VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 11-11-2018, 10:22 AM
Hartstoc's Avatar
Hartstoc Hartstoc is offline
 
Join Date: Aug 2017
Location: Sebastopol,CA
Posts: 145
Default KTS or SMPH?

Iíve been flying for almost 40 years but have never gotten completely comfortable with the prospect of mentally jumping back and forth between knots and miles per hour. My preference has been to configure everthing in my homebuilts in statute miles per hour. Intrinsically simpler, direct crossover from driving, ego boost of bigger numbers, and so on.

Now Iím installing an all-Garmin IFR panel in my 7A- 10Ē G3X Touch, G5 backup, GTN 750, 507 autopilot with Garmin servos, GTX345, GNS245 panel mount, and assorted remote devices. I plan on regaining currency of my long held but little used IFR rating and getting very comfortable with all the precision GPS proceedures coming available.

With this fresh start, I have to decide between configuring this whole package in KTS or MPH. Any thoughts or opinions from seasoned IFR RV flyers out there would be appreciated. I appreciate that ATC speaks KTS, so pretty much anticipate a lot of sentiment toward that choice, but still curious what others have to say. Thanks in advance- Otis
__________________
Otis Holt-
RV-7A (bought)
Built Monnett Moni
Frmr Test Pilot/Author CAFE APR's:
RV-8A, S-7C, Europa, Glastar.
-2018 VAF donation!!-
"RV-Fun is inversely proportional to RV-Weight!"
Reply With Quote
  #2  
Old 11-11-2018, 10:41 AM
flyinga flyinga is offline
 
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 531
Default

Real airplanes use knots.

Which is more useful, one minute of latitude (nautical mile) or a thousand paces of the average Roman soldier (later defined by queen Mary)?
__________________
Jim Averett
RV-8
TS36 - Silver Wings
Fredericksburg, TX
Reply With Quote
  #3  
Old 11-11-2018, 10:45 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,616
Default

On my RV-3B project, I'm trying to keep as much as possible common with my C180. Besides manual flaps and the flap speed, I'm using mph, to match. So for that reason alone I'm using that unit.

Besides, knots are nautical miles per hour, and these things ain't boats.

Dave
Reply With Quote
  #4  
Old 11-11-2018, 10:55 AM
RVbySDI's Avatar
RVbySDI RVbySDI is offline
 
Join Date: May 2005
Location: Tuttle, Oklahoma
Posts: 2,498
Default

Quote:
Originally Posted by flyinga View Post
Real airplanes use knots.

Which is more useful, one minute of latitude (nautical mile) or a thousand paces of the average Roman soldier (later defined by queen Mary)?
Hmmmm, given this concept, what is more useful?

1 Kilometer = 1000 meters
1 Meter = one/ten-millionth of the distance from the equator to the north pole along a meridian through Paris, France
OR
1 Mile = 5280 feet
1 Foot = the average size of that above mentioned Roman soldier's foot!
__________________
RVBYSDI
Steve
RV9A
https://rvwings.com

Live Long And Prosper! 🖖🏻

Last edited by RVbySDI : 11-11-2018 at 10:59 AM.
Reply With Quote
  #5  
Old 11-11-2018, 10:57 AM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
 
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 14,381
Default

Quote:
Originally Posted by Hartstoc View Post
Iíve been flying for almost 40 years but have never gotten completely comfortable with the prospect of mentally jumping back and forth between knots and miles per hour. My preference has been to configure everthing in my homebuilts in statute miles per hour. Intrinsically simpler, direct crossover from driving, ego boost of bigger numbers, and so on.

Thanks in advance- Otis
Yep, for those of us who started flying back in the dark ages, and never went beyond the basic private ticket, MPH is pretty common.

The new S 21 will be in MPH
__________________
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Reply With Quote
  #6  
Old 11-11-2018, 11:09 AM
kbalch's Avatar
kbalch kbalch is offline
 
Join Date: Jan 2005
Location: Clermont, FL
Posts: 174
Default

I started flying in MPH, then transitioned to KTS when I got my instrument ticket. After 20+ years thinking in knots, it's become second nature. A plane marked solely in MPH is a VFR-only bird for me.
__________________
Ken

RV-8 N118KB (sold)
RV-14A #140494 (Fuselage underway)
N114KB (reserved)
Reply With Quote
  #7  
Old 11-11-2018, 11:17 AM
DaleB's Avatar
DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 1,922
Default

Quote:
Originally Posted by flyinga View Post
Real airplanes use knots.

Which is more useful, one minute of latitude (nautical mile) or a thousand paces of the average Roman soldier (later defined by queen Mary)?
Neither?

Having said that, I use knots in the airplane. I do rough conversions for passengers if needed, otherwise I don't worry about it. If I need the exact numbers for some reason or other, it's easy enough to do the math even if I don't have a calculator handy (which is really, really rare).
__________________
Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
-=VAF=- 2017 dues paid
Reply With Quote
  #8  
Old 11-11-2018, 11:23 AM
rocketman1988 rocketman1988 is online now
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 1,194
Default Knots

Knots makes the mental math easier...

MPH is just annoying...
__________________
Bob
Aerospace Engineer '88

RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
Doors - Done
On Gear
290 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...

Dues Paid 2018,...Thanks DR+
Reply With Quote
  #9  
Old 11-11-2018, 11:23 AM
flyinga flyinga is offline
 
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 531
Default

Actually, in the days of sectionals (remember those?), the latitude minute ticks could be used as a reference for nautical miles.
__________________
Jim Averett
RV-8
TS36 - Silver Wings
Fredericksburg, TX
Reply With Quote
  #10  
Old 11-11-2018, 11:51 AM
Hartstoc's Avatar
Hartstoc Hartstoc is offline
 
Join Date: Aug 2017
Location: Sebastopol,CA
Posts: 145
Default

Quote:
Originally Posted by flyinga View Post
Real airplanes use knots.

Which is more useful, one minute of latitude (nautical mile) or a thousand paces of the average Roman soldier (later defined by queen Mary)?
Very well put!
__________________
Otis Holt-
RV-7A (bought)
Built Monnett Moni
Frmr Test Pilot/Author CAFE APR's:
RV-8A, S-7C, Europa, Glastar.
-2018 VAF donation!!-
"RV-Fun is inversely proportional to RV-Weight!"
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 12:15 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.