underboost en · NOUN
Pronunciation
- (US) audio
Etymology
From under- + boost.
Meanings
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(uncountable) The process of underboosting.
After much analysis and compromise of the variables such as RPM, altitude, carburetor air temperature, fuel/air ratio, that affect BMEP, a simple solution has been arrived at to prevent underboost.
1970, Aerospace Safety - Volume 26:This procedure requires a vacuum pump and a special compound gauge. (See Table 3-6.) Turbocharger problems lead to poor acceleration in the case of underboost, or poor fuel economy in the case of overboost.
1980, Scope and Impact of New Automotive Technology on the Inspection, Diagnosis and Repair Process.:It can be stated that while the time at high power outputs must be minimized by the correct operating techniques, the time at the underboost condition must be eliminated.
1984, Fundamentals of fixed and rotary wing aerodynamics, page 130:
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(countable) An instance of underboost.
We're walking along the flight line, heading toward the choppers, a clear morning with the sun's rays bouncing off the orange trees, Emmett giving us the straight skinny: “The underboost will tear up the engine as much as an overboost.
2011, Ken Babbs, Who Shot the Water Buffalo?: A Novel, →ISBN:So pilots, keep the pressure on to stop underboosts and watch the red lines to stop overboosts.
1970, Aerospace Safety - Volume 26:An underboost can occur whenever an excessively high rpm setting is used with a very low MAP setting, such as when you pull the throttle nearly to idle while descending at high airspeed with a fixed-pitch prop or a constant-speed prop set at high rpm.
1995, Fly Like a Pro, →ISBN, page 72:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| underboosts | Number=Plur | lexicographic |