Quantity   Component name
1 × metal gear digital servo https://www.amazon.com/gp/product/B071GQ6TP7/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
1 × dc gear motor for tail rotor https://www.amazon.com/gp/product/B071F4TJ2S/ref=oh_aui_search_asin_title?ie=UTF8&psc=1
1 × snowmobile bearing