Hi Claude and yacsf,
I have got my hirobo bell 47 G test flown for the first time!! I was so excited and it can hover !
I have uploaded the video at this
http://www.youtube.com/watch?v=4J57qiOQzdA
I feel great because of few points:
(1) I have heard people saying the older hirobo engine (20c.c.) is underpowered even to hover, but at least it was fine yesterday!
(2) It flown with my first hand made wooden blades! I have been sanding a lot in order to get the blade sanded to shape, balanced and reinforced.it works! It is the test pair, I might get a carbon pair in some times when i saved enough...

(3) Of course, this is my first gasser. it has been on display only by previous owner so I feel really good to let her in air!
(4) great help from people on the forum, well done foks!
Lawrence