Hi, I use them for other alloy sheet, but found a supplier doing 12' x 4' sheets, d-box is 24" wide, and the wing is now 14ft so can get away with 1 sheet and a fill-in piece.
Hi Pwood, If I recall the Ercoupe wing is metal ???, where the LMA is fabric, so the fabric would 'scallop' aft of the smaller d-boxover the ribs."For some reason that I can't figure out the 'designer' of the LMA decided that the Leading Edge/D-Box dosen't run from the capstrips off the top and bottom of the mainspar..."
Neither did Fred Weick, designer of my Ercoupe. Off hand I'd say that it got most the tortional stiffness from the bend at the leading edge.
The early Ercoupe wing was fabric covered.
Getting back to the LMA, me and my co-builder had a meet this morning and will be going for the 'full D-box'option, using the original smaller skins to be reused as the fill-ins where our 12ft new skins will be short by 2ft, pics to follow soon.
Hi pwood, Nick Onn called me earlier today, & when lockdown is over ????? he said to pop over to his airfield where he keeps his brace of Sukhois. Keystone Heights.Excellent, sir. Adapt and over come! Onward!!
Thanking you in advance for the pictures.