Videos Adam Drake video: O.S. Speed B21 RD2 carburetor settings & updated cooling head janvier 2, 2024 by Chris Laisser un commentaire Adam Drake is back with another useful video where he gives the basic carburetor settings for the O.S. Speed B21 RD2 nitro engine. The Drake also talks about the updated cooling head. Source: Adam Drake (YouTube) PartagezTweetez0 PartagesAbout ChrisFounder of circusrc.com, journalist & photographer in the RC world for several years, Chris is passionate about RC, racing and technique. Whether in France or in the world, he is trying to bring high-quality information and photos for enthusiasts... and make you want to join the world of RC!