Sentences with phrase «of air friction»

Not exact matches

(Space planes would be much faster because they'd complete part of their flights in space, where factors like winds and air friction are not an issue.)

The layer of air reduces friction

In the past, teams have suggested a variety of reasons for unusually long runouts, including having the material floating on a cushion of air (à la an air hockey puck) or gliding atop a friction - reducing layer of water or ice.

A material comparable to sharkskin — an outer casing made of plastic, shaped with microscopic grooves — could repel dirt and reducing air friction up to 5 percent.

But rain and other forms of precipitation rub against air molecules too, and produce a tiny bit of friction.

At the top of the eyewall, water condenses; as the resulting drops fall back down to the ocean surface they lose power through friction with the surrounding air.

Zhou says the warming was caused primarily by vertical mixing of the air, rather than as a direct result of friction as air passes over the turbines» blades: the movement of the turbines is mixing the cooler ground - level air with warmer air higher up.

Biomechanists Andy Ruina and Mario Gomes of Cornell University in Ithaca, New York, wondered if a walking or swinging robot — as long as it had no friction in its joints or air resistance — could achieve the same feat.

It could be the friction (with the road and air) that slows down the speed of a coasting car.

Strong temperature differentials between the stormy area and the region in front of the storm, can cause air to rise quickly, creating lots of friction and charge separation.

But this assumes a high degree of friction between the lower atmosphere and a craggy, rocky surface and efficient high - altitude air flow.

In just a few days, my feet go from silky smooth to dry and rough, thanks to the desert air and the friction of my sock-less feet on my flip - flops.

Developments in high - speed rail have historically been impeded by the difficulties in managing friction and air resistance [citation needed], both of which

e.g., (i) degraded combustion, if any, (ii) momentum in the moving engine parts prior to the clutch plate, (iii) momentum due to the physical displacement of the vehicle, (iv) friction due to movement of the vehicle, of which air resistance is one component, (v) dissipation of kinetic energy in the compression stroke, and (vi) braking.

Tyres # 162.47 each (Bridgestone Potenza) Brake Pads (front set) # 109.95 (Performance Friction) Brake discs (front set) # 79 Clutch, complete # 643 inc. flywheel Oil filter # 6.34 Air filter # 15.19 Spark plugs (set of eight) # 70.32 Exhaust system # 826.08 (Wortec cat - back)

Traffic regulations in a large number of countries require trucks to always drive with an engaged gear, which in turn provides a certain amount of engine braking (viscous losses to the engine oil and air pumped through the engine and friction losses to the cylinder walls and bearings) when no accelerator pedal is applied.

Turbocharging can improve the fuel economy [88] of diesel engines by recovering waste heat from the exhaust, increasing the excess air factor, and increasing the ratio of engine output to friction losses.

The higher compression ratio in diesels means they are harder to start, but once they are running the energy expended in compressing air is regained during the expansion stroke when the compressed air is allowed to «spring» back, so the higher compression ratio causes negligible engine braking via energy being lost as friction and heat of compressed air to engine block.

The output is courtesy engineering tricks like a weight - optimized forged crankshaft, forged pistons with low - friction rings, air - to - water intercooling and peak boost of 26 psi.

The engine block is newly designed to reduce mechanical friction and achieve an optimal air - fuel mix, and a direct fuel injection system is employed due to the wide variety of spray profiles that are possible, enabling the maximum expansion ratio to be achieved.

Thanks to extensive aerodynamic improvements (such as air inlet openings in front, modified door mirror caps, new wheel spoiler), tyres optimised for low rolling resistance and standard 8 - speed automatic gearbox optimised for low friction, Volkswagen was able to improve the fuel efficiency of the Touareg by up to six per cent (V6 TDI with 150 kW).

The ability to easily slip through the air, combined with low rolling resistance tires and the reduced friction in the optimized Hybrid Blue Drive powertrain, significantly reduces the amount of energy required to maintain highway speeds.

