If, for some reason such as economy, we are not going to develop aircraft nuclear propulsion with a sense of national urgency, then we should turn our effort to developing jet engines with a thrust-to-weight ratio of 12 or 15 to one.

If a person ‘ synthesizes ’ a ‘ jet plane landing ’ sound, this is achieved mostly by altering the shape of the mouth to filter the white noise into pink noise by removing the higher frequencies.

If the erupted jet is unable to heat the surrounding air sufficiently, convection currents will not be strong enough to carry the plume upwards and it falls, flowing down the flanks of the volcano.

If the jet emits a burst of energy every minute in its own rest frame this may be observed on Earth as being a much faster release, perhaps one burst every ten seconds.

If a jet engine were to run in " reverse " in this context, it would take in ambient heat and exhaust fumes to generate kerosene and oxygen.

If ( i. e. when velocity of jet is close to the velocity of light ) then despite the fact that < math >

He reported a narrow escape when, at the foot of the mountain, a jet of steam came out of the ground over which he and his party had just passed: " If it had struck any one of us we would have been scalded to death ".

If the nozzle pressure ratio is above the critical value ( about 1. 8: 1 ) a convergent nozzle will choke, resulting in some of the expansion to atmospheric pressure taking place downstream of the throat ( i. e. smallest flow area ), in the jet wake.

If an incoming HEAT jet penetrates the outer shell and forms a bridge between the shells, the electrical energy discharges through the jet, disrupting it.

If the associated jet stream is stronger than normal and there is colder than normal air in place in central Canada to provide a greater than normal temperature contrast with Gulf of Mexico moisture drawn northward by the developing panhandle low, surface cyclogenesis can be particularly energetic and cause a great swath of heavy snow to develop and blanket a large portion of the American Great Plains and upper-midwestern states in conjunction with very strong winds, the combination of which exceeds blizzard criteria.

If the molecular cohesion of the liquid is sufficiently high, stream breakup does not occur ( if it does, droplets are electrosprayed ) and a charged liquid jet is formed.

If the jet is oriented along the line of sight to Earth, relativistic beaming will change its apparent brightness.

If M and N are two smooth manifolds, how do we define the jet of a function?

If the mouth is open the jet may project several feet.

If the jet turns into very fine fibers instead of breaking into small droplets, the process is known as electrospinning.

If the jet wave is survived, there is a short respite, then the next round of helicopters begins with an extra row of helicopters on the first run.

If the jet had an opening angle of only a few degrees, the burst energy could have been thousands of times lower.

If a stream or jet of air is directed through a flame, fuel air mixing is enhanced and the jet exiting the flame is intensely hot.

If we could use all the small airfields we have in this country, we could disperse our strategic aircraft by a factor of 10 or more.

" If the aircraft is not being hijacked, the pilot should not squawk 7500 and should inform the controller accordingly.

If the air on one side of the diaphragm is at the static pressure, and the other at the stagnation pressure, then the deflection of the diaphragm is proportional to the dynamic pressure, which can then be used to determine the indicated airspeed of the aircraft.

If the weather is below VMC, pilots are required to use instrument flight rules, and operation of the aircraft will primarily be through referencing the instruments rather than visual reference.

If an aircraft is flying over a congested area ( town, settlement, etc.

If the rocket or aircraft is moving at about a constant speed, then distance divided by time is just speed, so power is thrust times speed:

If the aircraft carrying the Hiroshima and Nagasaki bombs had been within the intense nuclear radiation zone when the bombs exploded over those cities, then they would have suffered effects from the charge separation ( radial ) EMP.

If its leading edge is raked back enough, it will escape the shock wave formed at the nose of the aircraft as transonic speeds are reached, reducing drag considerably, and the center of lift moves less than on conventionally configured aircraft, reducing trim drag.

The next citations are not found until 1955, when the May – June issue of Aviation Mechanics Bulletin included the line " Murphy's Law: If an aircraft part can be installed incorrectly, someone will install it that way ," and Lloyd Mallan's book, Men, Rockets and Space Rats, referred to: " Colonel Stapp's favorite takeoff on sober scientific laws — Murphy's Law, Stapp calls it —' Everything that can possibly go wrong will go wrong '.

