The Arrows Hobby Blue Marlin 64mm culvert machine is smooth in shape, has little wind resistance, looks good with a crisp coating and looks good, and is of good quality as an entry-level exercise machine. In terms of assembly, this is also very simple aircraft, the size of the aircraft is also very small (wingspan is only 900mm), it is very convenient to go out to carry! Flight feel is also very good, rudder responsive, action execution, no shaking, no void. It is recommended to set the bar volume curve, flying can be very delicate. Original power, the use of 3S lithium battery thrust greater than 0.7 less than 0.85 (practice take-off and landing, route optional 3S2200), the use of 4S lithium battery is greater than 0.8 less than 1.0 (practice action recommended 4S 2200), the overall power performance is also good, full throttle electrical adjustment is also pulled up, can easily pull out the elevation angle take-off or landing posture. The positive lift force is stable and the acceleration reacts quickly. It is also worth mentioning that the aircraft's own flaps also performed well, with significant deceleration and increased lift. The landing frame is moderately rigid and the smooth landing is not easy to bounce.