News Video Aerospace Defence & security Electronics & communications Building a UAV By Stephen Harris 6th December 2012 12:36 pm 16th December 2015 12:08 pm The Engineer paid a visit to Southampton University to get an up-close look at the technology that’s enabling the creation of low-cost unmanned aerial vehicles. For a more detailed look at HALO, see our in-depth feature. News Electronics & communications Curved LCD display can be embedded in contact lenses In-depth Civil & structural Job opportunities in the UAE News Energy & environment Kernel Capital leads investment in Dublin company SolarPrint News Policy & business Science minister announces £1m funding for space firms News Energy & environment Climote signs heating control contract with Electric Ireland Latest ArticlesComments (8) Viewpoint Renewables It’s time to introduce the business community to the electricity storage industry Blog Policy & business Realism must trump alarm News Materials Doped carbon could treat water from Fukushima News Materials Cation insertion improves battery material properties chris 6th December 2012 at 1:12 pm Susppending the batterie many inch,s blow the body may well increse the stability of the uav . This would however have to be measuered against wind and drag to show if any gains are to be had . Reply Link John Ryder 6th December 2012 at 3:00 pm When people begin getting their pizza deliveries and doing their banking by UAV it`s gonna get mighty congested up there. Reply Link Jim H. White 6th December 2012 at 3:37 pm Why not use three, longer legs for more stability on a rough landing site? When better batteries are avaialble, hopefully soon, that should really help with longer mission time. Hopefully you will have matched the motors well to the propellers/fans as the efficiency of the combo can drop off dramatically if the motor is oversized. Have great fun as this is the right way to live and do great things! If you lose track of time you are doing it right. Never believe the assumptions of others! Read Rupert Sheldrake soon! Jim H. White (System designer of the Canadarm and designer of all six joint drive systems) Reply Link Mike Dinsdale 6th December 2012 at 6:03 pm As one can see building new functional models of UAV and prototypes manned craft is rather easy and use the same carbon fibre and titanium aluminium construction materials albeit in slightly larger diameters and thicknesses. Reply Link Dr Stephen Prior 12th December 2012 at 1:41 pm Many thanks for all the comments. The battery position was chosen for compactness and portability. The UAV is very stable and agile with this configuration. The reason for four legs was to enable a landing on a pitched roof (with two possible angles). This was one of the requirements of the DARPA UAVForge challenge. Our motors/props are very well matched, providing efficient flight modes and long endurance, currently 32 minutes in hover. We enjoy working hard and having fun doing so! Reply Link JohnK 12th December 2012 at 2:33 pm I’m not convinced that dual, counter-rotating propellors is the most effective use of power. It seems to me the lower propellor has to deal with extremely turbulent airflow. Reply Link NickB 17th January 2013 at 10:37 am Has anyone here read the Standord University report “living under drones”? It documents the experience of Pakistani communities that are subject to arial surveillance (and military action) 24/7. the development of UAVs dramatically lowers the cost of military action, for rich nations, and results in increased use of force, with widespread civilian loss of life as a result. I would like to ask the engineers posting on this site what they think the ethics are of contributing to development of this technology? Presumable the funding is military, rather than from pizza companies? Reply Link Marcus UAV 3rd February 2013 at 7:20 pm Building your own UAV unless your already knowlegable about RC is going to be very difficult for the average individual to undertake. Furthermore, if you plan on using the UAV for a specific purpose, what you end up building will have to be built and rebuilt to get the kind of results you want out of it. I know because I was a hobbyist at one point myself. Reply Link Name Email Cancel reply Threaded commenting powered by interconnect/it code.