Brief Description: Horizontal Stabiliser Assembly - Front Spar
Separate the two HS-00001 spar doublers and draw the rivet lines as shown in the HS-00001 Detail View. Place the two HS-702 front spar channels on a work table, end to end, with the flanges facing down. Cleco HS-710 reinforcement angle, HS-714 splice angle to the two HS-702 spar channels.
HS-702 has been designed for use on an RV-8 and will require extra trimming for use on an RV-7. In order forthe spar to be bent to match the HS-710 and HS-714, the spar flanges inboard of the bend line must be removed.
Lay the spar on the workbench with the flanges facing up and mark the bend line on the spar as shown in the HS-702 Front Spar Tab Detail.
Drill a #30 relief hole 1/8” inboard of the bend line and centered on the bend radius of the flange (See HS-702 Front Spar Tab Detail and HS-702 Front Spar Tab Detail). Turn the spar over and enlarge this hole to 1/4" using a unibit.
Trim the inboard ends of the HS-702 flanges as shown in the HS-702 Front Spar Tab Detail. Be sure to only trim the flanges down to about halfway along the bend. Flatten the remainder of the bend.
Bend the tab as shown in HS-702 Front Spar Tab Detail using a hand seamer or blocks of wood.
Clamp the HS-00001 spar doublers to the HS-702 spar channels. Position the top edge of the doublers flush with the top edge of the spar channels. Position the doublers left and right from the center line of the horizontal stab as shown in View B-B. Match-Drill #30 the inboard holes shown in Vew A-A. Cleco the doublers to the spar.
Drill/match-drill all the holes inboard of the HS-00006/HS-00005 rib attach points (See View A-A). DO NOT drill the holes that will attach the HS-00006 and HS-00005 ribs or the holes outboard of the bend line. The holes outboard of the bends will be drilled later, after the bends are made. Also see Figure 6-6.
Remove HS-710, HS-714 and HS-00001 from the two HS-702 spar channels. Taper the ends of HS-710 and HS-714 (See HS-710/HS-714 Taper Det).
