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Although it's been a little quiet over winter we've had a new part of the project to work on: the Mark II plane! We had a problem with our Bix 3 based Bat UAV as a lot of ultrasound interference was coming from the propeller of the plane. This was picked up because the microphone is about 70 cm from the propeller.
By moving the microphone further away (to approximately 2 m) from the propeller we expect to see a vast reduction in ultrasound noise originating from this source. The logical way to do this was to put the motor and propeller at the front or back of the plane and the microphone at the opposite end. Using an extending telescopic fishing pole as a fuselage we're added some wings and control surfaces and managed to do just that. The photo above is of the plane without the full length of fuselage. In this configuration it did well in it's first test flight and we're planning on getting more testing in soon. Next time, we'll be testing the flight at the full length of the fuselage and then with the detector attached. Watch this space!
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March 2017
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