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RANCANG BANGUN BODI MOBIL LISTRIK MENGGUNAKAN FIBERGLASS Ramadhan, Zakaria; Saputra, Bayu; Yasin; Prasetia, Yogi; Sudarsono; Endriatno, Nanang
Piston: Jurnal Teknologi Vol 10 No 1 (2025): June 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i1.84

Abstract

Electric cars are cars that are driven by electric motors and use electrical energy stored in batteries. The use of electric cars certainly requires a vehicle design that can meet automotive needs that are more focused on the chassis and body. The performance of electric cars is influenced by the weight and aerodynamics of the car itself, one of which is the body of the electric car, to produce good performance, a design that has a low drag coefficient value is needed so that it can cut through the wind well and make this electric car go fast. The material used to make this electric car body is fiberglass with a hand lay up application technique. In making it, several preparations are needed, namely making designs, making moulds, and making bodies using fiberglass media. The results of the study indicate that for the specifications of the car body design results, namely the body height of 60 cm, body width of 82 cm, body length of 2.73 m, upper body width of 63 cm, inner body width of 50 cm, front body height of 37 cm, body glass length of 101 cm, glass width of 63 cm, rear glass height of 44.5 cm, front glass height of 10.5 cm with a body weight of 19.25 kg and a glass weight of 2.15 kg. The conclusion of this study is that the prototype body of the electric car can be attached to the frame properly after the car is used or driven and the prototype body. Electric cars are made of fiberglass, this material is very appropriate because it has a light character, easy to shape. But for performance in electric cars, body weight greatly affects the speed of electric cars so it is hoped that further research will be developed with a lighter form of electric car body.
Desain Mesin Pemisah Kulit Kacang Tanah Menggunakan Sistem Transmisi Ganda Endriatno, Nanang
Piston: Jurnal Teknologi Vol 10 No 1 (2025): June 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i1.111

Abstract

Post-harvest processing of peanuts requires an efficient outer skin peeling process to speed up the production process. Manual peeling is still common among farmers and small business actors, but this method is considered less efficient in terms of time and energy. Therefore, this study aims to develop a peanut peeling machine using a double belt transmission mechanism to improve work efficiency and peeling results. The machine development method includes designing and mechanism design. The machine is designed with a steel angle frame measuring 800 mm high × 500 mm long × 500 mm wide, using a peeling roller with a diameter of 267 mm and a length of 450 mm consisting of four spoons. The roller functions to scrape the peanut skin through a pressing system, while the sieve keeps the seeds and skins still during pressing. The mixture of peanut skin and seeds that have been separated will fall together through the sieve. Then it passes through the blower and separation occurs. This machine is driven by a 5.5 HP electric motor with a maximum rotation of 1400 rpm. The transmission system uses two belts and pulleys: a 100 mm input pulley and a 250 mm output pulley produce a roller rotation of 560 rpm, while the blower is driven by a 100 mm input and output pulley at 1400 rpm. This machine has the potential to be a practical mechanical solution to increase the efficiency of peeling results on a small industrial scale. Further development is needed to build a physical prototype of the machine and evaluate its performance and efficiency.