The T-Rex 250 was my first helicopter that I build. All my other helicopters were Ready To Fly Out Of The Box helicopters. With all the setup and pre-flight checks done, I was ready for my first test flight. Spooling up was very smooth with the speed controller set on slow start. At 50% throttle, my T-Rex 250 lifted into a steady hover. A few up elevator trim clicks were needed to let the helicopter settle down in a one spot hover. No rudder or aileron trims were needed. The T-Rex 250 is really quiet in the air for its high rotor head speed.

I was quite amazed that the setup was so accurate after following the T-Rex 250 manual for setup. Transition into forward flight was very good with no unexpected surprises. Coordinated left and right turns with aileron and rudder input was easy with no unwanted up or down pitching tendencies when rolling out of a turn. The pirouette speed with rudder inputs was not to fast and not to slow with the gyro gain set at the recommended 65% in heading lock mode (AHTCS ).

The blade tracking was perfect when viewed from the side with an eye level hover in front of me. Maybe I was just lucky, but no adjustments needed to be made to set the blade tracking. My first test flight went well without any hiccups. Can’t wait to explore the T-Rex 250 3D capabilities. Seven to eight minute flight times can be expected with the 850mAh LiPo battery, depending on the type of flying done.

Conclusion
The T-Rex 250 flies very well for its size. Follow the manual and all the basic setup procedures, and your first test flight will be successful.