I am running a TJ pro because it was a lot cheaper than the Futaba GV-1 and it was the only other option available at the point I bought my governor. The small foot print is a plus point too. I was running the futaba S3001 and then the hitec 325hb on the throttle with this governor. Since I had the S9254 lying around after I sold the Gy502, I installed it in the throttle channel. I am running the Super servo mode which reduces the response time from 20ms to 4ms. While it sounds like an impressive improvement, I didn't really feel any difference. Rpm holding ability is good and it holds as good as my engine will ever allows. The sensor work extremely well and are very durable. I already had like 350flights on the box stock sensor and its still working great.
Requires a tach because there is no rpm read out, but fret not, a cheap airplane tach works with this because once the gov is engaged, it doesn't matter if you are on the ground or tic-toc in the air, the rpm is the same. What this effectively means is that you can tach the heli while its on the ground.
MY TACH SETUP(CLICK HERE)
Its even smaller than a GY502 sensor, so the GV-1 was like a giant to this...
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