Abstract: A brake-actuating steering and braking control system for a tracked vehicle is provided with a braking control subsystem, a steering control subsystem, and right and left side brake-actuating subsystems. The braking control subsystem includes a brake pedal and is connected to brake mechanisms of each brake-actuating subsystem. A user may depress the brake pedal to apply a braking force to right and left side track assemblies of the tracked vehicle via the brake mechanisms to thereby slow or stop the tracked vehicle. The steering control subsystem includes a steering wheel and is connected to each of the brake mechanisms. The user may rotationally displace the steering wheel, which applies a braking force to the track assembly corresponding to the direction of rotational displacement of the steering wheel via the corresponding brake mechanism to thereby turn the tracked vehicle.

Abstract: A brake-actuating steering and braking control system for a tracked vehicle is provided with a braking control subsystem, a steering control subsystem, and right and left side brake-actuating subsystems. The braking control subsystem includes a brake pedal and is connected to brake mechanisms of each brake-actuating subsystem. A user may depress the brake pedal to apply a braking force to right and left side track assemblies of the tracked vehicle via the brake mechanisms to thereby slow or stop the tracked vehicle. The steering control subsystem includes a steering wheel and is connected to each of the brake mechanisms. The user may rotationally displace the steering wheel, which applies a braking force to the track assembly corresponding to the direction of rotational displacement of the steering wheel via the corresponding brake mechanism to thereby turn the tracked vehicle.

Abstract: A composition for plugging wells that is biodegradable and environmentally safe comprising bentonite particles coated with a water soluble coating of biodegradable natural resin, such as certified three pound Confectioners White Lac Glaze in Specially Denatured Ethyl Alcohol (SDA) Formula 35A, 190 proof. The bentonite may be in the form of chips or compressed pellets. When exposed to water, the soluble coating dissolves at a uniform rate, exposing the bentonite to water whereupon it expands to form a tough but flexible water impermeable seal of a semi-solid, gel-like mass.