overhead valve

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overhead valve

A valve located in the upper part of the aircraft reciprocating engine cylinder head. Both the inlet and outlet valves are overhead valves. See induction stroke.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
OHVs are comprised of all-terrain vehicles (ATVs), recreational off-highway vehicles (ROVs), and utility task vehicles (UTVs).
* almost all OHV's must be registered and insured (there are exceptions for OHV's owned by farmers and used only on private land and for military vehicles);
OHV owners who use their OHVs on public lands are required to register with the Montana Department of Justice, Title and Registration Bureau.
OHV riders are furious, saying the federal government is taking away their long-established rights.
Reached by consensus over six months of meetings last year, recommendations from the OHV Enforcement and Education Working Group would enhance public safety and improve conditions for owners of OHVs who ride legally on public and privately owned trails across the state.
MSRP $679 Engine Honda OHV Displacement 190cc Transmission Forward/reverse Tilling Width 18 in Tine Diameter 12 in dual directional Tilling Depth Adjustable depth bar [ILLUSTRATION OMITTED]
May 2004, pg.18) The term "OHV" refers to the position of the valves being "over" the cylinders and became popular immediately prior to and after WWII when such pushrod engines with overhead valves gradually replaced the older style side-valve engines, sometimes referred to as "flat head engines" since there were no valves in the head.
Robin and Honda OHV gasoline engines power the units.
It's advanced industrial OHV four-stroke engine, makes it exceptionally durable, and it features CycloConverter [TM] technology offering stable power output equal in quality to automatic voltage regulator (AVR) generators but dramatically lighter at only 68.4 lbs.
With the exception of designated wildlife areas, wilderness areas and specific area closures, National Forest and Bureau of Land Management lands are typically open to OHV travel.
There are few methods published for the determination of VE, its metabolite 3-desacetyl-vecuronium (OHV) (1-4), and RO (5,6) that use HPLC with ultraviolet, fluorescence, or electrochemical detection or gas chromatography with nitrogen-sensitive detection.
But educational information on land use ethics hasn't been getting to ATVers, says Collin, because they have had little involvement with OHV groups that advocate responsible off-highway driving: "We certainly promote the concept that, in most areas, OHVs should stay on existing routes and shouldn't be heading off-cross-country"