whittney guthrie. history & purpose john thorpe designed the cherokee to compete with the cessna...

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Piper Arrow Whittney Guthrie

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Page 1: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

Piper ArrowWhittney Guthrie

Page 2: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

History & PurposeJohn Thorpe designed the Cherokee to compete

with the Cessna 172 (1962)

Arrow came later (1967) to compete with Mooney

Shares an airframe with the Cherokee for economics & students can easily transition into the retractable gear

Base price in 1967: $16,900.00Base price in 2012: $414,900.00

Page 3: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

Brief Overview4 passenger, all metal, single engine, low wing

Retractable gear: Tricycle

200 hp IO-360

2 blade constant speed propeller

BEW: 1890lbs | Max takeoff: 2750lbs

Page 4: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

FuselageLength: 27’

Width: 3’ 6”

Height: 3’ 11”

Nowhere near the fineness ratio of 3

Single door located on the passenger side

Page 5: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

WingSpan: 35’ 5”

Average chord: 4’ 4”

Aspect ratio: 8.23 (Relatively low)

Area: 170 sq. ft

Semi-tapered: Good stall & slow flight

NACA: 652-415

Wing loading: 16.18lbs per sq. ft

Page 6: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

EmpennageStandard vertical

stabilizer with rudder

Stabilator: Because of absence of downwash from wings

Anti-servo tab: Prevents over controlling

Page 7: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

EngineIO-360: Injected/Opposed/4 cylinder/361 cu. In. (5.9lt.)

200 hp: Doesn’t require a high performance endorsement

Compression ratio: 8.5:1

Air cooled

Direct drive

8qt max/2qt min

Power loading: 13.75hp per lb

Page 8: Whittney Guthrie. History & Purpose John Thorpe designed the Cherokee to compete with the Cessna 172 (1962) Arrow came later (1967) to compete with Mooney

Landing GearTricycle

Retractable

Held up by hydraulic

pressure

But what if it fails? Simple…