Using lessons learned from the B-1, he decided to build a two-seater with a simple rotor design.
He noted that the study was only preliminary, but that it pointed to the need to improve rotor design to reduce turbulence.
The basic problem inherent in rotor design is the difference in airspeed for the advancing and retreating blades.
There are multiple types of centrifuge, which can be classified by intended use or by rotor design:
A second prototype with an improved rotor design was unveiled in March 2004 at Rosvertol.
With a suitably redesigned housing to allow for thermal expansion, the same rotor design has been demonstrated as a steam engine.
Each type of fibre may require a different rotor design for optimum product quality and processing speed.
Piasecki's tandem-rotor helicopters flew higher than competing single rotor designs, and offered a smoother ride.
The unique coaxial rotor design either reduces or completely eliminates these hazards.
The reduction and elimination of these hazards are the strong points for the safety of coaxial rotor design.