Abstract: A landing gear for a model airplane featuring a support structure that is spring loaded to permit controlled resilient tilting of the support structure thereby absorbing the shear impulses to which a plane is is otherwise subject to. A pair of springs is mounted on the outside of the plane and supports the union section of a yoke with attached wheels against the plane body. Fasteners attaching landing gear to plane body provide sufficient range in two degrees of freedom to permit rearward/forward and sideways tilt of the landing gear.

Abstract: A tool for stripping the sheath from a cable including a plunger slidably positioned in a housing. A cable opening in the side is provided enabling a user to position the cable between a roller inside the housing and the end surface of the plunger. The end surface of the plunger has a cutter blade that penetrates the sheath of the cable positioned between the roller and the surface of the plunger so that, when the cable is pulled through the cable opening, an axially directed slit is formed in the sheath of the cable enabling the user to peel off the sheath.

Abstract: A landing gear for a model airplane featuring a support structure that is spring loaded to permit controlled resilient tilting of the support structure thereby absorbing the shear impulses to which a plane is is otherwise subject to. A pair of springs is mounted on the outside of the plane and supports the union section of a yoke with attached wheels against the plane body. fasteners attaching landing gear to plane body provide sufficient range in two degrees of freedom to permit rearward/forward and sideways tilt of the landing gear.

Abstract: A method for controlled removal of carbonate blockage from interior walls of water conduit systems having substantial reduction in flow capacity. A section of the system to be cleaned is isolated and an aqueous liquid is circulated to establish baseline liquid flow rates. An acidic cleaning composition which removes the blockage but which generates carbon dioxide gas is then added under controlled conditions to a circulating aqueous cleaning solution. The fluid flow rates and pH are monitored throughout treatment. Adjustments are made if necessary to maintain a controlled amount of carbon dioxide gas liberated. The aqueous acid cleaning solution is circulated in an open loop system with continued addition of acid until the outflow rate decreases and once again equals the inflow rate. Substantial inorganic carbonate deposits are thus removed from water conduit systems while dangerous conditions due to excessive generation of carbon dioxide gas are avoided.

Abstract: A process for pipe system cleaning and in-line treatment of spent pipe system cleaning solution prior to disposal. A cleaning solution is added to a fouled pipe system to clean the pipe system of scale or deposits. The spent cleaning solution is recirculated through the cleaned pipe system and a treatment agent is added to the recirculating spent cleaning solution. The treatment agent is recirculated until the spent cleaning solution is environmentally safe for disposal. The in-line treatment process minimizes the volume of treated spent cleaning solution and minimizes the time required to treat the spent cleaning solution.