Ekelund range calculator

[Bill Nichols]

I discovered by chance that there is an Ekelund range calculator available on Apple's App Store. I didn't buy it (a bargain at $1.99), but the screenshot looks serviceable enough.

:know:

[goldorak]

Ok, I think this warrants the question when will we have an iDW ? :D

[TLAM Strike]

The real question is when is somone going to make one for PC.

Dosn't Ekelund ranging use a round slide rule like an Is Was?

I have the patterns to make an Is Was but does anyone have the patterns to print out an Ekelund Range calculator?

[goldorak]

TLAM Strike, there are several Ekelund Range "calculators" available for pc, either as stand alone applications, or as exel style sheets (compatibile with microsoft excel or openoffice calc).
I have them, courtesy of phil21 who passed me these applications some years ago.
Are you interested ? :shucks:

[TLAM Strike]

Yes I would. I'll PM you my email address.

[jmr]

I saw that as well, Bill. I was just farting around in iTunes and on an impulse I typed in ekelund and lo and behold there was an app!

I have the patterns to make an Is Was but does anyone have the patterns to print out an Ekelund Range calculator?Is it the same thing as the Bearing Rate Computer slide rule as shown on page 10-24 of the US Navy Ops Spec NRTC? (http://www.globalsecurity.org/military/library/policy/navy/nrtc/14308_ch10.pdf)


Goldorak, I too would like a copy. I'll PM you my email addy.

[Bill Nichols]

The real question is when is somone going to make one for PC.

Dosn't Ekelund ranging use a round slide rule like an Is Was?

I have the patterns to make an Is Was but does anyone have the patterns to print out an Ekelund Range calculator?

Better yet, I have the real thing! What you want is the

"Bearing Rate Computer"
FSN 1A 1200-691-0962
MK 138 MOD. 01

Manufactured by: Felsenthal Instruments Co.


See JMR's post above for a link to an image you can use as a template.

:salute:

[jmr]

Ahhhh cool! Can you post a picture of your wheel?

[Pisces]

Is it the one on page 24 of that pdf? I once attempted to make one with a cad-program. But I overdid it on the smaller scale marks and placed it on the backburner. And later lost the file so i would have to start over. I'm not inclined to do so now though. All those lines were a pain in the stern.

There is was a slideruler made for use with SH4, a replica of what they used back then.

http://www.subsim.com/radioroom/showthread.php?t=106923&page=3

http://www.subsim.com/radioroom/showpost.php?p=530782&postcount=108

Found a pdf template of it:

http://www.filefront.com/Printable+IS+WASrar/;7476918;;/fileinfo.html


There was also supposed to be an opposite side with moving disks, to help in solving bearings,target and ownship course and such:

http://rapidshare.com/files/20112558/Submarine_Attack_Course_Finder_-_White.pdf.html

[Ramius]

Ahh the bearing widger :)

Im fairly sure i'll have a few of these lying around in the house/garage :arrgh!:

[Kapitan]

Well ramius would you sell a few of them or cant the be sold?

[Bill Nichols]

Is it the one on page 24 of that pdf?

Yes, that's the one.

Here's a pic of mine:


http://www.subguru.com/BRC.jpg

[Pisces]

Are those 4 seperate discs, or just 2 of which the top is a (partial) see-through? If the latter, what is the relation between 90 degrees and (about) 1.93 degrees/minute?

[edit] I think I allready figured out the last question. The anglular rate per minute when moving at 1 knot at a distance of 1k yards. Correct?

[Bill Nichols]

Just two disks. The bottom disk includes the 'SPEED KNOTS' and 'RANGE YARDS' circles, the upper disk has the 'BEARING RATE' and 'ANGLE' circles.

Also, I believe you are correct in your deduction.