Wind resistance

The SAW match is similar to the safety match except that it is richer in fuel, and gives a billowing somewhat wind-resistant flame. The phosphoms sulfide [1314-85-8] in the tip provides the ignitabiUty on any soHd surface, and a Httle of the same material in the base bulb adds to wind resistance, but otherwise the base is underbalanced in active materials to prevent self-ignition from mbbing during transportation. 

Fully Adhered. The substrate, ie, insulation, cover board, etc, that the single-ply membrane is to be attached to is either fuUy adhered or mechanically fastened to the deck. However, there are also appHcations where the membrane is adhered directly to the deck. The membrane is then adhered to the substrate. The typical method for adhering the membrane to the substrate is by applying a contact adhesive to the membrane and substrate, rolling the membrane into place, and brooming once the adhesive is ready. There are one-sided appHcations where the membrane is roUed directly into the adhesive that has been appHed to the substrate only. The membrane used in this appHcation method may be fleece-backed. FuUy adhered systems can be installed on any slope. The fuUy adhered appHcation offers a smooth surface that is easy to maintain and inspect, as weU as exceUent wind resistance on account of positive attachment. 

Standard Specification for Asphalt Shingles Made from Glass Felt and Surfaced with Mineral Granules Standard Test Method for Wind Resistance of Asphalt Shingles (Fan-Induced Method)... 

Wind Resistance. Asphalt shingles are certified to wind performance test standards on a continuous basis through independent third-party testing laboratories. Shingles that have passed the standard wind performance requirements, such as ASTM D3161, Standard Test Method for Wind Resistance for Asphalt Shingles, are identified by labels from the testing laboratory with whom they are in compliance. 

The following two methods are commonly used for measurement of winding resistance. 

In slip-ring motors the rotor winding resistance will be measured at the point of connection of the rotor winding to the slip-rings, so that the slip-ring resistance is eliminated from the measurement of the true rotor winding resistance. 

The accuracy of a VT depends upon its leakage reactance and the winding resistance. It determines the voltage and the phase errors of a transformer and varies with the VA on the secondary side. With the use of better core material (for permeability) (Section 1.9) and better heat dissipation, one can limit the excitation cunent and reduce the error. A better core lamination can reduce the core size and improve heat dissipation. 

Latemen-bild, n. lantern slide, -ofen, m. a lantern-shaped oven made by winding resistance wire arotmd a frame of porcelain rods. 

For these reasons, most riders cannot, or will not, increase their speed much above their personal comfort levels, even with lots of training. The additional speed just costs the rider too much energy. A rider going 15 mph must double his power output to ride 20 mph. Why these dramatic numbers Wind resistance varies with the square of the rider s airspeed, but the energy to overcome tvind resistance increases with the cube of the rider s airspeed. 

The same rule is true of automobile travel. An automobile traveling at 70 miles per hour will need nearly twice the energy to overcome wind resistance as if it made the same trip at 50 miles per hour. Again, the difference in fuel consumption will be less due to the effect of rolling friction (nearly independent of speed), the fuel used to accelerate up to speed after eveiy stop, and the energy used to operate lights, air conditioner, etc. 

No-load running current and power Check current balance Measure winding resistance High potential test Vihration test per NEMA MG 1-20.53 If a commercial test witness is desired, a commercial test described above must be made in all cases. A re-test is necessary when a witness test is specified. The Com-... 

Efficiency at full, and V2 load Power factor at full, and V2 load Winding resistance measurement Bearing inspection... 

How much energy does it take to accelerate a person and a bicycle of total mass 75 kg to 20. mph (8.9 m-s ), starting from rest and ignoring friction and wind resistance ... 

You would have to expend more energy to maintain that speed against friction and wind resistance. 

This equation can be derived from the laws of physics, in which case the parameteers a and b can be related to such factors as the muzzle velocity, projectile mass, angle of inclination of the gun, and wind resistance. The equation may also be empirical if measured values of z versus x are related by an equation of this form, with no reference to the laws of physics. 

The conclusion from the study was that there is no dramatic or sensational difference. A number of small differences, particularly in the elasticity of their tendons, may explain their dominance of distance events. More efficiency from the tendon reduces the amount of muscle and thus the size of the calf and hence there is less wind resistance and less inertia during running. 

Fire and Wind Hazards. Weather resistance of roof coverings is not necessarily correlated to fire and wind resistance. Underwriters Laboratory and the Factory Mutual System test and rate fire and wind hazard resistance, and some durability tests. Organic felt or fiber glass mat base shingles are commonly manufactured to meet minimum UL requirements, which, in addition to minimum mass, require wind and fire resistance properties. 

Materials of Construction May be constructed of wood, metal or concrete. The structure must be designed to withstand wind or earthquake stress, dead loads such as weight of tower and circulating water and vibrations from mechanical equipment. Constructed of thin concrete shells that have good wind resistance. 

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