Model Tech P-47 Thunderbolt Instructions For Final Assembly page 31

Before continuing you should decide in which direction you want to mount your engine. The direction you mount your
engine is strictly up to you. You can either mount the engine sideways (like we show), inverted, or at a 45º down angle.
Whichever direction you decide to mount the engine make sure that the center of the engine's crankshaft lines up
where the horizontal and vertical lines intersect. This will ensure that the crankshaft will be lined up with the cowling
when it is installed later. Keep in mind that mounting your engine sideways will result in easy engine operation and
requires only cutting a hole in the side of the cowling for the cylinder head. Mounting your engine inverted sometimes
results in more difficult engine operation, but hides the engine completely in the cowling. Mounting your engine at a
45º down angle results in easy operation and minimal cutting of the cowling, but it is more difficult to line up the engine
on the firewall.
The following procedures show mounting a Magnum XL .61ARNV engine sideways.
Using a ruler, measure the distance between the holes in the two engine mount beams. As an example, for the
Magnum XL .61ARNV engine used in this model, the distance between the holes in the two beams is 2". Your
measurement may differ if you are using a different size engine. It depends on the width of the crankcase.
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Using a ruler and a pencil, measure and draw a vertical
line 1" to the right of the vertical centerline.
Using a ruler and a pencil, measure and draw a vertical
line 5/8" to the left of the vertical centerline.
Temporarily glue the two engine mount beams to your
engine's mounting lugs using a couple of drops of thick C/A.
The location of the engine is not important at this time,
but be sure that the beams are parallel with the engine
mounting lugs.
Divide the measurement found in the procedure above
in half.
Measure this resulting distance and draw one horizontal
line above and one below the horizontal centerline.
As an example, if using the Magnum XL .61ARNV, you
would draw the two lines 1" above and 1" below the centerline.
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