Normally I would say that this is cruelty to animals but, in this case it is just flies. I mean these are the animals that we smack with a flyswatter, newspaper or any thing handy.
In saying all of that I have to say. . .Damn that one cool looking thing. I wonder if you can make bigger planes out of bigger insects like bumble bees, wasps, horseflies or locusts.
Here is an image to make you want to kill all those flies making your airplanes.
