Welcome Guest. Sign in or Signup

1 Answers

Additional considerations, POH / instruments in MPH vs Knots?

Asked by: 3717 views
Aircraft Systems, General Aviation, Instrument Rating, Private Pilot, Student Pilot

What are some additional considerations / concenrs when flying an aircraft where all speeds are MPH vs Knots, range in miles not nautical miles, etc? Would that affect (increase load) while instrument training or flying in general? 

Ace Any FAA Written Test!
Actual FAA Questions / Free Lifetime Updates
The best explanations in the business
Fast, efficient study.
Pass Your Checkride With Confidence!
FAA Practical Test prep that reflects actual checkrides.
Any checkride: Airplane, Helicopter, Glider, etc.
Written and maintained by actual pilot examiners and master CFIs.
The World's Most Trusted eLogbook
Be Organized, Current, Professional, and Safe.
Highly customizable - for student pilots through pros.
Free Transition Service for users of other eLogs.
Our sincere thanks to pilots such as yourself who support AskACFI while helping themselves by using the awesome PC, Mac, iPhone/iPad, and Android aviation apps of our sponsors.

1 Answers



  1. Chris Carlson on Feb 21, 2013

    I would say yes. It would be a simple conversion that can be done on an e6b in less than 2 seconds, but something that will be annoying over time. Cross country planning will have to be converted for wind information and charted info is all based on the nautical mile. Instrument approaches are measured in nm and have speed information in knots. For general vfr flight where there isn’t much in the way of planning, it would not be a problem. But I would not say that it will increase workload. The cockpit, because most of the number crunching would be something done before a flight (cross country calculations, approach speed for localized timing). If it is a matter of 5 dollars difference in an aircraft rental, spend the extra cash, but if its a 500 dollar or more avionics upgrade, it’s not too difficult to crunch some easy math. 1 nautical mile is equal to 1.15 statue miles.

    +2 Votes Thumb up 2 Votes Thumb down 0 Votes


The following terms have been auto-detected the question above and any answers or discussion provided. Click on a term to see its definition from the Dauntless Aviation JargonBuster Glossary.

Answer Question

Our sincere thanks to all who contribute constructively to this forum in answering flight training questions. If you are a flight instructor or represent a flight school / FBO offering flight instruction, you are welcome to include links to your site and related contact information as it pertains to offering local flight instruction in a specific geographic area. Additionally, direct links to FAA and related official government sources of information are welcome. However we thank you for your understanding that links to other sites or text that may be construed as explicit or implicit advertising of other business, sites, or goods/services are not permitted even if such links nominally are relevant to the question asked.