In the late 1970s, he produced two Sikorsky S-72s (a.k.a. X-wings) as Compound helicopters (Gyrodyne) and as Roter System Research Aircraft (RSRA) to break through the speed limits of helicopters.
These aircraft achieved the goal of exceeding the speed limit of the helicopter for the time being, but the subsequent development stagnated because the budget was canceled without realizing the transition flight to the fixed-wing aircraft, which was the original goal.
In addition, science and technology at the end of the 20th century could not solve the price increase and system complexity caused by mounting four engines on an aircraft, and the short flight time due to the large consumption of fuel.
More addition, the cancellation of the plan left an unsolved problem regarding the stability of the flight of the aircraft transitioning from the rotary wing to the fixed wing.
Sikorsky subsequently developed the utility helicopter " SB-1 Defiant ", the attack helicopter AH-70 G Defiant-X, and the reconnaissance helicopter RAH-68 Raider X.
These aircraft are pure Compound Helicopters, and from the beginning, challenges to the transonic speed range, as well as transition flights to fixed-wing aircraft, were not considered.
However, by analyzing the science and technology used in the giant spacecraft that an unknown intelligent humanoid crash landed on the earth in 1999, it will be possible to shelve the depletion of fuel using unknown energy called Protoculture. The realization of a fusion turbine engine, as well as the innovative science and technology of Transformation called VERITECH ("Variable Engineering and Robotic Integration-TECHnology") , has once again paved the way for a reheater in a canceled project of the last century.
This S-72N (Nuclear) is to bridge the innovative system of AGAC by the conventional technology of the 20th century and the new technology of the unknown alien civilization.
It was named initially "Crosslink Auroran" (initial period of a.k.a. "Crosslink AGAC").
An attempt was made to reverse engineer the S-72, a precedent of the last century, for the transition of AGAC from fixed-wing mode to helicopter mode (Gyrodyne).
For this reason, we completed the transition mechanism from the unfinished fixed wing to the rotor of Unit 2 (c / n 72-002, received NASA serials 546, 741 and N741NA) stored in the Ames Research Center (ARC). Along with redeveloping the system, many parts were newly built by the 3D scanning device.
Aircraft #2, c/n 72-002, received NASA serials 546, 741 and N741NA between February 1979 and October 1994. Remained stored at NASA Ames Research Center (ARC)
V ls Δ shape fixed wing , and X is rotate blade configuration (Roters)!
The stability of the aircraft during the transition from a V-shaped (Δ) secondary wing to an X-shaped rotor was studied.
In addition, a mechanism that absorbs rotor torque and safely stops its rotation with a powerful brake is essential for a safe transition from a helicopter to a fixed-wing jet aircraft with a turbofan.
Suggestion named after "Eos" (the parents of Aurora in Greek Mythology)-Auroran.
In addition, Sikorsky's parent company, Lockheed Martin, will provide Sikorsky with technical information on the development of the VFH-10 AGAC and even the VFH-12 Super AGAC to ensure the success of the next generation of VERITECH Fighter. Meanwhile, Sikorsky has signed an agreement with each other to provide feedback on the technical information obtained during the development of the VFH-72N by providing it to its parent company, Lockheed Martin.