P-47 Radial Engine Sound

[BornToBattle]

First off, the studio is to be given big congrats on the most recent release! Not just on the four aircraft, but the tons of items they have improved upon as well! A lot of companies out there would just as soon take your money on the newest and latest update whilst forgetting any of the past refinements like we have seen within the latest IL2 series. And all of this while working on the new map. Amazing. Now I'm not trying to open up a can of worms here and pardon my ignorance if I'm wrong but...

 

...one thing I couldn't help but notice on this huge radial "Jug" when it passes by my camera as a flyby is how very noticeable the sound changes as she passes by. Coming in, she sounds just as I would suspect with that big radial. A deep growl. Nothing sounds like a radial. Awesome! Two thumbs up on nailing that! But as she passes and the viewer is behind the aircraft it seems as though it suddenly changes pitch in a very pronounced way into that of a, well...lawnmower, somewhat? It's as if there is a higher pitched sound overlay on top of the familiar radial fading off away from the viewer. It just sounds quite a bit different when departing the stationary viewer than it does when approaching.

 

Again, my apologies if I'm way out in left field here on this with radials but with the airshows I've been to featuring both single and multiple radial aircraft from WW2 and the videos posted from RL that distinct radial sound seems not to change as it does in the sim when passing by the viewer. I watched and listened to a few flyby's of restored P-47's and it seems the sound of the engine pitch just doesn't change as she passes by, it simply becomes more distant. Thanks in advance and I do not wish to step on the sound dev's toes with this one and end up having a thread lock but just curious from those who might know first hand the effects of this involved here. Perhaps it's my imagination.

 

Cheers!

Edited November 26, 2018 by BornToBattle

[JonRedcorn]

95% of the restored p-47's don't have operable turbochargers, and if they do they are usually off. Can't really compare the two.

[BornToBattle]

Okay, so the sound difference between what I’m hearing IRL versus the sim then is the turbocharger. Weird how the turbo whine can only be heard behind the aircraft, as in going away and not inbound. Then the sim sound of the ‘47 radial is the real deal, whether coming or going. Good to know. I’ll get used to it then. Thanks!

Edited November 26, 2018 by BornToBattle

[Voyager]

Well, the turbo is in an aeroshell that's only open towards the back. It seems reasonable that the sound of it would be drifted that way as well. 

[=SWF=iceman14555]

I've been talking about this since it's release, it was the very first thing I noticed. The sound on the P47 really needs some love. It's almost as if they turned the propeller sound up too much and it drowns out the engine sound. I really think it's off, especially in comparison to this video:

 

https://youtu.be/EGLCT1Ng8SU

Edited November 26, 2018 by iceman14555

[Ehret]

4 hours ago, BornToBattle said:

Okay, so the sound difference between what I’m hearing IRL versus the sim then is the turbocharger. Weird how the turbo whine can only be heard behind the aircraft, as in going away and not inbound. Then the sim sound of the ‘47 radial is the real deal, whether coming or going. Good to know. I’ll get used to it then. Thanks!

 

Higher frequency sounds are more directional than bass tones. It's possible that the front of the P-47 would obscure the high pitch turbo whine. Other explanation could be the Doppler shift makes the inbound turbo pitch go over the hearing range threshold. When it passes and go outbound it will lower the pitch making the turbo whine easier to hear.

[LeLv76_Erkki]

There are many planes that sound different from ahead compared to sides or behind. Sometimes the difference is very subtle, sometimes you'll hear turbo/supercharger whine very clearly ahead or behind. Not just doppler shift. Use external view camera to go around some planes and you'll be surprised!

[Bilbo_Baggins]

8 hours ago, 392FS_Jred said:

95% of the restored p-47's don't have operable turbochargers, and if they do they are usually off. Can't really compare the two.

 

I don't think he's talking about turbocharger whine- that's a different sound. He's talking about what I think is supposed to be the noise of the propeller. It is very strange on this machine when it goes past you on F3 fly by view, it sounds completely off like one of those cartoon aeroplanes or as the OP said, a lawnmower. From the front it is great. 

 

Tu-95 bear turbo-prop bomber is the loudest plane in the world I believe, due to it's propeller tips exceeding the speed of sound. When the P47 passes you it sounds not too dissimilar to the tone of that machine in DCS.

 

Also, when you are flying and another p47 goes past you, it is very loud and you can hear this peculiar tone clearly. Far louder than other types of machines flying near you. I'm surprised this issue didn't get mentioned earlier. 

Edited November 26, 2018 by Bilbo_Baggins

[Legioneod]

30 minutes ago, Bilbo_Baggins said:

 

I don't think he's talking about turbocharger whine- that's a different sound. He's talking about what I think is supposed to be the noise of the propeller. It is very strange on this machine when it goes past you on F3 fly by view, it sounds completely off like one of those cartoon aeroplanes or as the OP said, a lawnmower. From the front it is great. 

