RCFREEK

Are the thunder tiger brushless motors any good? I installed a 4-12 amp motor on a 350gm bipe with a 3 cell 1050mah lipo pack. It doesnt give good vertical. hovers at around full throttle. im new to electrics. what am I doing wrong? pls help. ESC is blue arrow 18 amp.
a friend of mine has a 250 gm monoplane that flies gr8 on a axi 2208/34. is my motor underpowered or is there something wrong with my battery? could it be a bad ESC?