Describes motor for traction over snow, involving principle of compacting snow under treads of machine by means of revolving, torpedo-like rollers, which are moved in direction of their axes, propulsive effort being secured by helical knives or skates mounted on drum surfaces; chassis and engine similar to automobile.
Armstead motor ploughs through deep snow
Paper Trade Jl
Paper Trade Journal ; 77 , n 21
1923
3 pages
4 Figs.
Aufsatz (Zeitschrift)
Englisch
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