Units (Measurement)

Introduction

YSFlight (YSF) and YSFlight Community Edition (YSCE) back-end uses standard SI units, but allows for users to see measurements in a variety of units and allows for performance data to be entered in a variety of units. Whatever allowable unit the user enters, the back end will convert it into standard SI units.

Types of Units

Type	Units	Default YSCE Unit
Length	Foot (ft) Meter (m) Inch (in) Centameter (Cm) Statute Mile (sm) Nautical Mile (nm)	Meter (m)
Area	Square Inches ($in^2$), Square Meters ($m^2$)	Square Meters ($m^2$)
Weight	Kilograms (kg) Pound (lb) Tonne (t) Newton (N)	Kilogram (kg)
Force	Kilograms (kg) Pound (lb) Tonne (t) Newton (N)	Newton (N)
Speed	Mach Kilometers Per Hour (km/h) Meters per Second (m/s) Knots (kt)	Meters per Second (m/s)
Angle	Degrees (deg) Radians (rad)	Radians (rad)
Power	Horsepower (HP) Jules per Second (J/s) a.k.a. Watts (W)	Watts (W)
Time	Seconds (s)	Seconds (s)

Unit Conversions

YSCE uses the following equations to convert units to the default units used for internal calculations

Type	Unit	Equation	Output
Weight	lb	$lb \times0.453597$	kg
Weight	t	$t \times1000$	kg
Weight	N	$N \div g$	kg
Force	kg	$kg \times g$	N
Force	lb	$lb \times0.453597 \times g$	N
Force	t	$t \times1000 \times g$	N
Speed	Mach	$340 \times Mach$	m/s
Speed	km/h	$\frac{1000}{3600} \times km/h$	m/s
Speed	kt	$\frac{1852}{3600} \times kt$	m/s
Angle	deg	$\frac{\pi}{180} \times deg$	radians
Area	$in^2$	$0.000645 \times in^2$	$m^2$
Length	in	$0.0254 \times in$	m
Length	ft	$0.3048 \times ft$	m
Length	km	$1000 \times km$	m
Length	Cm	$100 \times Cm$	m
Length	sm	$1609.0 \times sm$	m
Length	nm	$1852 \times nm$	m
Power	HP	$740 \times HP$	W