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The Boeing 367-80 airliner prototype could be rolled at low altitudes with a wing loading of 387 kg/m 2 (79 lb/sq ft) at maximum weight. Like any body in circular motion , an aircraft that is fast and strong enough to maintain level flight at speed v in a circle of radius R accelerates towards the center at v 2 / R {\displaystyle v^{2}/R} .
Figure 1 Hard wheel rolling on and deforming a soft surface, resulting in the reaction force R from the surface having a component that opposes the motion. (W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown.
The standard rail weight for British railways is now 113 lb/yd (56.1 kg/m). Before the 1990s, most diesel locomotives were built to a maximum axle load of 19 long tons (19.3 tonnes; 21.3 short tons) so the maximum locomotive weight was 76 long tons (77.2 tonnes; 85.1 short tons) for a four-axle locomotive and 114 long tons (115.8 tonnes; 127.7 short tons) for a six-axle one.
2-10-10-2: 415 tonnes (457 short tons) 175,000 pounds-force (778 kN) simple; 147,200 pounds-force (655 kN) compound — Weight and performance figures listed for the Virginian variant, as that locomotive was the heavier and more powerful of the two. AA20: Russian Railways — Voroshilovgrad: 1934 Steam 4-14-4 140 tonnes (154 short tons)
The thrust-to-weight ratio is calculated by dividing the thrust (in SI units – in newtons) by the weight (in newtons) of the engine or vehicle.The weight (N) is calculated by multiplying the mass in kilograms (kg) by the acceleration due to gravity (m/s 2).
If an object with weight mg is displaced upwards or downwards a vertical distance y 2 − y 1, the work W done on the object is: = = = where F g is weight (pounds in imperial units, and newtons in SI units), and Δy is the change in height y. Notice that the work done by gravity depends only on the vertical movement of the object.
The type of jet engine used to explain the conversion of fuel into thrust is the ramjet.It is simpler than the turbojet which is, in turn, simpler than the turbofan.It is valid to use the ramjet example because the ramjet, turbojet and turbofan core all use the same principle to produce thrust which is to accelerate the air passing through them.
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.