 

Tu-95 bear turbo-prop bomber is the loudest plane in the world I believe, due to it's propeller tips exceeding the speed of sound. When the P47 passes you it sounds not too dissimilar to the tone of that machine in DCS.

 

Also, when you are flying and another p47 goes past you, it is very loud and you can hear this peculiar tone clearly. Far louder than other types of machines flying near you. I'm surprised this issue didn't get mentioned earlier. 

When ther P-47s fly by and you hear that high pitched whine, thats the turbo. But there is another sound during flybys that sounds different from the turbo whine.

 

Personally I think all external sounds sound a bit low compared to internals which makes sense to a degree but they should be a bit louder.

 

I can go full power and internals it sounds fine but external it sound like I'm at idle.

[TWC_Ace]

Maybe would be cool for making movies but in RL (and we pretend we want realistic sim as close to RL as possible) you wouldnt hear engine sounds from other planes when in closed cockpit...you will hear only the engine of your plane...

Edited November 26, 2018 by blackram

[Voyager]

5 hours ago, blackram said:

Maybe would be cool for making movies but in RL (and we pretend we want realistic sim as close to RL as possible) you wouldnt hear engine sounds from other planes when in closed cockpit...you will hear only the engine of your plane...

Tracked down a study on glider cockpit noise in an earlier thread, but it turns out that raw wind noise is a major contributor to cockpit noise. It may be that that tends toward being white noise which we seem to not notice, even though it prevents one from hearing anything over it. 

[BornToBattle]

14 hours ago, Bilbo_Baggins said:

 

I don't think he's talking about turbocharger whine- that's a different sound. He's talking about what I think is supposed to be the noise of the propeller. It is very strange on this machine when it goes past you on F3 fly by view, it sounds completely off like one of those cartoon aeroplanes or as the OP said, a lawnmower. From the front it is great. 

 

Tu-95 bear turbo-prop bomber is the loudest plane in the world I believe, due to it's propeller tips exceeding the speed of sound. When the P47 passes you it sounds not too dissimilar to the tone of that machine in DCS.

 

Also, when you are flying and another p47 goes past you, it is very loud and you can hear this peculiar tone clearly. Far louder than other types of machines flying near you. I'm surprised this issue didn't get mentioned earlier. 

This is more I guess of what I’m hearing, it’s not so much a whine really, at least to me. My Camaro had a supercharger (I realize it works the opposite of a turbo but still) and when it kicked in you could hear it but it never drowned out the engine going full tilt...it was more of a fainter background whine. I dunno. I take it then the turbo in the P-47D ran constantly and wasn’t variable since I hear the same noise once it passes by regardless of how much, or little, I’m hammering the throttle to the firewall. Makes sense what everyone has posted though. I guess I love the growl of radials too much! I’ve heard the radials on B-24’s and B-17’s on flybys and just never noticed what I’m hearing on this ‘47 as she goes past. It sounds like two completely different aircraft coming and going. I guess I’m used to all the non-turbo aircraft in L2 doing flybys past these camera. Interesting.

 

 

[BornToBattle]

Sooooo as an update...

 

it it sure sounds like once this latest update was implemented the P-47 now sounds 100% better, most noticeably when using the flyby mode to view it. Is it just my imagination though? It seems to hold much more of a growl now than it used to when passing by in the camera mode. 

 

Love the 4K textures too.

 

Either way, two thumbs up!

[Field-Ops]

Just tried it and it seems that way to me too. Seems the doppler effect is better used for the deep roar of it leaving.

[BornToBattle]

I thought so. The way it sounds now is what I was expecting to hear originally. I didn’t notice this is the release notes, unless someone can confirm otherwise. Way better now!

[pencon]

Most of the engine sounds on pretty much all the planes could use improvement. Tiger Flybys from 46 sounded Much better.  Great Sim but I do hope they improve sounds one day .

Edited February 7, 2019 by pencon
Because

[Jade_Monkey]

The external "Go Pro" cameras seem to have an issue where no engine sound at all is played. I don't know if that is some sort of game engine limitation or just a bug but it has been around for a long time.

 

It might only happen in the recordings, not sure.

[Rolling_Thunder]

1 hour ago, Jade_Monkey said:

The external "Go Pro" cameras seem to have an issue where no engine sound at all is played. I don't know if that is some sort of game engine limitation or just a bug but it has been around for a long time.

 

It might only happen in the recordings, not sure.

Engine sounds in external views were very, very quiet for me in my turtle beach wireless headphones. My headphones had two entries

Turtle beach headphones 

And

Turtle beach headset.

I switched from headphones to headset and the sounds returned. I don't think that issue is game related. More hardware, driver issue

[=SWF=iceman14555]

I think it does sound better, but the prop effect is still way too loud