Welcome to FOFSIM
a simulator of the forces of flight
FOFSIM is interactive and brings life to the diagrams that explain the forces of flight. Learn how an aircraft is balanced just by air. Explore a wide variety of flight situations. Take control and see how your control inputs affect the forces that act on the aircraft.
Launch FOFSIM
Tip: On a desktop click Ctrl+ a couple of times to enlarge FOFSIM.
New in version 1.9:
- Simpler forces table
- CG details in options
- Live computation of moments, when moments are shown
- Live computation of power in "power"-view
- A lift reducing bank angle can be set in the options page
Videos
Previous Releases
Version 1.8
- New Aircraft: Pipistrel Velis Electro
- Life formulas (lift and drag)
- Ground effect
- Damping
- Streamlines showing the average bending of the airflow
- Option to show induced forces (lift and drag)
- GUI decluttering - some features can be enabled in the options ("..." button)
- New diagrams (rate of climb, stability)
Version 1.7
- Simulation of a constant speed propeller
- RPM lever and RPM readout
- Manifold pressure readout
- Views that visualize the forces and the airflow at the propeller
- Engine performance diagram
Version 1.6
- Many interactive diagrams like Polare, CD, CL, CD/CL, Available vs. Required Thrust and Power, Drag etc.
- Improved flight model (prop. wash on elevator, flaps extension, performance, VX, VY)
- A small aircraft shows the flight path
- AOA drawn at wing and elevator
- Optical cleanup of wing and elevator
- Output of engine power in horsepower (HP) and percent of maximum continuous power (% MCP)
Version 1.4
