International Conference on Mechanical, Industrial and Energy Engineering 2018 23-24 December, 2018, Khulna, BANGLADESH * Md.Tasnim Rana. Tel.: +88-01521495880 E-mail addresses: rana.me.kuet@gmail.com ICMIEE18-315 Designing Approach of Blimp for a Hybrid VTOL Aerial Robot Md.Tasnim Rana * , Md. Shahidul Islam Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna-9203, BANGLADESH ABSTRACT In case of aerodynamic aspects when most of the research is going on how to increase lift, with developing its aerodynamic shape, the most advancement can be drawn with using inflatable blimps where lighter than air gases can be used. The lighter than air gasses will provide a great aerodynamic advances by providing lift using its bouncy forces. For controlling an aerodynamic object there is two forces, one is its own gravitational force in negative direction and controlling forces as required for changing its position .But, most of the cases gravitational forces make the most difficult situation while its time to deal with power consumption. By using inflatable envelope with lighter than air gasses we can easily deal with the gravitational forces of aerodynamic objects. This writing will present a design approach for this kind of inflatable envelope. Keywords: Aerodynamics, Inflatable, Bouncy, Gravitational 1. Introduction In recent years, the RC aircraft or drone has a problem with stability and longtime flight duration. A concept of adding blimp with traditional system can be made a better result to overcome the existing problem. The hybrid airplane combines three approved main concepts of human flight. It needs no infrastructure for takeoff and landing and is able to reach a higher cruising speed compared to airships and helicopter. It is built out of lightweight high-tech materials like dry wood, aluminum and high dense foils, while only a low amount of metal is applied to the structure. At present, no clear picture exits of the construction of a VTOL(vertical takeoff & landing) hybrid Unmanned Aerial Vehicle (UAV) for long duration flight in Bangladesh. Therefore, the purpose of this work is to design an inflatable blimp for VTOL aerial robot. 2. Background: Lighter than air constructions with lenticular hulls that reached the development stage of prototyping were the models XEM-1 to XEM-4 from LTAS/CAMBOT LLC [1], remotely piloted lenticular airships, which were built (from 1974 until 1981) as a demonstrator and for Filming, video observation and telecommunications work and their three full scaled rigid airship variants. W.C. Kelle (1989) observed that blimp made a good impact while boundary layer and atmospheric sampling included measurement of the radioactive transfer through the lower atmospheric boundary layer and ocean-surface flux measurements [2]. J.H.W. Hain (1992) investigated oceanographic sampling in the early 1990s included surface water sampling, phytoplankton hauls, temperature and salinity profiling, deployment of current drifters, and geophysical surveys [3]. W.A. Hoppel (1993) made an Page 3 of 10 airship, which was also used for studies of aerosol distribution and particle formation in the marine boundary layer [4]. Also ALA- 600 Thermo plane, an airship filled with both helium and hot gas, which was designed by NAYLER (2001) to operate with heavy loads, without a base or mooring mast was finalized in whereas ALA-40-01 ground tests started [5]. Cs. Singer (2008) made a general comparison between HTOL and VTOL(vertical takeoff & landing) Airplanes, Helicopters, Airships, Trains, Vehicles, Ships and the proposed hybrid airplane over their size, pollution, capacity, speed, range, security and required infrastructure was found out, which based on the quantitative comparison in the transport solution costs of different transportation concepts and their speed [6]. W.F. Putman (2011) investigated design and controls for the vectorotor hybrid VTOL heavy lift vehicle drone for multipurpose application show its commercial aspect [7]. Design of a commercial Hybrid VTOL UAV System by Intel Robot System made the step, review the preliminary design process of such a capable civilian UAV system, namely the TURAC VTOL UAV. Ugur Ozdemir (2014) made the TURAC UAV is aimed to have both vertical take-off and landing and Conventional Takeoff and Landing (CTOL) capability [8]. Yu Ito (2017) analyzed indoor hybrid blimp logistics drone provided with crash-free ability at full power-loss condition is made it easy for proving its advantages [9]. James C. Egan (2018) present discloser pertains to vehicle capable of flight and more particularly, to manned and unmanned vehicles having combined methods of lift, including dynamic lift and displacement buoyancy [10]. However, the construction of a VTOL hybrid UAV for long duration flight has not been made clear until now in Bangladesh. Therefore, in this project, a model of VTOL hybrid unmanned aerial vehicle for long duration flight is constructed. 3. Methodology In case of inflatable body, it can have a nested capacity or not. Nested wings are subset of re-deploying body in case of emergency design requirements. The main concept of a blimp came from “Airship concept”, but there is different in designing approach.