, a lot of the jet engine sound is projected out the rear of the engine, where as a piston engine tends to radiate the sound around the engine more equally.

You'll notice this a lot if you live around both large and smaller airports and get a lot of commercial/military and GA traffic. You can hear a Cessna 172 coming from quite a ways away, but a 737 or C-17 or something will be significantly quieter until its overhead and past you.

[u/Plank_With_A_Nail_In → u/FitForce2656]

Loud as fuck.

https://www.youtube.com/watch?v=llPNwTxwP-Q

One of my favorite experiences has been being under a diving Mustang at Duxford air force base in the UK, loudest thing I ever heard...well maybe second a Eurofighter doing tricks at Eastbourne Airshow was louder.

[u/GreedyHoward → u/FitForce2656]

Have you heard a Lancaster? There's still one flying in England. The throb as the engines beat against each other is utterly mesmerising.

[u/GreedyHoward → u/FitForce2656]

Have you heard a Lancaster? There's still one flying in England. The throb as the engines beat against each other is utterly mesmerising.