Piper PA-12 Super Cruiser

Note: There is technically only one model PA-12, but each surviving example is individually characterized by its STC modifications. The community informally grades PA-12s by installed engine horsepower: stock 108 HP examples, 125 HP, 135 HP, 150 HP, and 180 HP configurations represent effectively different airplanes in terms of performance. The 150 HP engine STC is considered the "big one" that transforms the airplane's utility, particularly for backcountry work.

The PA-12's immediate predecessor was the PA-12 Cruiser (often confused with the Super Cruiser), which was a three-seat version powered by a Continental A-65. Production was limited, and the model was quickly superseded by the Lycoming-powered Super Cruiser.

The stock PA-12 with its 108 HP Lycoming O-235 cruises at approximately 91 KTAS (105 mph), a significant step up from the PA-11's 75 KTAS. Rate of climb is 600 fpm at sea level -- adequate for a 1,750-lb airplane but not exhilarating. The later 115 HP takeoff-rated variant does not meaningfully increase cruise speed but provides better takeoff performance and approximately 700 fpm initial climb.

The PA-12's standout number is range. With 38 gallons of fuel burning 6-7 GPH at economy cruise, the airplane can cover over 500 nm with a comfortable reserve. This is touring-airplane range in a backcountry-capable airframe -- a combination that few aircraft of any era can match at this price point.

"60 mph is the magic speed for almost everything" is a common PA-12 adage. Climb at 60 mph, descend at 60 mph, fly the pattern at 60 mph. The airplane is straightforward and predictable. Stall speed of approximately 42 KIAS clean (36 KIAS with slips or modified flaps) keeps approach speeds comfortably low for short-field work.

Short-field performance is good but not exceptional in stock configuration. The 720-foot takeoff ground roll and 470-foot landing roll are longer than the J-3 or PA-11 due to the higher gross weight, but the PA-12 still accesses grass strips that would exclude most modern four-seat aircraft. With a 150 HP engine STC and flap STC installed, takeoff rolls decrease substantially, and the airplane becomes a legitimate backcountry performer.

The service ceiling of 12,600 feet is adequate for operations in the western United States, though climb rate above 8,000 feet density altitude with a stock 108 HP engine and full gross weight is marginal. The 150 HP conversion addresses this limitation decisively.

The PA-12's 800-lb useful load and 38-gallon fuel capacity create a meaningfully different payload-range picture than the two-seat Cubs. This is the first Cub-family airplane where you can carry people AND go somewhere.

Scenario 1: Solo Cross-Country (Maximum Range)

Solo with full fuel, the PA-12 has over 300 lbs remaining for cargo. This is a genuine resupply/cargo-hauling configuration -- 500+ nm range with meaningful payload capacity.

Scenario 2: Pilot + One Passenger (Touring)

Two people, full fuel, and 60 lbs of baggage leave 132 lbs of margin. This is the PA-12's touring sweet spot -- 500 nm range with two occupants and weekend bags. This configuration is what makes the PA-12 a genuine touring aircraft rather than just a fun flyer.

Scenario 3: Three Occupants (Full Seats)

Three occupants require reduced fuel to stay under gross weight with average-sized adults. Even with 28 gallons, range exceeds 380 nm -- still excellent for day trips. However, three large adults (200+ lbs each) push the airplane to its limits. The rear seats are close together and not designed for large passengers; this is most practical with a pilot plus two smaller adults or an adult and child.

Scenario 4: Backcountry Mission (Modified 150 HP PA-12)

With a 150 HP engine and the increased gross weight STC (typically 1,838 lbs), this configuration has comfortable margin. The pilot and passenger arrive at a backcountry strip 150 nm away with ample fuel reserve and 100 lbs of camping gear. This is the mission that makes the PA-12 such a popular backcountry platform.

PA-12 vs. PA-18 Super Cub: The Comparison That Matters

The PA-18 Super Cub is the PA-12's direct successor and the gold standard for backcountry taildraggers. How does the PA-12 compare?

