I didn't buy these directly but they were the servos for the rudder and elevator in my Bixler 2. One of these caused my Bixler to crash! I was doing onboard recording of some stunts, and I was in the middle of a spiral when my plane decided to stop spiraling which made me crash. Post-crash investigation, all servos working except the elevator servo which wouldn't maintain input (with elevator stick held back 100% on radio servos would glitch on and off input). Seeing as the other was for rudder which I almost never use, that's at least a 50% failure margin
The elevator servo is exposed when you land, because the elevator may get a ***p that damages the servo (happened to me, was lucky to detect it early in the air on next flight and could land OK). I have actually worn out one HK15178 too (have stabilizer on my Bix so constant servo movement). In that case the ele servo moved OK when moved away from neutral both directions, but it shook like crazy when close to the neutral point (probably worn out feedback pot). Now I always check the movement of the servos before take-off (which I didn't before these incidents, bad boy). Maybe it would be better with a metal gear servo for the elevator, these servos strip easily when you hit something. After all, they cost 2 bucks, I'm amazed they work at all... So check them thoroughly before flight and don't put them on an expensive model I guess. Cheers!
The HK15178 is slightly bigger than the Nano-S servos, so you might have to do some small adaptation work to make them fit. But in general they should work well. I use HK15178 on the flaps in my Bixler 2, has worked great for a long time. HTH
Hi all, When HK was out of the HXT900 9gr servos, I bought several of these for projects. I've been using them with no issues and they work fine on my scratch built flat foam F-22 with a 30in wingspan.
Hi guys, let me rephrase my question. Will this servo do for flaps on a bixler 2? Also, how many servo reversers do I need for flaps on that plane? Last question, which spare parts do you recommend me buying for a bixler two. Thank you.
Yes, HK15178 works fine as flaps servo on the Bixler 2. You only need one servo reverser for the flaps, I use this one: SIG-REV. I have had some bad crashes, but so far have managed to glue the poor thing back together again. So I would say get some glue (e.g. Mucilage-L) and a hot glue gun, this will get you through most crashes. I have also stripped gears on a few servos and actually worn one out, so get some extra servos (the HK15178 strips the gears easily if you ***p a control surface in less controlled landings). I also got some proper hinges for the ailerons, 008-00201x10, and servo covers, OR020-00201. And don't forget servo extension cables, AM1043-15CM. HTH
Bought 5 pieces, despite this color as the glowing orange. to try. The price is excellent, although the color I disliked.
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Just received my servos. I purchased 5 of them and the price including shipping was the same as purchasing 2 Hitec HS-55 feather servos. Comparing these with the HS-55 they weigh in about 2 grams more that the HS-55. The case feels tougher than the HS-55 and I think will be less likely to be crushed when screwed in. I like the orange color and will purchase more in the future. These are great servos for the flat foamies people are creating. I plan on building a flat foamy soon to give these servos a workout. These are also great for small park fliers. Expect more orders once I show these of to my friends at our RC Club.
HobbyKing did great in bringing us these great servos.