Beaver DHC-2 Flashcards by Jason Gray

What type of prop is on the Beaver?

Hamilton Standard two-bladed 8’6” constant speed, counterweight prop

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Does high or low RPM require more oil in the prop hub?

High RPM has more engine-driven oil in the hub; therefore, loss in oil pressure will lower RPM

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What fuel pressure PSI should you maintain when wobbling?

5 PSI

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What are indications of low fuel (‘blowing a tank’)?

Loss of fuel pressure
Low fuel pressure red light on dash
Struggling engine

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What is the maneuvering speed (Va)?

124 mph

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What type of flaps does the Beaver have?

Slotted type, and the ailerons drop with the flaps

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What is the maximum takeoff weight for the DHC-2 Beaver on floats?

5600 lbs

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What is the empty weight of the DHC-2 Beaver on floats?

(Need to look up)

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What engine is in the DHC-2 Beaver?

Pratt & Whitney R-985 radial engine

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What is the rated horsepower of the R-985 engine?

450 HP at 2300 RPM

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What is the Vne (Never Exceed Speed) for the DHC-2 Beaver?

180 mph

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What is the best angle of climb speed (Vx) for the DHC-2 Beaver?

Approximately 80 mph

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What is the best rate of climb speed (Vy) for the DHC-2 Beaver?

Approximately 95 mph

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What is the normal cruise speed of the DHC-2 Beaver?

Around 110–115 mph

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What is the fuel capacity of the DHC-2 Beaver?

79 Imp Gallons / 95 US gallons (115 Imp / 138 US gallons with wing tanks) usable

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What is the maximum continuous power setting?

33.5” and 2200 RPM

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What is the climb power setting?

30” and 20

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What is the cruise power setting?

29” and 19

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What is the standard fuel burn rate at cruise power settings?

Approximately 25–30 GPH

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What is the stalling speed at 50 degrees bank?

85 mph

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What is the slow flight speed with no flaps?

75 mph

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What is the slow flight speed with landing flaps?

65 mph

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What is the best glide speed?

92 mph (80 knots)

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What is the max flap speed?

105 mph indicated

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What is the gross weight of the DHC-2 Beaver?

5600 lbs

How much weight is allowed in each float compartment?

150 lbs

What is the oil capacity of the R-985 engine?

5 1/4 Imperial gallons

What does the electrical system in the DHC-2 Beaver operate at?

50 amps, 24 volts DC with a 24-volt, 17-amp battery

What is the primary alternator/generator output?

50 amps at 24V

Where is the battery located?

Aft of the cabin door on the left side, accessible from a hinged door on the outside

What does the turn coordinator in the DHC-2 Beaver operate on?

A vacuum-driven gyroscopic system

When should carburetor heat be used?

Operating in high humidity and low temperatures to prevent icing

During run-up, what should the magneto check show?

A drop of no more than 150 RPM per magneto

What is the best initial action in case of engine failure after takeoff?

Lower the nose to maintain glide speed and assess landing options immediately

What is the emergency procedure for an in-flight fire?

* Cutting fuel supply * Using the fire extinguisher * Executing an emergency landing

When should a precautionary landing be performed?

When fuel is low, weather is deteriorating, or an abnormal aircraft condition is detected

What should be done if the ammeter shows a continuous discharge?

Cycle the alternator, if nothing changes produce power load

What is the primary hazard of glassy water landings?

Loss of depth perception, requiring a stabilized descent and power-on landing

What is CFIT (Controlled Flight Into Terrain)?

A major concern in Southeast Alaska due to low visibility, mountainous terrain, and rapidly changing weather

What should pilots be aware of when navigating in Southeast Alaska?

Frequent fog, rain, and turbulence from mountain waves

What is the minimum safe altitude over non-congested areas?

500 feet AGL; over congested areas, 1000 feet AGL (FAR 91.119)

What is the recommended altitude when flying in mountainous terrain?

At least 2000 feet above the highest peaks and avoid box canyons

What is the proper leaning procedure for best economy at cruise altitude?

Pulling the mixture back until a slight RPM drop is noted

What is the recommended technique for a glassy water takeoff?

Using step taxi to break suction and a gentle rotation

What is the ideal approach speed for landing on floats in calm conditions?

Around 65 mph

What is the safest technique when taxiing in strong winds on floats?

Aileron into the wind

What is the safest method for floatplane docking in a strong current?

Approach at an angle and use a controlled drift to the dock

What is the best practice to avoid wake turbulence when operating near large boats or seaplanes?

Land parallel to the wake and avoid crossing it at shallow angles

What is the elevation of Juneau International Airport?

25 feet

What is the CTAF frequency for Juneau International Airport?

118.7 MHz

What is the ATIS frequency for Juneau International Airport?

135.2 MHz

What is the class of airspace over Juneau International Airport (PAJN)?

Class D to 2500 MSL

What type of airspace surrounds Juneau International Airport at the surface?

Class G and Class E above 700 MSL; Class G at the surface outside of that

What is the alternate elevation listed for Juneau International Airport?

25 feet

What is the UNICOM frequency for floatplane operations in Juneau Harbor?

122.95 MHz

What is the frequency for Juneau FSS (Flight Service Station)?

122.15 MHz

What is the ground frequency at Juneau International Airport?

121.9 MHz

What is the second frequency for Juneau Tower during the summer season?

120.7 MHz

What is the standard traffic pattern altitude at Juneau International Airport?

1025 feet AGL

What is the minimum visibility requirement for VFR flight in Juneau's Class E airspace?

3 miles (3 Cessna 152) (FAR 91.155)

What are the steps to follow before starting the engine?

* Radios → OFF * Fuel → ON * Area → CLEAR

What are the steps to complete before takeoff?

* Fuel → FULLEST TANK * Mixture → RICH * Prop → HIGH RPM * Trim → SET * Flaps → SET * Water Rudders → UP

What are the steps to follow during cruise?

* Fuel → PROPER TANK * Mixture → RICH

What are the steps to follow before landing?

* Fuel → FULLEST TANK * Mixture → RICH * Water Rudders → UP * Flaps → AS REQUIRED * Prop → HIGH RPM

What are the steps to complete after landing?

* Flaps → UP * Water Rudders → DOWN

What are the steps to follow when stopping the engine?

* Radios → OFF * Mixture → IDLE CUTOFF * Mags → OFF * Master → OFF

What are the emergency steps for an engine failure?

* Pitch → BEST GLIDE (92 MPH) * Attempt Restart: Mixture → RICH * Fuel → FULLEST TANK * Wobble Pump → IF NEEDED * Mags → ON

What are the emergency steps if the engine restart fails?

* Prop → MIN * Fuel Selector → OFF * Fuel/Oil Shutoff → PULL * Doors → UNLATCH