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All Journal EDUCAFL : E-Journal of Education of English as a Foreign Language Jurnal Pengabdian Magister Pendidikan IPA Jurnal Hukum Volkgeist Jurnal Cahaya Mandalika Borneo Physical Education Journal NUSRA: Jurnal Penelitian dan Ilmu Pendidikan Journal of Language and Literature Studies Proceeding Applied Business and Engineering Conference JUDGE: Jurnal Hukum PEDAMAS (Pengabdian Kepada Masyarakat) Journal Serambi Engineering (JSE)
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Perbandingan Kecepatan Perahu 1 GT Menggunakan Propeller Dua Daun dan Tiga Daun Pada System Water Jet Ikhsan, Muhammad; B, Siswandi; Jupri; Efrizal; Muhammad Ryan Saputra; Bima Kurniawan
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Indonesia, as an archipelagic country with extensive marine areas, relies on small vessels as the main means of transportation for coastal communities; therefore, an efficient, safe, and suitable propulsion system for shallow waters is required. This study aims to analyze the effect of the number of propeller blades on the speed of a 1 GT boat equipped with a water jet propulsion system. An experimental method was applied by conducting speed tests in shallow waters using a 4-inch diameter water jet and a 7 HP Rubin engine. The tests were carried out using two-blade and three-blade propellers, each tested four times on the same boat, engine, and location. Primary data were obtained from direct testing and speed measurements, while secondary data included engine specifications, 1 GT boat characteristics, and water jet design data. The analysis was conducted using descriptive and comparative methods. The results show that the three-blade propeller produced a higher average speed of 4.88 knots compared to 4.13 knots for the two-blade propeller. The maximum speed achieved by the three-blade propeller was 5.3 knots, while the two-blade propeller reached 4.4 knots. These results indicate that the three-blade propeller generates greater thrust, making it more effective for improving the speed of small boats using water jet systems in shallow waters.
ANALISIS KEMAMPUAN TEKNIK LONG SERVICE PADA ATLET PB. LDU BADMINTON CLUB Suhendra Saputra; Jupri
Borneo Physical Education Journal Vol. 7 No. 1 (2026): Borneo Physical Education Journal
Publisher : Program Studi Pendidikan Jasmani

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Penelitian ini bertujuan untuk mengetahui tingkat kemampuan teknik long service pada atlet PB. LDU Badminton Club, dengan fokus pada atlet usia 10 sampai 13 tahun. Peneltian ini mrupakan Metode deskriptif kuantitatif dengan menerapkan teknik purposive sampling sehingga mendapatkan jumlah sampel 15 atlet. Tes yang digunakan dalam penelitian ini adalah long service. Hasil analisis kemampuan teknik long service PB. LDU Badminton Club menunjukkan 26,67% atlet berada di kategori kurang, 53,33% di kategori cukup, 13,33% di kategori baik dan 6,67% sangat baik. Dari hasil penelitian ini, terdapat beberapa indikator yang mempengaruhi tes seperti pegangan raket yang kurang tepat, posisi badan yang masih belum sempurna, posisi kaki yang salah, untuk meningkatkan keterampilan long service, perlu diperbaiki posisi handgrip, lecutan tangan, serta perkenaan raket dan shuttlecock. Diperlukan latihan yang spesifik, progresif, dan bertahap. Hasil perhitungan rata-rata statistik yang diperoleh adalah 47,667 %, sehingga dapat disimpulkan kemampuan teknik long service pada atlet PB. LDU Badminton Club ada pada kategori cukup. Penelitian ini merekomendasikan program latihan terarah untuk meningkatkan keterampilan long service atlet.
Co-Authors Afriantoni Anggraeni, Juraedah Dwi Arhjayati Rahim ARIF RAHMAN Bima Kurniawan Didik Cahyono Efrizal Fauzi, Muhammad Sukron Hassan, Ahmad Javed Jamaluddin Jumadil Muh. Syarif Lamanasa Muhammad Ikhsan Muhammad Ryan Saputra Naheria Pasarrin, Juari Rusmulyadi, Rusmulyadi Siswandi Siswandi B Suardi Rais Sugiarta, Lalu Ade Suhendra Saputra Suripto Umar P Vicky Ibrahim