Thunder Tiger 9804 F-91S Four-Stroke Engine
This is the Thunder Tiger F-91S Four Stroke Model Airplane Engine.
Features
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Thunder Tiger 9804 F-91S Four-Stroke Engine
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CNC machined construction for
precise tolerances
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Front and rear ball bearing
supported crankshaft with Ni plating to reduce corrosion
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Easy to adjust updraft
airbleed carburetor
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Black anodized aluminum
muffler with pressure tap
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Redline RF glow plug
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Forged aluminum connecting rod
with dual bushings
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Lightened hypereutectic
machined Al-Si ringed piston with XC2 (extreme composite coating) cylinder
liner with etched criss cross pattern
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Three year limited warranty
through Hobby Services beginning at date of purchase
Specifications
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Displacement: .91 cu in
(14.97cc)
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Bore: 1.114" (28.3mm)
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Stroke: 0.937" (23.8mm)
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Practical RPM: 1,800 - 12,000
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Output: 1.6 HP @ 11,000 rpm
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Weight: 26.20oz (742.8g)
without muffler
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Crankshaft Size: 5/16-24
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Height from Mounting Tab
Bottom to Top of Rocker Arm: 3.77" (95.7mm)
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Height from Crankcase Bottom
to Top of Rocker Arm: 4.63" (117.7mm)
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Width at Mounting Tabs: 2.36"
(60mm)
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Width of Crankcase below
Mounting Tabs: 1.69" (43mm)
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Center of Mounting Holes Same
Side: 0.98" (25mm)
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Center of Mounting Holes
Opposite Side: 2.05" (52mm)
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Center of Crankcase to Drive
Washer: 2.62" (66.5mm)
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Distance from Backplate Screw
to Drive Washer: 3.64" (92.5mm)
Package Contents
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Thunder Tiger F-91S Four Stroke Engine with header pipe, muffler,
glow plug, valve gauge, valve adjusting wrench, 1.5mm, 2mm, 2.5mm
and 3mm hex wrenches, instruction sheet, Redline RF glowplug,
decals and box wrench with 14mm & 12mm hex sizes
Requirements
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Fuel: 18% lubricant and 10-15%
nitro content, synthetic/castor blend lubricant recommended
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Propeller: Break-in: 11x10
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Stunt/Aerobatic: 11x10, 11x11,
12x10, 12x11, 13x9
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Scale: 14x7, 15x6, 16x6, 12x8
(3-blade)
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Glow starter, plug wrench and
field equipment
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