Instruction manual

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VII. INSTALLATION OF THE CLUTCH, FAN AND ENGINE ASSEMBLY (INCLUDING GUIDELINES
FOR ENGINE AND EXHAUST SELECTION)
Bags Required: #7A through #7F
Tools or Materials Required:
M2.5 and 3.0 Allen tools
M5.5 (7/75@) flat wrench
Light oil
AThin wall@ (12 point) socket and ratchet to fit the crankshaft nut of your chosen engine
6.0-7.0mm (1/4@) diameter wooden dowel of minimum B 75mm (3@) length
Small Phillips screw driver
Sharp modeler=s knife or Dremel tool with cutting wheel
Cyanoacrylate (CA) or silicone glue
Central Guidelines to Assist in Properly Handling the Engine and Fan Hub Assembly:
Always remove the carburetor to facilitate safe tightening of the crankshaft nut (the only exception being the Y.S.
engines
which should, instead, have its crankshaft secured through removal of the crankcase backing plate). Use a
wooden dowel or 6.0-8.0mm (1/4@-5/16@) in diameter to secure the crankshaft during the tightening of the crankshaft
nut. Additionally, the kit includes a flat plate #0546-21 to be attached (via the included M4x12 bolts) to the top of the
fan hub so the fan is not damaged. Never use the fan blades as a device to grip the hub. Never use any device that
secures the crankshaft by contacting the top of the piston as this can damage the engine.
Always use the proper socket to fit the crankshaft nut. NOTE: Most Sixty thru .91 engines with larger diameter
crankshaft require Athin wall@ (12 point) type sockets due to their larger crankshaft hex nuts. Do not use any nut other
than that supplied by the engine manufacturer.
All Fury kits utilize a Adual collet@ system to secure the fan hub. In all cases, the engine=s factory installed drive hub
(along with any factory Woodruff key, collet, or washer) are to be removed and not utilized. It is recommended that a
very light coat of oil be applied to each brass collet (supplied with your kit) to improve its fit into the fan hub.
Additionally, the fan hub should be rotated about one turn (with light tension from the crankshaft nut) upon the collets
to improve the contact.
Guidelines for Engine Selection:
The following engines are best suited to your kit:
O.S. 91H
Y.S. 80H
Y.S. 91H
NOTE: If desired the Tempest can be flown using a .61 size engine with no problems, however a gear ratio change
will be required. If you wish to consider other choices and have questions, contact Miniature Aircraft USA for
assistance.