Glow Engine Installation; Mount The Engine - GREAT PLANES Waco YMF-5 Instruction Manual

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11. Fit two 3/16" [4.8mm] wheel collars onto the elevator
pushrod wires. Use a drop of thread locking compound on
the screw threads and fit two 6-32 x 1/4" SHCS. With both
elevators centered, tighten the collar locking screws to hold
the two wires together securely.
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12. Mark the pushrod at the servo arm and make a 90°
vertical bend. Drill the second outermost servo arm hole
using a 5/64" [2mm] drill. Fit the pushrod to the servo arm.
Secure the pushrod with a nylon Faslink. Cut off the excess
pushrod wire. Install the servo arm screw.
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13. If you need to make any minor adjustments to the
elevators, make the adjustments at the individual elevator
clevises rather than at the collars. Remember to secure
the clevises with the silicone retainers when you are done
making adjustments.
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14. Use a 1/16" [1.6mm] drill bit to install the rudder servo
so that the outermost hole in the servo arm is aligned with the
rudder pushrod wire as shown. Note: The servo arm must
be positioned on the output shaft so that there is a 90° bend
between the arm centerline and the pushrod. Choose the
servo arm that aligns best and clip off the remaining servo
arms. Remember to harden the screw holes with thin CA.
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15. Mark the rudder pushrod at the servo arm hole and
make a 90° bend. Drill a 5/64" [2mm] hole. Install the pushrod
on the servo arm and secure it with a nylon Faslink. Cut off
the excess pushrod wire. Install the servo arm screw.
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16. Make any adjustments to the pushrod length to center
the rudder and re-secure the clevis with the silicone retainer.

GLOW ENGINE INSTALLATION

This section will cover the installation of an O.S. FS-1.20S-E
Surpass four-stroke glow engine. A two-stroke .91 sized
engine can be installed with a Pitts-style muffler. If you
are installing a different engine, please respect the firewall
to prop washer dimension of 6-11/16" [170mm]. Plywood
spacers are included that work with the two bolt patterns
etched on the firewall. This engine is best mounted with the
cylinder on the right side and the exhaust facing down.

Mount the Engine

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1. To install the O.S. FS-1.20S-E Surpass four-stroke
glow engine (or any engine using the supplied nylon engine
mount), drill the firewall at the four engraved "+" marks on the
firewall using a 3/16" [4.8mm] drill. These marks line up with
the two nylon engine mount halves that are supplied in this
kit. If you plan on using a different engine mount, please use
the vertical and horizontal centerline "crosshair" marks on
the firewall to line up the template that came with your mount.
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