The Hybrid Exo Atmospheric Transporter or HEAT, is a real scale rocket with a 640 mm diameter tube that will function as the final rocket and carrier of the one person spacecraft. The oxydizer for the HATV will be liquid oxygen (LOX). The HEAT booster will finally serve as the transportation vehicle for the man rated spacecraft. The HEAT booster will burn for about 60 seconds, providing 40kN of thrust, resulting in less than 3-g making the trip feasible for humans to endure in an upright position. 

The HEAT booster
Brown=epoxy grain, Red=LOX, Blue=spacecraft

The micro spacecraft (MSC) Tycho Brahe-1 is the payload of the HEAT booster. It is a pressurized volume providing support for one upright standing/half-sitting person, with a full view through a polymer plexiglas-dome to experience the entire ballistic ride. Based on the expected flight data and future test-flights, g-force loads and rocket orientation, we will determine the seating construction and necessary support to ensure a safe human travel.  

The MSC will have additional pressurized space, around and behind the astronaut, available for several other systems necessary for the flight procedure, and to support additional scientific and commercial projects.  

Interior payload systems:
– Seating and support for astronaut,
– Environmental control and life support system (ECLSS),
– Automatic and manual override control of booster seperation and parachute systems,
– Scientific instrumentation,
– Commercial goods.  



We are currently looking into some “basic” guidance control in order to prevent gravity turn and to minimize the touchdown area. Otherwise, the system is very basic and will rely completely on the laws of aerodynamics. By having a large launching tower, currently being developed, the rocket will be guided by passive rails until it have sufficient velocity to reach its apogee using only static fins.


The avionics system of the MSC will be flight controller systems or trajectory calculation devices either guiding the rocket or providing ground personal with a position to assist the pick up of personal and jettisoned booster.  

The astronaut may be able to operate cold gas jets to control MSC-yaw in order to avoid unpleasant coriolis force decreasing unnecessary nystagmus effects.


The MSC will have additional space for scientific instrumentation, provided for by educational or research institutions, who are interested in any data available during the flight.  

Commercial goods can be considered to be flown, for later resale as objects “that have been in space”.  


Before the spacecraft goes into a zero gravity parabola, the booster system will be jettisoned. After a while of atmosperic re-enty, the spacecraft will be slowered by a drogue parachute and then 3 main parachutes. Finally the spacecraft will touchdown in water. 


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