Attention all registered users. The new forum upgrade requires you to reset your password as you logon for the first time.
To reset your password choose this option that is displayed when you attempted to login with your username: "Forgotten your password? Click here!"
You will be sent an e-mail to the address that is associated with your forum account. Follow the simple directions to reset your password.
If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
[color=#000000]HAHAHAHA.
You know it's possible we are all right with our info. Think about this, you had five shipyards pumping out fleet boats at an alarming rate. My company, Electric Boat, was launching one a month. Maybe (and I'm no expert on props) you also had this same situation with many venders that made the props. Example]
I think that Subfixer has hit the answer. There were at least half a dozen prop suppliers, and probably more. Then there were three main yards, building boats. In this environment variations of a couple of inches, in prop diameter, wouldn't be unlikely.
Because of production/maintenance requirements hub diameter would have to be fixed. As would the hole for the shaft and the mounting bolt holes. The nearest point of the hull, to the prop shaft, would dictate a maximum prop diameter.
The government requirement would be for a certain amount of power (water moved by the prop) at a given RPM. Blade configuration (dimensions) would be left to the engineers.
Assuming this was the case, a .2% variation in prop diameter would be well within expected differences.
Barring a copy, of a government contract for screws, stating a fixed diameter, I'll live with what we have.
Mike,
At the risk of sounding nit picky, there were five yards building boats. Portsmouth, Electric Boat, Manitowic, Cramp and Mare Island. The latter two did fall off early but were involved none the less.
Myself I'm going to use 2" props or as close to that I can find and call it good. Still looking for the hub diameter for you.
BTW, I've already deducted the points for spelling.
there were five yards building boats. Portsmouth, Electric Boat, Manitowic, Cramp and Mare Island.
I'd rate Cramp as really questionable in terms of building boats...maybe attempting to build would be a better description. Many of their boats had to be towed elsewhere to be finished. Their completed subs had a terrible reputation. One sank (IIRC, SS-29 Lancetfish) pierside before she even went out on patrol....
Hi Tom,
This is very true and thank God things turned out the way they did with Cramp. They were definately over their heads. Who knows what our overall losses would have been if they remained in the game.
Tweet
Comment