. It's from plans by Chris Golds (which I bought many years ago as a retirement project)and is estimated to be between 4.0-4.5k with IC engines. The original spec for these was 4 X HGK21's, an old derivation but the modern equivalent is avaiable. Obviously the elecs are lighter but then there is the added weight of the batteries etc. So until it's finished an exact weight cannot be determined. I am intending to use 3 bladed props as per the real thing although the plans show 2 bladed ones. Have done some research on this and it should be ok. I have been advised to use 4" props X 3 blades. If any one has a better idea on this, I am open to advice. Have read some of Timbo's replies to other peoples questions and he seems very knowlegable. If you know how to get hold of him it would be appreciated.-, unless it's just through the forums and then there's no guarantee he would answer.