SSN 614 Greenling from Thor Sturgeon Hull

[mlshaker]

I looking to built the SSN 614 Greenling (my uncle served on it). From what I found out even though its a Permit class sub its hull is longer just like the Sturgeon class. I was wondering since I can't find any hull lines if I could use a Thor Design Sturgeon hull with a Permit class sail. Any ideas.

Jim

[PaulC]

Hi Jim,

You're going to have

Hi Jim,

You're going to have to do a little more research on this one. The Permit sails were different in the later boats as well. They were thicker and a little taller I believe. You'd have to modify or use Permit stern plane appendages too because they didn't have the Sturgeon's vertical end pieces (except for Barb).

Jim Christley wrote several articles going over the differences between the boats within classes several years ago in the Report. Steve Reichmuth's "director's cut" of his static Permit buildup article would be a good starting point as he spends some time discussing the Permit's development leading into the Sturgeons. I'd tell you which issues they were but I don't have the info at my disposal presently.

The neat thing about all these mods is once you finish you should have a pretty unique model as SSNs go.

[ssn22]

Paul, your correct

From FAS] were

Paul, your correct

From FAS] were modified during construction to incorporate lessons learned from the loss of the Thresher. Fitted with heavier machinery and a larger sail, they were ten feet longer than the other units of the class to correct stability problems caused by weight growth.

The Total Length Grew from 278 Feet to 292 Feet.

The Jack's length is stated at 297 Feet, does any one know how this boat was lengthened?

John

[stevel14]

Hi,

She was longer because she

Hi,

She was longer because she was an experiment with contra-rotating screws. The extra length was a result of the distance between the two screws and also to provide space for the extra machinery needed. From what I have read, although she was a front-line boat, the contra-rotating screws were not very successful and were not an improvement over the other boats in the class, which is why the Navy never developed contra-rotating screws further. She apparently also had a history of machinery/engine troubles.

Steve Laubmeier
#2442