T-27 Tucano 20cc 1.2 2022
10
Place the engine mount in inverted position (upside down) with the 4 10-
32 x 1 ¼” screws with washers inside
the holes through the square 10mm plywood part and the firewall until the inner side at the fuselage. Thread
the 10-32 blind nuts on the 4 screws and tighten until the blind nuts gets stared at the firewall by the inner side
of the fuselage. Position the engine to the engine mount to obtain the throttle pushrod passage location,
marking the point to allow pushrods passage without obstructions or curves. Mark the throttle command
location. Remove the engine. Loose the 4 10-
32 x 1 ¼” engine mount fixing screws and remove the engine
mount. Drill 5mm hole on throttle passage marking. Apply 30 to 40 minutes epoxy glue around the blind nuts
through the inner part of the fuselage to strengthen the plywood on fixing points to avoid the blind nuts to turn
when tightening up the screws. Wait until full cure.
Above: 10-32 blind nuts stared to the firewall from the inner side (left) and firewall with screws and washers
securing the engine mount (right).
Screw the 4 10-
32 x 1 ¼”
screws with the engine mount into the blind nuts through the firewall, ensuring a
solid, firm fixation with parallel alignment between the 4 screws. It is advisable to attach the throttle control
pushrod to the engine before definitively secure it to the engine mount. We recommend DUBRO Laser Pushrods
(DUB 500 or DUB 501) as they are flexible and easy to install. If you prefer to use steel wire or another metallic
pushrod, there are no restrictions in the case of glow engines, as they do not have electronic ignition. Sand the
outer tube end of the pushrod with coarse sandpaper (80 to 120 grit) to ensure better adhesion and stick it to
the firewall in the hole with 5 minutes epoxy glue. Mount the link to the inside of the pushrod ensuring it is
secure and connect it to the engine throttle control horn. Important: The plastic parts of the pushrods must
stay inside the firewall due to the heat of the engine. Connect the silicone tube to the engine's fuel inlet. Pass
the silicone hose and pushrod through the holes in the firewall. To define the exact position of the engine on
the engine mount
, check the section “Installing the engine
cowling
” and observe the measurements:
Distance between the firewall to the propeller washer: 167 mm (length)
Distance between the engine´s center shaft to the end of engine´s head: 81,3 mm (height) (OS 95AX)
The 2-stroke glow engines are designed with very bulky exhausts and positioned on the side of the engine,
which becomes a big nuisance when you think about the scale and realistic appearance of a model aircraft. We
recommend the use of an inverted pitts muffler, for installation at the rear of the engine with the exhaust pipes
positioned downwards, maintaining a good appearance of the aircraft nose and reducing the noise level emitted
by the engine operation. Be sure to purchase a model sized for the engine to be used.
