For me each plane takes a bit of getting, and unless you have 3 stars then I would keep, hence I have 9. I use the smaller ones where I have all the 3 stars for basic destinations to collect launch items, and fly to explorations - when Duke flies in I get 10 maps, fly to those then to space destinations until the next Duke visit. Also, when a quest comes along, if it has flight destinations, you can collect more and stars - so the last one had 3 destinations using 3 plane types. Sorry, rambling, but I would keep and expand your hangers etc.thanks for the advice