Boeing will build the next generation U.S. fighter jet, President Donald Trump announced Friday from the Oval Office. The company was awarded $20 billion for the aircraft to be called the F-47.

He’s building his own linear amplifiers on what looks like sheets of MDF. This is an evolving design and the two videos after the break show two different iterations. He’s salvaged several ...

They then validated the results of the simulations by building a two-stage thermoacoustic heat pump system prototype. A series of tests shows that the prototype is able to achieve, in typical ...