I took a photo of my Mavic Pro in the air using my phone, the props look anything but straight 
Weird eh?
Something to do with low shutter speeds on my phone I guess?
It’s the effect you get from digital shutters. Quite a few pics around of planes and helicopters with ‘bendy props’.
you should check out a guy on YT called destin hey does channel called smarter evry day did a vid about this a lil while ago.