Mechanical Engineer's Toolbox [iPhone]

Get both Ductulator and Pipe Sizer at a reduced priced!

The Duct Sizer App designed based on surveying the needs of engineers.
This is a much faster and versatile equivalent of the duct sizing charts provided by top HVAC manufacturers.
Get a range of suitable duct sizes by inputting either the maximum friction rate or maximum velocity. Duct sizing for both rectangular and circular ducts. Tap on the values for velocity or friction to switch between calculation methods.
Users can change between I-P and S-I units by tapping the toggle switch at the top.
The detailed sizing mode allows the Engineer to adjust the duct dimensions and air flow rates, while checking the resulting friction rate and velocity which update automatically. Detailed sizing mode is typically used to analyse existing duct systems, and was added upon the request of users' feedback.
Calculations are based on standard air 0.075 lb/ft3 (1.2 kg/m3) in clean galvanized steel duct.

Pipe sizing app for water systems - both pressure and gravity. Supports S.I and I-P units.
The calculations are based on the Hazen-Williams equation for the pressure systems and the Manning's equation for the gravity system.
User can pick from a variety of currently available pipe materials, more will be added in future updates based on users requests.
The app automatically recommends the most suitable pipe size for the required flow rate, based on friction rate and velocity limits set by the user.

Any feedback is welcome, and will be the basis for future updates.