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JCGM 200:2012 [2.14] ( html / pdf )

Ruler

Angles

Scales

Squircle

Wood

1.2672…×10²⁸ [cm]
(H₀ = 73 [km s^-1 Mpc^-1])

Riess et al. (2021)

3.0857…×10¹⁸ [cm]

0.9461…×10¹⁸ [cm]

1.4959…×10¹³ [cm]

6.9570×10¹⁰ [cm]

6.3710…×10⁰⁸ [cm]

1.9733…×10^-05 [cm]

5.2918…×10^-09 [cm]

2.8179…×10^-13 [cm]

1.6162…×10^-33 [cm]

1.6180…

3.1415…

6.2831…

The Tau Manifesto

2.7182…

4.6692…

2.5029…

5.2370×10⁰¹ [cm]

Lightbody (2016)
Monnier, Petit, et Tardy (2016)

1.67 [cm]

info@elcraftor.ch

Changelog

Outer squircle resized to -25e^iπ cm²

Addition of Pioneer's symbol for the HI spin-flip line at 21.1061 cm
Renaming of high-trueness to trueness

Optimization of the linear mm scale
Addition of e^π "squarcle" for toasts
Clean-up of the protractor design
Bugfix: royal cubit changed from path to text
Renaming of "accuracy" to "trueness" as per JCGM 200:2012 [2.14]
Misc. usability-driven design improvements

Addition of termination nodes to the protractor spikes

Change of core plank shape (28 cm -> 30 cm)

Conversion scales made thicker for better resilience

Include multi-language plank names
Addition of new conversion scales
Cleanup of conversion scales
Misc. design adjustments

Initial design

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