• Seats: PA-12 has three seats; PA-18 has two. Advantage PA-12 for carrying passengers, though the PA-18's rear seat is more practical for a single passenger.
• Engine: Stock PA-18s range from 90 to 160 HP; most desirable examples have 150-160 HP. A 150 HP PA-12 matches the most common PA-18 configuration.
• Useful load: Similar when the PA-12 has the gross weight increase STC.
• Short-field performance: PA-18 with flaps has a slight edge due to purpose-designed flap system and lighter empty weight.
• Price: A well-maintained 150 HP PA-18 typically costs $120,000-$200,000+. A comparably modified PA-12 costs $80,000-$130,000. The PA-12 offers 70-85% of the PA-18's capability at 50-65% of the cost.
• Community and parts: Both are well-supported. The PA-18 has a larger, more active community (SuperCub.org). The PA-12 is well-served by the Short Wing Piper Club.

For buyers priced out of the PA-18 market, the PA-12 is the most logical alternative and one of the best values in backcountry aviation.

Flight Training (4/10): Not a primary trainer due to the three-seat configuration and wider fuselage. The tandem seating is offset (pilot left, observer right-rear and left-rear), making instructor-student communication different from a side-by-side trainer. Useful for tailwheel transition training, particularly for pilots who will fly larger tailwheel aircraft. The wider cabin and higher wing loading provide a different handling experience than the lighter Cubs.

Backcountry (8/10): This is where the PA-12 excels, particularly in modified form. Stock, it is a competent backcountry airplane limited primarily by the 108 HP engine's performance at high density altitudes. With a 150 HP engine STC, flaps, tundra tires, and a STOL kit, the PA-12 becomes a serious backcountry machine that approaches the PA-18 Super Cub's capability at 40-60% of the cost. The three-seat configuration allows a pilot plus passenger plus meaningful gear, which the two-seat Cubs cannot match. Docked points because the stock airplane needs modification to reach its full potential.

Business Travel (2/10): The PA-12 can technically transport a pilot and two passengers 500+ nm, which is more than the Cubs can claim. However, 91 KTAS cruise, tandem seating, no IFR capability, and minimal baggage space make it impractical for business use. The extra point over the Cubs reflects the airplane's ability to actually get somewhere with people.

Aerobatics (1/10): Not approved for aerobatic flight. The airframe is not stressed for aerobatic loads.

Cross-Country (5/10): The PA-12's best conventional mission. With 500+ nm range, three seats, and a reasonable 91 KTAS cruise speed, the PA-12 is a legitimate touring airplane for pilots who value the journey over the arrival time. Weekend trips of 200-400 nm are entirely practical. Adding a radio, GPS, and ADS-B makes the airplane reasonably capable in the modern airspace system. Docked points for slow cruise speed and lack of IFR capability.

Cargo Hauling (3/10): The 800-lb useful load provides genuine cargo capacity after accounting for fuel and pilot. With 20 gallons of fuel (short-hop configuration), a solo pilot can carry over 400 lbs of cargo -- useful for backcountry resupply runs. The rear seat area accommodates bulky items when passengers are not aboard.

Local Fun (8/10): The PA-12 is a joy to fly recreationally. It retains enough Cub-family character to feel connected to the stick-and-rudder tradition while offering enough performance to actually go somewhere. Grass-strip fly-ins, local sightseeing, and dawn patrol flights are the PA-12's sweet spot. The wider cabin is more comfortable than the J-3/PA-11 for relaxed flying.

Surveying (3/10): Better than the two-seat Cubs due to the observer seat and slightly higher cruise speed. The high wing provides good downward visibility. However, lack of modern systems and the tailwheel configuration limit practical survey utility.

The PA-12's larger panel (compared to the J-3/PA-11) and standard electrical system on most examples make it a more practical platform for avionics upgrades. Many PA-12s were delivered with or later received electrical systems.

Basic VFR ($0-$3,000): Many PA-12s fly with a single COM radio, no transponder, and a portable GPS. This is adequate for uncontrolled-field VFR flying and backcountry operations. A portable ADS-B solution handles compliance needs for occasional Class B/C airspace transit.

Equipped VFR ($5,000-$15,000): A panel-mounted COM radio (Garmin GTR 200), ADS-B Out transponder (GTX 335), and panel-mounted GPS (Garmin aera 760 or GI 275) provide solid situational awareness and airspace compliance. This is the sweet spot for PA-12s used for cross-country touring and backcountry flying.

