Flying Wing Buratinu

myminifactory

The Buratinu is a compact derivative of the renowned Buratino, skillfully designed by Bil in St. Petersburg. Bil's impressive design has earned my sincere appreciation, and I'm excited to put it to the test with its pointed nose. With this feature, I was confident that I could overcome the challenging CG problem often encountered with printed planes. The original Buratino boasts a wingspan of 1800 mm. To create the Buratinu, I designed it for a more modest wingspan of 1300 mm, incorporating slightly more sweepback. The video showcasing the Buratinu can be found on YouTube at youtube.com/watch?v=HTmxjgw0Mq4&t=165s. For a detailed understanding of its development and numerous images of its components, visit rc-network's forum at rc-network.de/forum/showthread.php/682097-Drohne-aus-St-Petersburg-drucken. Recommended Print Settings: Attention! The wings are specifically designed to be printed with 0.5 mm width, four bottom layers, four top layers, no infill, and a single perimeter only. If you attempt to print thinner walls, the upper-side perimeters may not adhere well to the inner stiffening construction. Conversely, if you apply thicker walls, the perimeters might fail to produce a continuous turn. To achieve a smooth surface on the upper side, it's essential to build the layers as if printing in spiral vase mode. If dissatisfied with the results, experiment with 0.49 or 0.48 width in your slice settings. The choice of slicing software - Cura, Slic3r, S3D, or another - will influence the outcome. I recommend conducting some test prints before proceeding. The second crucial point is: When printing with lesser layer heights, the inner stiffening construction may not connect properly to the top and bottom layers, resulting in a gap between them. All wing parts should be printed with a layer height of 0.3 mm, 0.5 mm width, one perimeter, and no infill. Here are the specific print settings for each part: * W1, W2: Four bottom layers and four top layers * W3 servo: Three bottom layers and four top layers * W4, W5: Three bottom layers and three top layers * W6: Three bottom layers and five top layers For the elevon parts, use the following settings: * Inner elevon: Six bottom layers, spiral vase mode, no top layer * Outer elevon: Three bottom layers, spiral vase mode, no top layer * Elevon joint: No bottom/top layer, spiral vase mode All fuselage parts should be printed with a layer height of 0.2 mm and 0.5 mm width: * Fuselage 1: Three perimeters, twelve bottom layers, three top layers, and 40% infill * Fuselage 2: Three perimeters, two bottom layers, three top layers, and no infill * Fuselage 3: Two perimeters, two bottom layers, three top layers, and no infill For the access panel and bracket: * Layer height = 0.2 mm * Width = 0.5 mm * Spiral vase mode, no top/bottom layer Specifications: * Airfoils: Custom design * Wing span: 1300 mm * Wing chord: 480/140 mm * CoG: 113 mm * Overall weight: 1245 g * Wing weight (one side complete): 342 g * Wing area: 32 dm² * Wing loading: 39 g/dm² * Motor: Propdrive 28-36 1200KV * Static thrust: 1200 g (3S Lipo) * Battery: Turnigy 1800 mAh 3S 40~50C Lipo * Motor camber: Tilted -1.5 degrees