Talk:E6B

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You have new messages (last change).

OK - my first original WikiPedia page, ever, after a couple of months of lurking, making anon minor edits, and wondering if I had something to add to the aviation sections. Editing/categorization/etc welcomed!

Should re-direction pages be set up for all the variant spellings of E6B? There does not appear to be ANY standard spelling, so I'm not sure how to approach this. --Madpilot 01:37, 13 Mar 2005 (UTC)

Thank you for setting up the original page. Never thought about doing one here before, but it's a perfect repository for info on it.

If possible, the page needs to be titled E-6B, which is its true name, along with the other variations as references. I've spent a huge sum of money and time tracking down its history, and will be updating the page with it soon. -- Kevindarling

My first contribution to wikipedia, the front E6B pic -Dajackman

[edit] Math

I've just reformatted the provided equations so that they don't display as flat text anymore. Could the original author (if possible) or another Wikipedian familiar with the formula check my work and make sure I haven't made any glaring errors? --Yvh11a 13:44, 15 May 2006 (UTC)

I corrected the WCA equations. Groundspeed is weird, too. Please correct.

Ok, I corrected the GS equations, too. --64.254.245.130 19:27, 18 May 2006 (UTC)

I believe you need a negative sign before the WCA formula, and I think the GS formula should have a subtraction before the cosine term. I checked these using my real E-6B, and I think I'm right.

The last GS equation is indeed wrong. Sign error, is should read .... - 2 * B * D * .... instead.
For those interesting in the math: This comes directly out of the law of cosines. http://en.wikipedia.org/wiki/Law_of_cosines
--21:11, 28 August 2006 (UTC)Uffe

[edit] WCA and Ground Speed Math

Hi,

I'm sure that there should be a minus-sign in front of the sin-1 calculation. That would really calculate the WCA. The formula as it is stated right now calculates the Drift.

And I'm wondering about the GS calculation. I think it should read the formula mentioned in http://e6b.quickseek.com?

The current GS formula on this Wiki doesn't even come close to the right GS when using

Track=64 TAS=104 W/V=180/22

(should be about 112)

Regards! Arjan

[edit] Correction...

Correction on the things I say above: both formula's come up with about the same GS.

But when using "B sqrt(1-(D sin(A-C) / B)2) - D cos(A-C)" it comes up with 111,7471031 (=112)

When using the formula stated here, it comes up with 111,0764888 (=111)

Can anybody explain the differences between the two formulas? And which is the correct one? :-)

Regards! Arjan

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