Len Steyn wrote: > Using the full scale template's, draw the spars in. Measure from the top or bottom inside the distance to the cordline where it intersects the spar. Transfer this to the actual spars. Connect the two points by drawing a line on the fuselage. Setting the firewall to vertical, measure the incidence angle in this line.<
Sounds like a plan to me. Keep in mind though that your firewall probably isn't vertical with comparison to your fuselage (of course it depends on where you check the fuselage). Dan Diehl recommends you put a 2 foot level on your top longeron centered between forward and aft spars and use that as level. One bonus is that you can always get there to measure, unlike your firewall after a bunch of stuff is attached to it (I've finally lived long enough to have that problem). Check each longeron and if they are different, decide which one you're going to use and stick with it. And the longeron is more representative of how the plane itself will be flying, rather than the firewall. Having said all of that, a lot of people have used the firewall and they are doing just fine. It's probably just personal preference, until somebody figures out what angle the fuselage is optimally supposed to fly at anyway... Mark Langford, Huntsville, Alabama N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford
