Motor and actuator sizing tool for special effects crews and engineers
About SFX Motor Calculator
SFX Motor Calculator is a tools app developed by PSI-Design.
Download Statistics
SFX Motor Calculator has been downloaded 1 times. In the last 30 days, the app was downloaded 0 times.
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App Information
SFX Motor Calculator is FREE to download. The APK download size is 3.98 MB. The latest version available is 1.4. The last update was on November 29, 2025.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play November 2025.
Description
SFX Motor Calculator helps special effects crews and engineers size motors for rotary drives and linear actuators. Whether you're building motorized props, vehicles, turntables, or screw-driven mechanisms, this tool provides the calculations you need.
**Two Specialized Calculators**
Rotary Drive Calculator - Calculate motor power, torque, and speed for wheeled vehicles and rotating mechanisms - Accounts for rolling resistance, gravity on inclines, and acceleration forces - Supports BLDC, PM DC, AC Induction, Hydraulic, and other motor types - Automatic gear ratio suggestions based on motor type - BLDC-specific KV rating and motor diameter recommendations
Linear Actuator Calculator - Size motors for ball screws, roller screws, and trapezoidal (ACME) screws - Load and velocity-dependent efficiency calculations for each screw type - Comprehensive backdrive analysis considering the complete drivetrain - EMF braking assessment for electric motors - Hydraulic motor sizing with displacement and flow rate calculations
**Realistic Efficiency Calculations**
Unlike simple calculators that use fixed efficiency values, this tool calculates screw efficiency based on actual operating conditions: - Trapezoidal screws: Efficiency from lead angle and friction coefficient - Ball screws: 85-95% efficiency with load and speed adjustments - Roller screws: 80-90% efficiency with better load retention at high forces
**Backdrive and Braking Analysis**
For linear actuators, the calculator provides detailed safety assessment: - System backdrive efficiency through the complete drivetrain - Self-locking condition identification - EMF braking capability assessment for electric motors - Guidance on when mechanical braking is required
**Hydraulic Motor Support**
Both calculators support hydraulic motors with outputs including displacement (cc/rev), flow rate (L/min and GPM), and operating pressure options from 100-350 bar.
**Flexible Unit System**
Switch between metric and imperial units for force, torque, speed, power, and pressure.
**Works Offline**
Once loaded, the app works completely offline - ideal for use on set or in workshops without internet access.
**Application Range** - Rotary: 100g miniatures to 50,000kg vehicles - Linear: Forces up to 50kN
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## Feature Bullet Points (for store listing)
- Size motors for vehicles, turntables, props, and rotating mechanisms - Calculate linear actuator requirements for ball, roller, and trapezoidal screws - Realistic efficiency calculations based on load and velocity - Backdrive analysis with EMF braking assessment - Hydraulic motor sizing with flow rate calculations - Metric and imperial unit support - Works completely offline - Handles loads from miniatures to heavy vehicles
Recent changes: Production release with some minor UI changes
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