Engine Installation - Model Tech Fun Fighters P-51 ARF Assembly Instructions Manual

Table of Contents

IMPORTANT Double-check that the tail wheel is lined up with the bottom of the rudder. This will ensure that the tail wheel will track

straight with the rudder. If it's not, remove the tail wheel and bend the tail wheel wire until you're satisfied with the alignment.

❑ When satisfied with the fit and alignment, remove the tail wheel wire and use 220 grit sandpaper to roughen only the gluing

surfaces of the wire.

❑ Glue the tail wheel wire into place, using a generous amount of 5 minute epoxy. Remove any excess epoxy, using a paper towel

and rubbing alcohol, and allow the epoxy to set up before proceeding.

STEP 6: HINgINg THE RUDDER

❑ (2) Engine Mounting Beams

❑ (4) M3 x 18mm Machine Screws

❑ (4) M3 x 25mm Socket-Cap Screws

❑ (4) M3 Lock Nuts

❑ Thick C/A

❑ # 2 Phillips Head Screwdriver

❑ 2.5mm Hex Wrench

❑ 5.5mm Nut Driver

❑ Electric Drill

step 1: instaLLing the engine Mounting BeaMs

IMPORTANT The engine is mounted upright and rotated approximately thirty degrees off-center. Precut mounting slots in the

firewall are designed to allow the installation of different width engines. If you would like to install your engine in a different configuration,

you will need to fill the precut slots and drill new holes to match your desired engine mounting configuration. Scribe lines have

been etched into the firewall to help you line up the center of your engine's crankshaft.

When the engine is installed, it won't appear to be centered on the firewall. This is normal. The firewall has built-in down-thrust

and right-thrust, so the engine is installed off-center so that the crankshaft will line up with the cowl ring.

❑ Test-fit the tail wheel wire into the precut hole and groove in the rudder.

When properly aligned, the tail wheel wire should rest within the groove and

the front edge of the tail wheel wire should be flush with the leading edge of

the rudder. If it's not, you will need to cut the groove slightly deeper.

❑ Hinge the rudder, using the same techniques that you used to hinge the

elevator halves. The rudder is hinged using three hinges. The top of the

rudder should be even with the top of the stabilizer and there should not

be more than a 1/32" (.7mm) wide hinge gap.

IMPORTANT After allowing the C/A to fully cure, pull on the rudder

to check the integrity of the hinges. Apply more C/A to the hinge(s) if

necessary.