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Soaring Society of Boulder N421EF Checklists

Page ASK 21 Daily Preflight Inspection 2 - 5 ASK 21 Wt & Bal and Pilot Ballast 6 - 8 ASK 21 Postflight Checklist 9 ASK 21 V Speeds and Polar 10-11 Radio Presets 12 Takeoff and Landing checklist 12 Updated 7/4//14

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ASK 21 Daily Preflight Inspection

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Check Squawks, Untie, remove wing stands then covers, gust locks, TE probe protectors

1. Cockpit Area • Canopy Open, Only the Sliding window side

canopy latch should be used on ground ops, Check latches operable and clean, Do not leave canopies open when the ship is pointing into the sun or away from the sun Melting and Fire hazard can occur.

• AROW Airworthiness, Registration, Operators Manual, Weight and Balance checked ok for flight?

• Battery un plug chargers, check secure • Ballast Check Wt. and Bal, Add Ballast or

Remove as necessary, Wt and Bal Envelpoe on page 7. Ballast loading chart on page 5. Tail Ballast use with instructors only.

• Main spar pins in and safety hook on • Check and remove foreign bodies or loose items • Seat belt check, buckle and straps secure Aft if

solo • O2 bottle secure, on, check PRICE. • Flight controls free correct, Rudders set/check,

wheel brake check open spoiler and feel elastic resistance at the end brakes.

• Master on, Instruments / Radios check and set • Check for Sic sacs if needed

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• Tow Release check both • Canopy close aft and lock then close front, lock

only the port side (sliding window side) Yaw Strings?

• Release clear • Pitot clear • Nose wheel psi 28 • CG release if applicable clear • Main wheel and brake rotor check, tire condition,

brake caliper and fluid leaks • Fuselage underside damage free

2. Left Wing • Wing root tape secure • Wing leading edge, clean • Upper and Lower surfaces free of damage, no

fore/aft play • Spoiler condition, clear no water/foreign bodies • Tip skid and wheel condition • Aileron condition, full free travel, pushrod

connected, tape, Mylars • Trailing edge, top and bottom surface free of

damage 3. Inspection Port

• Ailerons and Spoilers connected and secure with spring clips

• Check and remove foreign bodies • Hatch secure and taped

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4. Left side Tail Boom • Check for damage • Static clear and TE probe all the way in and

aligned properly 5. Tail Area

• Tail Plane Properly assembled and secure, Elevator connection proper

• Rudder Properly assembled and secure, cables connected.

• Tail wheel check 36 psi. 6. Right side Tail boom

• Same as 4. Left tail boom 7. Right Wing

• Wing root tape • Trailing edge • Aileron, hinges Tape • Tip skid and wheel condition • Spoilers clear no water foreign bodies in the box • Wing leading edge, clean • Other side of fuselage free of damage

8. Cockpit Area/Nose • Complete Exterior inspection

Positive Control Check ALL Flight Controls

(PCC)

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Weights Aircraft empty weight 850 Lbs. Max Toff weight 1320 Lbs. Payload 470 Lbs. Min Pilot Weight 154 Lbs. Max Pilot Weight 242 Lbs. Wing Loading at Max Wt. 6.84 Lbs./sift Tie Pressures

Nose 28 psi Main 38 psi Tail 36 psi

Front Seat Ballast for solo: # Lead Disks 1 ballast weight is = to 2.76 lbs. at pilot station

No weights in. Min Pilot wt. 154 Lbs. 1. 151 Lbs 2. 149 Lbs 3. 147 Lbs 4. 143 Lbs 5. 141 Lbs 6. 138 Lbs 7. 135 Lbs 8. 132 Lbs 9. 129 Lbs 10. 127 Lbs 11. 124 Lbs 12. 121 Lbs

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Tail Ballast Weight Chart Use only with a CFI

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ASK 21 Post flight stow

1. Leave all equipment switches on, Master OFF. 2. Charger install, check charge light on 3. Remove loose Items / Garbage 4. Alcohol Swab Cannula 5. Wash bugs off ship 6. Remove TE place in front seat, put plug in 7. O2 off, fill if < 500 PSI 8. Trim Full Forward 9. Aileron Gust locks on 10. Nose hook set 11. Canopies closed Aft then Front, Locked, windows

closed 12. Covers On, wing stands under wings, tips and tail

tied, Rudder gust lock on. 13. Equipment box closed and latched. 14. Log Flights in Shack

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ASK 21 V Speeds V-Speed (knots) Solo/Dual Vso (stall clean) 37/42 kts Vs1 (w/airbrakes) 37/42 kts Vm (min sink) 40/45 kts Vle (airbrakes extended) 151 kts Vt (max aero tow) 97 kts Vw (max winch) 81 kts Va (maneuvering) 97 kts G load at Va +6.5g - 4.0g Vb ( Rough air) 108 kts Vne (never exceed) - 5000 151 kts -10000 ft 144 kts -15000 ft 132 kts -FL200 121 kts G load at Vne +5.3g - 3.0g

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Speed to Fly (solo) Sink (Kts) 0 1 2 3 4 5 Airspeed 48 54 59 65 73 78 Glider Sink 1.4 1.7 2 2.4 3.1 3.7 Total Sink 1.4 2.7 4 5.4 7.1 8.7 Glide Ratio 33/1 20 15 12 10 9 Speed to Fly (dual) Sink (Kts) 0 1 2 3 4 5 Airspeed 50 59 68 73 78 84 Glider Sink 1.5 1.9 2.2 2.7 3.2 3.8 Total Sink 1.5 2.9 4.2 5.7 7.2 8.8 Glide Ratio 33/1 21 16 13 11 9

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Radio Preset Frequencies 1 AWOS KBDU 118.825 2 Boulder KBDU 122.725 3 Air to Air 123.3 4 APSA Den Center 128.65 5 AWOS KLMO 120.0 6 Longmont KLMO 122.925 7 AWOS EEIK 133.825 8 Erie KEIK 123.0 9 Rocky Mt KBJC Atis 126.25 10 Tower KBJC 118.6 11 Emergency 121.5

TAKE OFF LANDING . DOLLY WIND . WIND WATER . CONTROLS UNDER CARRIGE . TRIM SPEED . BALLAST TRIM . STRAPS AIRBRAKES . INSTRUMENTS LOOK . Radio/Transponder LAND . SPOILERS TRAFFIC . Canopy Aft/Front AIRSPEED . EMERGENCIES TARGET . TRAFFIC .