Brm Aero Bristell vs Tomark Viper SD4
The Tomark SD-4 Viper and BRM Aero Bristell are modern all-metal low-wing LSAs — both comfortable side-by-side Slovak/Czech two-seaters.
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) | Brm Aero Bristell | Tomark Viper SD4 |
|---|---|---|
| All events | 3 | 1 |
| Serious | 0 | 0 |
| Fatal | 2 | 0 |
| Fatalities | 3 | 0 |
| % Fatal | 67% | 0% |
Full Specs Comparison
Swipe to see all specs
| Spec / Model | Brm Aero Bristell | Tomark Viper SD4 |
|---|---|---|
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| Price Range | — | $128,546 – $179,000 |
| Category | — | Light Sport |
| Model Specifications | ||
Frequently Asked Questions
Which is better, Brm Aero Bristell or Tomark Viper SD4?
It depends on your mission and budget.
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 Brm Aero Bristell 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?
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 updated daily · Data: FAA Registry, NTSB · About our data