What if Westland hadn't chosen the Sea King?

[McColm]

Westland had a manufacturing and technology sharing agreement with Sikorsky going
back to 1945 and started production of the S-51 Dragonfly in 1946, why would they
have suddenly switched to a completely different Boeing product?

According to what is written in the ProjectTech Profiles  'The Admiralty and the Helicopter ' written by James Jackson first published in September 2018. It states that the Sikorsky CH-53A did not meet the required AUW (all up weight) and folded dimensions, also lacked the powered blade folding.  The NASR.358's endurance and engine-out  requirements could only realistically be met by a four-engined helicopter so Boeing-Vertol offered a version of the CH-47A powered by four Bristol Siddeley Ghome H. 1400 turboshafts.

[jcf]

Westland had a manufacturing and technology sharing agreement with Sikorsky going
back to 1945 and started production of the S-51 Dragonfly in 1946, why would they
have suddenly switched to a completely different Boeing product?

According to what is written in the ProjectTech Profiles  'The Admiralty and the Helicopter ' written by James Jackson first published in September 2018. It states that the Sikorsky CH-53A did not meet the required AUW (all up weight) and folded dimensions, also lacked the powered blade folding.  The NASR.358's endurance and engine-out  requirements could only realistically be met by a four-engined helicopter so Boeing-Vertol offered a version of the CH-47A powered by four Bristol Siddeley Ghome H. 1400 turboshafts.

Yeah, but what you titled this topic "What if Westland hadn't chosen the Sea King?".
🙄
Westland wouldn't have been involved if the RN had opted for a Boeing product.

[McColm]

Westland had a manufacturing and technology sharing agreement with Sikorsky going
back to 1945 and started production of the S-51 Dragonfly in 1946, why would they
have suddenly switched to a completely different Boeing product?

According to what is written in the ProjectTech Profiles  'The Admiralty and the Helicopter ' written by James Jackson first published in September 2018. It states that the Sikorsky CH-53A did not meet the required AUW (all up weight) and folded dimensions, also lacked the powered blade folding.  The NASR.358's endurance and engine-out  requirements could only realistically be met by a four-engined helicopter so Boeing-Vertol offered a version of the CH-47A powered by four Bristol Siddeley Ghome H. 1400 turboshafts.

Yeah, but what you titled this topic "What if Westland hadn't chosen the Sea King?".
🙄
Westland wouldn't have been involved if the RN had opted for a Boeing product.

They might have built the Chinook underlicence.