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 · re-checked on a rolling daily cycle
Skyleader 600
- For sale now
- 1
- Model years available
- 2025–2025
Tomark Viper SD4
No active listings right now.
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
Swipe to see all specs
| Spec / Model | Skyleader 600 | Tomark Viper SD4 |
|---|---|---|
|
|
|
| Price Range | — | $173,116 – $179,000 |
| Category | Light Sport | Light Sport |
| Model Specifications | ||
| Seats | 2 | — |
| Horsepower | 100 HP | — |
| Cruise Speed | 120 kts (222 km/h) | — |
| Range | 600 nm (1,111 km) | — |
| Service Ceiling | 15,000 ft (4,572 m) | — |
| Useful Load | 520 lbs (236 kg) | — |
| Fuel Burn | 5.0 GPH (19 L/h) | — |
| Engines | 1 x Piston | — |
Frequently Asked Questions
Which is better, Skyleader 600 or Tomark Viper SD4?
It depends on your mission and budget.
The 600 cruises at 120 kts with 600 nm range.
Review the specs table above to find which fits your flying profile.
How do prices compare?
Prices vary by year, hours, avionics, and condition. Always get a pre-buy inspection.
What's the difference between Skyleader 600 and Tomark Viper SD4?
Which is cheaper to operate per hour?
Variable cost includes fuel, reserves and overhaul accruals. Annual fixed costs (hangar, insurance, annual inspection) add to the total.
Which has more seats and useful load?
600: 2 seats / 520 lb useful load.
Useful load = max gross weight minus empty weight; it determines how much fuel plus payload you can carry.
How does maintenance compare — TBO and overhaul cost?
Reaching the time-between-overhaul (TBO) triggers a mandatory engine/airframe rebuild that affects resale value.
Disclaimer: All prices and cost estimates are from third-party sources for informational purposes only. Always obtain professional appraisal and inspection before purchase.
Prices re-checked on a rolling cycle — most within a few days · Data: FAA Registry, NTSB · About our data