I'm currently working on a 1/10 scale model 747 and C-5 gallixy. due to my quest to make these planes as much to scale as possible so I was thinking 4 turbines for each plane. I'm not shure exactly how much they are going to weigh, but it's bound to be a lot. I was thinking of turbines with any where between 12-50 lbs of trust. What do you think ?