Примеры использования Test drum на Английском языке и их переводы на Русский язык
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Official
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Colloquial
Test drum speed: 20 km/h.
R is the test drum radius, in meter.
R2 is the diameter of the reference test drum of 1700 mm.
Is the test drum surface radius, in meter.
R1 is the diameter of test drum, in millimeter.
Is the test drum speed, in kilometer per hour.
F1 is the percentage of load to be applied for the test drum.
Example: K 1 for a test drum diameter of 1700 mm;
Test drum speed: 20/km/h see table in paragraph 3.4. below.
Is the deceleration of the test drum, in radians per second squared.
In the torque method:the torque input measured at the test drum;
Is the test drum inertia in rotation, in kilogram metre squared.
ID is the test drum inertia in rotation, in kilogram meter squared;
In the deceleration method: the measurement of deceleration of the test drum and tyre assembly;2.
When tested on a test drum 1.70 m 1 per cent in diameter;
F2 is the percentage of load, as per above table,to be applied for reference test drum of 1700 mm.
D0 is the test drum angular speed, without tyre, in radians per second;
The tyre can be rotated either by means of a drive motor acting on the tyre axis or by pressing it against a test drum.
In case of a test drum diameter of 3000 mm and a tyre diameter of 1500 mm.
GRRF also considered a proposal by ETRTO to correct in the Regulation the provision for the load/speed test procedure with regard to the test drum speed GRRF6315.
Is the deceleration of the test drum, without tyre, in radians per second squared.
Mount the tyre and wheel assembly on a test axle andpress it against the outer face of a smooth surfaced power driven test drum either 1.70 m± 1 per cent or 2.00 m± 1 per cent diameter.
Δv is the test drum angular speed increment, without tyre, in radian per second;
Initial tests speed: 30 km/h less than the speed corresponding to the speed category symbol marked on the tyre(see paragraph 2.28.2. of this Regulation)if a 2.0 m diameter test drum is used, or 40 km/h less if a 1.7. m diameter test drum is used;
Record the deceleration of the test drum Do/ t and that of the unloaded tyre T0/ t. 3.
Initial tests speed: 30 km/h less than the maximum rated speed of the tyre the speed corresponding to the speed category symbol marked on the tyre(see paragraph 2.28.2. of this Regulation)if a 2.0 m diameter test drum is used, or 40 km/h less if a 1.7 m diameter test drum is used.
Any variation of the test drum speed shall not exceed 1 km/h within one time increment.
The maximum test speed for the second test in case of tyres suitable for speeds above 240 km/h for tyres identified by means of letter code"V" within the size designation(or 270 km/h for tyres identified by means of letter code"Z" within the size designation) is the maximum speed specified by thetyre manufacturer(see paragraph 4.1.15.) if a 2.0 m diameter test drum is used, or 10 km/h less if a 1.7 m diameter test drum is used.