ADDRESSING THE FINER ATTRIBUTES OF THE LANSBERRY TRACTOR
November, 1999


Stability:
  The Lansberry tractor has much better stability with respect to side overturns on sloping ground than conventional wheel and track tractors primarily because of its very low center of gravity (CG).  With the track drive system, engine, main structural frame, and hydraulic pumps & motors near the ground, the CG is estimated to be about 10" from the ground.  The Lansberry tractor is also stable with respect to rearward or forward overturns because of the track footprint and the low hitch points; front and rear extendable.

Tractive performance: Research has proven the traction advantage of tracks compared to tires in a wide range of tractive conditions.  Lansberry capitalizes on this traction advantage while incorporating a unique method of turning which alleviates conventional track turning problems.

Low ground pressure: Low ground pressure on the soil is important for reducing soil compaction which can have detrimental effects on plant growth and water infiltration.  Generally, there is a tradeoff between ground pressure and tractive performance in relatively good tractive conditions; however, tracks can generate much better tractive performance in poor tractive conditions with less ground pressure than tires.

Minimal ground disturbance:  Minimizing damaging ground disturbance is of particular importance in the forestry and landscape industries.  In horticultural and agronomic cropping systems, moderate ground disturbance is generally tolerated.  The Lansberry tractor, with its short, approximately 6' long foot print, sixteen inches wide, 10,000-lb. weight and 80" overall width, does not disturb soil or sod surfaces.

Tight turning capability: The mechanical and hydraulic system design of Lansberry tractor makes a zero turning radius possible.  Depending upon the control system implemented on the tractor, the turning radius could be larger to minimize ground disturbance or could be very small to capitalize on the tremendous maneuverability of the machine.

Simple, modular design: The Lansberry tractor is a very modular unit.  Few components other than steel framing, oil reservoir, cab, and operator controls are "custom".  With most components and all major (with respect to cost, design, and development) components, "off the shelf" from component suppliers, assembly, maintenance, and repair of this tractor will be unlike that of any other large tractive machine -- simple.

Wide range of applications: The Lansberry tractor could be adapted to accept a diverse set of attachments including applications from agriculture, construction, forestry, horticulture, landscaping, and recreation.  The tractor would easily accept attachments in the front and rear.  With the exclusive use of hydraulic power, attachments can be easily powered and easily controlled (even automated).  This tractor would be well suited to hold and/or power: feller-bunchers, grapple skidders, implements for agronomic or horticultural crops, snow removal equipment and trail maintenance equipment, just to name a few.

Simple operator interface: With locomotion being hydrostatic and all attachments powered hydraulically, operator controls will be simple and natural.  With foot operated or pre-set speed control, a steering wheel or joy stick, and electronic switches and dials to control attachments, the operator will control all functions with ease and simplicity.

Agriculture, construction and forestry attachments are all readily adaptable to the Lansberry Tractor.

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