RE: Nelson 40 or jett50
The delta that I am holding is called a "Rapier" and was originally a kit manufactured by a British firm called Balsacraft. Later it was manufactured as an ARF but the ARF would not have held up to the power of the Nelson Q40. I started with the basic kit and strengthened it throughout with carbon fiber reinforcement and fully sheeted the airframe. Deltas are fine for straight line speed but do not lend themselves to turning well at high speeds unless you have the CG perfect. Once you get the CG set they are quite responsive but if nose heavy they are hard to turn. Tailheavy and you have got a real tiger by the tail. The model was ungodly fast with the Q40 and ST 4500 RC carb. Good thing I had a carb on it because I had to back out of it to get it to turn. If I wanted to keep the power on I had to do "Split-S's" which is my manuver of choice for a high speed model. The model had the illusion of accelerating in a turn. Rolls were unbelievable and perfectly axial.