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46417

Re: Darmstadt trig scales on body

Hi Harion There's no description of the slide rule manipulations, of your method using proportions. Would please let us (me) know a way to read that method.
Fabrice 94
4:33 PM
#46417
 
46416

Re: Linex - The transparent slide that isn't ..

Hi, Regarding your comment "I have provided scans of a Linex-rule with a transparent, Patent Applied For, well/back" There are some Aristo also with such long
e_lento13
4:25 PM
#46416
 
46415

Re: Proper definition of "Darmstadt rule"?

Hello, Pardon my ignorance, but I've seen the term "Darmstadt rule" used many times in this group, but I'm not certain what it means.  Wikipedia says that a
megarat
4:25 PM
#46415
 
46414

Re: Darmstadt trig scales on body

Fabrice, Maybe this is one of the reasons that I would like to see a simple Darmstadt rule with the A-B scales replaced by the CF, DF, CIF scales. (in place of
sliderulenut
4:18 PM
#46414
 
46413

Re: Darmstadt trig scales on body

... Yes, pretty hard to beat…but…with 2/83N Trigo scales on the body. 1 Align CIF(3) on D(1) => here I beat you, The move is only a fews milimeters  :)
Fabrice 94
3:57 PM
#46413
 
46412

Re: Darmstadt trig scales on body

Steve, I am confused by your definition of the Darmstadt rule. This rule had the LL scales on the back of the slide not the body as other rules used. marion
sliderulenut
10:32 AM
#46412
 
46411

Re: Darmstadt trig scales on body

Fabrice, that is essentially my method but using proportions as a start. marion
sliderulenut
Aug 1
#46411
 
46410

Re: Darmstadt trig scales on body

Your three-cosine multiplication would still take 7 steps on a Darmstadt rule. 0. No need to align the indices. 1. Set hairline to red 41 on S 2. Set right
theangl
Aug 1
#46410
 
46409

Re: Darmstadt trig scales on body

Hi Marion, This can be done even more efficiently if the trig scales are on the slide: C:RN -> D:4 ;move slide to put C right index to 4 on D X-> D:3
Steve Treadwell
Aug 1
#46409
 
46408

Re: Darmstadt trig scales on body

Hum, First attempt to compute that with Faber/Castell 2/83N, trigonometric scales on the body. Problem : compute cos 41 × cos 51 × cos 74 1. No need to Align
Fabrice 94
Aug 1
#46408
 
46407

Re: Darmstadt trig scales on body

I miss typed the last section: Read as ->D(10) =>CI(3) ->Ci(4) *T(36.9) ->S(36.9) *CI(5) So, we have four actions, three hairline moves and one slide move with
sliderulenut
Aug 1
#46407
 
46406

Re: Darmstadt trig scales on body

Paul, I have a three cosine solution using two proportions but it is messy and takes more operations. Here is a typical problem used by EEs that the Darmstadt
sliderulenut
Aug 1
#46406
 
46405

File - GroupReminder

All members of the The International Slide Rule Group are reminded that posting guidelines from your moderators are available at the following:area: FILES
sliderule@yahoogroups.com
Aug 1
#46405
 
46404

Darmstadt trig scales on body

... functions. Several times I have questioned the logic of placing trig scales on the body, most recently on the 8th and the 15th of July. I have yet to see
Paul Hirose
Jul 31
#46404
 
46403

Re: Linex - The transparent slide that isn't ..

Before going further into the Diwa 710/720 "The Trig-issue"-discussion ? What is The Readers opinion on the concept of a transparent slide on a
polsen51
Jul 31
#46403
 
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