Skyleader 600 vs Tomark Viper SD4
The Skyleader 600 and Tomark SD-4 Viper are all-metal low-wing LSAs of similar mission.
Live Market Snapshot
Current asking-price market, aggregated across multiple marketplaces · refreshed daily
No active listings right now.
- For sale now
- 12
- Model years available
- 2013–2024
Live data from AeroGurus, aggregated daily across the used-aircraft market. Figures are current asking prices, not appraisals — confirm with a pre-buy inspection.
Safety Record
Absolute counts scale with fleet size — the most-produced types log more events without being less safe. Compare the % fatal.
| NTSB (1982–now) | Skyleader 600 | Tomark Viper SD4 |
|---|---|---|
| All events | — | 1 |
| Serious | — | 0 |
| Fatal | — | 0 |
| Fatalities | — | 0 |
| % Fatal | — | 0% |
Full Specs Comparison
| Spec / Model | Skyleader 600 | Tomark Viper SD4 |
|---|---|---|
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| Price Range | — | $137,745 – $179,000 |
| Category | — | Light Sport |
| Model Specifications | ||
| Seats | 2 | 2 |
| Horsepower | 100 HP | 100 HP |
| Cruise Speed | 120 kts (222 km/h) | 110 kts (204 km/h) |
| Range | 600 nm (1,111 km) | 400 nm (741 km) |
| Service Ceiling | 15,000 ft (4,572 m) | 15,000 ft (4,572 m) |
| Max Gross Weight | — | 1,320 lbs (599 kg) |
| Useful Load | 520 lbs (236 kg) | 550 lbs (249 kg) |
| Fuel Burn | 5.0 GPH (19 L/h) | 5.0 GPH (19 L/h) |
| Engines | 1 x Piston | 1 x Piston |
Which Should You Buy: Skyleader 600 or Tomark Viper SD4?
Bottom line: Both are durable metal Slovak/Czech LSAs — choose by cabin, equipment and support on the specific aircraft. Skyleader = value; SD-4 = efficient handling.
Pick the 600 if…
- Faster cruise — 120 kts vs 110 kts.
- Longer range — 600 nm vs 400 nm.
Pick the Viper SD4 if…
Auto-generated from current market data and published specs. Confirm with a pre-buy inspection and professional appraisal.