Mnteraction of Two Micro-Propellers in Coplanar and Coaxial Arrangement for UAV Application
Naveenkumar1, Parag J Deshpande2, Ravi Dodamani3, Roshan Antony4 and Girish Prasad M5 

1Naveenkumar, Department of Mechanical Engineering NMIT Bengaluru, Karnataka, India.
2Parag J Deshpande, UAV Division, CSIR-NAL Bengaluru.
3Ravi Dodamani, UAV Division, CSIR-NAL Bengaluru.
4Roshan Antony, UAV Division, CSIR-NAL Bengaluru.
5Girish Prasad M Department of Mechanical Engineering NMIT Bengaluru.

Manuscript received on 06 March 2019 | Revised Manuscript received on 12 March 2019 | Manuscript published on 30 July 2019 | PP: 5992-5995 | Volume-8 Issue-2, July 2019 | Retrieval Number: B3702078219/19©BEIESP | DOI: 10.35940/ijrte.B3702.078219
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Abstract: In the present work, we have focused on the understanding of the effect of gap between micro propellers in coplanar and in coaxial arrangements on the thrust generation experimentally. In a way it’s a preliminary optimization of the spacing and placement of the micro propellers in a multirotor UAV system. APC 12-inch diameter (D) (12X8 E) and Master air screw (MAS) 11-inch diameter (11X6) propellers each 2 in numbers were considered in the study. A static testing rig was built with a provision to mount the propellers in coplanar and in coaxial arrangements. A thrust was measured using a single component load cell. Parameters like current consumption by BLDC motors and propeller RPM were also monitored. For coplanar arrangement, there is no influence of gap (G) between the propellers on the coefficient of thrust (CT). However, for G/D<0.2 random variation in CT is observed. Similarly, for propellers in coaxial arrangement, for smaller gap between the propellers along the axis is found to generate higher thrust. This optimization of the gap between the propellers may be lead to a compact multi-rotor UAV system having higher payload carrying capacity or higher endurance.
Index Terms: Aerodynamic Performance, Coaxial, Coplanar, Coefficient of Thrust, Gap to Diameter Ratio (G/D), Multi-Rotor UAVs

Scope of the Article: Performance Evaluation of Networks