Forward drive car On
driving wheels of the front-wheel car 65 % of own weight and 66 % of full weight
with passengers and cargo (at the car of the classical scheme with back driving
wheels accordingly 55-60 and 40-50 %) are necessary approximately. So big share
of weight having on forward wheels (coupling weight), creates also big in comparison
with rear-wheel cars of cohesive force on forward wheels. Force of draught realised
by these forces at the front-wheel car is created ahead of the centre of weights
and pulls it behind itself. книги гарри поттер . огнезащитная обработка дерева . интеллектуальная собственность
 The stabilising
moment which aspires to return at turn operated wheels in a movement direction
on a straight line, it is appreciable more than at the car of the classical scheme.
And this moment that more than is more draught on driving wheels. These circumstances
provide very good course stability of the front-wheel car on dry and slippery
road, a sharp set of speed without proslipping of the driving wheels, confident
movement on dirt roads and in other difficult conditions. The car sensitively
reacts to turns of a steering wheel and is strict enough in driving.
 But driving
wheels of the front-wheel car are and directing and thereof are most overloaded
by forces. Here cohesive forces are used.не only on realisation of force of draught
or braking, but also on creation of the forces providing displacement of the car
for fulfilment of turn. Thereof at movement in certain conditions shortage of
cohesive forces is felt and the main lack of the front-wheel car - bad поворачиваемость
and a pulling down of a forward axis is shown at movement with a great speed on
slippery road. The car at an input aspires to move to turn on большему to radius,
than to it the driver steering wheel turn sets, or even persistently continues
to move in a direct direction. To leave this situation it is possible only reduction
of speed of movement ("gas" dump, but not brakes). Increase in speed
or still больший steering wheel turn only aggravate position, and the car can
go in general on a straight line.
Sign of overestimate of speed on slippery road is beginning slipping of
forward wheels. The driver feels it on a steering wheel which thus becomes a lung,
languid. At movement on a curve with reduction of "gas" the car охотнее
turns, and with increase - on the contrary, refuses to turn.
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