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Calculation commonly applied to engines and mobile power sources
Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources
Power-to-weight_ratio
Dimensionless ratio of thrust to weight of a propelled vehicle
Thrust-to-weight ratio is a dimensionless ratio of thrust to weight of a reaction engine or a vehicle with such an engine. Reaction engines include jet
Thrust-to-weight_ratio
Movement of an object through air
high power-to-weight ratios to be able to generate enough lift and/or thrust to achieve take off. Vehicles that can fly can have different ways to takeoff
Flight
Indian light tank
designed to have a high power-to-weight ratio along with substantial firepower, protection, surveillance and communication capabilities. It is tasked to provide
Zorawar_(tank)
25-500-kW internal combustion engine, typically Brayton cycle-type
small gas turbine with similar cycles and components to a heavy gas turbine. The MT power-to-weight ratio is better than a heavy gas turbine because the reduction
Microturbine
Motor vehicle
at 550 N⋅m (406 lbf⋅ft) at 4500 rpm. This allows the KZ1-R to achieve a power to weight ratio of 416 bhp (310 kW; 422 PS) per tonne. The KZ1-R uses a carbon
Ascari_KZ1
Proportion of ducted compared to combusted air in a turbofan engine
bypass ratios to compromise between fuel economy and the requirements of combat: high power-to-weight ratios, supersonic performance, and the ability to use
Bypass_ratio
Motor vehicle
is that the car is more powerful. The weight is 750 kg (1,653 lb), setting the car's power-to-weight ratio to 666.6 hp (497.1 kW; 675.8 PS) per ton.
Rezvani_Beast
Long, slow and heavy trains often carrying bulk commodities
commodities such as coal or ore. Compared to "fast freight" trains, drag freight trains have a very low power-to-weight ratio, making these trains somewhat unpredictable
Drag_freight
Motor vehicle
and chassis, and the weight is only 760 kg (1,676 lb) giving it a quite satisfactory power-to-weight ratio. The time from 0 to 100 km/h (62 mph) is given
San_Storm
Motor vehicle
5,000 rpm, giving it a power-per-litre of 71.2 bhp/L, a power-to-weight ratio of 112.9 bhp/tonne and a torque-to-weight ratio of 131 Nm/tonne. The manual
Mazda_Lantis
Hypothetical aircraft engine design
total available power, it would also increase the weight, and thus not have any significant effect on the power-to-weight ratio. To meet the goals, more
Hyper_engine
1900s American piston aircraft engine
reworked the engine to produce a design that held the record for power-to-weight ratio for any engine for many years. Manly later worked for Glenn Curtiss,
Manly–Balzer_engine
Fictional vehicle created by Chrysler
vehicle is meant to be street-legal, the weight is set at 921 kilograms (2,030 lb), low enough to give the car a total power-to-weight ratio of 1,092 horsepower
SRT_Tomahawk
Synchronous electric motor powered by an electronic controller
The advantages of a brushless motor over brushed motors are high power-to-weight ratio, high speed, nearly instantaneous control of speed (rpm) and torque
Brushless_DC_electric_motor
V6 sports car designed by Ferrari
under the Dino marque. Its power pack puts out a combined 830 PS (610 kW; 819 hp), giving the 296 a power-to-weight ratio of 560 hp/ton. The 296 GTB was
Ferrari_296
Type of motorcycle
identified by a 'U' suffix, with engines restricted to satisfy the maximum power-to-weight ratio for use in countries where restrictive motorcycle licenses
Suzuki_GS500
engines: a liquid-propellant rocket and a turbine jet engine. Its power-to-weight ratio is a little higher than a regular jet engine, and works at higher
Rocket_turbine_engine
Type of racing using midget cars
class of racing cars. The cars are very small, with a very high power-to-weight ratio, and typically use four-cylinder engines. They originated in the
Midget_car_racing
Internal combustion engine type
flows. Two-stroke engines often have a higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines
Two-stroke_engine
Structure for securing floating vessels
