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YACS 2.0 - Yet Another Curta Simulator 2.0
Y A C S 2 . 1
Y et A nother C urta S imulator
SIMULATION
Background color
Click to select a background color
Cover type
Opaque<br>Transparent
Cover mode
Hide<br>Auto<br>Show
Exploded view
Explode<br>Implode
Show or Hide Parts
Show All<br>Hide All
Toggle
Setters Adder
Transmission Adder
Transmission Turns Counter
Carriage
Result Adder
Result Turns Counter
Rotor parts
Decimal Markers Setters
Bottom Plate
Sound
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OPERATION
Container
Open<br>Close
Cranking
>><br>>>><br>>>>>
Carriage position
Adder mode
Subtraction
Addition
Turns Counter mode
Increment
Decrement
Clearing
>><br>>>><br>>>>>
ADClear Adder
TCClear Turns Counter
ABOUT YACS
Help and Information
Viewing YACS
Using YACS
About YACS
About the Curta
Comments and Suggestions
info@satadorus.eu
Contributions via Paypal
VIEWING YACS
Rotate<br>Drag with mouse button pressed
Pan<br>Drag with center mouse button pressed
Zoom<br>Use mouse scroll wheel
Zoom in to inspect a part<br>Double-click on it<br>keep Double-clicking it to get closer
View preset Viewpoints<br>Right-Click in the 3D window and select Viewpoints<br>Use Page-Up / Page-Down keys<br>Home-key selects first viewpoint<br>End-key selects last viewpoint
Run the Simulator<br>Click the Buttons or<br>use keyboard Shortcuts
More information<br>Hover the mouse over the controls in the panels for pop-up hints<br>Right-click in the 3D window for a pop-up menu
USING YACS
Operating the Curta Simulator
Setting a number
Drag the slider up or down with mouse button pressed.
Here 163 is entered on the setters.
Turning the crank
Click the crank handle to start a crank cycle.
The higher you click on the handle the faster the turn.
Speeds are 1, 3, 9 and 27 s
Extending the clearing Lever
For easy use the clearing lever can be extended.
Click any part of the lever to extend it.
Folding the clearing Lever
The clearing lever must be folded to store the Curta in the storage container.
Click the clearing lever position plunger to fold the lever.
Clearing CCW Very Slow
Click on any of the 4 colored section of the clearing lever ring to start a clearing action
Here we start a Very Slow Clearing Counter Clockwise (CCW))
Clearing CCW Very Fast
Click on any of the 4 colored section of the clearing lever ring to start a clearing action
Here we start a Very Fast Clearing Counter Clockwise (CCW))
Toggle the main mode between Addition and Subtraction
Click the Crank handle to toggle the adder mode between Addition and Subtraction.
Here the adder mode is Addition
Toggle the main mode between Addition and Subtraction
Click the Crank handle to toggle the adder mode between Addition and Subtraction.
Here the adder mode is Subtraction.
Note the red ring under the crank handle to indicate Subtraction mode.
Set Turns Counter mode to Increment
Drag the Reversing Lever up for Increment mode.
A crank turn with the adder in Addition mode increments the Turns Counter
A crank turn with the adder in Subtraction mode decrements the Turns Counter
Set Turns Counter mode to Decrement
Drag the Reversing Lever down for Decrement mode.
A crank turn with the adder in Addition mode decrements the Turns Counter
A crank turn with the adder in Subtraction mode increments the Turns Counter
Rotating the Carriage with the cover visible
Click on the digits 1..6 on the underside of the carriage.
1 .. x 1
2 .. x 10
3 .. x 100
4 .. x 1000
5 .. x 10000
6 .. x 100000
Rotating the Carriage with the cover removed
Click on the shaft to rotate it to the x 1 position.
Calculating 12345 x 298
Calulated as: 12345 x 298 = 12345 x 300 - 12345 x 2
This way only 5 crank turns are required.
Set 12345 on the Setters
Set the carriage to the x 100 position
Crank 3 times to caluclate 12345 x 300
Set the carriage to the x 1 position
Set the Adder mode to Subtraction
Crank 2 times to caluclate 12345 x 298
Done...
12345 x
298
= 3678810
ABOUT YACS
Current Version
VRML: loading...
Why did I do it
For two main reasons:
To learn a little VRML programming
Because I feel the Curta Calculator is a real beauty
My first exposure to the Curta was when a teacher showed us a Curta in our classroom.
It really was an amazing little machine. We were each allowed to do one easy calculation on the Curta.
That was early 1964, not long after JFK was killed in Dallas. The Royal Dutch Air Force crashed an F 104 Starfighter every few months and there was Robot Archie, a fictional comic character known in the Netherlands as Archie de Man van Staal.
Yes:
In the past everything was better... even the future.
...
>> Fast Forward 44 years >>
...
After searching the Internet for a while I discovered that it was called a Curta.
The good thing is that there is plenty of information on the Curta.
The bad thing is that they are now collectable.
Not willing to...