Marcus, I agree there, I was just making sure that the non-pilots weren't led to think that m/s was unit du jour. I know you favor m/s position. I prefer the m/min (vertical) and km/h (horizontal). As I pointed out in [USMA:17613] Re: Wind speed on 2002-01-24 the public will not accept m/s for horizontal speed, km/h will win the day there.
Whatever teh aviation community moves to would need to be practical for everyday use, not just for the purist. Horizontal and vertical speeds to be easily correlated. As you said, pilots love 'rules of thumb'. As for the 1000, 2000 'rules' or the the 3,500 on occasion then it becomes 'it depends'. As you know, it depends on the type of a/c. there's a vast difference between a Cessna 172 and a jet. A jet can easily handle 3,500 ft/min, it also pressurized, but as an Instructor Pilot the cicumstances would dictate as to whether I would allow a pilot to use a descent rate of this magnitude. At FL350 this is not a problem but if someone does this close to terra firma then you can bet I'll be having stern words. Some commercial pilots in the US sometimes get over zealous in co-operating with ATC. In a busy environment it is very common to be requested to 'expedite' descents (not as common for climb though). ATC knows the performance characteristics of an a/c and if you are flying a jet they assume they can slam dunk you at will. There is also my favorite from ATC: a tight turn just outside the ILS gate, slam dunk, and a request to keep the speed up. One complies if it safe to do so and one is well ahead of the aircraft and has total positional awareness otherwise one declines the request and joyfully accepts the sin-bin vector. cheers baron carter -----Original Message----- From: Ma Be [mailto:[EMAIL PROTECTED]] Sent: Thursday, 18 July, 2002 14:12 To: U.S. Metric Association Subject: [USMA:21239] Re: Unit for Speed 'Course, Baron, I realize that (we actually have some "nice" figures as rules of thumb when it comes to working with ft/min, like 1000 being the... "standard" or desired value to use when following procedures, 2000 being the most extreme one would go - but, quite frankly, commercial pilots don't always follow these "common sense", "academy" 'rules'... ;-) I've seen them doing even 3500!!! on many an occasion...). However, please note that my comment was in view of the discussion for a *new* parameter or format. In that sense I have to favor the purest possible value, right?... And, for rules of thumb, one would work with 5 m/s as a new "standard". An interesting situation would be to rework all known flight parameters we pilots would have to accustom to IF we also changed our watches and arc angles... But this would be the subject of another discussion, he, he... :-) Marcus On Thu, 18 Jul 2002 14:01:14 Carter, Baron wrote: >marcus, > >m/s may be your preference but as you know the aviation community uses >ft/min. > >baron carter >CFI,CFII,MEI > >-----Original Message----- >From: Ma Be [mailto:[EMAIL PROTECTED]] >Sent: Thursday, 18 July, 2002 13:23 >To: U.S. Metric Association >Subject: [USMA:21230] Re: Unit for Speed > > >As a professional pilot I must also side with m/s (even over km/h). What >really matters to us is this rate of descent relationship vis-a-vis our >present flight level. Since I flatly reject the stupid ft crap in favor of >meters (evidently) then there should be no argumentation about which format >this ratio should be presented as: m/s, and ONLY so! (There is >unfortunately very little relevancy that would be attached to km/h *in this >particular case*) > >Marcus > >On Wed, 17 Jul 2002 19:33:50 > Gene Mechtly wrote: >>On Wed, 17 Jul 2002, Carl Sorenson wrote: >>> ... >>> With digital readouts on dashboards now, it would be easy to include the >>> option of m/s. I wouldn't mind the option of seeing speed in m/s, but I >>> wouldn't use it all the time. >> >>On those two statement, we are now in complete agreement Carl. >> >>Gene. >> >> > > >Is your boss reading your email? ....Probably >Keep your messages private by using Lycos Mail. >Sign up today at http://mail.lycos.com > Is your boss reading your email? ....Probably Keep your messages private by using Lycos Mail. Sign up today at http://mail.lycos.com
