iSlideRule Scales - C
"C" Scales
C
The C scale is a fundamental scale, running from 1 to 10, and is normally located at the bottom of the slide.

Gauge marks are located at C (√(4/π)), ⑫ (dozen), Ⓖ (gross), ρ (π/180), ρ'' (180*60*60)/π),  ρ' (180*60)/π), used in radians to degrees conversions, π, τ, C1 (√(40/π)), ρ⁰ (180/π) and δ (seconds in a radian in the French decimal system, (200*100*100)/π ).

Formula: C = X

C1
The C1 scale is a ranged fundamental C scale, ranging from 1 to √10.

Gauge mark is present at √10.

Formula: C1 = √10 × X

C2
The C2 scale is a ranged reciprocal fundamental C scale, ranging from √10 to 1.

Gauge mark is present at √10.

Formula: C2 = 1 / ( √10 × X )
Celsius
The Celsius scale is a temperature conversion scale, used with its counterpart, the Fahrenheit scale, to convert between degrees Celsius and degrees Fahrenheit.  This scale runs from -23 to 100 °C.
CF
The CF scale is a folded C scale, with the fold (or wrap) occurring at π (3.14).  This scale expedites the multiplication of values by π.

Gauge marks are located at π and τ.

Formula: CF = π × X
CF/m
The CF/m scale is another folded C scale, but this time, the fold is at 2.3 (natural log of 10).  This scale is useful when converting results between base 10 and base e.

Gauge marks are located at π and τ.

Formula: CF/m = ( loge 10 ) × X
Ch
The Ch scale is a hyperbolic cosine scale, ranging in value from 0.0 to 3.0

Formula: Ch = cosh X
CI
The CI scale is an inverse C scale, reversed in direction from the C scale (reciprocal scale).

Gauge marks are located at π and τ.

Formula: CI = 1 / X
CIF
The CIF scale is a reciprocal folded C scale, folded at π like the CF scale, but reversed as well, like the CI scale.

Gauge marks are located at π and τ.

Formula: CIF = 1 / ( π × X )
Const
The Const scale has several physical constants represented whose values can be read from the D scale.  The Const scale may only be present on the top or bottom rule.

© 2010-2022 Reid Performance Designs, All Rights Reserved.