i suggest redesigning the jet engines on simple planes since the design was so old and inaccurate of how the jet engine actually behave

and since there no other options to customize it in the game i want a completely redesigned jet engine

oh can't forget to mention that the game is missing the rocket engines as well

also propellers needs a little sound update yes there is radial engines and turboprop

but there is a simple propeller i think it should have some engine like inline engine to make them work as inline engines are totally missing from the game

also having the ability to customize it with lots of options such as power and torque and etc