Welcome Guest. Sign in or Signup

5 Answers

E6B TAS above 260 kt – wind triangle – WCA etc.

Asked by: 2816 views
Commercial Pilot, Private Pilot, Student Pilot

Hello,

 

can anyone tell me how to work with the E6B with TAS above 260 kt on the back side?

For example a wind triangle/WCA hast to be calculated and a data with 465 TAS, but the E6B just show until 260 kt.

Is there a way to work out this with the E6B or is the E6B not suitable above 260 kt ?

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.

5 Answers

  1. Best Answer


    Russ Roslewski on Apr 22, 2018

    I imagine you could just divide all speeds by the same number (like, 5 – whatever gets the speeds into the right range for the plotter) and work it that way.

    So, TAS/5
    Wind speed/5

    Get the result, then multiply by 5.

    I don’t see why that wouldn’t work.

    Try it then compare your answer with an electronic E6B and you’ll know.

    0 Votes Thumb up 0 Votes Thumb down 0 Votes



  2. KDS on Apr 23, 2018

    When speed gets up that high, the error factor due to compressibility becomes greater.

    The E-6B design predates WW II when speeds in that range were not considered.

    0 Votes Thumb up 0 Votes Thumb down 0 Votes



  3. Russ Roslewski on Apr 23, 2018

    But those errors occur before the conversion to TAS – so, once the OP has determined the TAS, the E6B should work fine. It’s then down to a matter of scaling, and geometry.

    0 Votes Thumb up 0 Votes Thumb down 0 Votes



  4. ChrisFly on Apr 23, 2018

    @ Russ Roslewski
    works indeed.
    How you said it comes down to a matter of scaling.

    0 Votes Thumb up 0 Votes Thumb down 0 Votes



  5. KDS on Apr 23, 2018

    Russ, you’re 100% correct. I thought he was asking about calculating TAS given IAS at higher speeds. The trigonometry does indeed remain the same proportionally if one already has the TAS as a given.

    0 Votes Thumb up 0 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.