Piper J-3 Cub Checklist

What the Piper J-3 Cub is

The Piper J-3 Cub is the airplane most people picture when they picture a light airplane: a yellow, fabric-covered, high-wing taildragger from the 1930s and 40s, powered by a 65 hp Continental A-65 that you start by hand-swinging the propeller. It has no electrical system on the great majority of airframes — no starter, no master switch, no panel of breakers, and often no installed radio at all (pilots carry a handheld if they need one). Fuel is a single gravity-fed header tank mounted in the fuselage just ahead of the windscreen, and the only fuel gauge is a wire with a cork float that pokes up through the cowl; you read it by looking at how far the wire sticks out. Brakes are weak, heel-operated expander-tube drums, so ground handling leans on rudder and airspeed, not differential braking. There are no flaps: approaches are flown with slips and power. It seats two in tandem, and solo flight is commonly flown from the rear seat for center-of-gravity reasons. Who flies it: tailwheel students learning stick-and-rudder discipline, vintage and antique owners, backcountry and grass-strip pilots, and anyone who wants the slowest, most honest kind of flying there is. Pilots transitioning from a modern trainer have to unlearn almost everything about starting and systems — this template exists to make that transition safer, not to teach hand-propping, which must be learned in person from a qualified Cub instructor.

The Cub is the airplane I send people to when they want to actually feel like they’re flying. I built this card around the classic no-electrics J-3 because that’s the one that trips up pilots coming off a 172 — there’s no master switch, no starter, and the only fuel gauge is a bent wire. I kept the carb-heat and fuel-shutoff items repeated all through the flow on purpose, and I left hand-propping deliberately thin because that’s something you learn standing next to the prop with an instructor, not off a checklist.

Normal procedures

The normal flow is built for an airplane with almost no systems. The preflight is split into five walkaround segments (cabin and documents, empennage, right wing to nose, nose and engine, left wing and fuselage), then before-start, engine start by hand-propping, taxi, run-up and before-takeoff, takeoff, climb, cruise, descent, before-landing, after-landing, and shutdown and securing, with a J-3 / A-65 V-speed table. Three type habits define it: the header-tank wire-and-cork fuel gauge you read at preflight and monitor in cruise, carb-heat discipline any time you reduce power, and a hand-prop start kept deliberately thin because it is a physical skill you learn beside the airplane, not off a card. There are no flaps — approaches are flown with slips and power.

Emergency procedures

The emergency and abnormal section is written conservatively for a simple, low-and-slow airplane, with the reflex memory items in bold. It covers engine failure on the takeoff roll, engine failure after takeoff, engine failure in flight, engine fire, a carburetor-icing abnormal, and an electrical section that only applies to modified airframes. On an unmodified J-3 there is no electrical system to fail, so that section defers to your airframe’s own book rather than sending you hunting for a master switch that isn’t installed. This is a training aid built from accepted practice, not an approved procedure — verify every step against your aircraft’s POH and weight and balance, and learn the tailwheel and hand-prop skills in person.

Verify it against your POH

The research behind this template flagged several things that genuinely vary by airframe and serial. Check these against your aircraft’s approved POH and weight & balance before you rely on the card:

• Whether your J-3 has been retrofitted with an electrical system. This card assumes the classic no-starter, no-master configuration. If your airplane has a starter/alternator STC, use that airframe’s own POH for the start and electrical-failure procedures — the hand-prop and “no electrics” flows here do not apply.
• Exact stall speeds. Published Vs/Vso figures for the J-3 vary between sources (roughly 30 kt vs 33 kt), likely from different weights and mph-to-knot rounding. Confirm the exact numbers against your airframe’s POH before treating them as fixed.
• Solo seating position. Solo flight is commonly flown from the rear seat for CG reasons, but this is not confirmed as universal across all serials and weights, and modified aircraft may differ. Confirm against your specific weight & balance.
• Mixture-leaning practice. The A-65 has a mixture control, but it is typically left full-rich at the altitudes these airplanes usually fly. Whether to lean at all is a POH/altitude question for your installation — the card does not treat leaning as a killer item.
• The two Vne regimes. The type certificate distinguishes a dive/glide limit (122 mph / 106 kt) from a lower level-flight and climb CAS limit (90 mph / 78 kt). Do not conflate them; confirm both against your POH.
• Brake type and condition. Original expander-tube heel brakes are weak and have known parts-availability issues; some airframes carry disc-brake STCs. Know which you have and do not assume strong differential braking is available.