silt. The advantage is that it has up to ten times the holding-power-to-weight ratio compared to a dead weight mooring; disadvantages include high cost
Mooring
American aircraft engine
cubic inches (27 L) and making 400 hp (300 kW), designed for a high power-to-weight ratio and ease of mass production. It was designed principally as an aircraft
Liberty_L-12
Motor vehicle
475 mm (58.1 in) Rear track: 1,550 mm (61.0 in) Curb weight: 1,295 kg (2,855 lb) Power-to-weight ratio: 259.2 W/kg (6.34 lb/hp) Top speed: 301 km/h (187 mph)
Porsche_911_GT2
Diesel engine with a turbocharger
compression ratio of 14.0. Turbocharging can greatly increase the power output of a diesel engine, bringing the peak power-to-weight ratio closer to that of
Turbo-diesel
Type of motorcycle
on a two-stroke bike, cassette type gearbox and dry clutch. Its power-to-weight ratio surpassed almost all sports bikes of the day. The first production
Bimota_V_Due
and vehicles that are over a certain power-to-weight ratio. High-powered vehicle restrictions do not apply to drivers over 25 years of age. P plates
Driver's licences in Australia
Driver's_licences_in_Australia
Type of motorcycle
by Suzuki from 1983 to 1987. One of the major features of the RG250 Gamma was its large power-to-weight ratio. Able to produce up to 45+ BHP at 8,500 RPM
Suzuki_RG250_Gamma
Belgian aircraft engine
lightweight, with a dry weight of 58 kg (128 lb), and a maximum power-to-weight ratio of 1.09 kW/kg (wet; coolant fluids weigh 5 kg (11 lb)). The engine
D-Motor_LF26
Motor vehicle
lighter than its predecessor. It offered easy handling and a balanced power-to-weight ratio. The 320 was replaced by the BMW 321 in 1938. Norbye, Jan P. (1984)
BMW_320
Aircraft drone using multiple power sources
optimized to have a high power-to-weight ratio. The generator transforms the chemical energy stored inside the fuel by converting it to mechanical energy
Hybrid_drone
Car with a visible external frame made of steel, aluminum or carbon fiber tubes
Chapman's philosophy of maximizing the power-to-weight ratio by minimizing weight rather than simply adding power. Early monocoque racing cars such as the
Exoskeleton_car
Indian main battle tank programme
electronic warning control. In addition, the engine has a high power-to-weight ratio and can run in a variety of harsh environments, such as over 5,000 m
Future_Main_Battle_Tank
Motor vehicle
and twin turbochargers. It was planned to have a power-to-weight ratio of 363 bhp (271 kW) per ton, and to get to 60 mph (97 km/h) in 4.3 seconds with a
Noble_M14
Reciprocating internal combustion engine
M11, the ISL9 was introduced to operate in the same market segment as the L10 had, yet with a better power-to-weight ratio, by enlarging the piston stroke
Cummins_L-series_engine
Reciprocating internal combustion engine
rpm and 460 N⋅m (339 lbf⋅ft) of torque at 5,750 rpm. giving it a power-to-weight ratio of 365 hp per ton. Only 600 cars were built. At 493 hp (368 kW)
Porsche_flat-six_engine
Main battle tank family of German origin
low caliber autocannons and heavy machine guns, giving it a high power-to-weight ratio. This, coupled with a modern suspension and drivetrain, gave the
Leopard_1
Motor vehicle
more, for a power-to-weight ratio of over 1,000 bhp (1,014 PS; 746 kW) per tonne, which is approximately twice the power-to-weight ratio of the aforementioned
Ultima_GTR
Early piston-driven aircraft engine
to 120 hp, it was at the low-end of the power range of contemporary engines, and was generally outperformed by rotaries whose power-to-weight ratio tended
Mercedes_D.II
Engine in which fuel combusts with an oxidizer
high power-to-weight ratios are required, internal combustion engines appear in the form of combustion turbines, or sometimes Wankel engines. Powered aircraft
Internal_combustion_engine
Argentine compound steam locomotive
designed by Livio Dante Porta. The locomotive had an unprecedented power-to-weight ratio and thermal efficiency, and is considered one of the most efficient
Argentina_(locomotive)
Regulation for grand tourer racing cars
similar power to weight ratio but achieved either by high power and high weight such as the Mercedes-Benz SLS AMG or low power and low weight such as
