Dene Something to consider and that has been discussed in the archives previously.
If you raise your rear centre spar above the lower longerons by about 5/8" and leave the main centre spar sitting on the longerons you can obtain the following advantages: 1.. A reduction in angle of incidence of the wing (chord line relative to firewall) from about 3 1/2 degrees to 2 1/2 degrees. This reduces the nose down look that KRs have in level flight. 2.. A reduction in the decalage angle (relative difference betwen wing and tail plane incidence). This reduces drag. 3.. A gap under the spar so that you can run a elevator push rod under your seat from the bottom of the stick to the bell crank behind the spar. To set the washout at the wing tip I used the outer ply rib tacked with a single brad to the centres of each outer spar where intersected by the chordline and then just lifted the rear one until the appropriate washout was achieved. Followed by support and then glueing. Maintain the support until your skins are on and set to avoid the sagging problem. Regards The Martindale Family 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA phone: 61 2 66584767 email: johnj...@chc.net.au
