Who made the first helecopter?

How do you make leather sofa less slippy? How long does a model rocket motor last? What is a reamer tool used for? How do you mount wood mantle onto fireplace wall? What is another name for a watchmaker? How did Ole Kirk Christiansen invent legos? What are hyperthermofiles? What do I charge for labor set forms grade lay concrete on a12x12x3 slab and finish concrete labor cost? How much do bridal show models make? What is a vhdl gold model? What makes an object move the way they do? Where does target ship from? How do you make a traditional Japanese house roof? How much does a maker shed cost on harvest moon ds? How can you make a skinny bottom tie? Any good combacks for when someone says Make Me? How do you make Working model on biofuel topic? How do you cut down a tree that is hung up? Can you use super glue on a hot hose? What is englishlads model Drew Daniels real name?