Group_GT3
Motor vehicle
configuration. By achieving an extremely high power-to-weight ratio, it has been intended primarily as a car to be used on the race track. However, it is
Westfield_XTR2
V8 sports car manufactured by Ferrari
ratio in the engine. Thus the weight-to-power ratio is reduced from 2.96 kg/hp to 2.5 kg/hp. In addition to the weight saving measures, the Scuderia's
Ferrari_F430
Fighter aircraft
its high power-to-weight ratio gave it excellent performance and it proved to be a formidable dogfighter. The origins of the Yak-3 went back to 1941 when
Yakovlev_Yak-3
American heavy tank
12-cylinder Ford GAC engine producing 750 hp at 2,800rpm, which gave it a power-to-weight ratio of 11.68 hp/t; more comfortable controls for the driver; and a massive
T29_heavy_tank
Engine designed for use in powered aircraft
poor power-to-weight ratios and were uncommon for that reason, although the Clerget 14F Diesel radial engine (1939) has the same power to weight ratio as
Aircraft_engine
British sports car developed by McLaren Automotive
having a dry weight of 1,399 kg (3,084 lb) and a maximum power output of 1,275 PS (938 kW; 1,258 hp), resulting in a power-to-weight ratio of 911 PS/tonne
McLaren_W1
German infantry fighting vehicle
still having a high power-to-weight ratio. The Puma (formerly also named Igel (hedgehog) and Panther) started as a follow-up project to the German 1996 "NGP"
Puma (German infantry fighting vehicle)
Puma_(German_infantry_fighting_vehicle)
British super-lightweight sports car
engine to produce 330 bhp (246 kW). The use of lighter-gauge steel and of carbon-fibre instead of GRP further improves the power-to-weight ratio. Caterham
Caterham_7
Main battle tank
and T-72-1982 (powered by a Model V-84MS four-stroke 12-cylinder multi-fuel engine developing 840 hp and offering a power-to-weight ratio of 18.8 hp/tone)
T-72_operators_and_variants
High-performance vehicle of the BMW 5 series
history where the newer model's power to weight ratio isn't higher than its predecessor due to the added weight. The previous F90 M5 could hit 0-100 km/h
BMW_M5
Sports car
(328 km/h). A total dry weight of 2,989 lb (1,356 kg) and maximum weight of 3,201 lb (1,452 kg) gives the 570S a power to weight ratio of 428 PS per tonne
McLaren_570S
Type of motorcycle
air of danger for inexperienced riders trying to cope with the bike's increased power to weight ratio over any previously available stock motorcycles
Kawasaki_triple
Type of internal combustion engine
Decreased efficiency Decreased power-to-weight ratio Decreased potential for tuning Increased power loss at higher elevation (due to lower air pressure) when
Naturally_aspirated_engine
State-operated intercity high-speed rail service of France
turbines, selected for their small size, good power-to-weight ratio and ability to deliver high power over an extended period. The first prototype, TGV
TGV
Motor vehicle
motors, this time pushing up to 1,287 hp (960 kW; 1,305 PS) and 1,725 lb⋅ft (2,339 N⋅m), leaving the power-to-weight ratio at 757 hp (564 kW; 767 PS) per
Techrules_Ren
Type of motorcycle
With its lightweight body and high power output, the resulting power to weight ratio of the bike made it the best 100 cc bike ever built for mass production
Yamaha_RX_100
Auto racing with small, open-wheel, high-power vehicles
cars have very high power-to-weight ratios, with weights of approximately 1,400 pounds (640 kg) (including the driver) and power outputs of over 900 horsepower
Sprint_car_racing
Soviet heavy tank prototype
to achieve a top speed of 60 km/h, thanks to a 1050-horsepower diesel engine, giving it a power-to-weight ratio of 15.4 hp/tonne, a ratio superior to
IS-7
American light tank
thus had an excellent power-to-weight ratio and mobility, able to run at speeds up to 72 km/h (45 mph). However, the vehicle proved to be very noisy and early
M551_Sheridan
American heavy tank
Nearby power to weight ratio: 10.68 hp/ton, compared to the Heavy Tank T29E3's 10.74 hp/ton. The T30 did have one drawback, and it was linked to the gun
T30_heavy_tank
High-explosive mixture of HMX and TNT
