Basic Calculations

Protocol

Hint: WIP.

1. Use Calculations Template - you can make a copy of it or include just the relevant quantities.
2. Document your work at a wiki page named MachineName_Calculations
3. Use Presentation Template to explain your calculations with pictures and diagrams. Embed this on the MachineName_Calculations wiki pag. For simple calculations, take pictures of backs of envelopes, your note sheets, screencasts, etc - that show basic quantifications. Use whatever is relevant to quantify what you are working on.

About

Calulations are importance for reasons of determining performance. They are also used in product literature to show useful product specifications.

Scaling Calculations are calculations that also consider scalability. These calculations include all relevant physical, mechanical, fluid, electrical, chemical, thermal, static, dynamic, aerodynamic, acoustic, optical, hydrological, nuclear, structural, and other properties that allow a machine to be effective for a particular purpose. Scalability is emphasized because a single design should be adaptable to different scales of operation via Intensive and Extensive Scalability. Calculations include both parameters and calculations based on these parameters.

Natural Resource Availability

• Solar income on earth - Solar Income
• Raodside hay - Straw Bale Calculations
• Inches of rain per area to gallons - [1]

Biological

• Worm Tower Calculations

Electrical and Magnetic

• Nichrome Wire Calculator
• Voltage Drop Calculator
• EMF Calculations - in FreeCAD?
• Open Source Motor Simulation - generic DC motor
• Axial Flux Permanent Magnet generator - OpenAFPM

Solar

• PV Temperature Derating Calculator
• Solar Angle Calculator
• Solar income on earth - Solar Income

Thermal

• PV Temperature Derating Calculator
• OSE Design Manual - Thermal Calculations
• Heat loss from a pipe. Select inner temperature, outer temp, dimensions, and wall conductivity - [2]
• PEX length for a given spacing and room size- [3]

Conversion

• Fractional inch to mm - [4]

Construction

• Gravel Calculator
• Foundation Calculations
• Caulk Calculator
• Deck Calculator
• CEB_Calculations
• Vinyl Siding Calculator

Speed, Torque, Power, Energy, Pressure

1. Torque and RPM to Power Calculator
2. Cycling Power and Speed Calculator
3. Torque Conversion Calculator
4. Pile Driver Calculations
5. Hammermill rotor load - Soil_Mixer_2019#Calculating_Load_of_on_Motor
6. Motor Speed Calculator
7. Hydraulics Calculators
8. Chain Length Calculator
9. Embodied energy - Cement Energy Calculations

Pipe and Flow

1. Plastic Pipe Pressure Drop Calculator

Physical Quantities

1. Motor Torque based on power
2. Nichrome Wire Calculator
3. Pulley Calculator
4. Solenoid Force Calculator
5. Solar Angle Calculator
6. Magnet Force Calculator
7. Cycling Power and Speed Calculator

Air Flow

1. Air Exchange Per Hour Calculator

Machine elements

1. Bearing calculation
2. Gear calculation
3. Coupling Selection
4. Motor selection

Economics

1. Cost of Living

Structural

1. FreeCAD FEM Workbench
2. Shaft Deflection Calculator
3. Beam Deflection Calculator
4. Fibers - Fiber-Plastic Composite Calculations

Size, Geometry, Weight and Volume

1. Area Calculator
2. Volume Calculator
3. Steel Plate Weight Calculator
4. Bolt Weight Calculator
5. Nut Weight Calculator
6. Metals Weight Calculator - by material
7. Steel Weight Calculator - steel by shape
8. Triangle Calculator
9. Basic force, torque, stress limit calculations
10. Center of Mass + Weight
11. Range of Motion Design calculations
12. CAE analysis for structural failure, fatigue, deformation, crash testing, abrasion, thermal properties, and others
13. Cost
14. Beam deflection
15. Expected lifetime
16. Basics Statics calculations according to Basic Statics Calculations Procedure
17. Expected maintenance cost according to Maintenance Cost Template
18. Performance/power/speed/lifetime/lift/etc.
19. Precision calculations - what precision of motion is achieved in devices
20. Tolerancing requirements
21. Hydraulic fluid flow and pressure
22. Basic static loads analysis of mechanical devices
23. Rotation speeds
24. Bending forces
25. Shear strength limits
26. Thermal loss calculations
27. Thermal profiles - FEA
28. Geometrical optics
29. Torque calculations
30. Rotational inertia
31. EMF calculations
32. Thermal mass calculations
33. Combustion calculations

Construction

• Gravel Calculator - how much gravel does it take to get a certain thickness over an area? Also Gravel Driveway Calculator.
• Span Calculator
• CEB Calculations

These calculations should be performed for all critical components of machines, even though the aim is not Value Engineering. In the case over-building of components for purposes of lifetime design, calculations are relevant for providing accurate assessment of safety factors and performance expectations independent of empirical performance data.

A list of desired calculations or data points should be produced for each machine. Note: a spreadsheet or education page should be included to give a crash course on each calculation for the benefit of a novice who has a working knowledge of secondary-level

OSE Machines

• Lyman Filament Maker Calculations
• Brick Pressing Rate Calculations
• Nichrome heater - D3D Universal v20.07 Calculations
• Biodigester gas production - Biodigester#Technical_Design_.2B_Calculations

Spreadsheet

The typical calculations for consideration are:

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