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FG E6B Computer, maybe??

Canvas is FlightGear's new fully scriptable 2D drawing system that will allow you to easily create new instruments, HUDs and even GUI dialogs and custom GUI widgets, without having to write C++ code and without having to rebuild FlightGear.

FG E6B Computer, maybe??

Postby wookierabbit » Thu Feb 03, 2011 1:07 am

Is it possible for anyone here to design a workable and rotatable E6B computer in FG? Not a number cruncher emulator, but an actual interactive FG integrated E6B computer. I'll keep it short, sweet, and to the point for now.

Ex: Go to FG menubar>select Equipment tab>select E6B tab, and WALA! An interactive E6B. :)

So, can it possibly be done?
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Re: FG E6B Computer, maybe??

Postby Johan G » Thu Feb 03, 2011 5:40 pm

I actually do have my very own circular slide rule that I made myself (including making the scales). 8) Getting there took about two years, with a few several moths long breaks when I got stuck. It's not an E6B though.

For an E6B, or a CR for that matter, I would also have to include at least wind calculations, altitude and air speed corrections. It would also be nice to include calculation of Mach number and compressability correction. The maths and physics involved is unfortunately out of my grasp. :(

Here's a picture of the one I have in a leg pocket every day. I maybe use it once or twice a week, though I do have problems with the orders of magnitude:
Image
Front side of the third disc by Johan G, on Flickr


If an interactive E6B in FlightGear can be done? Of course it can be done! :D The tricky thing is to either make the scales from scratch or to copy one without violating copyright or licenses. :?
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Re: FG E6B Computer, maybe??

Postby wookierabbit » Thu Feb 03, 2011 8:07 pm

Glad to hear it is possible to be done. :)

If only I had the time to gain some development knowledge, I would have done so myself.
But in this case, all I can do now is hope and pray some willing and innovative thinker comes along and takes up the challenge.
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Re: FG E6B Computer, maybe??

Postby MAKG » Fri Feb 04, 2011 8:49 pm

Like much in FG, real world tools can substitute. I routinely use real FLIPbooks, real WACs and real TACs.

A real E6B can be found at your favorite pilot shop, or from Sporty's for $13.

http://www.sportys.com/PilotShop/product/12654
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Re: FG E6B Computer, maybe??

Postby AndersG » Fri Feb 04, 2011 9:08 pm

Alternatively you could build a paper one :)
http://www.ben.com/flying/e6b/

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Re: FG E6B Computer, maybe??

Postby Johan G » Fri Feb 04, 2011 11:01 pm

AndersG wrote in Fri Feb 04, 2011 9:08 pm:Alternatively you could build a paper one :)
http://www.ben.com/flying/e6b/


Nah, that's just another circular slide rule, like the one in my pocket. :wink: What one would need in addition to multiplication :wink: is at least conversion between CAS and IAS (or TAS and IAS).

What I use most often on my Jeppesen CR-3 (a circular equivalent to the E6B) is TAS --> IAS conversion and wind calculations while planning VFR circuits. That simply can not be done on a regular circular slide rule.
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Re: FG E6B Computer, maybe??

Postby Johan G » Sat May 10, 2014 2:11 am

Necrobump! Just could not resist. :roll: :wink:

For future reference, one of the classical E6-B models, not called that at all but instead CPU-26A/P, is of course standardised and in detail down to the placement of each tick (literally).

Anyone interested can get the specs at EverySpec (good place to look for instrument drawings and specs as well):

The specification is not fully 100% readable though, due to the scanning I guess.
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Re: FG E6B Computer, maybe??

Postby Hooray » Sat May 10, 2014 9:26 am

wookierabbit wrote in Thu Feb 03, 2011 1:07 am:Is it possible for anyone here to design a workable and rotatable E6B computer in FG? Not a number cruncher emulator, but an actual interactive FG integrated E6B computer. I'll keep it short, sweet, and to the point for now.

Ex: Go to FG menubar>select Equipment tab>select E6B tab, and WALA! An interactive E6B. :)

So, can it possibly be done?



we only need a vector/svg image of an E6B, which could be turned into a dynamic dialog within a single weekend using just Nasal & Canvas, here's a related topic:

Subject: Auto protractor?

Hooray wrote:Hi & welcome!

That should be possible to do without touching any C++ code, and without rebuilding the binary.
You really just need to use Nasal/Canvas for this, and could make it a part of MapStructure:

http://wiki.flightgear.org/MapStructure
Image

Image

These images are created and animated entirely from scripting space (Nasal). You can simply load SVG or raster images and place them on the map, and animate/scale/transform them, and even respond to events (mouse clicks etc)
Please don't send support requests by PM, instead post your questions on the forum so that all users can contribute and benefit
Thanks & all the best,
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Re: FG E6B Computer, maybe??

Postby Kabuki » Sat May 10, 2014 3:58 pm

Hehe, another 'butterbox' project. A sophisticated electronic digital computer running a simulation of a mechanical analog calculator.

Savor the irony! :)
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