Gemfan brings you the new 40mm Tribladed prop, this brings high efficiency and with minimal thrust loss, this is a great prop for your Mobula 6/7 or Mobula HD or any 75mm frame.
Below is a motor test showing current and thrust lines, the graff below for the purple(3 bladed Gemfan 40mm) and blue(4 bladed Gemfan props) on Boost Juice.
You will see the current draw is low and thrust is very close to the rest of the props.
One prop: 0.3174g
Four props: 1.6006g