FLYBOYJ
"THE GREAT GAZOO"
Another one about to get beat to death -When Hap Arnold presented the plans the Brits gave him after an impressive demonstration in April, 1941, five engineers discounted it immediately. Had even one considered a prototype, perhaps in the Detroit area which had access to the wooden Chriscraft Boat Works, a few prototypes could have been floated. conceivably, a couple of thousand could have then been built within a year. As it was, we borrowed theirs in 1943 for reconnaissance missions and secret projects. Elliott Roosevelt was a strong proponent of this development.
First, Arnold just "presented" drawings to 5 manufacturers to basically ask "what do you think?" If you were a manufacturer would you want to critique or even give a positive critique of your competitions product? Arnold got one response.
Second and this is a big one - THERE IS NO PROTOTYPE WITHOUT A CONTRACT!!!!! Aircraft manufacturers just don't go off and start building airframes without some type of contract tied to a specification. Unsolicited proposals are possible but you'll find it's very rare if a manufacturer will build a proof or concept or prototype spending their own money.
Had this been a serious plan by Arnold of the AAF, they would have gotten money appropriated (which was starting to flow at that time), worked with deHavilland to get a licensing agreement and then put out a solicitation to manufacturers to bid for a contract.