Mechanical Expressions 1.1

Mechanical Expressions by Saltire Software is a sketch-based tool for modeling, analyzing, and visualizing mechanical systems. Draw mechanisms directly on screen, apply geometric constraints, and assign parameters such as lengths, masses, springs, dampers, forces, and drivers. The software uses symbolic computation to derive kinematic and dynamic relationships, enabling you to compute positions, velocities, accelerations, and reaction forces, and to animate system behavior as parameters change.

Designed for both education and early-stage design, Mechanical Expressions helps students and engineers explore ideas quickly, validate reasoning, and communicate concepts with interactive, accurate models—without heavy coding or complex setup. You can run parameter sweeps, generate plots, and share interactive models to support classroom demonstrations, lab activities, and design reviews.

Key capabilities:

• Sketch-based modeling with geometric constraints and parameters
• Symbolic kinematics and dynamics for precise, algebraic results
• Real-time animation and interactive exploration of design changes
• Support for masses, springs, dampers, forces, torques, and drivers
• Tools for visualization, plotting, and sharing of results and models

Mechanical Expressions is developed by Saltire Software. The most popular versions of this product among our users are: 1.0 beta, 1.1 and 1.2. The name of the program executable file is MechanicalExpressions.exe.