How We Measured Safety

The primary metric is fatal accident percentage — when an accident occurs in this aircraft type, how often does someone die? A low fatal percentage means the aircraft is more survivable when things go wrong. This matters more than raw accident count because a popular type with a large fleet will naturally have more accidents.

We only ranked types with 20 or more accidents to ensure a reasonable sample size. Types with fewer accidents can have wildly misleading percentages — one fatal accident out of three total shows 33% fatal, but that tells you almost nothing.

A key factor in survivability is speed at impact. Slower aircraft hit the ground with less energy. Kinetic energy scales with the square of velocity, so even modest speed differences have outsized effects on crash survivability. This is why STOL aircraft dominate the “safest” list and fast cross-country machines dominate the “most dangerous.”

The Safest: Under 15% Fatal Rate

When these aircraft have accidents, the pilot almost always walks away. Low stall speeds, forgiving handling, and STOL capability mean forced landings are survivable.

Why Slow Planes Are Safer

The top 10 safest experimental aircraft are almost all slow, high-wing STOL designs. The Zenith CH 750 tops the list at just 3.6% fatal — meaning 96.4% of pilots who have an accident in a CH 750 survive. The Just Aircraft SuperSTOL, Pietenpol Air Camper, and Kitfox all follow the same pattern: slow approach speeds, short landing distances, and docile handling.

When your engine quits at 2,000 feet, you need somewhere to land. A Kitfox can put down in a short clearing at low speed. A Lancair IV needs a long runway and arrives fast. Same emergency, vastly different outcomes.

Moderate Risk: 15-30% Fatal Rate

These types include many popular all-metal kit aircraft. Higher cruise speeds increase impact energy, but well-designed airframes and larger fleets provide more data confidence.

Highest Risk: Over 30% Fatal Rate

These aircraft have fatal rates well above the fleet average. High cruise speeds are the common thread — higher impact energy means less survivable crashes. Several types in this group have fatal percentages exceeding 50%.

The Fast Composite Problem

Fast composite aircraft dominate the dangerous list — the Wheeler Express (70% fatal), Lancair Legacy (65.4%), and Lancair IV/IV-P (45.5%) are the three deadliest experimental aircraft by fatal percentage. These are fast, composite, retractable-gear aircraft that cruise at 180-200+ knots. When something goes wrong at those speeds, the outcome is almost always fatal.

VFR-into-IMC remains the deadliest single initiator in our dataset at 84.9% fatal. Fast, IFR-capable aircraft may expose pilots to weather-related temptation that slower VFR-only types avoid, though our data cannot confirm this directly.

Are Kit Planes Safe? The Bottom Line

It depends entirely on which kit plane and how you fly it. A Zenith CH 750 has one of the most survivable accident records in the homebuilt fleet. A Lancair IV has one of the least survivable.

The data shows that the aircraft you choose matters, but the decisions you make matter more. The initiators with the highest fatal rates — stall/spin, VFR into IMC, and low-altitude maneuvering — are all pilot decisions, not aircraft failures.

If you are considering building or buying an experimental aircraft, compare types side-by-side, estimate your personal risk, and explore detailed safety profiles for every type in our database.

Important Caveats

• Fatal percentage measures survivability, not how often accidents happen. A type can have a low fatal rate but a high accident rate (or vice versa).
• Types with fewer than 20 accidents have unreliable statistics. A single accident can swing the percentage dramatically.
• Your personal risk depends on training, currency, maintenance, and decision-making — not just aircraft type.
• This data should not be the sole basis for any aircraft purchase or build decision. Consult experienced builders and instructors.