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LAJU PEMBUANGAN PANAS PADA RADIATOR DENGAN FLUIDA CAMPURAN 70% AIR DAN 30% RADIATOR COOLANT DENGAN RPM 2000 TOYOTA AVANZA Heri Wijanarko; Sugihandoko; Suparyana
JURNAL MEKANIKASISTA Vol. 10 No. 1 (2022): NOVEMBER 2022
Publisher : PPM Sdirjianbang Akademi Militer

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Abstract

Cars that are used to travel long distances are usually driven at a fairly high speed with engine speed ranging from 2000 rpm and in a fairly long period of time. In order not to happen things that are not desirable due to the engine temperature exceeds the normal temperature of the machine when working, then this study needs to be done. In this study conducted comparative testing of engine heat dissipation rate between the use of 100% water with a mixture of 70% water and 30% radiator coolant with paired comparison method at rpm 2000. From the research, data were taken, among others, the temperature of the radiator Inlet and outlet, and the volume of radiator fluid flow (Q) which is then processed data to determine the mass flow rate (m), the specific heat of the fluid (Cp), the rate of heat dissipation radiator (q), and statistical data processing. The results of testing of a mixture of 70% water radiator fluid and 30% radiator coolant showed an average difference between the inlet temperature of the radiator with a higher radiator outlet temperature of 4.7250 C and the average heat dissipation rate of the radiator is also higher at 8.02931 kJ/s. This condition shows that at 2000 rpm, a mixture of 70% water and 30% radiator coolant has a higher engine heat absorption and dissipation capability than 100% water.
PERANCANGAN KATROL PADA CRANE PORTABLE KAPASITAS 300 KG GUNA ALAT BANTU DI BENGKEL PERALATAN AKADEMI MILITER Juniarto Satryo; Sukahar; Suparyana
JURNAL MEKANIKASISTA Vol. 10 No. 1 (2022): NOVEMBER 2022
Publisher : PPM Sdirjianbang Akademi Militer

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Military Academy equipment workshop one of the main tasks is to carry out the supply and maintenance of weapons, munitions and vehicle commodities to support the smooth running of education in the Military Academy environment. In the maintenance of vehicles often found a damaged vehicle engine so it needs to be repaired by lowering the vehicle engine. One of the tools needed is a crane. Crane is needed to move an item from one place to another. In the design of making this portable crane using steel rope type calculation according to United Rope Works Standard, Rotterdam Holland. Where the weight of the cargo lifted on this plan is 300 kg. Because the lifting is influenced by several factors, such as overload, dynamic conditions in operation and unexpected air changes, it is estimated that the additional load of 10% of the original load so that the weight of the cargo lifted to 330 kg. The maximum allowable stress value of steel rope is 362.946 kg, the permissible tensile stress is 59 kg/mm2, the cross-sectional area of steel rope is 0.088 cm2, the tensile stress that occurs on the rope is 41.24 kg / cm2. The calculation results are based on the selected type of steel rope according to United Rope Works Standard, Rotterdam Holland, which is 6 x 37 +1 fiber core. it is expected that planning steel rope is safe to use because the planned maximum tension (S) is smaller than the permit maximum tension ( S ) i.e. : 362.946 kg < 433.33 kg. And the planned tensile stress is smaller than the allowable tensile stress is : 41.24 kg/mm2< 59 kg/mm2.
Co-Authors Heri Wijanarko Juniarto Satryo Sugihandoko Sukahar