Pitts Special S-1 / S-2

The Pitts Special is the most iconic aerobatic airplane ever built. Designed by Curtis Pitts beginning in 1943-44, this compact biplane has dominated aerobatic competition for decades — the US Aerobatic Teams of 1970 and 1972 won world team championships flying Pitts S-1S aircraft almost exclusively. The design has been refined continuously for over 80 years and remains in production today.

The Pitts comes in two fundamental configurations: the S-1 single-seat series (homebuilt and certified) and the S-2 two-seat series (certified only). The S-1 is available as plans-built or kit-built homebuilt aircraft through Steen Aero Lab; the S-2 two-seat certified models are manufactured by Aviat Aircraft in Afton, Wyoming. The S-2C is the current production model.

The Pitts is certified for unlimited aerobatics at +6G/-5G (S-2C) — among the highest G-limits of any certified production aircraft. It is the standard by which other aerobatic aircraft are judged.

Total certified Pitts production exceeds 700 aircraft (S-1S: 61, S-1T: 64, S-2A: 455, S-2S: 17, S-2B: 196, plus S-2C ongoing). Thousands of homebuilt S-1 variants have been constructed from plans.

Certified Models:

Homebuilt Models (plans/kits via Steen Aero Lab):

The S-2C's 2,900 FPM climb rate with 260HP and only 1,625 lbs gross weight gives it a power-to-weight ratio that makes vertical performance effortless — the aircraft will climb vertically until airspeed bleeds to zero, enabling unlimited vertical aerobatic figures.

The Pitts has no flaps — the stall speed of 54 KIAS is the same clean and dirty. This simplifies operations but means approach speeds are higher than typical trainers (70-80 KIAS final approach). The lack of flaps combined with the biplane's high drag allows steep approach angles when slipped.

The 150 KTAS cruise speed on 14 GPH with only 28 gallons fuel gives a modest 277 nm range — the Pitts is not a cross-country airplane. The fuel system is designed for inverted flight with a fuel injection system that maintains fuel flow in any attitude.

The Pitts is notorious for its difficult ground handling and poor forward visibility during taxi and landing. The short coupled tailwheel design, combined with the biplane's limited forward view over the cowling, makes landings one of the most demanding tasks in GA. Ground loops on landing are the most common accident cause.

S-2C (AEIO-540-D4A5, 260HP, 28 gal fuel):

The Pitts is weight-limited for two larger adults. The 475 lbs useful load with 168 lbs of fuel leaves 307 lbs for occupants — two 150-lb pilots with no baggage. Heavier pilots must reduce fuel. Solo aerobatic flying with full fuel provides adequate range for a local aerobatic session (1.5-2 hours at aerobatic power settings). The Pitts is not designed for payload utility — it exists to do aerobatics.

• Flight Training (3): The S-2A and S-2B are used for aerobatic training, not primary flight training. The demanding ground handling and high performance make it inappropriate for beginners. Excellent for teaching aerobatics to experienced pilots.
• Backcountry (1): Not applicable. Short-coupled biplane with minimal ground clearance.
• Business Travel (1): Two tandem seats, 277 nm range, no baggage space, open cockpit feel.
• Aerobatics (10): THE aerobatic airplane. The Pitts defined competition aerobatics. +6/-5G certified (S-2C), unlimited vertical capability, crisp snap rolls, precise point rolls. The S-2C remains competitive in IAC Intermediate and Advanced categories. The single-seat S-1 variants compete at Unlimited level.
• Cross-Country (2): 277 nm range and 14 GPH fuel burn make cross-country impractical. Can be done — pilots fly Pitts cross-country regularly — but frequent fuel stops required.
• Cargo Hauling (1): No baggage area to speak of.
• Local Fun Flying (8): For pilots who love aerobatics, nothing matches the Pitts for pure aerial joy. Every flight is a performance. The combination of power, agility, and biplane aesthetics is intoxicating. The demanding ground handling adds challenge.
• Surveying (1): Not applicable.

• Typical: Minimal VFR panel. Airspeed, altimeter, G-meter, slip/skid ball, tachometer, engine instruments. Many aerobatic Pitts aircraft have intentionally minimal panels.
• S-2C factory: Basic IFR-capable panel available with attitude indicator, heading indicator, GPS, and comm radio. The S-2C panel has more room than earlier models.
• Upgrades: Garmin G5 or GI-275, handheld or panel-mount GPS, ADS-B transponder. Most Pitts pilots keep panels simple — unnecessary instruments are weight and distraction.
• Smoke system: The defining "modification" for air show and competition Pitts. Oil-based smoke systems with cockpit-controlled injection are standard on serious aerobatic aircraft.