Well-Equipped ($15,000-$25,000): GTN 650Xi or equivalent navigator, GTX 345 (ADS-B In/Out), audio panel, and one or two GI 275 flight instruments. This level of avionics approaches modern cross-country capability and is seen in premium PA-12 restorations. The panel space accommodates these upgrades, though installation requires careful planning to maintain weight and balance.

The PA-12 boasts more STCs than any other vintage Piper -- hundreds of approved modifications covering virtually every aspect of the airplane. This is the PA-12's greatest strength as a platform: the ability to incrementally build a custom backcountry or touring machine.

Engine Upgrades

The 150 HP Lycoming O-320 conversion is the single most important PA-12 modification. It improves climb rate by 50-70%, reduces takeoff roll by 25-30%, and provides meaningful power margin at high density altitudes. The engine is lighter than the O-360 and maintains acceptable weight and balance. Nearly every serious backcountry PA-12 has this conversion.

Flap STCs

The stock PA-12 has no flaps. Several STCs add flap systems:

Adding flaps transforms the PA-12's approach and landing characteristics. Steeper approaches, lower approach speeds, and shorter landing rolls make a significant difference on backcountry strips with obstacles.

Bush / Backcountry Modifications

The "Full Build" PA-12

A fully modified backcountry PA-12 typically includes: 150 HP O-320 engine, PA-18 flaps, PA-18 gear legs, 29" tundra tires, Cleveland brakes, vortex generators, extended baggage, tail boxing, and an auto fuel STC. This configuration represents $30,000-$60,000 in modifications on top of the airframe and creates an airplane that competes directly with stock PA-18 Super Cubs costing $80,000-$150,000+ more. This value proposition is the PA-12's greatest market advantage.

Parts Availability -- Good

The PA-12 benefits from parts commonality with the broader Cub family and the PA-18 Super Cub:

• Univair Aircraft Corporation: Primary aftermarket supplier. Extensive PA-12-specific parts inventory.
• CubCrafters: STCs and performance parts that apply to PA-12s, particularly through their Super Cub STC ecosystem.
• Wag-Aero: Additional aftermarket source for airframe parts.
• Short Wing Piper Club (SWPC): Type club with technical resources, parts exchange, and community knowledge. The SWPC covers PA-12, PA-14, PA-15, PA-16, PA-17, PA-20, and PA-22.
• Lycoming engine parts: The O-235, O-290, O-320, and O-360 engines used in PA-12s are among the most widely supported engines in general aviation.

The PA-12's production run of 3,760 aircraft provides a reasonable salvage parts base, and the extensive overlap with PA-18 components (particularly for modified examples) ensures that most parts are available.

Mechanic Familiarity -- Common

Any A&P with tube-and-fabric experience can maintain a PA-12. The Lycoming engine family is the most common in GA, and virtually every shop is familiar with O-235 through O-360 maintenance. The complexity comes from STC management: a heavily modified PA-12 requires a mechanic who understands the interaction between multiple STCs and can verify compliance documentation.

Annual Cost Range

Operating costs scale with engine size. A stock 108 HP PA-12 burns 6-7 GPH; a 150 HP conversion burns 7-9 GPH; a 180 HP conversion burns 9-10 GPH. Engine overhaul costs also scale: $22,000 for an O-235, $28,000-$32,000 for an O-320, $32,000-$38,000 for an O-360.

Expensive Maintenance Items

• Fabric re-cover: $30,000-$45,000 complete. The PA-12's larger airframe costs more to re-cover than a J-3/PA-11.
• Engine overhaul: $22,000-$38,000 depending on engine type.
• Landing gear overhaul/upgrade: $3,000-$8,000 for PA-18 gear conversion.
• Prop overhaul: $1,500-$3,000 for fixed-pitch metal prop.

PA-12 values are driven primarily by modification level. A stock 108 HP PA-12 and a fully modified 150 HP PA-12 with flaps and bush gear are effectively different airplanes at very different price points.

