It works fine on my CopterX 500 helicopter. Cheap and reliable.i bought 2 pairs for my 4 bladed head trex 500. The blades where perfectly balanced but not between the two pairs... one pair was preatty heavyer. I tryed on flight... the flight is perfect but i don't know if it can give problem we'll see! Definitively if you need to use just one pair at time, those are perfect. Well finished, balanced and silent.bonne pale bien equilibrerOne blade came with scuff marks as though "sanded". The blemish could still be clearly seen. This sanding totally removed the gloss from that area of the carbon fiber [top of blade] The other blade had a long [3"] scratch in it, on the top, as well as a small nick. They actually weighed exactly the same, although they did not balance and one blade required tape at the blade CG. The blades are very stiff and fly as well as the 430mm fiberglass blades I was using, if not better. I used a black sharpie to disguise the blemishes and black out the silver Turnigy logo. They are good blades for the price.Great blades! Ordered 2 sets to put on my newly installed 4-blade head for first flights. Both blades in each set are exactly the same weight and only one gram difference between the two sets, 58 and 59 grams. They are also well balanced, the centre of gravity within the sets is almost exactly the same.Great blades at the best price ! I was searching for a long time such blades as replacement for a very old Kyosho Concept 10 originally equipped with crap foam blades (like EP Concept, but 4cm longer). Weight is not a problem (something like 12 gr more per blade), the heli flies well with the Turnigy. No more "variable" tracking like with the foam blades. The finish is nice, and they were well balanced. Second life for my Concept 10 ! :)Fly these on my T-Rex 500. Great blades, nice finish.
Need the shims from the T-Rex kit, though, shims are not included.
Perfect for the price.Blades balance nicely, but the finish on them was dull in some areas and glossy in others. I was able to polish them up but they came looking very inconsistent from the factory. Good blades for the money though!
Great blades, light weight, nice finish and are well balanced.
They are too thin for the HK500GT blade grips and no
shims are included so loses 1 star. First flight with them was
good with no dramas and for this price you can't go wrong.