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- Flight Design F2
- Aeronca 7AC
- Sonex / Sonex-B
- Piper PA-15
Comparison
4 models side by side: scroll sideways to see them all. The attribute names stay on the left.
| Flight Design F2 | Aeronca 7AC | Sonex / Sonex-BThese figures describe a typical build. Each aircraft of this design was built by its owner, and the one you are looking at may differ. | Piper PA-15 | |
|---|---|---|---|---|
| What it is | ||||
| Seats | 2 | 2 | 2 | 2 |
| Landing gear | tricycle | taildragger | tailwheel | taildragger |
| Engines | — | 1 | — | 1 |
| Engine | Rotax 912iS (100 hp) | Continental A-65-8 | AeroConversions AeroVee 2180 (AeroVee Turbo 100, Jabiru 2200 120, UL Power, Rotax 9-series optional) | Lycoming O-145-B2 |
| Horsepower | 100 hp | 65 hp | 80 hp | 65 hp |
| Fuel | — | 100LL | — | 100LL |
| Certification basis | LSA | CAR3 | amateur-built | CAR3 |
| Production start | 2020 | 1945 | 1998 | 1948 |
| Production end | — | 1948 | — | 1948 |
| Endorsements required | — | tailwheel | — | tailwheel |
| Performance | ||||
| Cruise (75 % power) | — | 70 KTAS | — | 85 KTAS |
| Range (75 %, standard fuel, 30-min reserve) | — | 270 nm | — | 250 nm |
| Service ceiling | — | 12,400 ft | 16,000 ft | 10,000 ft |
| Climb rate | — | 500 ft/min | 900 ft/min | 490 ft/min |
| Stall speed (Vso) | — | 38 KCAS | 35 KCAS | 38 KCAS |
| Takeoff over 50 ft | — | — | — | — |
| Landing over 50 ft | — | — | — | — |
| Load and fuel | ||||
| Seats | 2 | 2 | 2 | 2 |
| Useful load | 482 lb | 480 lb | 480 lb | 480 lb |
| Full-fuel payload | — | 402 lb | — | 408 lb |
| Max takeoff weight | 1,320 lb | 1,220 lb | 1,100 lb | 1,100 lb |
| Empty weight | 838 lb | 740 lb | 620 lb | 620 lb |
| Usable fuel | — | 13 gal | 20 gal | 12 gal |
| Fuel burn at cruise | — | 3.6 gal/h | — | 3.6 gal/h |
| Cost of ownership | ||||
| Price, low | $215,000 | $18,000 | $35,700 | $26,000 |
| Price, high | $249,000 | $60,000 | $51,700 | $45,000 |
| Prices as of | 2026 | 2026 | 2026 | 2026 |
| Engine TBO | — | 1,800 h | — | — |
| Overhaul cost, low | — | $20,000 | — | — |
| Overhaul cost, high | — | $30,000 | — | — |
| The fleet and its record | ||||
| Registered, all time | 24 | 5,165 | 567 | 362 |
| Active fleet | 24 | 1,875 | 459 | 165 |
| Median year built | 2024 | 1946 | 2011 | 1948 |
| NTSB events, last 10 years | 0 | 42 | 22 | 3 |
| Fatal events, last 10 years | 0 | 11 | 7 | 0 |
| Events per 1,000 active, last 10 years1 | 0 · thin base (low) | 22.4 | 47.93 | 18.18 |
| Personal-flying events per 1,000 active2 | 0 · thin base (low) | 18.67 | 43.57 | 12.12 |
| Ownership transfers, last 24 months | 26 | 366 | 98 | 25 |
| Transfers per 100 active3 | 108.33 · thin base (low) | 19.52 | 21.35 | 15.15 |
| Airworthiness directives | 0 | 1 | 0 | 1 |
| Directives, last 5 years | 0 | 0 | 0 | 0 |
| Rate confidence | low | ok | ok | ok |
| Peer scores | ||||
| Peer class | Fixed wing single-engine, piston, 1 engine, 1-2 seats | Fixed wing single-engine, piston, 1 engine, 1-2 seats | Fixed wing single-engine, piston, 1 engine, 1-2 seats | Fixed wing single-engine, piston, 1 engine, 1-2 seats |
| Accident record4 | — | 7.3 of 10 | 4 of 10 | — |
| Severity5 | — | 3.1 of 10 | 1.5 of 10 | — |
| Access6 | — | 6.4 of 10 | 8.9 of 10 | 8.4 of 10 |
| Support7 | 2.1 of 10 | 9.9 of 10 | 9.2 of 10 | 7.5 of 10 |
| Liquidity8 | 10 of 10 | 4.8 of 10 | 5.8 of 10 | 2.8 of 10 |
| Overall (sum of the categories shown)9 | — | 31.5 out of 50not comparable: partial score | 29.4 out of 50not comparable: partial score | Partial: 18.7 out of 30 (safety not scored, too few records)not comparable: partial score |
- Events per 1,000 active, last 10 years: Flight Design F2, per 1,000 active aircraft · base 24 active; Aeronca 7AC, per 1,000 active aircraft · base 1,875 active; Sonex / Sonex-B, per 1,000 active aircraft · base 459 active; Piper PA-15, per 1,000 active aircraft · base 165 active.
- Personal-flying events per 1,000 active: Flight Design F2, per 1,000 active aircraft · base 24 active; Aeronca 7AC, per 1,000 active aircraft · base 1,875 active; Sonex / Sonex-B, per 1,000 active aircraft · base 459 active; Piper PA-15, per 1,000 active aircraft · base 165 active.
- Transfers per 100 active: Flight Design F2, per 100 active aircraft · base 24 active; Aeronca 7AC, per 100 active aircraft · base 1,875 active; Sonex / Sonex-B, per 100 active aircraft · base 459 active; Piper PA-15, per 100 active aircraft · base 165 active.
- Accident record: Flight Design F2, class median 36.69 · 321 models in class; Aeronca 7AC, class median 36.69 · 321 models in class; Sonex / Sonex-B, class median 36.69 · 321 models in class; Piper PA-15, class median 36.69 · 321 models in class.
- Severity: Flight Design F2, class median 13.04; Aeronca 7AC, class median 13.04; Sonex / Sonex-B, class median 13.04; Piper PA-15, class median 13.04.
- Access: Flight Design F2, class median 1,000; Aeronca 7AC, class median 1,000; Sonex / Sonex-B, class median 1,000; Piper PA-15, class median 1,000.
- Support: Flight Design F2, class median 77.5; Aeronca 7AC, class median 77.5; Sonex / Sonex-B, class median 77.5; Piper PA-15, class median 77.5.
- Liquidity: Flight Design F2, class median 20; Aeronca 7AC, class median 20; Sonex / Sonex-B, class median 20; Piper PA-15, class median 20.
- Each of the five categories places the model within its peer class, from 0 (the worst of the class) to 10 (the best): a position among comparable models, not a grade. The overall score is the sum of the categories shown that are scored, out of 10 for each (50 when all five are); it is given only when at least 4 of the five are scored, and it can be set against another model's only when both are in the same peer class and scored on the same categories. When accident record and severity cannot be scored because the model has too few records, the other three give a partial score out of 30, labelled as such; it is never set against a full score.