Talk:E6B

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i just stumbled across this, uplifting story about this page: http://blog.wirelizard.ca/pivot/entry.php?id=43 —Preceding unsigned comment added by 82.143.235.237 (talk) 10:08, 5 November 2007 (UTC)

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

Contents 1 Math 2 WCA and Ground Speed Math 3 Correction... 4 Copyright? 5 Conflict of interest 6 MB-4A

[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

• i concur with this. the equation, as listed now, does not give the wind correction angle. it should be sin(windDir - trueCourse), or same as what was mentioned above - a sign flip is necessary

[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

[edit] Copyright?

Does anyone hold the copyright or patent for the E-6B style flight computer? (ie, a transparent rotating slider over concentric circles on one side with a logarithmic circular slide rule on the other) Sancho McCann 02:14, 23 December 2006 (UTC)

I see that the article answers my question!.... Good article! Sancho McCann 02:17, 23 December 2006 (UTC)

[edit] Conflict of interest

I just wanted to disclose that the link that I added a few months ago to the online e-6b applet was a link to my own website. I didn't realize at the time that this is not appropriate. So, I would like to open discussion as regards the appropriateness of this link. I believe it improves the article by allowing a reader to interact with a simulated E-6B. As regards the conflict of interest, it is not a monetary interest, as the website is a university website and the E-6B software is released under the GPL. Sancho 06:49, 11 April 2007 (UTC)

Your link is fine and appropriate to the article in my opinion and is not COI. But you may want to fix the link in the article so it does not lead to a redirect page. Russeasby 20:10, 13 April 2007 (UTC)

Okay, thanks! Sancho 07:49, 15 April 2007 (UTC)

[edit] MB-4A

The model given to USAF Navigators has MB-4A stamped on the top, contra this article.--72.191.31.112 (talk) 04:46, 10 January 2008 (UTC)

I am the person who wrote up the majority of the history. As noted in the article, a later designation starting in the early 1950s was MB-4. It, and CPU-26, have been used since then. - Kevin Darling (talk) 02:25, 13 May 2008 (UTC)