• Smoke system: Standard addition for competition and air show aircraft. $3,000-$6,000 installed.
• Inverted fuel system: Standard on AEIO-engine models. Essential for competition aerobatics.
• Three-blade propeller (S-2C): Factory option. Hartzell 3-blade provides smoother operation and better vertical performance.
• Engine upgrades (S-2A): 200HP to 260HP conversion available through engine change.
• Wing modifications: Competition pilots modify wing rigging for specific aerobatic characteristics. Custom wing spars and struts available from specialty shops.
• Canopy options: Different canopy configurations for visibility optimization.
• The Pitts is fundamentally an airframe designed for one purpose — aerobatics. Modifications focus on aerobatic optimization, not utility.

• Annual inspection: $2,000-$4,000. Aerobatic aircraft require more thorough structural inspections.
• Engine overhaul: $35,000 for AEIO-540 at 1,400-hour TBO (aerobatic use). The AEIO prefix indicates full aerobatic oil system.
• Structural inspection: Competition aircraft should have periodic structural inspections beyond the annual — every 500 aerobatic hours or as recommended.
• Parts availability: Good. Aviat Aircraft supports all certified Pitts models. Steen Aero Lab supports homebuilt versions. The Pitts community is knowledgeable and active.
• Mechanic familiarity: Specialist. Biplane rigging, fabric work, and aerobatic aircraft inspection require specific expertise. Not every A&P shop is comfortable with Pitts maintenance.
• Annual all-in cost: $15,000-$25,000 depending on utilization and aerobatic intensity.
• Operating cost: $110-$160/hour all-in.

• S-1C homebuilt (plans-built): $30,000-$80,000. Varies enormously with build quality and engine.
• S-1S certified (180HP): $60,000-$100,000. Original certified single-seat.
• S-1T certified (200HP): $70,000-$120,000. Higher performance.
• S-2A (200HP, two-seat): $60,000-$120,000. Original two-seat.
• S-2A/S-2B (260HP): $80,000-$180,000. The practical buy — two-seat aerobatic training and competition.
• S-2C: $150,000-$350,000. Current production; premium pricing.
• New S-2C: ~$350,000+ from factory.

Per valuation-methodology: Engine time is critical — AEIO-540 overhaul at $35,000 is the biggest variable cost. Aerobatic hours vs cruise hours matter — an aircraft with 500 hours of competition aerobatics has more structural fatigue than one with 500 hours of cruise. Total airframe hours, structural inspection history, and engine overhaul status are the primary value drivers. Smoke system installation adds $3,000-$5,000 to value.

Key ADs:

• Control stick wall thickness: Repetitive inspection AD for flight control sticks with 0.035" wall thickness. Applies to S-1S, S-1T, S-2, S-2A, S-2S, and S-2B models.
• Upper longeron inspection: Repetitive inspection of upper longerons aft of rear cabane struts on S-2A, S-2B, and S-2S. Structural fatigue from aerobatic loads.
• Wing spar inspections: Periodic inspection of wing spars and fittings for fatigue cracks from aerobatic loading.

Common Problems:

• Landing accidents: The #1 issue. Ground loops, porpoising, and loss of directional control during landing rollout dominate Pitts accident reports. The short-coupled tailwheel design and poor forward visibility demand precise technique.
• Tailwheel: The tailwheel assembly is a wear item. Scott tailwheels require regular maintenance. Tailwheel springs and steering components need frequent attention.
• Canopy: Canopy hinges and latches are weak points requiring periodic maintenance.
• Engine wear from aerobatics: Aerobatic operations accelerate engine wear. Inverted flight, high-G maneuvers, and rapid throttle changes stress the engine beyond normal cruise operations. TBO may be reduced to 1,400 hours or less.
• Structural fatigue: The airframe accumulates fatigue from aerobatic G-loading. Competition aircraft need more frequent structural inspections.
• Tight maintenance access: The compact biplane design makes routine maintenance challenging — mechanics report that even oil changes are difficult due to tight cowling access.

Per insurance-underwriting:

• Hull insurance: $3,500-$6,000/year. Aerobatic aircraft carry higher premiums. Hull values for certified Pitts are moderate.
• Liability: $800-$1,500/year. Aerobatic operations increase liability exposure.
• Pilot minimums: Tailwheel endorsement plus aerobatic training required. Most insurers require 25+ hours in type or aerobatic dual instruction. Some insurers won't cover low-time Pitts pilots at all.
• Aerobatic coverage: Specifically listed as covered activity (most standard policies exclude aerobatics). Aerobatic hull policies cost 25-50% more than standard hull.
• Air show coverage: Separate policy or rider required for air show performances.