CLEARANCE: Above Top Secret
- May 26, 2006
- Reaction score
And he gives S-63-2 specs as follows.Chapter 2 said:The S-63-2 was a twin-engine derivative of the single-engine S-62 Sea Guard acquired by the US Coast Guard and one of two “paper” helicopters proposed by Sikorsky to meet the RCN’s requirement. The other was the S-65, apparently a considerably smaller helicopter. Source: RCN NSS 7801-102 (STAFF) 18 June 1959. “Comparison Study Kaman HU2K and Sikorsky S-63-2.” See Annex A for helicopter specifications.
However, Mr. Delaney describes it somewhat differently.Chapter 2 said:Sikorsky S-63-2 (Proposal)
Description Antisubmarine helicopter Engine Two T-58 turbo-shaft engines. (T-58-6 or T-58-8) Provenance Described in the reference as a “cut-down HSS-2 for RCN role.” Armament Homing torpedoes or depth-bombs
Source: 105. RCN NSS 7801-102 (Staff) 18 June 1959. Comparison Study Kaman HU2K and Sikorsky S-63-2. RCN NS 7820-102 (Staff) 18 January 1961, “ASW Helicopter Procurement.”
But then there is also that mention of an S-65, smaller than the S-62 and thus much smaller than the S-61 Sea King. Orr gives it only a passing mention but does provide specs:Chapter 3 said:"The S-63 was based on the prototype HSS-2 Sea King ASW helicopter with rotor control and transmission components of the HSS-1N (S-58) as well as three powerful engines."
Source: Jane’s All the World’s Aircraft, 1959/60 (Toronto: McGraw-Hill, 1960), 382–83.
Don't know if this is useful at all, but it sure seems as though the RCN was being given access to some early Sikorsky turbine concepts (c.1958-59) for a series of related flying boat hulled designs:Chapter 2 said:Sikorsky S-65 (Proposal)
Description Antisubmarine helicopter Engine One or possibly two T-58 turbo-shaft engines Provenance Likely comparable to S-62 with flying-boat hull but probably with four-bladed main rotor derived from S-58. Possibly similar to four-bladed S-62 (Model S-62B) developed for the Indian Air Force. Smaller and approximately 2,500 pounds (lb) [1,134 kilograms (kg)] lighter than the S-63-2. Armament Homing torpedoes or depth-bombs
Source: Kenneth H. Sullivan and Larry Milberry, Power: The Pratt and Whitney Canada Story (Toronto: CANAV Books, 1989), 234; and RCN NS 7820-102 (Staff), 18 January 1961, “ASW Helicopter Procurement.”