Comparing to the drill rigs, the pit launched machines are shorter and need less space for installation. The mixing and pumping station as well as the power pack stay out of the pit to reduce the pit length. For the TERRA-JET TJ 3008 ES a pit with only 2.7 m of length is required. For the pit launched boring machines TERRA MINI-JET the pit length can even be reduced to 1.3 m.
With the pit launched machine of TERRA you start drilling at the height of the final pipe. This means you don’t have an entry angle at the beginning and you can start drilling horizontally. With normal HDD drill rigs you first have to drill down to a certain depth until you reach the bore channel of your final pipe. Normally this means you have to drill 5 to 10 m more than necessary. No contractor pays for these first meters. With pit launched machines the operator doesn’t have this problem and saves time and money.