garymortimer writes: Weighing close to one ton the platform is lifted by ducted fans and is slated to have a top speed of 250 knots or 287 mph. A Turbomeca Ariel turboshaft engine powers the two ducted fans. You can certainly hear it coming!
"The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment." -- Richard P. Feynman