The inletscreen you seen on the chinook is indeed for protection against sand.
Because they train a lot on the brown out landings damage can occure.
That is why they modify the engine`s.
And about power loss you can almoust for get about that.
It only will cost up to 3% max.
This is a subscription only section
Want to read more? It's only €10/year.
No account yet? Just Create an account first and head to the shop