.5 Gross weight 5 10 20 30 40 50 100 200 kg x 1000 kg x lb x 10 20 30 40 50 100 150 200 300 400 lb x 1000 1000 1000 90 200 D 70 70 150 50 100 40 But 30 1080 60 20 20 10 60 40 30 20 20 1st gear "1 2nd 5 Rimpull + 3 30% -25%- 20% 50,000 lb 15% (22,700 kg) load Empty 10% 8% 6% 4% gear 3rd gear 15 4th gear 10 5th gear. 0 6th gear 7th gear 9 2 2 3 + 8th gear 2% Total Resistance (Grade plus Rolling) Direct Drive Torque Converter Drive --- 5 10 15 20 25 30 35 40 45 mph T 10 20 30 40 50 60 70 80 km/h Speed

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question

A wheel tractor-scraper is operating on a 3% adverse grade.  Assume no power derating is required for equipment condition, altitude, and temperature.

Use equipment data from Fig. 6.7.

Disregarding traction limitations, what is the maximum value of rolling resistance (in lb/ton) over which the empty unit can maintain a speed of 10 mph?

.5
Gross weight
5
10
20
30 40 50
100
200
kg x 1000
kg x lb x
10
20
30 40 50
100
150 200
300 400
lb x 1000
1000 1000
90
200 D
70
70
150
50
100
40
But
30
1080
60
20
20
10
60
40
30
20
20
1st gear
"1
2nd
5
Rimpull
+
3
30%
-25%-
20%
50,000 lb
15%
(22,700 kg)
load
Empty
10%
8%
6%
4%
gear
3rd gear
15
4th gear
10
5th gear.
0
6th gear
7th gear
9
2
2
3
+
8th gear
2%
Total Resistance (Grade plus Rolling)
Direct Drive
Torque Converter Drive
---
5
10
15
20
25
30
35
40
45
mph
T
10
20
30
40
50
60
70
80 km/h
Speed
Transcribed Image Text:.5 Gross weight 5 10 20 30 40 50 100 200 kg x 1000 kg x lb x 10 20 30 40 50 100 150 200 300 400 lb x 1000 1000 1000 90 200 D 70 70 150 50 100 40 But 30 1080 60 20 20 10 60 40 30 20 20 1st gear "1 2nd 5 Rimpull + 3 30% -25%- 20% 50,000 lb 15% (22,700 kg) load Empty 10% 8% 6% 4% gear 3rd gear 15 4th gear 10 5th gear. 0 6th gear 7th gear 9 2 2 3 + 8th gear 2% Total Resistance (Grade plus Rolling) Direct Drive Torque Converter Drive --- 5 10 15 20 25 30 35 40 45 mph T 10 20 30 40 50 60 70 80 km/h Speed
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