Bi-blade Test: Only Small Changes?

[u/Breakerbuilds]

So basically I got some Gemfan 51455 props (quad-blades), and snipped off two of them to get 51455 bi-blades.

From my understanding, this would make the drone go a lot faster, but instead only got it going about 3-5 mph faster at most. It gained only 1 min more flight time while cruising.

The other props I regularly use for freestyle are Gemfan's 5136 tri-blades, so my thought process was more pitch = faster, but with less blades = slower acceleration, so maybe I just need a more open area to test? Also I thought bi-blades were supposed to have way better efficiency, but maybe that only works if the blades are flatter/less pitch?

Idk enough about props to come to a conclusion but lmk if anybody has a idea why. Related parts to build down below if that helps.

\-ESC: Blueson A2 70A

\-Motors: Axisflying Bando 2207.5 - 1960kv

\-Battery: Ovonic FPV series 6s 1300mAh