does any company in u.k.produce decals of blackhawk insigna/logo.also is there a kit of the f5fon the market at present?

Alas, shown is the Blackhawk comic book model. When I started reading Blackhawk comic books, the F5F was the star. The 7 Blackhawks each had an F5F and they seem to progress through experimental planes. The last I remember was the F-90 which I believe was Lockheed's first attempt at a swept wing fighter. Where did all those comics go???? Remember it did take some time to find out there was such a plane as the F5F as things were pretty hush hush in those days. While the F5F was really cool looking, the child of the F5F, was the exceedingly beautiful F7F.

If development had continued, the history of the twin-engined fighter would have been very different...

where can one get a model of this airplane ?

The fighter itself was an incredible leap forward in technology, but like planes like the P-39 and other, it was too radical a design with too many new untested ideas.

The XF5F can be usefully thought of as the backup to the possible failure of radar development: An interceptor whose extreme climb performance permitted launch on the very short warning of an incoming raid provided by visual detection from a screening destroyer. Perhaps fortunately, the F5F lost its mission before its developmental troubles could be cured.
The F5F's problems involved engine cooling and aerodynamic turbulence due to its too-short engine necelles. (Compare the Cyclone installation on the later S2F.) What the aircraft really needed was a smaller diameter engine - imagine a larger-displacement equivalent of the Gnome-Rhone 14M.

Este avião é maravilhoso. Como conseguir o projeto para construção dele para radio controle na escala 1/4 ou em escala menor?

Este avião é maravilhoso. Como conseguir o projeto para construção dele para radio controle na escala 1/4 ou em escala menor?

It actually was continued into the F7F Tigercat, a clear descendent of the Skyrocket

In the early 1940's the comic book "The Black Hawks" featured a squadron that flew the Grumman Skyrockets. They later switched to jets after WWII.

The plane was ahead of it's time.

This aircraft had reportedly superb flight and handling preformance, it's only technical problem was unreliable landing gear, which could have been ironed out with commitment to the project. However, the reason the F5F was not adopted was reportedly a logistics issue...it was thought it would be too hard to maintain a twin-engined fighter in the field, which strikes me as odd...the F5F had radial engines, simple and reliable, whereas the P-38, the adopted twin-engine fighter, had in-lines...which are more complicated and harder to service...
If development had continued, the history of the twin-engined fighter would have been very different...