Hemmi/Post 1460 Versalog Slide Rule
A classic slide rule replica implemented in JavaScript. All scales are programmatically drawn from reverse-engineered mathematical equations.
Background
The slide rule emulator was forked from the Sliderule Museum collection. I added the Dynamic Equation Solver that takes a user equation, parses it and generates the instructions for moving the slide rule and dynamically moves the sliderule. This was enabled for the Hemmi/Post Versalog Slide Rule because that is the sliderule I own.
The goal is for training someone new to using a slide ruler or refreshing someone who used to use Slide rule. Note that a major difference in the Versalog from other rules is the missing A scale for square roots. It instead has a double set of R scales (R1 & R2) that allow far more precision in the result of the square root but do not allow chained operations so problems involving square roots in a chain of operations requires the result to be transposed to the D scale for the next operation.
The goal is for training someone new to using a slide ruler or refreshing someone who used to use Slide rule. Note that a major difference in the Versalog from other rules is the missing A scale for square roots. It instead has a double set of R scales (R1 & R2) that allow far more precision in the result of the square root but do not allow chained operations so problems involving square roots in a chain of operations requires the result to be transposed to the D scale for the next operation.
Enjoy the simulator / solver
How to Use
- Drag the rule or cursor with your mouse
- Scroll with mouse wheel to zoom in/out
- Right-click on cursor or scale to enter values:
- Numbers:
3.14 - Constants:
pi,e - Degrees:
2:30:26
- Numbers:
- Use the Equation feature to solve mathematical expressions
- Toggle Markings and Display options in the control panel
