A whittle bit of this and that.

There was no shortage of good ideas when it came to getting the jet engine off the ground. The real stopper was there was no materials or equipment that could handle the temperatures or pressure levels that were going to be needed to run a jet engine with enough snot to propel an airplane faster that an propeller driven engine.

For example, in 1915, the Hungarian Albert Fono devised adding a ramjet to a cannon fired projectile. The idea was the size of the cannon could be smaller and lighter as the jet engine equipped bomb would fly father on it's own. Although it was never built (denying the world ballistic missiles for, oh, a good 25 more years or so) he did patent a jet propelled airplane in 1928. It too, was merely a blueprint that awaited smarter minds and cleverer processes.

Maxime Guillaume, a French engineer, actually was the first to patent the jet airplane. He eclipsed the Hungarian by 7 years.

A Norwegian, a Hungarian, a Frenchman and finally a German and a Brit. The jet was about to be born.