I!"#$%&'"#(')$*+($+$,+-.(/"-$0-!&-00#$

Igor Sikorsky s Inventive Genius Produced 66 Patents Awarded In America. This issue is devoted to his unique conceptual designs that did not progress to production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djustable Rotor First Helicopter Sikorsky Autogyro Engine Driven Free Turbine within Main Gearbox Retractable Lift Increasing Apparatus Main Rotor Vibration Absorber July, 2011 (203) 386-4356 I (203) 386-4218 Contact us at iisha@snet.net Newsletter 2006. The Igor I. Sikorsky Historical Archives Inc. All rights reserved.

July 2011 2!"#$%"&'()*+"&,%*--*(*$.+ -/0120%&34%567786798%:;;<1=%>/?@A%BC6%57D8 Large amphibious aircraft such as the S-41 and S-42 required more power to take off than land based aircraft due to the increased empty weight required for the boat hull struc- actuated retractable wing and airfoil structure located at the trailing edge of the main wing to increase lift during takeoff.!"#$ Figure (4) Figure (5) Figure (6) The lift increasing apparatus is comprised of two movable wing sections that are hydro mechanically actuated from the stowed position against the side of the fuselage shown in through an arc of motion shown in, shown in. It is secured to the trailing edge of movable airfoil sections are shown in Figures (4), (5), and (6). The locations, shapes and positions can be varied to purposes on landing.

July 2011 3!"#$%&'(")&'*+,-"."*/'*"#%#*)&,01231'/45'678987:8;'<==>2?'+0@AB'87'6;:C During Igor Sikorsky s successful aviation pioneering years in aviation love and attempt to build a vertical lift aircraft the H1 and H2 at the age of 20. His patent for an autogyro brought the vision back from the past. The Sikorsky Aircraft Company was very successful during the early 1930s designing and building of the S-38 and his desire to create a direct lift aircraft to the am- The unique features of this patent combines the engine driven propeller power to provide the forward motion needed to take off, as well as air pressure to drive the direct lift rotor. This is accomplished through a system of air passages in the propellers. The pressurized air is distributed through a network of channels to the lifting rotor during the forward motion of the aircraft. The rotor total lift capacity is therefore a combination of its own aerodynamic capabilities and the reaction driven rotor blades. One additional feature in this patent shown in Fig. (2) is a con- S-38 H1 H2 Figure.. (1) In an aircraft, a direct lift reaction driven propeller, a rotatable vertical shaft on which the propeller is mounted, medium under pressure and including bearings for said shaft enable it to tilt to move the shaft relative to said airfoil out of its normal vertical position. Fig.(2) Contact us at iisha@snet.net

July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

July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ontact us at iisha@snet.net

July 2011 6!"#$"%&'()$*+,(+-.*#-&(-/((,'&$+-)*'#(+-"0$"&(#-*-#1 )23453(.67(89::;9;<8(=>>?4@(A4B4CD4E(889(FGH; T setting the collective and cyclic pitch of one rotor so that the aerodynamic and dynamic forces of that rotor will control and maintain the pitch settings of the second rotor as desired. This design provides a single large blade rotor counterbalanced with a weight and a smaller bladed pilot rotor counter rotating to the large rotor shown in. A schematic of a dual engine drive system relative to the main rotor is shown in. The smaller diameter pilot rotor is located above the larger single bladed rotor, and it develops lower aerodynamic loads and control forces. The cockpit controls are linked to the smaller rotor for required collective and cyclic pitch changes. The collective and cyclic pitch changes set by the pilot rotor are transmitted to the large counterbalanced main rotor by a system of control linkages, jackscrews and gears shown in and(3). Pilot workload in the cockpit is thereby reduced. H2 1910!""#$%&'(#)'*+#,'%&+#-*#'%&./-$ Although Igor Sikorsky s helicopter legacy was the development of a single ABC 1965 X2 2010

July 2011 7!"#$%&'(")*'&+")** (),-./$..$&-*.0.("/ '12342*-56*789::8;<9*$==>3?*@>AB*C78*C9;< During the 1960s, medium and heavy lift helicopters were developed utilizing shaft turbine engines with front and rear drives like the S-61, S-64 and S-65 series. This patent is for a new approach to design a turbine drive propulsion sys- tive to the transmission system. The advantages of this design would eliminate drive shafts, clutches and gear reductions between the engine free turbine and the main transmission. It overall part count and weight reduction would be achieved. is a view looking down on the aircraft with a cross is a schematic of the two engine gas producers which direct the pressurized engine air into a duct system of four power stage gear and planetary reduction to the main rotor head The overall result is a short hollow main rotor drive shaft that main blades for anti icing or blade tip jets. The envisioned this patent a unique conceptual design. S-61 S-64 H-53/S-65 Contact us at iisha@snet.net

July 2011 8 Join the Sikorsky Archives Igor I. Sikorsky Historical Archives Inc. MS S 578A 6900 Main Street Stratford, CT 06615-9129 Life Membership $125 3 Year Membership $25 1 Year Membership $10 Please send a check or money order (do not send cash) payable to The Igor I. Sikorsky Historical Archives, Inc. Name Address City State Zip Phone Number(s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ain Street, Stratford CT 06615