The design was chosen thanks to the large volume of air four valves can move, while the roller - followers provided a smoother operation with less friction than conventional lifters, adding to the engine's efficiency.

Carburetor; battery; battery / battery pack on hybrid vehicles; shock absorbers; manual transmission clutch assembly; friction clutch disc and pressure plate; throwout bearing; manual and hydraulic linkages; distributor cap and rotor; safety restraint systems (including air bags); glass; lenses; sealed beams; light bulbs; brake hardware; all exhaust and emission components except those specifically listed under the coverage section of this contract; weather strips; all trim, moldings, handles, knobs or dials; bright metal; chrome; upholstery and carpet; paint; outside ornamentation; bumpers; body sheet metal and panels; tires and wheels / rims; GPS navigation systems; phone systems; TV / Video / Entertainment systems and Internet Access systems unless luxury electronics option has been purchased by you and accepted by us.

They do become warm, because of the motor heat and even some from the friction of the air going through the hose, but only about 20 to 30 degrees above the ambient air temperature.

Other dryers on the market provide air at a high - velocity usually with no heating element; the friction of air moving through the hose and motor warmth keeps the airstream warm.

To make my position quite clear, it is not the friction of air with the surface of the earth which causes the climate to be chaotic, (although this seems to be what James Annan thinks!)

The colder the pole, the stronger the high, and the faster the northward motion of the air, and the sooner it can get north before picking up angular momentum from the friction against earth's surface.

One promising new device called «Silverstream» cuts water friction by laying a carpet of tiny bubbles along the hull so it rides mostly on air.

Viscosity is to air what friction is to a book sliding across a table — even if you start the book with some velocity relative to a table (or a parcel of air with some velocity relative to other parcels) viscosity will quickly bring the motion to a halt.

Surely a rising air mass dissipates some of its energy in friction, the most dramatic occasion of which is lightning and thunder.

another point i would like to add it that of energy use and the reason for it creating energy creates heat and each action has a oposite and equal action so using enry also creates heat through friction wheater it be in the engine burning the fuel or the friction of the air pasing over the car or air plane and the act of compresing air creates heat so avery activity taking place inside a city is producing heat

Finally, Prof. Chilingar appeared to attack global heating by concluding that direct heating of the air by human activity (aircraft air friction, power plant thermal plumes, etc.) couldn't possibly cause the observed heating — which every serious climate scientist (Prof. Chilingar is a petroleum scientist) would agree with completely.

This layer embeds most of the planetary boundary layer (PBL), which is affected by the surface friction and turbulent mixing, whereas the air above represents the free atmosphere (Schneider and Dickinson 1974).

I'm guessing that Musk's Hyperloop will be different (I'm guessing Musk's thing will use tubes that have very low air pressure - too hard to get a complete vacuum, but the less air, the less friction - and use maglev - like ways to accelerate and decelerate, which means as a bonus that you can recover a lot of energy when you decelerate), but we'll see soon enough.

But that's not the only simple improvement that could cut fuel use - now a team from the University of Warwick in the UK claims that «waggling» air accross aircraft wings could cut skin friction drag by 40 %, offering a 20 % savings in fuel consumption and emissions.

This kinetic energy is converted to thermal energy by friction with the atmosphere raising the temperature of the air molecules.

The heat can also force the air inside your tires to expand, and when the inflated tires come into contact with a heated surface like the asphalt on the roads the added friction increases the likelihood of a blowout occurring.

The bike has side stand indicators and power start for the convenience of the rider.Start: Power start Clutch: Multi plate Wet Brake type: Internal Expanding Shoe type (Front -130 mm & Rear — 110 mm) Weight: 112 kg Self Engine: Air - cooled, 4 - stroke Cylinder OHC Wheel: Cast wheels with low rolling friction

Make sure that your car tyres have the right air pressure because overinflating tyres reduces the area of contact with the road, resulting in loss of rolling friction on wet surfaces.