Well, surprising enough I have been finding time
off and on to continue building on the Sailplane. I drilled and threaded two
pieces of 1/8" plywood for 2-56 screws and integrated them into the base of
fin root as shown below.
I cut out two pieces of 1/16" sheet plywood and
glued them to the bottom of the stab's center section as shown below. Three
holes described below were drilled in each piece before the plywood was
glued to the stab.
This picture shows the two 2-56 countersunk
screws holding the fin structure in stab center slot.
This shows a close up of one of the 2-56
One-half inch squares of 1/8" plywood were glued
to the top of stab's plywood pieces and threaded with 4-40 size threads as
shown below. Notice the triangular bracing on either side of the stab slot
This shows the bottom of the stab center section
planked with 1/16" sheet balsa back to the stab's rear spar.
This is a good shot of the bottom of the stab
showing the undercambered planking on the center section. The fixed portion
elevator's center section still has to be added.
To maintain proper undercamber contour, a jig was
made with the top of the jig runners to fit the undercamber contour of the
stab's center section rib as shown below. Notice the two notches made to
straddle the bottom of the yet untrimmed rear spar.
This picture was taken to show how the jig was
clamped onto the stab to locate and set the proper angle of the fixed
portion elevator's center section while it was being glued in place.
This shows the fixed portion elevator's center
section glued in place on the back of the stab's rear spar.
This shows the elevator
carry through fitting made to connect the two sided of the elevator through
the fixed portion elevator's center section, which is composed of 1/16"
piano wire in a brass tube that serves as a bearing.
This shows the elevator carry through fitting
glued in place inside the fixed portion elevator's center section.
This is a close up of elevator carry through
fitting once the fixed portion elevator's center section had been completely
planked on the bottom.
This shows the bottom of the stab with the
undercambered planking on the complete center section including the fixed
portion elevator's center section.........................Tandy