If an airliner is defined as a plane intended for carrying multiple passengers in commercial service, the Russian Sikorsky Ilya Muromets was the first official passenger aircraft.

If seen, parachutist and light aircraft avoid dust devils.

If a loss of radio communications were to be encountered during VFR conditions, or if VFR conditions are encountered after loss of communication with the ground and other aircraft, the pilot of the aircraft shall continue the flight under VFR and land as soon as practicable.

If they are selected to serve as a pilot ( aircraft ), they will serve 8 – 11 years minimum from their date of winging, and if they are selected to serve as a naval flight officer they will serve 6 – 8 years.

If the APU or its electrical generator is not available, the aircraft cannot be released for ETOPS flight and is forced to take a longer non-ETOPS route.

If they are not successful, the decision to shoot down the aircraft before it reaches United States airspace is made, trading the lives of the approximately 400 innocent passengers to save the lives of hundreds of thousands of people on the ground.

If the leading edge of the aileron is sharp or bluntly rounded, that adds significant drag to that wing and help the aircraft to yaw ( turn ) in the desired direction, but adds some unpleasant or potentially dangerous aerodynamic vibration ( flutter ).

If attached close to the wing root, it makes the stall gentle and progressive ; if attached near the wing tip, it encourages the aircraft to drop a wing when stalling.

If you change this example to then the analogy would be flying in space to reach any position in 3D space ( ignoring the orientation of the aircraft ).

If that pulse is on the same frequency as the sent signal, it will cause a second blip to appear on the radar display, forming the basis of early IFF systems-those blips that are doubled up have the proper transponder, and are thus friendly aircraft.

If the signal from two stations arrived at the same time, the aircraft must be an equal distance from both transmitters, allowing the navigator to determine a line of position on his chart of all the positions at that distance from both stations.

* If the aircraft is a glider a maximum never exceed speed ( Vne ) of CAS

If the circumstances are faced frankly it is not reasonable to expect this to be true.

If his dancers are sometimes made to look as if they might be creatures from Mars, this is consistent with his intention of placing them in the orbit of another world, a world in which they are freed of their pedestrian identities.

If a work is divided into several large segments, a last-minute drawing of random numbers may determine the order of the segments for any particular performance.

If they avoid the use of the pungent, outlawed four-letter word it is because it is taboo ; ;

If Wilhelm Reich is the Moses who has led them out of the Egypt of sexual slavery, Dylan Thomas is the poet who offers them the Dionysian dialectic of justification for their indulgence in liquor, marijuana, sex, and jazz.

If he is the child of nothingness, if he is the predestined victim of an age of atomic wars, then he will consult only his own organic needs and go beyond good and evil.

If it is an honest feeling, then why should she not yield to it??

If he thus achieves a lyrical, dreamlike, drugged intensity, he pays the price for his indulgence by producing work -- Allen Ginsberg's `` Howl '' is a striking example of this tendency -- that is disoriented, Dionysian but without depth and without Apollonian control.

If love reflects the nature of man, as Ortega Y Gasset believes, if the person in love betrays decisively what he is by his behavior in love, then the writers of the beat generation are creating a new literary genre.

If he is good, he may not be legal ; ;

If the man on the sidewalk is surprised at this question, it has served as an exclamation.

If the existent form is to be retained new factors that reinforce it must be introduced into the situation.

If we remove ourselves for a moment from our time and our infatuation with mental disease, isn't there something absurd about a hero in a novel who is defeated by his infantile neurosis??

If many of the characters in contemporary novels appear to be the bloodless relations of characters in a case history it is because the novelist is often forgetful today that those things that we call character manifest themselves in surface behavior, that the ego is still the executive agency of personality, and that all we know of personality must be discerned through the ego.

If he is a traditionalist, he is an eclectic traditionalist.

If our sincerity is granted, and it is granted, the discrepancy can only be explained by the fact that we have come to believe hearsay and legend about ourselves in preference to an understanding gained by earnest self-examination.

If to be innocent is to be helpless, then I had been -- as are we all -- helpless at the start.