>Don't know what "firewall f.s." is, but you don't need anything to do a WB. >Pick a datum, I used the firewall, and measure everything from that point. >There are spread sheets on the site to help you with this. >Daniel R. Heath ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The critical information you need is the location and range of the CG. You can pick any point to take your measurements from. I picked the front side of the prop flange so I was working with only positive numbers. Also, if the fuselage length was changed from the firewall to the forward spar, it would give you false numbers. The KR2 has the CG location and range in the area of the forward spar. I would think the KR1 is similar but find a set of plans an get the corect info. Larry Flesner
