Risulta molto interessante la parte sui progetti e sulla sperimentazione, ma in particolare :
<< ... T-38 VTOL: Northrop was heavily involved in V/STOL technology in the early 1960s so it’s no surprise a T-38 VTOL variant was proposed. Note the wingtip and tail fairing roll thrusters for stabilization in the vertical lift and hover mode. Photo credit: Tony Chong collection. ...>>,