Scuff the Hardpoint. Then apply JB around its circumference (Do not apply adhesive to the inside of
the motortube or it may drip down). Insert the hardpoint into the forward end of the motortube. Fully
insert and then insert an additional
!
”. In other words, leave a
!
” space between the top of the
Hardpoint and the top of the motortube. Place a generous bead of JB Weld around this
!
” space. Be
sure no adhesive drips down into the motortube, past the Hardpoint (see Figure above right).
The Fireball
The Fireball is tied to the eyebolt on the Hardpoint anchor. Tie it such that when stretched, the top 1/3”
of the ball sticks out past the top of the airframe. The distance from top of the Hardpoint to the top
1/3” mark on the ball (when stretched) is about 19 or 20”. This measurment varies slightly, so you
need to figure this for your own application. It may take several attempts. Once you are satisfied with
the installation, drop some thin CA glue to lock the tied knot on the eyebolt. This is important because,
again, this area is not accessible after the kit is complete (see Figure above right).
Final Assembly of Booster:
Now it’s time to epoxy the fin canister to the airframe. Medium set epoxy (30 min) is recommended
for this procedure.
Apply a ring of tape around the tailcone as per Figure below left. Apply some Vasiline or similar
product on the tailcone in the area between the tape and the forward edge of the tailcone. This protects
the tailcone from drips of epoxy.
