Stealth propeller Ⅱ『Grunau Baby Ⅱb』 - mechanism

Grunau baby Ⅱb 1/5 - Thermal studio Detaiils of the mechanism : 「ラジコン技術」January 2022 issue https://www.rc-tech.co.jp/products/de... https://www.rc-tech.co.jp/products/de...