Sikorsky X2 Coaxial Helicopter Sets New Speed Record by acoollink | Oct 26, 2010 | Cool Machines Videos, Technology VideosThe Sikorsky X2 coaxial helicopter reaches a speed of 250kt.The average speed for a rescue helicopter is at 150kt so watch it as it sets a new speed record on 9/10/2010. Share on Facebook Share Share on TwitterTweet Share on Pinterest Share Send email Mail Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *CommentName * Email * Website