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Book ChapterDOI

Aerodynamic Study of a Three Wheeler Body

C. Bhaskar1, Krishna Rawat1, Muhammed Minhaj1, M. Senthil Kumar1, C.D. Naiju1 
01 Jan 2021-pp 225-230
TL;DR: The aim of this paper is to study three wheeler design and validate its limitations using aerodynamic study of the drag and lift forces that it faces, and hopefully, this study acts as a guide to other research.
Abstract: A three-wheeled mode of transportation other than just in India is common in most developing countries. Proving to be a cheap and effective way of transportation, their small size, easy bike-like manoeuvrability, due to its single front tire control and low cost of both purchase and maintenance make it nearly ideal as a method of public transportation. Despite all their benefits, updates to this vehicle have been few and far between. Three wheeler faces many tough tasks with more demands being made of its usage in ergonomics, exhaust and performance parameters. New designs have to be made to take three wheeler into the twenty-first century. The original three wheeler used in India was introduced in 1956, and there have been few changes to that original design, and while it has proved good over the years, it fails to live up to the current consumer expectations. The aim of this paper is to study three wheeler design and validate its limitations using aerodynamic study of the drag and lift forces that it faces. It calculates the theoretical maximum velocity to be 77 km/hr with the coefficient of drag to be 0.4975. The design of three wheeler needs more than a face lift, and hopefully, this study acts as a guide to other research.
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Journal ArticleDOI
TL;DR: In this paper, the effects of rickshaws and auto-rickshaws on the capacity of signalized intersections were analyzed in congested parts of the Dhaka metropolitan area.
Abstract: Non-motorized vehicles (i.e. rickshaws) and small size motorized vehicles (i.e. auto-rickshaws) are popular para-transit modes that provided door-to-door service in congested parts of Dhaka metropolitan area. Improper design of signal timing at signalized intersections is one of the reasons of traffic congestion in Dhaka metropolitan area. For capacity analysis, to convert the mixed traffic flow into basic traffic flow passenger car equivalents plays an important role. In Bangladesh for signal design purposes passenger car equivalents value of rickshaws and auto-rickshaw are assumed by the traffic engineers as there is no widely acceptable method to estimate PCE values of rickshaws and auto-rickshaws, which is likely to result in unnecessarily long queues and additional delays or, in other words, inefficient intersection control. The objective of this study was to analyze the effects of rickshaws and auto-rickshaws on the capacity of signalized intersections. This study also aimed at developing an estimation method of passenger car equivalent of rickshaws and auto rickshaws at signalized intersections by a macroscopic approach. Data of four intersections of Dhaka metropolitan were used for development of PCE values. Passenger car equivalent values of rickshaws and auto-rickshaws are recommended for capacity analysis of urban signalized intersections with a mixed traffic flow. The results indicated that the estimated PCE value of rickshaws and auto rickshaws of this study are different from the assumed PCE values that are presently used by traffic engineers of Bangladesh.

23 citations

01 Jan 2012
TL;DR: An auto rickshaw is a three wheeled motor vehicle with one front steering wheel that is most commonly found in developing countries as they are a very cheap form of transportation due to their low cost.
Abstract: An auto rickshaw is a three wheeled motor vehicle with one front steering wheel. Auto rickshaws are most commonly found in developing countries as they are a very cheap form of transportation due t ...

2 citations