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10-02-2009, 12:56 AM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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Some quick answers.......
Quote:
Originally Posted by John Clark
It's not "twice as large" it is close to 1.6 times statute miles. So if your RV9 cruises at 200 KPH, you are only going a little over 124 statute MPH or 108 knots. Tell 'em 300, it is only a little exaggeration 
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John, what he meant was that knots is approx. twice as large as km/h and he is right! 1 NM = 1,852 km. I also tell people that my plane will fly 300 km/h when it is finished, because that is what they (non-pilots) can relate to. (I hope that "Bob's" speed mods will even get it bit over 300 km/hr)
Quote:
Originally Posted by N999BT
AND... we log time in 10ths of hours! 
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The hobs meters in the spam cans of our club are in hours and minutes, so I log minutes. At the end of the page, add all the minutes together and devide by 60, to get hours!
Quote:
Originally Posted by AlexPeterson
Ever wonder where the meter comes from? How about the Celsius scale? How about seconds? Both systems rely on arbitrarily assigned fundamentals.
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0 ?C = freezing point of water, 100 ?C = boiling point of water, simple!
If you like we can all switch to ?K (Kelvin)
Quote:
Originally Posted by rvmills
Or in my case, Celsius for Dummies.
There are some memory aids in the scale itself, so thought I'd pass them on to the bubbas here (and perhaps they are already well known, but what the hey. They are not exact, but close enough!):
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To be exact:
?F ==> ?C : Multiply by 1,8 and add 32
?C ==> ?F : Subtract 32 and devide by 1,8
BTW who is this Roger, that you are all talking about?
Regards, Tonny.
__________________
"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
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10-02-2009, 05:44 AM
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Join Date: Jan 2005
Location: Lake St. Louis, MO.
Posts: 2,346
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We don neeed no steenking standards
When I worked on the T-45 Goshawk program, a British design partially built and final assembly completed in St. Louis, we workers had to shift mental gears. This was reinforced with banners draped from the ceiling "THINK METRIC." Even nutplates, with their metric based hole spacing made the hardware not interchangeable with nutplates most of us are familiar with. Just a few feet away across the aisle, the American designed F/A-18 Hornet line was humming along quite happily thanks in part to its MEASURE of success, the decimal system.
If some governing body had the power to really impose a one world standard and that measuring standard not based upon American sensibilities, I'm sure the general reaction here at home will be met by the usual outrage and another record surge in gun sales.
Since when have all people everywhere universally agreed upon anything? Why Celsius? Why not? If we don't like it, rest assured somebody else loves it. Now, can we all just get along? 
__________________
Rick Galati
RV6A N307R"Darla!"
RV-8 N308R "LuLu"
EAA Technical Counselor
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10-02-2009, 06:41 AM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by ChiefPilot
After thinking about this a bit, I've decided I don't want to have such arbitrary units forced upon me. Therefore...
1. My altimeter shall be marked in fathoms.
2. My airspeed shall be calibrated in furlongs per fortnight.
3. I shall expect pressure settings to be read to me in atmospheres.
Who's with me?
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I'm in, as long as we can use the cubit somewhere. 
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
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10-02-2009, 06:42 AM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by John Clark
Lemme guess, we are all going to use Central Standard Time?
John Clark
RV8 N18U "Sunshine"
KSBA
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No, local time will do. I know where I am and where I'm going. 
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
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10-02-2009, 07:02 AM
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Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,861
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Knots origin
I seem to recall that the use of knots came from the fact that a nautical mile is equal to a minute of latitude, so traveling at 1 kt it would take an hour to travel 1 minute of Lat if the course was along a meridian (ie line of longitude).
__________________
Todd "I drink and know things" Stovall
PP ASEL-IA
RV-10 N728TT - Flying!
WAR EAGLE!
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10-02-2009, 07:15 AM
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Join Date: Jan 2005
Location: Lake St. Louis, MO.
Posts: 2,346
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Quote:
Originally Posted by Auburntsts
I seem to recall that the use of knots came from the fact that a nautical mile is equal to a minute of latitude, so traveling at 1 kt it would take an hour to travel 1 minute of Lat if the course was along a meridian (ie line of longitude).
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I seem to recall the term "knots" came about by sailors counting a series of equally spaced knots on a rope that was running through their fingers as it trailed behind the ship. The time for any given number of knots to be counted determined the speed of the vessel.
__________________
Rick Galati
RV6A N307R"Darla!"
RV-8 N308R "LuLu"
EAA Technical Counselor
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10-02-2009, 09:51 AM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
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Numb bers
Quote:
Originally Posted by ChiefPilot
2. My airspeed shall be calibrated in furlongs per fortnight.
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For those that care.
For an 180 hp RV7 (from the mother ship web site data):
Vso= 137,088 F/F (Furlongs/Fortnight)
75% cruise = 537600 F/F
Top speed = 564480 F/F
And I totally agree that the US measurement system is bad because I only get 16 oz in a US pint of beer instead of a proper 20 oz. 
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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10-02-2009, 12:08 PM
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Join Date: Jul 2009
Location: Longmont, CO
Posts: 236
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IIRC, a "femtoparsec" is about 100 yds - a useful unit of measurement 
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10-02-2009, 01:58 PM
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Join Date: Jan 2005
Location: Twin Cities, MN
Posts: 1,565
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Quote:
Originally Posted by rzbill
For those that care.
For an 180 hp RV7 (from the mother ship web site data):
Vso= 137,088 F/F (Furlongs/Fortnight)
75% cruise = 537600 F/F
Top speed = 564480 F/F
And I totally agree that the US measurement system is bad because I only get 16 oz in a US pint of beer instead of a proper 20 oz. 
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Awesome! If you dig telling folks your speed in MPH instead of kts now, you'll LOVE furlongs/fortnight.
Q: "How fast does it go?"
A: "In excess of 564,000!"

__________________
Brad Benson, Maplewood MN.
RV-6A N164BL, Flying since Nov 2012!
If you're not making mistakes, you're probably not making anything
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10-02-2009, 02:37 PM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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Mine to !
Quote:
Originally Posted by ChiefPilot
Q: "How fast does it go?"
A: "In excess of 564,000!"

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"Roger",...... Euhhh... who?.. 
__________________
"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
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