The Rocket Equation Has a Hard Limit. LASSTOV Doesn't Use It.
Escaping the rocket equation.
The Problem
The Tsiolkovsky Constraint
Every conventional launch vehicle is governed by the Tsiolkovsky rocket equation. Because a rocket must carry all of its propellant from the ground, 85–95% of its mass at lift-off is propellant. For every kilogram delivered to orbit, 20–50 kilograms of propellant must be burned.
This is not an engineering failure. It is a consequence of fundamental physics that incremental improvements in engines, materials, or manufacturing cannot overcome.
Current Market Pricing and the Cost Floor
LASSTOV Advantage
27–135× lower cost
2–25× lower cost
100–750× lower cost
80–600× lower cost
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Launch System
SpaceX Falcon 9
SpaceX Starship (target)
ULA Vulcan Centaur
Arianespace Ariane 6
LASSTOV (projected)
Cost per kg to LEO
$2,700
$200–500 (projected)
$10,000–15,000
$8,000–12,000
$20–100
Reusability
Partial (first stage)
Full (unproven at scale)
Expendable
Expendable
Fully reusable
Payload fairing dimensions cap satellite and module size
Vertical launch requires specialised, expensive infrastructure
Range safety, weather windows, and refurbishment cycles constrain cadence
Sonic boom and environmental concerns restrict overland trajectories
Structural Limitations Beyond Cost
All of these constraints trace back to the same root cause: the reliance on chemical rocketry and its operational paradigm.
The LASSTOV Solution
Invert the Paradigm
Rather than carrying propellant from launch and consuming it during ascent, LASSTOV extracts thermal energy from the atmosphere and condenses ambient air into liquid propellant in flight. The vehicle gains mass during atmospheric flight rather than losing it.
The Virtuous Cycle
As the vehicle accelerates, mass flow through its intake systems increases, providing more thermal energy, more propellant, more thrust, and more speed. The energy extraction improves with velocity. This virtuous cycle is the fundamental reason LASSTOV can reach orbital velocities without pre-loading propellant at the ground.
Liquid Air as an Industrial-Grade Propellant
Liquid air is produced industrially worldwide. It is non-toxic, non-cryogenic at operating pressures, and free of feedstock cost when manufactured from ambient atmosphere in flight. When expanded through nozzle systems, it provides substantial thrust comparable to conventional rocket propellants without the handling hazards of LOX/LH2 systems.