1980 in the Diaries

peter1234 wrote: are you guys talking about british standard? like the old triumph motorcycles?

Peter,
Yes, the BSW system. Most of what was produced in England was converted to our system during WWII for standardization. There were some in the auto, rail, motorcycle and aeronautics that held on until the late 70's. Rolls held on to the system until the mid 80's when they started to produce some newer design jets/turbines. One interesting twist to the WWII standardization is when Packard was building the Rolls Merlin engine over here. They actually re tooled and built the engines using the Whitworth system.

are you guys talking about british standard? like the old triumph motorcycles?

Josh,
Yes, as you found out, the Whitworth thread is based on a 55 degree thread angle and did use different thread pitches as well. The other difference is the hex head dimensions across the flats. Thet are real odd and usually in 1/64's! That's the reason for the Whitworth tools. Also interesting is the actual wrench sizing is based on the fastener diameter rather than the hex size. IE: if you have a 3/8" hex head cap screw, you pick the 3/8" wrench and not the 9/16"!!

Chris,
"old out of date BS stuff" are pretty strong words to use against your employer!! Of course, you've never been at a loss for words at anytime!

I fight with that every day. flavor of the month.

I cheated, but I learned a lot. Check out this article and let me know if it's what you are referring to. Bolt Science

"In November 1948 the Unified thread was agreed upon by the UK, the US and Canada to be used as the single standard for all countries using inch units. In 1965 the British Standards Institution issued a policy statement requesting that organisations should regard the BSW, BSF and BA threads as obsolescent. The first choice replacement for future designs was to be the ISO metric thread with the ISO inch (Unified) thread being the second choice. "

Probably why in the Marines, and at Rockwell Collins, we just use/d the part number called out for and never worried about specifics.

8122pbrainard wrote: Chris, I've been meaning to ask you if RR still uses Whitworth fasteners.

79nautique wrote: I haven't seen anything like that,

Chris,
Sounds like you don't know about the Whitworth fasterner system. Now, no cheating and using google or wiki! However, I will allow you to ask a older coworker who knows more than you do.

I haven't seen anything like that, UNJ series class 3 fit is pretty much standard across the board now.

I work at ROllS-ROYCE

thanks informative.. and def entertaining.. chris what exactly do you do . your job. projects you are working on?

IMO, if people were not willing to try something and take a risk, then we would all "be in the same boat". CC went out on a limb and built a boat / hull for other disciplines and look who's number one now in the wakeboard boat industry.

peter1234 wrote: what is a v drive conversion not a I/O and not a shaft like mine? whats the purpose and advantage disadvantage

Here is an example of a V-Drive conversion.

79nautique wrote: nothing like screwing up a good boat, good luck selling it one day, value goes to zero after the conversion. just not worth the time and effort to redo the stringers, relocate gas tank and destroy the boat's value, oh and the pylon sticking up like that really cool if your a tool I guess, but POS comes to mind for me. better use of space? being on top of each other now, guess they're midgets too. Butt ugly IMHO and a waiste of money that you'll never get back out of it.

I'm still a fan of good ol customization. There are many cars/boats that I've seen customized and appreciated, even if I would never do the same thing to my own property. Here is a perfect example of something I would never think of doing to my own boat. Camo Nautique

or George Barris turning a Corvette or a GTO into a station wagon...

Chris,

Tell us what you really think.