blow-off valve — A valve designed to relieve the back pressure in a compressor, which helps to reduce the angle of attack of the rotor blades and thus helps prevent compressor surge. Also known as a bleed valve or a pop off valve … Aviation dictionary
blow back — Because of a sticky valve or the intake valve closing late, some of the air fuel mixture is blown back through the carburetor … Dictionary of automotive terms
valve — A device used to either open or close an opening to allow or prevent the flow of a liquid or gas from one place to another. There are many different types. See ABS relay valve accumultor valve air valve carburetor air control valve air gulp valve … Dictionary of automotive terms
Blow — Blow, v. i. [imp. {Blew} (bl[=u]); p. p. {Blown} (bl[=o]n); p. pr. & vb. n. {Blowing}.] [OE. blawen, blowen, AS. bl[=a]wan to blow, as wind; akin to OHG. pl[=a]jan, G. bl[ a]hen, to blow up, swell, L. flare to blow, Gr. ekflai nein to spout out,… … The Collaborative International Dictionary of English
flap-overload valve — A valve in the flap system that prevents the flaps from being lowered at speeds that may cause structural damage. If the pilot tries to lower the flaps at higher than permissible speeds, causing excessive air loads on the flap, the valve acts to… … Aviation dictionary
overload valve — A valve in the flap system that prevents the flaps from being lowered at speeds that may cause structural damage. The valve comes into operation by the excessive air loads on the flap if the pilot tries to lower them at higher than permissible… … Aviation dictionary
Back-fire — For other meanings of the term see backfire. A Back fire or backfire is an explosion in the inlet manifold, carburetor/throttle body or air cleaner of an internal combustion engine.cite book last =Afgan first = authorlink = coauthors =Naim Afgan … Wikipedia
To blow hot and cold — Blow Blow, v. i. [imp. {Blew} (bl[=u]); p. p. {Blown} (bl[=o]n); p. pr. & vb. n. {Blowing}.] [OE. blawen, blowen, AS. bl[=a]wan to blow, as wind; akin to OHG. pl[=a]jan, G. bl[ a]hen, to blow up, swell, L. flare to blow, Gr. ekflai nein to spout… … The Collaborative International Dictionary of English
To blow off — Blow Blow, v. i. [imp. {Blew} (bl[=u]); p. p. {Blown} (bl[=o]n); p. pr. & vb. n. {Blowing}.] [OE. blawen, blowen, AS. bl[=a]wan to blow, as wind; akin to OHG. pl[=a]jan, G. bl[ a]hen, to blow up, swell, L. flare to blow, Gr. ekflai nein to spout… … The Collaborative International Dictionary of English
To blow out — Blow Blow, v. i. [imp. {Blew} (bl[=u]); p. p. {Blown} (bl[=o]n); p. pr. & vb. n. {Blowing}.] [OE. blawen, blowen, AS. bl[=a]wan to blow, as wind; akin to OHG. pl[=a]jan, G. bl[ a]hen, to blow up, swell, L. flare to blow, Gr. ekflai nein to spout… … The Collaborative International Dictionary of English
Blow back valve or flap overload valve: Fluid from the selector valve enters port A, flows around cutaway section of the piston, and leaves through port B to the down side of the actuating cylinder. The flaps move downward into the slip stream of the aircraft, but the force that resists the downward movement of the flaps increases, and this causes the pressure in the down line and the valve to increase also. The increased pressure is transmitted to the bottom face of the piston through drilled passages in the lower end of the piston. If flaps are lowered at a speed that is too great for this operation to be accomplished safely, the pressure transmitted to the bottom face of the piston becomes great enough to overcome the force of the spring before the flaps are all the way down. The piston then moves up, and the port A is closed by a shoulder on the bottom end of the piston. Fluid can no longer flow to or from the actuating cylinder; hence the flaps remain in place unless the speed of aircraft increases or decreases.