Question 1:A race car is turning (cornering) on a flat road, as shown in Figure Q1-1. Thespeed of the car is 300 kph and the turning radius is 260 m. Having the carparameters as below, answer questions a) and b).●.●●m = 890 (kg) (57% of the weight is on the rear axle);Air density = 1.225 (kg/m3);Equivalent aerodynamic lift coefficient for front axle= -0.915 (-);Aerodynamic frontal area= 1.11 (m²);Slip angle of the front tyres= +2.4 (°);Slip angle of rear tyres= +1.2 (°);The steering angle of wheels= -1.9 (°);The efficiency of the drivetrain from the engine to the contact patch oftyres is 100%.8=-1.9°----R=260 mα = +2.4°αR = +1.2°Figure Q1-1 Motion of the vehicle and the anglesa) Calculate the engine power delivered to tyres to overcome the totalinduced drag due to lateral force. b) The rolling resistance force at the contact patch of tyres is calculated asFRR = (fo+f₂V²)Ę₂ where F₂ is the normal load on the tyre, f₂ = 2 x 10-6and fo varies in terms of slip angle of tyres as in Figure Q1-2. If the car isa rear-wheel drive, calculate:Power losses at front wheels due to rolling resistance for slip anglesof 2.4º.fo(-)-3.6-2.4-1.20.030.0250.020.0150.010.00500.0a, (°)1.22.43.6Figure Q1-2 Variation of the rolling resistance coefficient fo of front wheels interms slip angle

Given Data- 1. Speed of car v=300km/h 2. Turning radius r =260m 3. mass m =890Kg (57%…

A race car is turning (cornering) on a flat road, as shown in Figure Q1-1. The speed of the car is 300 kph and the turning radius is 260 m. Having the car parameters as below, answer questions a) and b). m = 890 (kg) (57% of the weight is on the rear axle); Air density = 1.225 (kg/m³); Equivalent aerodynamic lift coefficient for front axle= -0.915 (-); Aerodynamic frontal area= 1.11 (m²); Slip angle of the front tyres= +2.4 (°); Slip angle of rear tyres= +1.2 (°); The steering angle of wheels= -1.9 (°); The efficiency of the drivetrain from the engine to the contact patch of tyres is 100%.

A race car is turning (cornering) on a flat road, as shown in Figure Q1-1. The speed of the car is 300 kph and the turning radius is 260 m. Having the car parameters as below, answer questions a) and b). m = 890 (kg) (57% of the weight is on the rear axle); Air density = 1.225 (kg/m³); Equivalent aerodynamic lift coefficient for front axle= -0.915 (-); Aerodynamic frontal area= 1.11 (m²); Slip angle of the front tyres= +2.4 (°); Slip angle of rear tyres= +1.2 (°); The steering angle of wheels= -1.9 (°); The efficiency of the drivetrain from the engine to the contact patch of tyres is 100%.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

b) The rolling resistance force at the contact patch of tyres is calculated as
FRR = (fo+f₂V²)Ę₂ where F₂ is the normal load on the tyre, f₂ = 2 x 10-6
and fo varies in terms of slip angle of tyres as in Figure Q1-2. If the car is
a rear-wheel drive, calculate:
Power losses at front wheels due to rolling resistance for slip angles
of 2.4º.
fo(-)
-3.6
-2.4
-1.2
0.03
0.025
0.02
0.015
0.01
0.005
0
0.0
a, (°)
1.2
2.4
3.6
Figure Q1-2 Variation of the rolling resistance coefficient fo of front wheels in
terms slip angle

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