i get "historic aviation" catalog put out by greg herrick every few months. great merchandise of books, models, memorabilia, etc. i love looking at what i can't afford to buy right now!!!!

quite frusterating, as i could practically put him in the black in these economic times if i had the $$$$. my question is this...... alot of the books dealing with german / japanese experimental aircraft give pie in the sky facts of supposedly what they could do re: performance, weapons carried / loads / range, etc. i know most prototypes of either nation never made it beyond the drawing board, some did, those facts of the one's that made it to test stage i can take the facts with a grain of salt, but the one's on paper???? well, i wonder how much of the data is embellished by the authors to sell sensational books. just like fishing lures are made to catch fishermen, & not fish. where do some of these authors come up with some of this stuff?? i know what a proposal is for a prototype or experiment, but, where are they backing their facts??