ORIGINAL: dcgraphic
its realy tail heavy so wondering 1 where the COG point is on this plane and what do I use to bring the front in heavyer like on little planes you add a bit of wight I no that but this thing I would almost have to add a brick lol please help
OK Dc first off welcome to the forum. There are many times you may have a mystery airplane and no idea as to where you should balance it at. For that airplane which is a double taper wing a simple method to use is to find the average wing chord. So how do we do that?
Its easy just measure the chord (leading edge to trailing edge) halfway between the wing tip and the fuselage. Now take this figure and divide by four. This sum will be the distance you want to measure back from the leading edge out there halfway between the wingtip and the fuselage. All that left to do is project this point directly in to the fuselage to make it easier to balance.
This point is the 25%mac and a very conservative figure for you to start with since this may be a big jump for you.
As to how to make it balance at that point if the tail goes down as the others have said you need to move everything forward that you can. For some airplanes thats not always possible so on some I have used a weight box as in these photos:
John