under the hood

under the hood

[hot-rodder talk] 1. The underlying implementation of a product (hardware, software, or idea). Implies that the implementation is not intuitively obvious from the appearance, but the speaker is about to enable the listener to grok it. "Let's now look under the hood to see how ...."

2. Can also imply that the implementation is much simpler than the appearance would indicate: "Under the hood, we are just fork/execing the shell."

3. Inside a chassis, as in "Under the hood, this baby has a 40MHz 68030!"

under the hood

A method of instrument flight training in which the trainee is under the hood to restrict visibility outside the cockpit and is prevented from seeing outside while simulating instrument flight. An appropriately rated pilot is required to act as a safety pilot in the other control seat while this training or practice is being conducted.
References in periodicals archive ?
But critics have slammed the use of the hoods as dehumanising and potentially dangerous to suspects placed under the hood.
Tuck the flaps under the hood and tape them inside the engine compartment to prevent them from moving while you spray.
For this study, the appliance was usually positioned with the cooking surface pushed back as far as possible under the hood and at a 6.0 in.
The phrase "hood capture and containment" is defined as "the ability of the hood to capture and contain grease-laden cooking vapors, convective heat, and other products of cooking processes." Hood capture refers to the products getting into the hood reservoir from the area under the hood, while containment refers to these products staying in the hood reservoir and not spilling out into the space adjacent to the hood.
And as an example where the steel crankshaft really performs is under the hood of the Z06 Corvette, which uses the 7-liter, 505-hp LS7 hand-built V8 engine, 4140 steel is used.
The automaker, which will introduce the model later this year, needed greater space under the hood to accommodate a more powerful engine.
However, the simplest explanation is that the hood itself is moving the water and the particle with it during its lift because (1) changes in the volume of the space under the hood must create a flow of water and (2) movements of particles corresponded exactly with lifts of the hood.
In that, it describes a field test where all the appliances under the hood are at operating temperatures, all sources of outdoor air providing makeup air for the hood are operating, and all sources for the recirculated air providing conditioning for the space are operating.
For this study, the appliance was usually positioned with the cooking surface centered front-to-rear under the hood and at a 6.0 in.
Also new under the hood are composite valve covers on General Motors' all new line of modular inline four, five, and six-cylinder engines.
The location of supply air diffusers or grilles within the general vicinity of the hood front face often creates turbulence at the hood front lip, which results in the cooking effluent spilling out from under the hood. The solution is to redirect the supply air away from the hood face with diffuser baffles or by moving the diffusers farther away.
Observations made inside the cooling tunnels on green sand molding lines indicate that the amount of organic coating in the hoods and the ducts tied to those hoods is directly related to the amount of visible smoke emitted from the molds under the hoods. The emission of smoke from a green sand mold is directly related to the amount of gas vented from that mold and the amount of smoke that is consumed by the flame present at the discharge point for the vented gases.