I was reading a story someone had posted online for feedback once, and pointed out to the author that Pawnees and Shawnees are already names of existing aircraft, and they are not the aircraft that he was describing in his story. The author, responded by telling me his audience wasn’t going to know better.
To an extent, he may be right about the majority of his audience.
But think about it. How many times have you heard horse lovers rant about how horse books and horse shows get horses all wrong? Or doctors face-palming when they see doctors on TV pull out the defibrillators.
And then think about your potential audience. Do you really think that if you’re writing a book with aeroplanes in it, where the main character is a pilot, that a reader who’s a pilot isn’t going to be the number one most likely person to zero in on the aeroplane on the cover of your book and yank that puppy off the shelf? That reader is also the number one most likely person to return for more and become a devoted reader because they love the thing you’re writing about, and there aren’t that many people writing about their specific interest.
I’ve read from some successful writers, the key to making a living as a writer is to develop a dedicated following of faithful readers who will buy everything you write, not to rely on the random whims of readers browsing shelves. That if you can get a few thousand dedicated readers, your income can be stable, and your sales numbers predictable, rather than all over the place.
Do you want that reader to be the one who’s most disappointed by your lack of research The one who’s most likely to be forgiving of other flaws in your book because it contains their particular brand of crack? Do you want the reader who’s most passionate about the topic you’re writing about to be the one who throws your book against the wall because you mixed up an engine stall with an aerodynamic stall?
I’m speaking more as a reader, here, than as a writer when I say for the love of whatever god you worship, have respect for your readers and don’t assume they’re ignorant.