Last week I tested the original fan/motor that came with the Twister. I placed the fuse with the fan installed and a 4 cell battery on a digital scale reading 980 grams of weight. I proceeded to apply full power and the scale read 1960 grams. That means that I got almost a 1000 grams of thrust. 1 to 1 power to wt. ratio. I ordered (from Turbine RC) and received my new 70mm CS XRP 13 blades fan 2600kV motor and ran the same test. Well, the results were quite disappointing. I only got about 600 grams of thrust from an engine/fan combination that the mfg. claims 1.36 kg thrust. Needless to say I'm very very disappointed. The sound was the only improvement. Not much comfort. I guess I'm putting the original fan motor back in.
Last edited by aeromax18; 02-14-2018 at 08:07 AM.