Wow, this is a great place to visit if you are an aviation enthusiast. If aeroplanes (or helicopters) are not your thing I still don't think you will be disappointed as it is such a great museum.
Free on Tuesdays and not overly busy either. If the weather is kind to you then you are in for a real treat with so many exhibits to view. There are some really good displays inside s well with several hangars filled with displays.
Definately worth a visit, but set aside 2 - 3 hours for the trip.