are concerned. A light (but effective) warhead means a superior power to weight ratio. This in turn results in a higher velocity missile with a longer
Octol
Engine configuration
Yo-Mobile hybrid car. Both claimed high fuel efficiency and high power-to-weight ratio, but there have been no successful demonstrations of claimed efficiency
Swing-piston_engine
Role of body height in sports
cyclists tend to perform better at flat one-day races, such as the cobbled classics, as absolute power is more relevant than power to weight ratio in that context
Height_in_sports
Prototype Croatian main battle tank
activity and optional 1,200 hp (890 kW) engine, which increases the power-to-weight ratio to approximately 27 hp/t. There are numerous smaller changes in fire
M-95_Degman
Light tank
Reibel machine gun. The weight of the first prototype was 13.5 tons. It had a 130 hp Aster engine and a power-to-weight ratio of 9.62 hp/t. The maximum
AMX_38
Type of motorcycle
world,[citation needed] meaning that, with a dry weight of 167 kg, it reaches a power-to-weight ratio of 1.42. The engine has a rev limit of 18,250 rpm
Ducati_Panigale_V4
Physical quantity representing energy content per unit mass
which has tables of specific energies of devices and materials Power-to-weight ratio Heat of combustion Specific orbital energy Orders of magnitude (energy)
Specific_energy
Motor vehicle
seconds Standing 1/4 mile: 10.9 seconds Standing km: 19.9 seconds Power-to-weight ratio: 558 hp/tonne Top speed: 362 km/h (225 mph) - estimated / 346 km/h
Noble_M600
Electric sports car
presented in June 2023 and is set to be the successor of the Porsche 918 Spyder. It is said to have a 1:1 power to weight ratio, made possible with an electric
Porsche_Mission_X
Overview of claims to the first powered airplane flight
custom engine which had a respectable power-to-weight ratio for the time, and especially for their ability to sustain and control the flight in three
Claims to the first airplane flight
Claims_to_the_first_airplane_flight
Racing car model
to a 4-speed or 5-speed Hewland L.G.500 or L.G.600 manual transmission. This made the cars very fast, with a notably excellent power-to-weight ratio.
Lola_T160
Sports car designed by McLaren Automotive
motor in favour of its low claimed dry weight of 1,198 kg (2,641 lb), which allows for a maximum power-to-weight ratio of 498 kW (677 PS; 668 hp) per ton
McLaren_Senna
Model of sports car by Lotus, 2000–2021
R17, rear 285/30 R18). Power to weight ratio: 407 hp/tonne (413 PS/1000 kg). On 4 May 2018, Lotus unveiled the Exige Sport 410 to augment the current Exige
Lotus_Exige
Large experimental piston aircraft engine
interchangeable with those for V-1710-E and -F engines. The V-3420 had a power-to-weight ratio of 1.6 kW/kg or 1 hp/lb, excellent for its time. It was envisioned
Allison_V-3420
Unit used for internal combustion engines
also termed specific power, although this should be qualified as volume-specific power. A similar measurement of power to weight ratio is also important
Brake horsepower per cubic centimeter
Brake_horsepower_per_cubic_centimeter
Motor vehicle
created that upped power to 192 bhp (143 kW; 195 PS) and weighed only 571 kg (1,259 lb), thus fulfilling its original power-to-weight ratio promise. In 2000
Lotus_Elise
Type of continuous-flow turbine engine
power, is their high power-to-weight ratio. The Federal Aviation Administration notes that turboprop engines develop more power per pound of weight than
Gas-turbine_engine
American sports car
model was changed to four exhausts. The car's weight reportedly stands at 2,950 lb (1,338 kg) with fluids, setting the power-to-weight ratio at 1,358 hp per
Hennessey_Venom_F5
Reciprocating internal combustion engine
light aircraft because of their light weight, compact size, tuning potential and inherently high power-to-weight ratio—as is true for all Wankel-type engines
Mazda_Wankel_engine
Main battle tank
opposed-piston engine makes it a fast tank, comparable to other modern MBTs with a power-to-weight ratio of about 26 horsepower per tonne (19 kW/t). The BM
T-84
Motor vehicle
acceleration because of its high power-to-weight ratio of 410 bhp (310 kW) per ton (260 model). It can accelerate from a stop to 60 mph (97 km/h) in 3.1 seconds
