Commander, Naval Air Systems Command, Code AIR-21412, Washington, DC 20361-2140

16 -- VIBRATION SUPPRESSION SYSTEM POC Contact, Sandra Haberlin, Phone (703)604-6100 The Naval Air Systems Command (NAVAIR) is seeking sources that have developed, prototyped, tested, and installed an active vibration suppression system in a military or commercial turboprop airplane or helicopter. This system would be installed on an E-2C aircraft, with the possibility of being installed on other fixed wing aircraft (C-2A, P-3 or C-130). The E-2C requires an active control system that is capable of dampening vibration throughout the aircraft, primarily at 1P (nacelle and wings) and 4P (walls of the fuselage) frequencies and higher harmonics. This capability if installed on an E-2C aircraft should be able to significantly reduce vibration levels in the cockpit and Combat Information Center, increase the longevity of the airframe by reducing high cycle fatigue cracking, reduce avionic equipment failures, and thus reduce aircraft logistics support and life cycle costs. The vibration environment in the E-2C aircraft is the result of two main forcing mechanisms: propeller out of balance forces (1P) and the propeller slipstream forces (4P) impinging on the fuselage in the tip plane. No current year funding is available to support a program to install, integrate, and test an active vibration system in an E-2C aircraft. Contractors who have developed and demonstrated an airworthy active control vibration system should provide their names, addresses, and phone numbers in writing to the Contracting Officer, Naval Air Systems Command, Mrs. Sandra Haberlin, AIR-2.2.1.1, Arlington, VA 22243-5120 by 12 June 1995. The contractor will not be reimbursed for providing this information. The Navy has not made a final commitment to solicit proposals for this capability and this request should not be construed as such a commitment or authorization to incur any costs in anticipation of such a requirement. Responses should include the name of a point of contact having the authority to discuss requirements with government representatives. Acknowledgement of receipt will not be made, nor will telephone inquiries be honored. See note No. 22 - NAVAIR Synopsis No. 40107-95. (0144)

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