Price Tiers (2025-2026)

Key Value Drivers

• Engine HP: The single largest value driver. Each step up in horsepower adds $10,000-$20,000. A 150 HP PA-12 is worth $25,000-$40,000 more than a stock 108 HP example.
• Flaps: The second most important modification. Adds $5,000-$10,000 to resale value.
• Fabric condition: Fresh quality fabric adds $10,000-$20,000.
• STC documentation completeness: Incomplete 337s can discount value by $5,000-$15,000. Buyers are increasingly savvy about paperwork.
• Landing gear configuration: PA-18 gear with tundra tires adds $5,000-$10,000 versus stock gear.
• Engine time: Fresh overhaul on a 150 HP O-320 adds $12,000-$18,000 versus run-out.
• Total modifications investment: Well-built PA-12s with $50,000+ in documented modifications can command prices that approach stock PA-18 Super Cub territory, though they rarely exceed it.

The PA-12 market has been appreciating at 4-7% annually, driven by the backcountry community's recognition that a modified PA-12 offers exceptional value relative to the increasingly expensive PA-18. A well-built PA-12 is one of the best values in backcountry aviation.

Airworthiness Directives

The PA-12 has accumulated a moderate AD list over its 75+ year service life. Key ADs include:

• Wing strut inspection ADs: Similar to other Cub-family aircraft. Periodic inspection of strut forks and attach fittings.
• Landing gear strap/tube AD: Early PA-12s had a thin steel strap running from the axle to the gear tube. The welds at each end are prone to cracking. Piper issued a field modification welding a streamlined tube over the strap and reinforcing both ends. Verify compliance during pre-buy.
• Aileron bellcrank inspection: Cracks in cast aluminum aileron bellcranks, typically caused by improper torquing. Recurring inspection required.
• Aileron hinge bracket inspection: Cracks where the hinge attaches the aileron to the wing trailing edge. Visual inspection during annual.
• Continental/Lycoming engine ADs: Standard engine ADs applicable to the installed powerplant.

Common Problems and Pre-Buy Concerns

Fuselage Structural Integrity: The PA-12's wider fuselage, compared to the J-3/PA-11, puts different stresses on the tube structure. Key areas to inspect:

• The left side longeron below the front wing attach fitting -- this is the structural weak link on the PA-12 and must have a vertical tube welded from the top longeron to the bottom if the airplane will be used on floats or with large tires.
• Tail section: the tail needs to be "boxed" (X-braced) for ski or large-tire operations. Without this reinforcement, side loads can damage the aft fuselage.

Landing Gear Weld Cracks: The early-production gear strap welds are a known failure point. Even on modified gear, inspect welds carefully during every annual.

Fabric Condition: Same considerations as all Cub-family aircraft. Budget $30,000-$45,000 for a complete re-cover on the larger PA-12 airframe.

STC Documentation: Because PA-12s accumulate more STCs than almost any other vintage aircraft, documentation is critical. Every modification must have a properly filed FAA Form 337 and corresponding logbook entry. Missing 337s for major modifications (engine, flaps, gear) create airworthiness and resale problems. During pre-buy, request the complete 337 package and verify against the installed configuration.

Aileron System: Bellcrank cracks and hinge bracket cracks are the PA-12's most characteristic structural concern. These components should be inspected carefully at every annual, with particular attention to torque values on bellcrank hardware.

Engine Mount Condition: With various engine STCs, the engine mount may have been modified or replaced multiple times. Verify that the installed mount matches the STC paperwork and inspect for cracks, particularly at the firewall attach points.

PA-12 insurance rates are moderately higher than J-3/PA-11 rates due to the higher hull values, greater gross weight, and more complex STC configurations.

Typical Premiums (2025-2026)

Underwriting notes:

• Hull values for modified PA-12s have increased significantly. Ensure agreed value reflects replacement cost including all STCs and modifications.
• Backcountry/off-airport operations may carry additional premium or exclusions.
• Float operations require specific endorsement and typically add 10-20% to premium.
• Engine horsepower affects underwriting: a 180 HP PA-12 may be rated differently than a stock 108 HP example.
• Tailwheel experience minimums are standard: 25+ hours tailwheel time typical, 50+ preferred.

See insurance-underwriting for broader context on GA insurance markets.