Hi Folks


I am building my first ever kit (an LT40) following the directions in this wonderful thread. However, I have run into a snag.


I am at the point where I am test fitting the W5 ribs. The main hardwood spar has been doubled with the shorter balsa piece. The WS-B2 sheet is glued in. The 36 x 3/8 x 1/4 balsa rear spar is glued in, the WS-B3 sheet is glued to the rear spar and the trailing edge.


However, when I try to do the test fitting with the ribs, they fit fine on the main spar, but I find the rear slot on the ribs is both too shallow and too wide for the rear spar.


I had problems determining how to orient the rear spar piece. But it looked from the plans and the thread photos that it should go with the 1/4" surface against the table, making it 3/8" tall. It fit the best on the plans that way, and the photos seem to show it that way. But the rear slots on the ribs won't accept it the other way either, the slots are not wide enough.


So did I glue the rear spar in wrong (should it have the 3/8 face against the table?), or do I have to cut the slots in the ribs deeper for every single rib?


Thanks in advance for any help!