Hackers [Navic] and [K.o.D] have fitted an Arduino Pro Mini and an array of components into an off the shelf rocketry kit to create a guided model rocket, taking the whole idea of Arduino-based ...

A rocket mass heater is a combination of a rocket ... This passively retains a lot of heat inside the space to be heated. It’s a bit of a trick to balance the system so it puts as much heat ...