Aircraft model
INTERSTATE S-1A
Everything here is true of every aircraft of the type, not of any one aircraft.
What it is
| Seats | 2 |
|---|---|
| Landing gear | taildragger |
| Engines | 1 |
| Engine | Continental A-65-8 |
| Horsepower | 65 hp |
| Fuel | 100LL |
| Certification basis | CAR3 |
| Production start | 1941 |
| Production end | 1942 |
| Endorsements required | tailwheel |
Performance
| Cruise speed | 75 KTAS |
|---|---|
| Range | 300 nm |
| Service ceiling | 13,000 ft |
| Climb rate | 500 ft/min |
| Stall speed (Vso) | 35 KCAS |
| Takeoff over 50 ft | — |
| Landing over 50 ft | — |
Load and fuel
| Seats | 2 |
|---|---|
| Useful load | 450 lb |
| Full-fuel payload | 354 lb |
| Max takeoff weight | 1,200 lb |
| Empty weight | 750 lb |
| Usable fuel | 16 gal |
| Fuel burn at cruise | 3.6 gal/h |
Cost of ownership
| Price, low | $35,000 |
|---|---|
| Price, high | $65,000 |
| Prices as of | 2026 |
| Engine TBO | 1,800 h |
| Overhaul cost, low | $20,000 |
| Overhaul cost, high | $30,000 |
The fleet and its record
| Registered, all time | 265 |
|---|---|
| Active fleet | 66 |
| Median year built | 1941.0 |
| NTSB events, last 10 years | 4 |
| Fatal events, last 10 years | 0 |
| Events per 1,000 active, last 10 years | 60.61 per 1,000 active · base 66 active · thin base (low) |
| Personal-flying events per 1,000 active | 30.3 per 1,000 active · base 66 active · thin base (low) |
| Ownership transfers, last 24 months | 13 |
| Transfers per 100 active | 19.7 per 100 active · base 66 active · thin base (low) |
| Airworthiness directives | 1 |
| Directives, last 5 years | 0 |
| Rate confidence | low |
Peer scores
A score runs from 0 to 10 within the model's peer class: a position, not a grade, and the six are never added together.
| Peer class | Fixed wing single-engine, piston, 1 engine, 1-2 seats |
|---|---|
| Accident record | — · class median 37.5 · 181 models in class |
| Severity | — · class median 10.44 |
| Access | 0 of 10 · class median 1,045 |
| Support | 4.8 of 10 · class median 72 |
| Liquidity | 4.5 of 10 · class median 20.59 |