yup, tail rotor is needed or, you can use a coanda boom like the new Boeing MD 520's and 600's. They're fun to fly and work relatively well for what they are. If you want a comment on realism, ditch the split blades and stay with a solid blade. You may want to make the blades about 20% longer and move the rotor head just a bit more foreward. Also, a rod at the bottom rear of the tail cone (stinger) to absorbe the impact of a hotshot who flares too hard on landing as well as protecting the tail rotor (not to mention a good hand hold for ground handling of the machine). If you insist on split blades, then make them contra rotating which means one set higher than the other set. Not a good idea, but one that has been put into service before. hope this helps.