Weight and balance
Enter crew, cabin load and fuel. See gross weight and center of gravity against the limits, at takeoff and at landing.
Know your numbers before you pull pitch
Rotorcalcs is a weight and balance calculator and an engine performance calculator for helicopter crews, starting with the UH-60A Black Hawk.
Two calculators, one loading plan
Work out the load once. The weight you plan is the weight the performance check uses.
Engine performance
Enter pressure altitude, free air temperature and your aircraft torque factor. See maximum torque available against the torque you need to hover, in or out of ground effect.
The flight manual chart work, in the same order you do it by hand
- Torque ratio from aircraft torque factor and free air temperature.
- Specification torque available from free air temperature and pressure altitude.
- Actual torque available from the torque conversion chart.
- Torque to hover from gross weight and wheel height, checked against the transmission limit.
Move the load, watch the limits
A simplified preview of both calculators. The numbers here are for illustration and are not flight data.
Center of gravity
Forward limitAft limit
- Gross weight
- Density altitude
- from altitude and temperature
Torque to hover out of ground effect
Built around the Blackhawk
Stations, limits and performance charts are set up for the Black Hawk, so you start from the aircraft and not from a blank spreadsheet.
- Main rotor diameter
- 53 ft 8 in
- Tail rotor diameter
- 11 ft
- Overall length
- 64 ft 10 in
- Wheel base
- 29 ft
