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A combination for performing a variety of functions includes (a) apparatus for moving a projectile or other mass along an arcuate path and moving the path substantially radially along a local radius of curvature and (b) a tool, vehicle or other article for receiving such projectile and being moved t

A combination for performing a variety of functions includes (a) apparatus for moving a projectile or other mass along an arcuate path and moving the path substantially radially along a local radius of curvature and (b) a tool, vehicle or other article for receiving such projectile and being moved thereby.

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We claim: 1. A combination for boring earth or other solid objects comprising (a) apparatus for moving a mass from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said path where the mass is located substantially radially along a local radius of curvatu

We claim: 1. A combination for boring earth or other solid objects comprising (a) apparatus for moving a mass from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said path where the mass is located substantially radially along a local radius of curvature and (ii) an outlet for ejecting said mass therefrom; and (b) a boring tool having (i) a leading end for contacting said earth or other solid objects and (ii) a trailing end extending from said leading end, said trailing end having an opening for receiving mass discharged from said apparatus. 2. A combination according to claim 1 wherein said boring tool opening defines a cavity extending from said trailing end to a terminus adjacent said leading end. 3. A combination according to claim 2 wherein said terminus defines a spike having a pointed end facing toward said trailing end. 4. A combination according to claim 3 wherein said spike is provided with threads. 5. A combination according to claim 2 wherein said terminus defines a spike having a pointed end facing said trailing end and further including one or more discharge openings in the vicinity of said spike. 6. A combination according to claim 5 wherein said spike is provided with threads. 7. A combination according to claim 1 wherein said boring tool comprises (a) a bore bit extending from said leading end toward said trailing end, (b) a tubular member extending from said trailing end toward said bore bit, and (c) engagement means for fastening said tubular member to said bore bit. 8. A combination according to claim 7 wherein said engagement means includes a bearing permitting rotational movement between said bore bit and said tubular member. 9. A combination according to claim 8 wherein said bore bit includes a cavity extending from a terminus adjacent said leading end toward said trailing end and a spike extending from said terminus toward said trailing end, said spike having threads thereon. 10. A combination according to claim 9 further including one or more discharge openings in the vicinity of said spike. 11. In combination, (a) a projectile; and, (b) apparatus for moving said projectile from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said arcuate path where said projectile is located substantially radially along a local radius of curvature, (ii) an outlet for ejecting said projectile therefrom, said projectile having a closed leading end and a trailing end, and (iii) a support ring encircling said projectile in an area between said leading end and said trailing end. 12. In combination, (a) a projectile; and (b) apparatus for moving said projectile from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said arcuate path where said projectile is located substantially radially along a local radius of curvature, (ii) an outlet for ejecting said projectile therefrom, said projectile having a closed leading end and a trailing end, said trailing end having a cavity extending from said trailing end to a terminus spaced from said trailing end. 13. A combination according to claim 12 wherein said terminus defines a spike having a pointed end facing toward said trailing end. 14. A combination according to claim 12 further including an explosive charge positioned in said cavity. 15. A combination according to claim 14 further including one or more vent passageways in said projectile between said terminus and said trailing end. 16. A combination according to claim 14 wherein said projectile is provided with external cutting members adjacent said leading end. 17. A combination according to claim 12 further including a second projectile having a leading end sized to be received in said cavity. 18. A combination according to claim 17 wherein said second projectile has outwardly facing cutting flutes. 19. In combination, (a) a projectile; and (b) apparatus for moving said projectile from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said arcuate path wherein said projectile is located substantially radially along a local radius of curvature, (ii) an outlet for ejecting said projectile therefrom, said projectile having a closed leading end, a trail end, and external cutting members adjacent said leading end. 20. In combination (a) a projectile; (b) apparatus for moving said projectile from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said arcuate path where said projectile is located substantially radially along a local radius of curvature, and (ii) an outlet for ejecting said projectile therefrom; and (c) a boring tool having a leading end with an exit opening and a passageway extending from said leading end and terminating in an inlet opening at said trailing end, said inlet opening being larger than said exit opening, said projectile having a size permitting entry into said inlet opening, said size being larger than said exit opening. 21. A combination according to claim 20 wherein said boring tool has an abrasive exterior surface. 22. A combination comprising (a) a plurality of projectiles; (b) apparatus for successively moving said projectiles from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said arcuate path where each said projectile is located substantially radially along a local radius of curvature, and (ii) and outlet for ejecting said projectiles therefrom; and (c) an article having an opening to receive said projectiles, said article having a surface upon which said projectiles may act to propel said article, said article comprising a tool having (i) a leading end for contacting earth or other solid objects and (ii) a trailing end extending from said leading end, said trailing end having an opening for receiving said projectiles. 23. A combination according to claim 22 wherein said boring tool opening defines a cavity extending from said trailing end to a terminus adjacent said leading end. 24. A combination according to claim 23 wherein said terminus defines a spike having a pointed end facing toward said trailing end. 25. A combination according to claim 24 wherein said spike is provided with threads. 26. A combination according to claim 23 wherein said terminus defines a spike having a pointed end facing said trailing end and further including one or more discharge openings in the vicinity of said spike. 27. A combination according to claim 26 wherein said spike is provided with threads. 28. A combination according to claim 22 wherein said boring tool comprises (a) a bore bit extending from said leading end toward said trailing end, (b) a tubular member extending from said trailing end toward said bore bit, and (c) engagement means for fastening said tubular member to said bore bit. 29. A combination according to claim 28 wherein said engagement means includes a bearing permitting rotational movement between said bore bit and said tubular member. 30. A combination according to claim 29 wherein said bore bit includes a cavity extending from a terminus adjacent said leading end toward said trailing end and a spike extending from said terminus toward said trailing end, said spike having threads thereon. 31. A combination according to claim 30 further including one or more discharge openings in the vicinity of said spike. 32. A method for boring a hole in earth or other solid objects comprising the steps of (a) providing a mass accelerator for discharging solid articles; (b) providing a boring tool having (i) a leading end for contacting said earth or other solid objects and (ii) a trailing end extending from said leading end, said trailing end having an opening for receiving solid articles discharged from said mass accelerator; and (c) discharging said solid articles from said mass accelerator and into said trailing end while said leading end is in contact with said earth or other solid object. 33. The method according to claim 32 wherein said mass accelerator has an arcuate path along which said solid articles are propelled and further including the step of moving the portion of said path in which a solid article is located substantially radially along a local radius of curvature. 34. A method for moving a boring tool comprising the steps of (a) providing a mass accelerator for discharging projectiles, said mass accelerator having an arcuate path along which said projectiles are propelled, moving the portion of said path in which a projectile is located substantially radially along a local radius of curvature; (b) providing a boring tool having (i) a leading end for contacting said earth or other solid objects and (ii) a trailing end extending from said leading end, said trailing end having an opening for receiving projectiles discharged from said mass accelerator; (c) rapidly discharging one or more of said projectiles from said mass accelerator; and (d) causing said one or more projectiles to impact said boring tool. 35. In combination (a) apparatus for moving a mass from one speed to a higher speed along an arcuate path including (i) means for moving a portion of said path where the mass is located substantially radially along a local radius of curvature and (ii) an outlet for ejecting said mass therefrom; and (b) a guide tube for directing said ejected mass, said guide tube being rigid and rotatable to provide a conical spread of projectiles.