I haven't gotten that far yet, but they claim it to be 8-9lbs. They also claim the Saito 120S will hover it. I am going for a smooth IMAC type flyer instead of a 3D machine so weight isn't my top priority. Hopefully it won't come out like a lead balloon. Only additions I need to make are some extra beef around the firewall and tail struts for added security. That shouldn't add alot of weight if I do it right.