Finally got a big space near Basundhara at police training ground. My very first experience in flying rc plane.
For the Power Pack I used 30A ESC, 1000KV motor, and DIY 18650 3cell Li-ion Battery pack. The cell was from a dead laptop battery that`s why it did not give constant power due to its high internal resistance. The voltage dropped from 12v to 8v at full throttle gradually affecting the rpm of BL motor.