Thank's all,

I have downloaded the convertion chart so I can have a go now, thanks Motorboy.

Just one last thing , is there a genral rule of thumb to approximate the lbs Thrust to wieght ratio for certain types of flying. eg;

1.2 X The dry wieght of the aircraft= approximate lbs thrust required for sport flying.
1.5 X The dry wieght of the aircraft= approximate lbs thrust required for 3A flying.

Thank's for all the help.