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- b-partstore (929)- Feedback left by buyer.More than a year agoVerified purchaseGood buyer, prompt payment, valued customer, highly recommended.
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Reviews (17)

Apr 02, 2021
Great little gyro for flybarred RC helis in the North Pole!
I have about 12 gyros of different brands. The most expensive, a very outdated JR from the year 2000, but it still flew very well, till I sold my Corona helicopter with it. The rest of cheap to moderately expensive gyros, just garbage! They did not hold the tail well, and lots of grief to set them to work correctly! Then, I looked into the Quark black and transparent case. So, got transparent case and put it in a 15yr old Hobby Lobby Revo CP 400 heli. I did not even set it up correctly from the beginning, and the gyro set itself up correctly right away (did not go through the proper steps to move the sticks, etc.) Flew the Revo and held the tail in place, even though the Revo has terrible vibrations (my fault), which I now have to fix. But it seems I don't have to worry about the tail giving me problems!!!
Another Quark is going into the Trex 250 and so forth. I am in the north, and the temperature here screws up gyros big time, I have found out! Even the Rapid City, SD, hobby store there, has a dozen or more of the older gyros and they are selling them for cheap, but they are not worth it, like the Quark, it seems. Perhaps if you live in more temperate climate, the southern areas, you may have better luck.

Aug 14, 2019
Symma only, great toy.
Symma helis are great for beginners only. Too bad no replacement gears or such available. Great toy, but not hobby grade. After a while, internal heli battery gives out. Do not recharge right after flight. Let it rest 10min or so.

Sep 10, 2019
Cheap, Smaller: Not a good tail rotor blade for clone or Trex 250 heli.
I have an HK 250 Trex clone and the clone comes with 2 sets of tail rotors, one is square end and the other is curved. When you fit the KBDD 4025, 26, 2X next to the HK blades they are flimsier and smaller. I do not recommend these KBDD for Trex 250, since I also have parts for the real deal. The Trex is beefier and bigger compared to these cheap plastic blades.