Solo props builds blade sets and hubs that more or less match the profile of certain 3 and 4 blade equipped machines, Mustangs, Corsairs, Thunderbolts, etc, and uniquely, you vary the pitch at the hub, it is adjustable. The problem is, they don't do it for the smaller planes. The Evolution trainer prop is a 10.5 x 3.5 (according to Horizon), and it flies the plane fine for training, and yes, it does slow down the plane well for landing.