There were actually two correct answers here, as there are two counties that have 16 airstrips in the book.
Galway & Meath
So well done to Deano and Hedgehopper. Really was a case of fastest finger first. We'll have to double up and give out two books. Both send us your address to email@example.com
and we'll send a copy out. We're also going to have this in ebook format very shortly, details just being finalized.
Aviators Guide Team
William & Lorcan