Determine the cycle time for a single-engine scraper rated at 21 cy heaped that is used to haul material from a pit to a fill 900 ft away under severe conditions. The average haul speed will be 14 mph The average return speed will be 20 mph Assume, at an average speed of 5 mph that 200 ft is required to both accelerate and decelerate. The operating efficiency will be equal to a 50-min hour. It will take 0.80 min to load this scraper. distance,ft 88 conversion factor = Time, min. speed,mph x 88 Distance, ft. Speed, mph Time, min Haul 200 accelerate 5 500 14 200 decelerate 5 Return 200 accelerate 500 20 200 decelerate Travel time Travel time min Load time Dump time (see table 8.7) Turn time fill 0.21 Turn time cut 0.30 Total time min -
Determine the cycle time for a single-engine scraper rated at 21 cy heaped that is used to haul material from a pit to a fill 900 ft away under severe conditions. The average haul speed will be 14 mph The average return speed will be 20 mph Assume, at an average speed of 5 mph that 200 ft is required to both accelerate and decelerate. The operating efficiency will be equal to a 50-min hour. It will take 0.80 min to load this scraper. distance,ft 88 conversion factor = Time, min. speed,mph x 88 Distance, ft. Speed, mph Time, min Haul 200 accelerate 5 500 14 200 decelerate 5 Return 200 accelerate 500 20 200 decelerate Travel time Travel time min Load time Dump time (see table 8.7) Turn time fill 0.21 Turn time cut 0.30 Total time min -
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:Chapter 8 SCRAPER CYCLE TIME
(See ppg. 236-244)
Determine the cycle time for a single-engine scraper rated at 21 cy heaped that is
used to haul material from a pit to a fill 900 ft away under severe conditions.
The average haul speed will be 14 mph
The average return speed will be 20 mph
Assume, at an average speed of 5 mph that 200 ft is required to both
accelerate and decelerate.
The operating efficiency will be equal to a 50-min hour.
It will take 0.80 min to load this scraper.
distance,ft
88 conversion factor =
= Time, min.
speed,mph x 88
Distance, ft.
Speed, mph
Time, min
Haul
200 accelerate
500
14
200 decelerate
5
Return
200 accelerate
500
20
200 decelerate
Travel time
Travel time
min
Load time
Dump time (see table 8.7)
Turn time fill|
0.21
Turn time cut
0.30
Total time
min
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning