T/W for a level constant velocity turn:

T/W for a desired specific energy level:

T/W for a desired rate-of-climb:

T/W for a desired T-O distance:

T/W for a desired cruise airspeed:

T/W for a service ceiling:

C_Lmax for a desired stalling speed:

Design gross weight:

Useful load:

W₀ consists of:

Fuel weight ratio:

Empty weight ratio:

This can be solved for W₀:

Sailplanes:

Powered sailplanes:

Light Sport Aircraft (land):

Light Sport Aircraft (amphib):

GA single engine:

GA twin piston:

GA twin turboprop:

Agricultural:

UK system (T in lb_f, V in ft/s):

SI system (T in N, V in m/s):

To convert torque and RPM to SHP:

Gagg and Ferrar model:

General lift curve slope:

The Law of Effectiveness:

Raymer:

Brandt:

Horizontal tail volume:

Vertical tail volume:

HT dependent tail arm:

VT dependent tail arm:

HT and VT dependent tail arm:

Power coefficient:

Thrust coefficient:

Torque coefficient:

Power-torque relation:

Propeller efficiency:

Propeller thrust:

Thrust quadratic spline:

Ideal efficiency:

Static thrust, T_STATIC:

Corrected static thrust:

Calibrated airspeed:

Equivalent airspeed

True airspeed:

Mach number:

Speed of sound:

Torenbeek’s balanced field length:

Acceleration on a flat runway:

Acceleration on an uphill slope γ:

Lift-off speed:

Time to lift-off:

Ground run:

Ground run for piston props:

Rotation distance:

Climb angle:

Transition distance:

Transition height:

Jets in climb:

Propellers in climb:

Rate-of-climb:

General angle-of-climb (AOC):

Min/max airspeed:

Stalling speed:

Level stalling speed at load factor n:

Stalling speed at angle of bank ϕ:

Minimum thrust required, V_TRmin, or best glide speed, V_BG, V_LDmax:

Max L/D:

Carson’s airspeed:

Power required:

Bank angle:

Load factor:

Turn radius:

Time to turn ψ degrees:

Turn rate in radians/sec:

Thrust required at a load factor n:

Load factor that can be sustained at a given thrust T and airspeed V:

Airspeed for a given C_L:

Max sustainable load factor:

Maximum sustainable turn rate, :

Minimum sustainable turning radius:

where: = load factor and = airspeed for minimum turning radius

Maximum level bank angle:

Specific excess power:

Specific energy and height:

Range profile 1:

Range profile 2:

Range profile 3:

Endurance profile 1:

Endurance profile 2:

Endurance profile 3:

Specific range: