ground speed

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ground speed

also ground·speed (ground′spēd′)
n.
The speed of an aircraft relative to the ground.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ground speed

The horizontal component of the speed of an aircraft relative to the Earth's surface. Also called GS.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
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The Cat 279D3 and 289D3 loaders have ground speeds of 13.6kph, a 20% increase over their D Series counterparts.
Auto is the choice for field work such as cultivations, when the operator can dial-in maximum and minimum ground speeds and leave the powertrain to get on with it.
Ground speeds at 3,300rpm rated engine speed ranged from 0.79 to 9.50 mph and ground clearance was 20 inches.
In addition, productivity is increased by using ground speeds of up to 13 kph (8 mph), as compared to shank unit speeds of 8 kph (5 mph).
Conducted at the Robonic Arctic Test UAV Flight Centre at Kemijarvi in Finland late last month using a Robonic MC2555LLR pneumatic launcher, the campaign culminated with "extreme" launches at high ground speeds, says Selex.
Additionally, a two-speed drive is available, which offers ground speeds up to 12.5 mph.
* Available two-speed drive offers ground speeds to 12.5 miles per hour
This ability, along with ground speeds up to 15 mph, reduces moving time by approximately 1/3 to 1/2--as compared to the traditional lawn tractor--increasing profitability for lawn maintenance services and leisure time for private consumers.
The platform's hydraulic float system kept the cutting bar at a consistent height and that, along with the smoother feeding of the crop material, let us run at faster ground speeds. I think the platform helped us capitalize on all the productivity-improving features built into the combine."
The planetary gearing extends the speed capability of the hydromodule to cover the full range of ground speeds needed for a modern tractor, from a creeper to highway driving.