Ingenieur April-June 2016 Ingenieur Apr-June 2016 | Page 80

ENGINEERING FEATURES INGENIEUR Motorless Ferry that once plied the Jelai River in Kuala Lipis By Chin Siew Yin K uala Lipis was the capital of Pahang between 1898 and 1953. It was the gold mining centre and had many buildings with British architecture. After the Pahang state capital shifted to Kuantan, it slipped into a sleepy town with numerous structures of heritage interest such as railway viaduct, old shop houses, monuments and religious buildings. The town is situated on the western side of the Jelai River, with the other side relatively undeveloped until 1994 when a bridge was built to allow access. Prior to the existence of this bridge, there was a motorless boat ferry service to transport passengers and motorbikes across the Jelai River. I happened to travel from Kuala Lipis to the Felda Kechau area on work assignments in 1994. It would usually take me about one and a half hours to reach Felda Kechau on the opposite side of the Jelai River. There was no bridge then to connect both sides of the river. On my second trip to Kechau the same year, a local advised me to take a boat ferry from Kuala Lipis to cross to the opposite river bank, which would enable me to reach Felda Kechau in half an hour. That meant saving an hour on my journey. The boat ferry was owned and operated by the local 6 78 VOL - JUNE 2016 VOL66 55APRIL JUNE 2013 Boatman getting ready to move the boat Boat being propelled by river current to the opposite river bank The concrete stump holding the overhead cable that enables the pulley to slide along as the boat crosses the river Chinese Chamber of Commerce that charged 50 cents for each passenger and motor bike. The idea of the boat ferry is an ingenious one as it uses the power of current, a natural and free force. It is also an environment-friendly mode of transport, without the use of fuel which emits carbon dioxide and pollutants. Operating Mechanism To cross the river, the boat is positioned at 45º to the current to harness the current acting on the boat to move it in the direction of the resultant force as illustrated in the sketch Fig. 1, i.e, in a traverse direction. The operative mechanism consists of a high overhead horizontal cable tied between two tall concrete stumps at both sides of the river bank. Both ends of the boat are then tied to a pulley that is attached to the horizontal cable allowing it to slide along the cable freely. The two cables at both end of the boat are of different length; one slightly longer than the other.