Inexpensive, works great on TT, OK durability
I've been learning on the Tiny Trainer; I got two of these and two equivalent ones by HQprop. The seem to work the same. I think these ones are slightly more durable, but that said I went through all 4 props in as many days, though in a mown field (so a little longer than a lawn) I can usually avoid breaking the prop so long as I don't really nose-dive. Time to stock up again, and learn to catch the plane!