RE: crash
Hi
Several people have turned up at the field with these types of planes. Some flew ok, some were faulty and some didn't fly at all. most had already been crashed. The succsesful ones all needed balancing trimming and genrally adjusting before getting them to fly.
Find a flying club and get somone experienced to have a look at it for you.
The twin engine ones that use the engines for steering normally you can increase the power to either side depending which way you want to go, not as you describe by shutting one engine down
Simon