Posts: 6
Joined: Sun May 24, 2015 7:00 pm

Sikorsky S64

Tue Jan 23, 2001 5:11 pm

Good day everyone here!
It seems to me I will be assigned to new job. The company maintains Sikorsky S64 with P&W JT 12 installed. Has anyone got previous experience with either this type of helicopter or engine?
Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

RE: Sikorsky S64

Tue Jan 23, 2001 8:51 pm

Hi Evgeny, Buzz here. Well, one of the guys at work used to work for Evergreen Helicopters, he's talked about S-64's a little bit. But that was almost 20 years ago. I hear Erickson Skycrane has one at Tillamook Oregon, but that's all i can remember about it.
So i don't have much to share with you, sorry.
Buzz Fuselsausage: Line Mechanic by night, DC-3 Crew Chief by choice.
Posts: 6
Joined: Sun May 24, 2015 7:00 pm

RE: Sikorsky S64

Tue Jan 23, 2001 11:45 pm

Thank you !
Any information will come in handy. Today I asked P&W rep to give me any data regarding P&W JT 12. He said that it was a military one so no one would be sharing with closed data. Is it true?
Posts: 254
Joined: Sun Jul 09, 2000 10:44 am

RE: Sikorsky S64

Sun Jan 28, 2001 2:45 pm

It developes 4,800 Shaft Horespower. Total on the crane is 9,600. The transmission gearbox actuallt generates 7,500. I'm not sure if you want some facts on the 64, but it's a civil version of the CH-54. the 64F is the CH-54B. They are 88ft. long. The Skycrane can pick 25,000lbs on a normal day, but one (now here in Alaska) picked up a tank filled with cement, weighing in at 40,170lbs! A Skycrane (the same one) has beaten an F-4 to 10,000ft, and has made it to 37,000ft in a vertical accent. The clearence under the body is 9ft, 6in. IT has a four point hook saystem for lifting paletized cargo. The rep. at Pratt probably would'nt give any info because the engine was originally going to be used on a fighter, but was later reenginered for torque rather than thrust, and mounted on the Skycrane. Erickson currently operates 25. Some are used for firefighting, where they can haul up to 3,000gal. of water. Hope this helps. If you want more, feel free to ask.

Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

Don't Let The Pratt Rep. Fool You

Mon Jan 29, 2001 7:55 pm

Hi Evengy, Buzz here. That Pratt repesentative was probably more lost than you and didn't want to admit it. It's not a new engine, so he might not know his history. I found that out when i started asking Pratt+Whitney about Radial Engines: they throw out all of the old information, it's a legal liability.
The US Army was getting rid of the S-64's after Vietnam, so they are civilian now. It's an old engine design, nothing on it is a military secret anymore. If i recall it started life as a little business jet engine (J-12) and then they made a bigger turbine and gearbox to go with it.
So, i'd ask the Pratt guy again, and again until he does his homework.
Why not type in www.amtonline.com and see if you can find a shop that repairs helicopter engines. Maybe they'll be willing to answer your questions.
Good Luck!
Buzz Fuselsausage, Line Mechanic by night, DC-3 Crew Chief by choice.

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