Helicopter Blade Sketch Notes

minimalistic hand-drawn sketch on a notebook page. The sketch features simple, clear outlines of helicopter blades. Annotations are written in a simple handwritten script with arrows pointing to specific parts of the helicopter. The background shows faint notebook lines and subtle imperfections like small tears or smudges. The overall style is organic and sketch-like, with minimal shading and a focus on clarity and simplicity. Include a few brief scientific notes and a date at the bottom of the page, resembling an authentic scientist's notebook entry --ar 9:16 Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.