Flyin Float

This is a study overview of the information to receive your float plane licence at Kenmore air harbour.

What are the 3Ms

Mixture, Master, Mags

What are the 3H’s (Post Cast off/Pre Docking)

Headset, Harness, Hatch

CIGAR (Pre Run-Up)

Controls, Instruments, Gas, Attitude, Run-Up

What does CFAR stand for? (Takeoff/Landing)

Carb Heat, Flaps, Area, Rudders

14 CFR 25.751

What CFR States that each main float must have a buoyancy of 80% in excess of max weight.

14 CFR 25.755

Which CFR states that each hull must not have less than 5 watertight compartments.

How much more dense is salt water than fresh water?

3%

VSo

53

Vs

56

Vx

55

Vy

65

Vfe

80

Va

97

Nvo

102

Vne

129

Best Glide

70

What is the Electrical Specs for N39CC

12 Volt, 23 Amp-Hr Battert. 70 amp, 14 volt Alternator

How much fuel can N39CC hold?

48 Gallon total, 46 usable

How much fuel do the Cubs burn per hour at 75% power?

9 Gals

What type of engine is in N39CC and what are the specs?

Avco-Lycoming 0-360-C4P, Produces 180HP at 2700 RPM. Horizontally opposed, 4 cylinder, 360 cubic inches of displacement, Carburated, Wet sump (Min 2 quarts, Max 8)

What type of engine is in N9666P? And what are its specs?

Avco-Lycoming Model 0-320, Producing 150 HP at 2700 RPM. Horizontally opposed, 4 cylinder, 320 cubic inches of displacement, Carburated, Wet sump (Min 2 quarts, Max 8)

What is the specs of the electrical system in N9666P?

12 Volt, 23 Amp-Hr. Battery. 50 amp, 14 Volt alternator

How much fuel can N9666P hold total? How much is usable?

61 Gal, 60 Usable

What methods are used to determine wind direction on the water?

Weather Cocking, Wind Texture, White Caps, Smoke, Wind sock

What sort of indicators can we use to determine wind currents?

Debris on the water, Objects just below the water

Rubber Bow Bumper

This Absorbs the shock of docking head on.

Stray Rail

Located on the inside forward edge of the float. This deflects water from hitting the prop.

Chine

Where the bottom and the side of the float are joined. This transfers load from the bottom to the side of the float, and helps deflect water away from the plane.

Deck Rail

This is the edge where to top and side of the float are joined

Deck

This is the top of the float and provides access to the cabin.

Mooring Cleats

These are located on the deck of the float near the bow and stern. Are used to secure the plane to the doc.

Keel

Located at the bottom of the float and runs along the bottom of the float from bow to step.

Sister Keelson

Designed to displace the water earlier than the normal curve of the float reducing the distance of the T/O slide.

Step

This is designed to reduce the amount of surface area of the float that is in contact with the water while the float is on plane. Minimizes the ammount of drag ont he float and allows a slide rotation point for take off.

Skeg

This is located at the end of the keel, extending beyond the step. Provides structural strength and directional control the step area.

Water Rudders

Gives the pilot control of the aircraft at low speeds on the water

Bulkheads

Interior walls dividing the float into several watertight compartments.

Bilge Pump Openings and covers (normally rubber ball type stoppers)

This openings allow water to be pumped from the compartments within the float.

Standpipes

These are connected to the bilge pump openings and extend to the lowest point of each compartment.

Bow and Stern

The front and back of the float respectively.

Forward and Aft spreader bars

These keep the floats at a fixed distance apart to help provide structural integrity.

Bracing Wires

These are used during float attachment to make sure the assembly is tight and that the floats are parallel.

How much water is too much within a float compartment?.

"anything more the usual”

What does the model number of the float indicate? (i.e. EDO-2000)

The number indicates how much fresh water the float will displace, and the max gross weight of an aircraft it will support.

How does the VG kit in N930CC affect its performance?

The plane is able to fly at slower speeds with more control authority.

What is a seaplane propeller?

It is a climb propeller. Has a slightly longer blade with a lower pitch. Allowing the prop to reach max RPM father, subsequently the engine reaches peak horsepower faster.

How can you identify a seaplane base on a chart?

An anchor marks a seaplane base on a sectional chart. An anchor inside of a circle with tabs indicates that there are services available there.

What colors is a seaplane base beacon?

White and yellow

What resources can we use to find information on seaplane bases and services?

Chart Supplements, and Water Landing Directory

What publications can we use to find out about on lake accesss?

Water landing directory

What are the right of way rules while a plane is on the water?

Pilot is expected to follow USCG Nav Rules. The less maneuverable the vessel the more right of way it has. Pass on the right on overtake. When two are converging they should both alter right. Sea planes on the water have right of way to the ones in the air.

What is porpoising?

When the plane is on the step, but not at its optimum pitch. It is either too far aft or too far forward.

What is skipping?

Skipping occurs when the seaplane crosses a boat wake or lands too flat too fast. The plane skips like a rock. To correct for a skip, adjust back pressure on the elevator to attain the proper attitude.

What is a white cap, and when does it occur?

White caps occur at 12-15 knots depending on the size of the body of water.

What is a wind streak, and when does it occur?

Wind streaks will form around 8 KTS. They are thin, white, foamy bubbly lines and run parallel to the wind.

If you have an engine failure occurs over glassy water, where is the best place to land?

Land near shoreline for a reference to judge above the water. Landing with the sun angled behind you allows you to see a visible shadow.

When taxiing, why is the power setting below 800 RPM?

Prevents propeller damage, allows the engine to operate at a lower temp. Also provides the best visibility.

Are water rudders more or less responsive at a faster taxi speed?

They are more effective at slower speed because the water is less disturbed.

What are the four methods for turning in the wind?

Taxi Turn, Step Turn, Inertial Turn, Plow Turn

Explain the different control inputs and aerodynamics for power off sailing?

It is accomplished by placing the ailerons in the desired direction and applying opposite rudder.

Go-around procedure. (6 C’s)

Cram, Climb, Clean, Cool, Call, Care

Where is a seaplane best positioned on a dock?

Upwind side of the dock with the nose into the wind. Approach at a 45 degree angle to allow for escape if there is any unexpected issues.

Explain the beaching progress.

First, fly over to find a landing spot and look for obstructions. Secondly, Land and taxi for a closer look

Third, approach at a 45 degree angle

Lastly aim to have one wing hanging over the shore to allow the pilot to more easily turn it around.

Describe the procedure for an engine failure after takeoff.

Lower nose to regain sufficient airspeed, if you have enough altitude to return to the airport turn around. If under 1000 feet and there is a suitable landing zone do not attempt to turn the engine back on.

When step taxiing, what is the most dangerous turn?

A turn from downwind to upwind.

What do you do if a float buries itself?

Power idle, and rudder toward the buried float with back pressure

Where in the POH can you find floatplane performance data?

Supplemental section of the manual…For the cub, there is not additional performance data. So we must rely on experience to determine aircraft performance.

Explain the effect of high density altitude on floatplanes performance.

Total aircraft performance is reduced. You have to achieve a higher TAS to get the same amount of lift. Meaning you must go faster to take off, in-turn causing more hydrodynamic drag. Causing a longer takeoff slide.

What type of T/O would you use at a lake elevation of 4000 ft?

Use a technique that will result in the least amount of drag.

Aft GC - shorter T/O slide and higher rate of climb. Will have difficulty transitioning to the step.

Forward CG - Longer T/O Slide, and lower climb rate. It will get onto the step easier.