RC Paper Airplane - Classic Dart

thingiverse

Date: November 14, 2014 Lesson #1: Be cautious while testing the thrust gauge; avoid cutting corners when securing the motor and propeller. Here's a quick recap: The current combination of a #35 motor with a 10x6 prop at 40% throttle produced an acceptable speed and control, generating 500g of thrust. For Version 2, I will use a Turnigy 2836-2350 motor with a 6x4 prop, which produces 900g of thrust. However, the smaller diameter prop reduces torque effect significantly, ensuring smooth takeoffs at half throttle. HK still stocks these motors, known for their high power output. Nonetheless, be aware that the prop shaft comes out on the wrong side, so you may need to machine a groove to reposition the 'C' clip. However, this solution isn't recommended for everyone; instead, look for a similar motor with comparable speed (KV) and thrust on a 6-inch prop combo. Moving on, I recently decided to recreate the classic "Dart" paper airplane using 3D printing technology. It made designing and printing custom parts easier than ever. Just remember to exercise caution as it has moving components. You alone are responsible for any risks associated with this project. I designed and printed this RC paper airplane with a RepRap, using a 0.35mm head and 0.25mm layers, resulting in excellent quality. Larger heads might cause issues, so adjust the model accordingly. The main material is a 30x40 foam board from your local office supply store. The power plant consists of a Prop Drive 35-36 1400kV electric motor with a 10x6 prop and NTM Prop Drive 35 Series Accessory Pack (available at Hobby King). It's driven by a 60A ESC with BEC, and the receiver is an OrangeRx R615. I use two Hi-Tec HS-82MG servos configured for delta wing operation (configured in the transmitter). If you use different parts, your balance may change. Inventor Fusion files are included for modifications. A DXF/DWG file indicates cutouts and general placement dimensions for the parts, including CG information. The CG was derived from a paper folded model with good glide ratio, confirmed by test flights. The instructions are straightforward: Use the DXF/DWG file to cut out servo tray, motor and prop, battery box, and receiver tray. Ensure proper CG placement by adjusting parts as needed. Please be aware that the motor/ESC combo listed in the description has excessive torque at full throttle, which could cause uncontrollable spinning. A smaller prop would help, or adjust max throttle settings accordingly. Set elevons for a maximum throw of +/- 0.25" on low rates at outer tips. Program high rate switch settings for advanced control during flight testing or aerobatics. Some ESCs may cause noise in the BEC, affecting receiver connection. Perform range tests at various throttle settings to avoid issues. Use a separate receiver battery pack or independent BEC if necessary. The rear skid pieces protect wing tips and the bottom vertical stabilizer, while the tail piece aligns the vertical stabilizer during gluing. The servo tray fits inside the vertical stabilizer when cut correctly. I recommend using foam-safe CA for gluing, with potential switch to polyurethane (White Gorilla Glue) for the nose in future. Stay safe and enjoy your new creation!