The degree of resonance in real objects is determined by " Q ", which is the ratio of the elasticity to the degree of damping ( frictional loss ), and the intensity of the forcing sound or vibration.
32.
If frictional losses are neglected, the mechanical advantage of a block and tackle is equal to the number of parts in the line that either attach to or run through the moving blocks in other words, the number of supporting rope sections.
33.
Some motor vehicle ( and motorbike ) dynamometers can also be purely inertia-based where the power output is calculated from measuring the acceleration of a roller drum with a known rotational inertia and known parasitic frictional losses of the roller drum's bearings.
34.
However, the narrower pores required to give good thermal contact in a travelling wave regenerator, as compared to a standing wave stack which requires deliberately imperfect thermal contact, also gives rise to greater frictional losses, reducing the efficiency of a practical engine.
35.
Four-cylinder flat engines in the boxer configuration have their pistons horizontally opposed, so they are naturally balanced and do not incur the extra complexity, cost or frictional losses associated with balance shafts ( though the slight offset of the pistons introduces a rocking couple ).
36.
Building on his father's work, Sadi postulated the concept that " some caloric is always lost " in the conversion into work, even in his idealized reversible heat engine, which excluded frictional losses and other losses due to the imperfections of any real machine.
37.
These other effects would have a greater impact on the final calculated result than whether or not " C p " was held constant . ( examples of these real gas effects include compressor tip-clearance, separation, and boundary layer / frictional losses, etc .)
38.
The momentum theory applied to a helicopter gives the relationship between induced power loss and rotor thrust, which can be used to analyze the performance of the aircraft . Viscosity and compressibility of the air, frictional losses, and rotation of the slipstream in the wake are not considered.
39.
Although the forces in a cam engine are often greater and the frictional losses are high, they can also allow the use of larger bearing surfaces than a conventional crankshaft . Before the development of high performance bearing materials, the cam and swashplate engines appeared to offer some advantages.
40.
:: Assuming that you mean a Tandem bicycle, there is some information at Tandem bicycle # Performance : " Compared to a conventional bicycle, a tandem has double the pedalling power, without necessarily doubling the speed, and with only slightly more frictional loss in the drivetrain.