Caterham_7_CSR
Boat, smaller than a steamship, using steam
large, heavy, and produced little power, which resulted in an unfavorable power-to-weight ratio. The heavy weight of the Newcomen engine required a structurally
Steamboat
Topics referred to by the same term
Pressurized water reactor, a type of nuclear power reactor Power to weight ratio, a calculation applied to engines Preston and Wyre Joint Railway, a historic
PWR
WWII Soviet armoured car
shell fragments than the BA-20. BA-64s also possessed a much higher power-to-weight ratio and the placement of their wheels at the extreme corners of the
BA-64
American turboprop engine
Specific fuel consumption: 0.941lb/hr/shp (0.572Kg/hr/KW) approx Power-to-weight ratio: 0.859 shp/lb (1.41 KW/Kg) Data from World Encyclopaedia of Aero
General_Electric_T31
Diesel engine model
fuel made them vulnerable to fire, unlike diesel-powered E-boats. Until this time, diesel engines had poor power-to-weight ratios and low speed. Before the
Napier_Deltic
American turboprop airliner, built 1957–1961
turboprop airliner built in the United States. With its fairly high power-to-weight ratio, huge propellers and very short wings resulting in the majority
Lockheed_L-188_Electra
Energy per volume
energy Heat of combustion High-energy-density matter Power density and specifically power-to-weight ratio Rechargeable battery Solid-state battery Specific
Energy_density
Fuel-based auxiliary power unit that extends the range of a battery electric vehicle
interest as a range extender because of its high power-to-weight ratio and compact dimensions relative to displacement. It operates most efficiently at constant
Range_extender
must use a motorcycle from an approved category with an approved power-to-weight ratio. Module 1 takes approximately 20 minutes and is conducted in a safe
Motorcycle_practical_test
Turbodiesel aviation engine developed by Tusaş Engine Industries
25 L/h (6.60 US gal/h) at maximum power Specific fuel consumption: 12.8 L/h (3.38 US gal/h) at 70% power Power-to-weight ratio: 0.81 hp/kg (0.60 kW/kg) Maximum
TEI-PD170
Form of autoracing circuit rating
concern various categories of cars depending on their power to weight ratio, and grade 6 relates to autocross, rallycross and ice racing courses. Grade
List of motor racing circuits by FIA grade
List_of_motor_racing_circuits_by_FIA_grade
Four-cylinder, four-stroke, aircraft diesel engine
consumption: 35 L/h (9.25 US gal/h) at 100% power, and 19 L/h (5.02 US gal/h) at 60% power Power-to-weight ratio: 0.41 hp/lb (0.67 kW/kg) Torque: 512 Nm (maximum)
Austro_Engine_E4
British automobile manufacturing company
differential. The Mono weighs 540 kg (1,190 lb), resulting in a power-to-weight ratio of 518 bhp per tonne. It delivered performance figures of 0–62 mph
Briggs_Automotive_Company
Type of battery
Comparison of commercial battery types Nanowire battery Phosphate Power-to-weight ratio Solid-state battery Super-iron battery Blade battery Hanley, Steve
LMFP_battery
Italian two-seater sports car
440 N⋅m (325 lb⋅ft) at 6,500 rpm Power to displacement ratio: 131 hp/L (97 kW/L) Power-to-weight ratio: 472 hp/tonne (352 kW/tonne) Top speed: Over 320 km/h
Ferrari_360
Rechargeable battery used for vehicles
lithium-ion batteries that are designed for high power-to-weight ratio and energy density. Compared to liquid fuels, most current battery technologies
Electric_vehicle_battery
Racing car by Peugeot Talbot Sport
a very good power-to-weight ratio with more than 600 horsepower for a car weighing barely 900 kilograms and could accelerate from zero to 200 km/h (124
Peugeot_405_Turbo_16
Sports car manufactured by Lamborghini
undisclosed until 2021. With a kerb weight of 1,553 kg (3,424 lb), the Huracán LP 610-4 has a power-to-weight ratio of 2.55 kg (5.62 lb) per horsepower
Lamborghini_Huracán
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POWER TO-WEIGHT-RATIO
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POWER TO-WEIGHT-RATIO
POWER TO-WEIGHT-RATIO
POWER TO-WEIGHT-RATIO
POWER TO-WEIGHT-RATIO
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