15
This is what makes a JAE a JAE… Sponsons are similar.
Engine rails glued in 3 inches in front of bulkhead 2.
Engine bay with lower tri stock in place.
Glue the forward bottom in place with
epoxy. Be sure to sand the angle into
the aft sheet so that it matches the tub
sides. The forward bottom sheet should
cover the bevel on the aft sheeting and
be left square. Do not sand the rear of
the forward sheeting; it needs to have a
sharp edge for the water to shear off.
See drawing.
Using epoxy, glue the two maple engine
rails in place, 3 inches in front of the
middle bulkhead 2. Note that the engine
rails are not square (3/4x5/8). Be sure to
lay them on the ¾ side (they are 5/8
high)
Allow to cure.
Fit and glue the ¼ balsa tri stock inside
the tub bottom.
Cut the ¼ balsa tri stock as follows:
(2) 13-1/4
(4) 9-1/2
(2) 5-1/2
(2) 3-1/4
(2) 1-1/2
Cut the longest pieces first. See cutting
guide in back of this manual.
These are slightly long. Trim for an exact
fit in the radio box and engine area.
Use the two pieces of 5/16x4 balsa tri
stock to reinforce the transom on each
side, inside the tub.
Save the scrap balsa tri stock for the
throttle servo mounts.
Install your engine on its mounts, then
set the engine and mount in place on the
engine rails.
Find a nail or a metal rod that slips into
the collet.
Use this to make sure that the engine is
aligned with the hole in the rear
bulkhead.
