https://www.youtube.com/watch?v=Aab-RvcEdMs
To make the system as light as possible and to eliminate the wire weight we made Swift`s propolsion unit in a small volume , components are colse to eachother .We used High density Li-ion round battery and all batteries installed inside carbon tube and electronic unit located behind the motor and this units is also a motor mount. To get the high performance from propolsion unit, we customize the engine, and we gaves spinner shape to the rotator of engine.for more information and Photohttp://www.danishaviationsystems.dk/news/2015/swift-part-ii/#prettyPhoto