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View Poll Results: Do you use Knots , MPH, or Kilometers To Describe Your Speed?
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I use Knots.
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279 |
74.20% |
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I use MPH
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93 |
24.73% |
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I use kilometers per hour.
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4 |
1.06% |

01-28-2012, 05:06 PM
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Join Date: Jul 2009
Location: Bonney Lake, WA
Posts: 295
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Quote:
Originally Posted by Mike S
Yeah, what Larry said.
Soon as they start marking maps with knots to show distance from place to place, then it will make sense to use them.
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Sort of like an aviation chart with nautical miles shown between stations? I guess it makes sense to use knots then.
__________________
Ryan Winslow
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01-28-2012, 05:15 PM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Knots for speed because that how the ASI reads and what ATC uses to tell me what the wind is doing, feet for altitude, litres for fuel (we're in Australia), millibars for atmospheric pressure, psi for tire (tyre) pressure, miles for distance (should be kilometres), deg centigrade for air temperature, deg fahrenheit for the engine, etc ....
Aviation must win the prize for the most bizarre set of units of measurement ever devised 
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rgmwa
RV-12LR 912ULS
120346
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01-28-2012, 05:17 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by Mike S
Yeah, what Larry said.
Soon as they start marking maps with knots to show distance from place to place, then it will make sense to use them.
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Seriously? I did not know that!  When was the last time anyone used a paper map? Do they still make them? 
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
Last edited by Geico266 : 01-28-2012 at 05:21 PM.
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01-28-2012, 05:19 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by gbrasch
Real pilots use knots............ 
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Yes, I agree, to tie down the plane. 
__________________
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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01-28-2012, 05:23 PM
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Join Date: Aug 2007
Location: Wichita Falls, TX
Posts: 2,182
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Hybrid knots and MPH. I always refer to groundspeed in knots, and airspeed in MPH. I learned to fly in Cessnas which had MPH on their ASIs. My Cherokee that I flew for 10 years was also in MPH. Every taildragger I flew (C140, Cub, Supercub, Citabria) and learned tailwheel flying, was also in MPH. The RV-4 that I really learned how to fly RVs in, was also in MPH. My friend's RV-8 that I currently fly has a Dynon D-100, which makes it easy to change back and forth, is generally always left in MPH because the owner prefers it that way too. I've just gotten accustomed to learning all the airspeed numbers in MPH and old habits are hard to break. The RV-6 I'm looking to buy has steam gauges, and its ASI is in knots, so I guess I'll just have to learn a new set of numbers if I do end up buying that plane.
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Neal Howard
Airplaneless once again...
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01-28-2012, 05:23 PM
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Join Date: Sep 2010
Location: Charlotte NC
Posts: 1,167
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The ATC system uses knots. That is good enough for me. It makes things nice and simple when they assign you a speed or ask your speed.
George
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01-28-2012, 05:24 PM
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Join Date: Mar 2006
Location: Gilbert, AZ
Posts: 1,628
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The military use knots. The airlines use knots. ATC uses knots. Team RV uses knots.
You can use furlongs per fortnight in your own airplane. Use knots only if you want to fit in.
__________________
Ron Schreck
IAC National Judge
RV-8, "Miss Izzy", 2250 Hours - Sold
VAF 2021 Donor
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01-28-2012, 05:28 PM
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Join Date: Apr 2008
Location: Davenport, IA
Posts: 1,390
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Quote:
Originally Posted by ronschreck
The military use knots. The airlines use knots. ATC uses knots. Team RV uses knots.
You can use furlongs per fortnight in your own airplane. Use knots only if you want to fit in.
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And, only the vain use MPH, cause they want to see a higher speed. lol!!   
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01-28-2012, 05:29 PM
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Join Date: Jan 2005
Location: Atlanta, GA
Posts: 2,295
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Virtually every single reference to speed and distance in every aeronautical document, chart, sectional, AIM, FAR, not to mention every controller uses nautical miles.
It's the unit for the system. Anything else is just for bragging rights.
__________________
"What kind of man would live where there is no daring? I don't believe in taking foolish chances but nothing can be accomplished without taking any chance at all." - Charles A. Lindbergh
Jamie | RV-7A First Flight: 7/27/2007 (Sold)
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01-28-2012, 05:33 PM
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Join Date: Oct 2005
Location: Chicago sw suburbs
Posts: 395
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I use mph when bragging about the speed of my 6 to my nonaviator friends just so I don't have to explain the difference between mph and knots to them but use knots when with my aviator friends and talking to atc. And even they ask me mph or knots? May be easier to use mach. "I was cruising along at .23,..." sounds good.
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Jim Woolard C56
N9855J RV-6 Donated 2020
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