Abstract: A "soft excavator" utilizes supersonic jets of air to loosen and remove soil and the like without damage to utility lines and other "hard" buried objects. A pair of digger nozzles, each mounted at an angle to the axis of the tubular support shaft which in turn is mounted for planetary motion on a drivehead rotating about a tubular member, trace a epitrochoidal path around the inlet to the tubular member which advances with each rotation of the drivehead to uniformly loosen soil across the cutting face and to gather the lossened soil toward the tubular member. Injector nozzles direct supersonic jets of air into the tubular member in the direction of the discharge end to generate a secondary air flow which sucks lossened soil aerated by the digger nozzles into the inlet end of the tubular member. The entrained soil is decelerated by a diffuser and flexible bag at the discharge end of the tubular member and deposited in a pile.