OpenMDAO/OpenMDAO-Framework — Issue #786: Pi has radian as unit, causing wrong unit in rpm and others
Author: ssalonen
Created: 2012-01-22 16:07:17+00:00
State: open

Since rpm is defined as follows in unitLibdefault.ini (openmdao.units):
```rpm: 2*pi*rad/min, RPM```

and pi as follows:
```pi: 3.141592653589*rad,pi````

The unit of rpm is actually rad^2 / min:
```python -c "from openmdao.units import PhysicalQuantity,add_unit;print PhysicalQuantity(1, 'rpm').in_base_units()"
0.10471975512 rad**2/s```

As a summary, all units using pi (rpm, rps, pt, Bohr, Hartree, mu0, hbar) are having wrong physical units.

I think pi should be dimensionless.