i use this 23x8 prop on my da-50r and is a great prop. alot of thumbs up FROM THE CLUB !!! im running my da-50r on my PilotRC SBACH 29% with MUCH POWER AND VERY LITTLE VIBRATION!!! BALANCING WAS GOOD, BUT JUST MAKE SURE YOU CHECK IT BEFORE INSTALLING AFTER DRILLING MOUNTING HOLES!!! Excellent 3D power!!!! speed is less but power is there all the way. ******Make sure you use a Good drill guide, the guide from hobbyking was NOT straight through, HOBBYKING DRILL GUIDES SUCK!!!****** GET A GOOD DRILL AND USE ON A DRILL PRESS**** prop is very strong and great for 30% / 50CC GAS AIRPLANES. ON ONE OF MY LANDING ON A WINDY DAY MY PROP TOUCHED GRASS AND STOPPED MOTOR, NO DAMAGE WHAT SO EVER, VERY STRONG PROP!!!
Back of the hub is not flat. Difficult to be balanced. Imbalance across the leaves.
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Please be aware that this prop is not balanced. The lateral balance (at the tip) was out by 1 gram and the hub was out by a massive 4 grams. This is a lot and if not corrected will run the crankshaft bearings out in no time at all. Also will cause a lot of general high pitch vibration in the whole airframe plus makes the prop noisy. I had to resort to drilling holes in the heavy side of the hub. All other makes of carbon prop I have bought have been spot on wit balance. Also the finish was covered in small air bubbles.