3D-printable EDF nacelle for VQ Models Hornet SubSonex (+ other accessories)

cults3d

I designed this nacelle for my VQ Models Hornet to eliminate terrible pitching when throttle increases. The original thrust line causes the plane's nose to drop sharply, and vice versa. This nacelle points efflux up (effectively down thrust), compensating for high thrust lines and making the plane fly great. A flight video with this nacelle and motor is here: https://youtu.be/2iATNxOVeFM It's designed for use with a JMT 70mm 3500KV brushless motor on a 4S battery: https://www.ebay.com/itm/JMT-70mm-3500KV-Brushless-Motor-for-RC-Airplane-6-Blades-EDF-Unit-Ducted-Fan/142493692168 This setup will draw 95 A with a 4S battery on full throttle and cruise the plane fine on half throttle. It doesn't overheat, as I use a 4S 4000 mAh lipo. Use short pieces of 4 mm rod to join the EDF housing together. The exhaust piece must point upwards, naturally. Print Fanhousing01 from ASA, ABS or PETG or other heat-resistant materials to prevent it from deforming due to motor heat. The cooling fan part can be used on the end of the motor if it gets hot. The recommended motor usually doesn't get hot. Dynamically balance the impeller using aluminum tape on the blades. Run up the motor with the impeller at low throttle settings and feel for vibrations. Add tape and try again, repeating until you find the imbalance, until it spins without vibrations. The battery tray part is a raised part for mounting the battery with velcro straps in the nose. The Noseretractmount part is a spacer for mounting retracts in the nose. Important safety warnings: - This assembly is highly loaded at high speed, so make sure you know what you're doing. - Ensure the integrity of the printed impeller is good before running it. - Always wear protective glasses when testing the fan. Protect your eyes. - Do not run the fan at high power while holding it in your hand. - Keep your hands and loose items away from the fan when running. It will shred your fingers if they get sucked in, and the suction force is very strong. If something gets sucked in, it can damage the impeller and potentially shatter, throwing loose debris out.