in this case. 

Lawrence Thomas testified that he is vice-president of Baxter & Woodman, a civil engineering firm that provides engineering services for the Village.   He was involved with  the issuance of both the 1987 and 1992 NPDES permits.   He explained that in 1987, when the Village objected to the effluent limits proposed by the IEPA, the IEPA agreed that the way to solve the problem was to rerate the facility to 9,900 P.E. so that the Village would be in compliance with the regulations.  When the draft 1997 permit was issued with the lower effluent limits, he discussed the situation with Don Netemeyer, a staffer with the IEPA, and provided him with materials concerning the issuance of the 1987 NPDES permit.  He agreed with the IEPA’s statement   
The blades are thus rotated about the first axis integrally with the drive shaft and the hub.
The blades are also fitted to the hub to rotate about their respective second axes to adjust their pitch angles with respect to the airflow, and so adjust the lift generated by the blades and hence the thrust generated by the anti-torque rotor.
In one known solution, the helicopter comprises:                a pilot-operated pedal inside the cockpit defined by the fuselage of the helicopter;        a rod movable along the first axis and connected operatively to the blades to rotate the blades by equal angles about the respective second axes