1. The Mighty Float Cub

2. Overview 1947 Piper J-3C Cub, rebuilt 2005
Continental C engine, overhauled 2005
1947 Edo 1400 floats
Outstanding Fabric Floatplane award, Oshkosh 2006

3. Powerplant
Continental C-85-12, rated 85 hp, with Sensenich 74 inch fixed pitch aluminum prop
Four cylinders, air-cooled, normally aspirated
Oil capacity 4.5 qt; no oil filter
Normal reading 4 qts, minimum 3 qts
Oil changed every 25 hours, screen cleaned every other oil change
Equipped with mixture control, fuel primer, and carburetor heat
Burns approx 6 gal/hr in training

4. Ignition Two Slick Magnetos Two spark plugs per cylinder
Mags always produce electricity when turning; ignition switch only opens/closes the circuits to the spark plugs
Ignition switch with OFF/L/R/BOTH positions
Faulty switch may make the mags hot at any time – be careful on the tightrope!

5. Fuel System Two 12-gal wing tanks, vented through fuel caps
Sumps at each wing tank and at fuel strainer under engine
Glass sight gauges on each tank, meniscus visible at 6 gal
Gravity feed, four position fuel valve in cockpit: OFF, L, R, BOTH
Supplemental Type Code (STC) for automobile fuel; placards on both wings

6. Electrical System No airframe battery or alternator
ELT with associated battery
Headset amplifier with 9 volt battery
Starting power from your right arm
No airframe lights or radio

7. Flight Controls
Conventional elevator/aileron/rudder, dual tandem controls
No flaps
Trim mechanism raises/lowers leading edge of horizontal stab, just like a B-777!
Water rudder and airframe rudder both connected to rudder pedals

8. Weight & Balance Max gross weight 1300 lbs
Floats and all rigging weigh 185 lbs
Empty weight (no fuel/pilots): 808 lbs
Usable load 492 lbs
Max 20 lbs in baggage bin
J-3 Cub may be soloed from front seat when on floats, not on wheels/skis

9. Instruments Tachometer Airspeed Indicator Whiskey compass Altimeter
Oil temperature/ oil pressure

10. Cabin Air/Heat
Cooling provide by opening doors, windows, or first open position of cabin air/heat knob
Cabin air/heat knob on instrument panel opens butterfly valve in left lower firewall to admit fresh air or warm engine compartment air
3 –position pull knob: Off, fresh air, heat

11. Speeds VNE 122 mph level flight or climb; 90 mph glide or dive
No other published V speeds
70 mph for climb at full power
70 mph for descent at 1500 RPM
70 mph for power-off glide