This has a 6 ft. Rotating wing with a 6inch span from lead to rear edge.It is made of re-infoced foam.I am looking for suggestins on motors a speed controller that can run both.It is critical they perform the same.I have tried varying the voltage with a variable resistor for auto use with no success.I am also looking for people to help with the assembly of a full sized prototype.Hope ther are people that are enthsiastic about this as I am.The people I have talked to are very critical.But,one person asked me if the top wing was going to spin all I can say to that is daa.I built a trike ounce from a 501 cubes front wheel drive.I just removed the buper and extended the forks out font.But before I did that people were asking me how I was going to it and alot of people thought I would have to drive it in reverse .Sometimes people can't understand the simplist things? Hope the Helicopter Guys aren't offende? Again Hope to hear back from someone? Charlie Here is a picture of the prototype I am upgrading