What is your Favourite Engine Sound?

My one is the TF39 {Videos in case you never heared baout this engine}


We appreciate your post & effort trying to engage with other users! But please try to come up with something a bit more constructive in terms of topics. "What’s your favorite … \ “What’s the best XXX livery” does not contribute to any interesting discussions and only ends up with Facebook-like threads with little or no relevant content.

Thank you!