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Gyroplane Spec Sheet
TW Barnett J4B2 Gyroplane
Reg.# N3476 Serial# 224 $22,000
Trailer/Hanger $8,000
Location: Paynes Creek, Northern California
Near Red Bluff
(707) 431-2151
Email: Joe White 5/2/20
1.2.5
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ROTOR BLADES
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Manufacturer
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Barnett
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Rotor Disc Diameter
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28.33 Feet
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Blade Cord
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7 3/4 Inches
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Materials
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Aluminum
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Disc Loading (Disc Area = 630.352
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GW 1292 lbs. = 2.04 lbs./ft2
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Rotor Blade Loading(Blade Area = 15.52)
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GW 1292 lbs. = 83.35 lbs./ft2
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1.2.6
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PERFORMANCE
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Minimum Speed
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35 - 40mph (maintaining altitude with full power)
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Maximum (Vne) Speed
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130 mph
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| Stall Speed
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N/A
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1.2.7
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SPEED AT TAKEOFF (STANDARD SEA LEVEL
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Take Off Speed Speed
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45 - 60 mph
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Take Off Roll
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150 - 500 ft.
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| Landing Roll
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0 - 10 ft.
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| Rate of Climb
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650fpm
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1.2.8
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FUEL
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Fuel Capacity
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17.5 U.S. Gallons
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Endurance
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3.0 Hours (1/2 hour reserve) at 75% cruise
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| Unusable Fuel
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.2 U.S. Gallons
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1.2.9
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OIL
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Capacity
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Approx.4.2 U.S. quarts - DO NOT OVERFILL
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Type
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API Designation SF or SG or greater
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5W-30
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Below 32° F
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10W-40
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-10°F to 90° F
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20W-40
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Above 100° F
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20W-50
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Above 120° F
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NOTE:
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THESE OIL WEIGHTS ARE RECOMMENDED BY SUBARU AND ARE THE MINIMUMS. SUBARU CONTNUES ITS RECOMMENDATION THAT THE NEXT GRADE OF OIL SHOULD BE USED UNDER SUSTAINED HIGH SPEED OPERATIONS>
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WARNING:
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Non-Detergent or straight mineral oils must never be used.
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