2001-03-13
So, did you collect your data and produce your power curve in SI units?
John
Keiner ist hoffnungsloser versklavt als derjenige, der irrtümlich glaubt
frei zu sein.
There are none more hopelessly enslaved then those who falsely believe they
are free!
----- Original Message -----
From: "James R. Frysinger" <[EMAIL PROTECTED]>
To: "U.S. Metric Association" <[EMAIL PROTECTED]>
Sent: Tuesday, 2001-03-13 23:20
Subject: [USMA:11593] Re: What is bhp
> That's one of the measurements we took on our submarine, the USS
> Richard B. Russell, on its first sea trials. A temporary torsionometer
> was installed on the shaft (I have no idea how it worked) and the Navy
> collected data on torque (from torsion measurements) as a function of
> angular velocity. This produced the "power curve", a baseline bit of
> data collected for each ship. Fascinating experience in that I was the
> Engineering Officer of the Watch and had Admiral Rickover sitting next
> to me.
>
> Under his direction, we *carefully* raised the engines' speed which
> brought the reactor a tiny bit above the specified operating limits (we
> were submerged far from land and had some extra nuclear instrumentation
> installed). At each step, Rickover's engineers showed him the data and
> calculations and he would tell me to "add another turn". Finally, he
> was satisfied and directed me to bring reactor power down to "100%". He
> also decided and announced our limit on propulsion shaft speed. Once I
> was there he said that if I ever exceeded that 100% reactor limit again
> (in steady state operations) or the maximum allowed turns (per minute)
> on the shaft he would bust me to a level below that ever held by any
> sailor in the Navy's 200 year history. Yes, I took the reactor "into
> the red" on that day and on purpose -- but never again.
>
> Jim
>
> On Tuesday 13 March 2001 2053, Joseph B. Reid wrote:
> > Bill Potts wrote in USMA 11583:
> >
> > Specifically, the pony brake measured torque.
> >
> >
> > To get the power from prony brake measurement one must also measure
> > the number of revolutions per minute or per second.second.
> >
> > Joseph B. Reid
> > 17 Glebe Road West
> > Toronto M5P 1C8 Tel. 416 486-6071
>
> --
> James R. Frysinger University/College of Charleston
> 10 Captiva Row Dept. of Physics and Astronomy
> Charleston, SC 29407 66 George Street
> 843.225.0805 Charleston, SC 29424
> http://www.cofc.edu/~frysingj [EMAIL PROTECTED]
> Cert. Adv. Metrication Specialist 843.953.7644
>
