Fuel limitations of tractor engines
Accessibility is featured in tractor engine
Avery 2-plow tractor has 6-cylinder engine
Following ford tractors down the line
Wind-tunnel Tests of Eight-blade Single and Dual-rotating Propellers in the Tractor Position
Full-scale-tunnel Investigation of a Multiengine Pusher-propeller Installation
A Preliminary Investigation of Exhaust-gas Ejectors for Ground Cooling
Wind-tunnel Tests of Single- and Dual-rotating Pusher Propellers Having from Three to Eight Blades
Wind-tunnel Tests of Single- and Dual-rotating Tractor Propellers of Large Blade Width
High-speed Tests of Radial-engine Nacelles on a Thick Low-drag Wing