Got the new props from T-Motor and gave them a shot. As you will find in the video content I settled on the 5147 for my flying style. Both props are well crafted and pretty stiff, perfectly balanced/tracking. 5146: Felt sluggish hard to spin up fast, produced propwash and slight oscillations(guess they resonate more), quite amp hungry. I would say they are good for racing/light builds/high torque motors 5147: Has that smooth feeling to it but not underpowered, good low throttle response, no propwash present except on extreme moves but even then they are barely felt/heard, no audible resonances/oscillations. I would say perfect for freestyle rigs with low kv Of course, I am nowhere near a prop expert and what I said was purely from my own perspective. Most props these days perform somehow the same with marginal differences. Only things to consider in my opinion is price, durability, response over the throttle range, not self-resonating, vibration frequency. Rig: ImpulseRC Reverb 5" ImpulseRC Wolf PDB KissFC V2 KISS 32A T-motor F40PRO 2400 KV Unify Pro (@800mw) Crossfire Micro RX Foxeer Predator Mini Lolipop UFL Goggle: Fatshark HD1 RapidFIRE module Transmitter: Taranis X9D Crossfire TX@500mW TBS Diamond Batteries: Acehe 1500mah 75c 4s Tattu FunFly 1550 100c 4s HD Camera: GoPro Hero7 Black Please press that subscribe button for more content! #FPV #tmotor #fpvprop ... https://www.youtube.com/watch?v=OjVK_06Ru8E