this post was submitted on 11 Apr 2025
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Engineering Memes

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Hot take on formulas (lemmy.world)
submitted 1 year ago by MisterFrog@lemmy.world to c/engineeringmemes@lemmy.world
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Engineering references that specify formulas with variables with specified units, instead of constants with defined units, are a travesty.

I refer to Crane Technical Paper 410 in this instance.

Why would I want

ΔP = 32000 μ L v/d^2 (for laminar flow)

You'd expect this to be a normal formula, which you do your own dimensional analysis, but no. Units are specified. But not even on the same page, no no, on a "nomenclature" page you have to know to look for.

ΔP in Pa

μ in cP

L in m

v in m/s

d in mm

When I could have

ΔP=32 μ L v/D²

and YOU use whatever units you want.

Hell I could even put imperial units in here if I were a masochist. Very upsetting.

Engineering textbooks/technical papers need to find Pure Math Jesus.

Formulas with hidden units? Not even once.

Crane TP 410. How could you?

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