First of all i would like to say hi this is my forst time here. Ok i bought my grandson a 9012 R/C it was cheap at £20.00 i have fully charged it but it will not take off just tips onto its side both blades seem to operate ok. but now the engine is running even when i turn it off. I have had to diconect the main from underneath the body there was aso no instructions with it i wonder if anyone can advise please thank you Tom.