Thanks to the nylon material used in construction these propellers offer increased performance and efficiency making them perfect for your multi-rotor project. These 9x4.5 inch props are incredibly stiff compared to other plastic propellers available and are precision molded to ensure optimum balance from the factory. They feature multiple prop adapters to enable these props to fit any prop shaft from 3mm to 6.5mm diameter.
Diameter: 9 inch
Pitch: 4.5 inch
Hub Thickness: 7mm
Shaft Diameter: 3~6.5mm (with adapters)
Weight: 9g each propeller
Note: These props are for electric use only.
Unit Weight (g):
This is propellers the worst quality what I've ever seen. All is very bad, uneven, many deburring plastic, not all the O-rings. Guys from HobbyKing if we read my message please delete this is product from your price list, to other buyers do not make such mistakes as I.I got these today. There was lot of loose plastic around. I trim these to look nice. I balanced properly. And these fly like sh**, really these DO NO WORK. I almost flipped my quad. It was only pure luck that i avoided chrash with moped.
I want my time back... and money!Was not happy when I pulled these out of their pack. There was flashing still attached to the props. Once I put them on and spun up my quad, I could see that there was a considerable amount of vibration on one of the props.
Not helpful.These propeller are ok for beguiners were you brake one each time you take off. very inexpensive.These are rubbish as everyone says. no more balancing needed than any other prop but provide no thrust. Quad copter required about 20pcnt more throttle to hover compared to different props of same size.The worst props i have used in my planes. Extremely unbalanced. My quad did not leave the ground.... don't waste your time and money...good quality for self built multiGreat props. Work very well with my quad. Pretty durable.So I became the proud owner of these things. My first night of love was not so bright compared to attempting to install this propeller on the motor. I used a kilogram of adhesive tape for balancing the propeller. But it did not help.Prop has a horrible twist. Propellers made people completely unfamiliar with the science of aerodynamics.I've tried many props and these take first place from the bottom of the list. Absolutely amazing fit in the trash can where they belong and their colour blends in well too with the garbage bag.
Very poorly balanced. They're so bad, that you can feel a few grams of pressure on your finger with them in the balancer.
Their curvature is poor too and there are rough and soft edges all around due to the poor molding.
I recommend spending your money on similar shaped props from the brand HQProp. Their quality is in a completely different class to these knock offs. Even better yet, try Graupners or T-Motor propellers. Anything but these.