This place... is great. Well, if you like planes. Otherwise you might be a bit bored…read more..
It's a bit hard to get to, for a foreigner. It's at an airport, but not one you'd fly into. So there's a train and then a bus, and hope you get off at the right stop (the bus driver and passengers were helpful.)
The museum is huge, with many indoor and some outdoor exhibits. A small side area has hundreds of scale models. Admission is free unless you're interested in the simulator, a kids' activity area, etc. Lots of English captions. There is an early flight gallery, focused, unsurprisingly, on French efforts. A reproduction of the Voisin factory is surrounded by many original and replica early aircraft. A catwalk provides unusual views on the collection. Moving on, there is a World War I gallery, chock-full of info and planes. The between-the-wars gallery was being renovated while I was there. The prototype gallery was perhaps the highpoint for me; not all prototypes, some planes that were in service, but definitely some unusual prototypes. There is a nice WW2 building, a helicopter gallery stuffed with blades, a multi-level space gallery, and a building holding 2 Concordes. Yes, two. Plus a Mirage IV, which isn't small itself. You can tour the Concordes (again, extra, and I'll save you the trouble: it looks like a really skinny airliner inside.)
Outside there are a couple of Ariane rockets, a few maritime patrol planes, a Canadair water bomber, some Jaguars and Etendards, assorted Mirage prototypes, a Rafale, and a surprise: several Saabs. There's a 747 you can tour (extra, again,) and a few other airliners. I wandered around with, I'm sure, a huge grin on my face. I'd go back in a heartbeat.