Well, your comment was very off topic.
@Graf, I have noticed it, but not after the WWII update. I must not have given it any attention. This is rather strange, actually, because I found in the modelviewer that there is a control that WILL give the propeller a volume from the side. But...I never see it ingame. Just like I've never ever seen those exhaust flame effects ingame either, yet there they are in the MV.