---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Wed 06/27/07: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:33 PM - JUST MY POINT (Fergus Kyle) 2. 04:21 PM - Re: JUST MY POINT (Noel Loveys) 3. 06:08 PM - Re: JUST MY POINT (Randy L. Thwing) 4. 07:43 PM - Re: JUST MY POINT (Fiveonepw@aol.com) 5. 07:46 PM - Re: JUST MY POINT (Fiveonepw@aol.com) ________________________________ Message 1 _____________________________________ Time: 12:33:02 PM PST US From: "Fergus Kyle" Subject: Engines-List: JUST MY POINT Hello, The recent spate of calculations and replies, regarding the simplest of arithmetic seems to have escaped the purpose of my original statement - that the simpler the calc, the more times you do it to confirm. Simple sums involve rather more mental assumptions as a way to to achieve the end. It's theses assumptions that often obscure the accuracy. Whether brackets are mandatory or optional is of no consequence to my proiposal. Take Centigrade (Celsius) double it, subtract ten percent and add 32, Then do it again. Or do it another way: take ninety percent of double Celsius and add 32. Watch out for minusses though: -40C; -80C; -80C-(-8) is -72; -72+32; -40F The extra security is acquiring the same answer twice................ Ferg ________________________________ Message 2 _____________________________________ Time: 04:21:15 PM PST US From: "Noel Loveys" Subject: RE: Engines-List: JUST MY POINT How things change! When I was in school, about ten million years ago, We were told the answer wasn't important but how we got it was. As a result only about 5% of the answer on any math problem was attributed to actually getting the right answer. Now days, no one, especially myself, gives a fiddlers d#$% about how the correct answer is achieved, only that it is the correct answer. For most problems though a calculation is good enough for government work. I don't think any one really cares if a mile is 1.61 kilometres or one nautical mile is 1.15 mi ( I had to get out the old whiz wheel to check that one). Its easy to do a one and two-thirds or a 1.1X calculation, pardon the expression, on the fly. That's my story and I'm sticking to it....... Unless suitably bribed of course. Noel > -----Original Message----- > From: owner-engines-list-server@matronics.com > [mailto:owner-engines-list-server@matronics.com] On Behalf Of > Fergus Kyle > Sent: Wednesday, June 27, 2007 5:02 PM > To: engines > Subject: Engines-List: JUST MY POINT > > > > Hello, > The recent spate of calculations and replies, regarding > the simplest > of arithmetic seems to have escaped the purpose of my > original statement - > that the simpler the calc, the more times you do it to confirm. > Simple sums involve rather more mental assumptions as a > way to to > achieve the end. It's theses assumptions that often obscure > the accuracy. > Whether brackets are mandatory or optional is of no consequence to my > proiposal. > Take Centigrade (Celsius) double it, subtract ten > percent and add > 32, Then do it again. Or do it another way: take ninety > percent of double > Celsius and add 32. Watch out for minusses though: -40C; > -80C; -80C-(-8) is > -72; -72+32; -40F > The extra security is acquiring the same answer > twice................ > Ferg > > > > > > > ________________________________ Message 3 _____________________________________ Time: 06:08:13 PM PST US From: "Randy L. Thwing" Subject: Re: Engines-List: JUST MY POINT I'm stunned at the language some of you listers use, please use civil & correct language. The correct term on a aviation list is: "A flying fiddlers d#$%" Please watch this in the future, Best Regards, Randy, Las Vegas DO NOT ARCHIVE Engines-List message posted by: "Noel Loveys" > > How things change! > > Now days, no one, especially myself, gives a fiddlers d#$% about how the > Noel ________________________________ Message 4 _____________________________________ Time: 07:43:42 PM PST US From: Fiveonepw@aol.com Subject: Re: Engines-List: JUST MY POINT In a message dated 6/27/2007 6:22:32 PM Central Daylight Time, noelloveys@yahoo.ca writes: How things change! >>> Wow! All this cipherin!- I just keep a 4x5" laminated card in the glovebox in my plane with columns of C-F conversions on one side and mph/kts on the other- made 'er m'self on Excel. MUCH easier for the math-challenged and guaranteed correct! Mark do not archive ************************************** See what's free at http://www.aol.com. ________________________________ Message 5 _____________________________________ Time: 07:46:57 PM PST US From: Fiveonepw@aol.com Subject: Re: Engines-List: JUST MY POINT In a message dated 6/27/2007 8:09:14 PM Central Daylight Time, n4546v@mindspring.com writes: The correct term on a aviation list is: "a" aviation list?! ....... "_A_" aviation list??!!! I s'pose'n ya ment "this here" aviation list, dintcha? Mark do not archive ************************************** See what's free at http://www.aol.com. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message engines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Engines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/engines-list Browse Digests http://www.matronics.com/digest/engines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.