Clever Maths people - I need your help!

Elphaba · 04-19-19, 12:06 PM

This site:

http://46.101.125.20:8080

If you click on WIZARD it describes a Function / Equation that you need to enter to create a nomogram.

I'm trying to put together a PDF of a High resolution manoeuvring board in metric, and I need a nomograph for Minutes (0-200) to Metres / Kilometres (0 - 200?) then to Knots.

I'm fine with circles and triangles but equations like this and trying to create one that fits the requirement, I have no idea how to do that.

Can anyone please help?

Thanks

Pisces · 04-19-19, 03:49 PM

Seems like template #2 is the most similar to your Speed=Distance/Time. Where the third variable would need to be defined as function 1/z. But I let it generate with default settings (just to see it works) for 7 minutes now and nothing comes out. So I suspect it (or the back end) is buggy.

That's sad, as you found a nice gem in the interwebs with this one.

Pisces · 04-19-19, 04:05 PM

Yeah, 20 minutes later still nothing. Loosing the little bit of faith I had left in it just being slow. And I'm usually patient enough. Did you get any result?

There is a Windows installation procedure to let it run on your PC:
http://pynomo.org/wiki/index.php/Installation

I don't have the time to try it now. Maybe one day later I will try it. Supposedly you should be able to copy the script from the website to a text file and save it with .py extension.

Sean C · 04-20-19, 01:19 AM

Caveat: I'm no math wiz.

One Yard is 0.9144 meters - so you can pretty much use the yard scale on the existing MB as an estimation of meters (or kilometers) traveled in a given time period.

But, I did manage to modify the nomogram to make it slightly more accurate when using meters/kilometers.

Try it out and let me know what you think:

ljqcn101 · 04-20-19, 03:40 AM

Looks great. I guess you just streched the range scale to 1.09361 times the length of the original scale?

Sean C · 04-20-19, 04:16 AM

Thank you.

Actually, I tried scaling it based on the proportions - but that didn't seem to work so well. What I ended up doing was compressing*/repositioning it until various pre-calculated results [mostly] matched up.

I must admit, though, that I'm not entirely sure that I got it just right. That's why I'd be very interested in anyone's test results.

*Counter intuitively, the distance scale needs to be compressed rather than stretched.

Elphaba · 04-20-19, 05:28 AM

Quote:

Originally Posted by Nathaniel B.

Caveat: I'm no math wiz.

One Yard is 0.9144 meters - so you can pretty much use the yard scale on the existing MB as an estimation of meters (or kilometers) traveled in a given time period.

But, I did manage to modify the nomogram to make it slightly more accurate when using meters/kilometers.

Try it out and let me know what you think:

YOU'RE AMAZING!

Thank you SO much! That's fantastic!

04-19-19, 12:06 PM	#1
Elphaba Neptune's daughter Join Date: Apr 2007 Posts: 325 Downloads: 164 Uploads: 0	Clever Maths people - I need your help! This site: http://46.101.125.20:8080 If you click on WIZARD it describes a Function / Equation that you need to enter to create a nomogram. I'm trying to put together a PDF of a High resolution manoeuvring board in metric, and I need a nomograph for Minutes (0-200) to Metres / Kilometres (0 - 200?) then to Knots. I'm fine with circles and triangles but equations like this and trying to create one that fits the requirement, I have no idea how to do that. Can anyone please help? Thanks

04-19-19, 04:05 PM	#3
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,904 Downloads: 304 Uploads: 0	Yeah, 20 minutes later still nothing. Loosing the little bit of faith I had left in it just being slow. And I'm usually patient enough. Did you get any result? There is a Windows installation procedure to let it run on your PC: http://pynomo.org/wiki/index.php/Installation I don't have the time to try it now. Maybe one day later I will try it. Supposedly you should be able to copy the script from the website to a text file and save it with .py extension. __________________ My site downloads: https://ricojansen.nl/downloads

04-20-19, 01:19 AM	#4
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Caveat: I'm no math wiz. One Yard is 0.9144 meters - so you can pretty much use the yard scale on the existing MB as an estimation of meters (or kilometers) traveled in a given time period. But, I did manage to modify the nomogram to make it slightly more accurate when using meters/kilometers. Try it out and let me know what you think: __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet

04-20-19, 03:40 AM	#5
ljqcn101 Sailor man Join Date: Jan 2013 Location: Hong Kong Posts: 50 Downloads: 78 Uploads: 3	Looks great. I guess you just streched the range scale to 1.09361 times the length of the original scale? __________________ Automatic TMA calculator (metric system) Automatic TMA line detector and solver for DW/SC/688i Automatic TMA line detector and solver for maneuvering target (new)

04-20-19, 04:16 AM	#6
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Thank you. Actually, I tried scaling it based on the proportions - but that didn't seem to work so well. What I ended up doing was compressing/repositioning it until various pre-calculated results [mostly] matched up. I must admit, though, that I'm not entirely sure that I got it just right. That's why I'd be very interested in anyone's test results. Counter intuitively, the distance scale needs to be compressed rather than stretched. __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet

04-19-19, 03:49 PM	#2
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,904 Downloads: 304 Uploads: 0	Seems like template #2 is the most similar to your Speed=Distance/Time. Where the third variable would need to be defined as function 1/z. But I let it generate with default settings (just to see it works) for 7 minutes now and nothing comes out. So I suspect it (or the back end) is buggy. That's sad, as you found a nice gem in the interwebs with this one. __________________ My site downloads: https://ricojansen.nl/downloads Last edited by Pisces; 04-19-19 at 04:00 PM.