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 deceleration on arrival is desired and cannot be achieved by other means than by engines of the ship, then the required energy at least doubles.

# If the turn is in response to a man overboard, stop the engines.

If the rack is elevated above the running rails, there is no need to interrupt the running rails to allow passage of the driving pinions of the engines.

If you have something that you don ’ t want anyone to know, maybe you shouldn ’ t be doing it in the first place, but if you really need that kind of privacy, the reality is that search engines including Google do retain this information for some time, and it ’ s important, for example, that we are all subject in the United States to the Patriot Act.

If he could fit the Meteor engines to the Me 262 airframe he would have had the best fighter in the world.

If all went well the rocket would reroute the fuel for this engine to the other engines and have the rocket burn longer to compensate for the loss of acceleration.

Eliska later recalled: " If he is going to be the love of my life, then I better learn to love these damned engines.

If equipped with internal combustion or turbine engines, engine rooms employ some means of providing air for the operation of the engines and associated ventilation.

If personnel are not normally in the engine space, as in many pleasure boats, the ventilation need only be sufficient to supply the engines with intake air.

If a comparison to piston engines and the " accepted " norm must be made and " accepted " norm being a 4 stroke piston engine.

If an airplane with wing-mounted pusher engines experiences icing the props will ingest shedded chunks of ice, endangering the propeller blades and parts of the airframe that can be struck by ice violently redirected by the props.

If fueled by carbon-containing fuels such as natural gas, the exhaust will contain CO < sub > 2 </ sub > but reduced by up to 50 % compared to diesel engines running on marine bunker fuel.

If multiple versions of other engines are stripped out of their list, Chessmaster 9000 ranks 14th among all engines tested.

If large pieces of ice separate when the aircraft is in motion, they can be ingested in engines or hit propellers and cause catastrophic failure.

If vacuum is required ( vehicles that can be fitted with both petrol and diesel engines often have systems requiring it ), a butterfly valve connected to the throttle can be fitted to the manifold.

If the system is engineered more for show than functionality, it may be tuned to enhance the lower sounds that are lacking from high-RPM low-displacement engines.

If radio operation is not possible, electrical control might be used, by way of cables running the length of the train ( especially in case of passenger trains ), or else the helpers are manually controlled, which is still the usual for bank engines at the end of freight trains in Europe.

If future plans to extend the Isle of Wight Steam Railway from Smallbrook Junction to Ryde St. John's are successful, this may see members of that railways fleet, including their two A1X engines, running over Network Rail metals between the two locations.

If any of the worldlines bends away from a geodesic path in some region, we can think of the observers as test particles that accelerate by using ideal rocket engines with a thrust equal to the magnitude of their acceleration vector.

If the ECU detects knock, a condition which is potentially destructive to engines, and " judges " it to be the result of the ignition timing being too early in the compression stroke, it will delay ( retard ) the timing of the spark to prevent this.

If either of the steam engines failed, the water supply to the city was cut off.

If he had married her, he'd have been asking for trouble.

If the bluff failed and they ran into trouble, Brannon had told the others, they would withdraw -- and he would come after his son another time.

If he wondered whether the attackers would allow him to pull away unmolested, he had his answer a moment later.

If the Union conceded this to them, the same right must be conceded to each remaining state whenever it saw fit to secede: This would destroy the federal balance between it and the states, and in the end sacrifice to the sovereignty of the states all the liberty the citizens had gained by their Union.

If any had escaped expulsion by hiding, they certainly would not frequent the market-place.

If a child had a single drop of Negro blood, he would revert to the ancestral line which, except as slaves under a superior race, had not made one step of progress in 3,000 years.

If he had been `` liquidated '' in some way, he would have become a martyr, a rallying point for people who shared his ideas.

If in any one calculation Ptolemy had had to invoke 83 epicycles all at once, while Copernicus never required more than one third this number, then ( in the sense obvious to Margenau ) Ptolemaic astronomy would be simpler than Copernican.

If you had screamed right there in the street where we stood, I could not have felt more fear.

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

If Hammarskjold had not wanted the list disposed of in this manner, and if Bang-Jensen had not wanted it -- who had ordered it??

If Gorton wanted peace and quiet for his complicated meditations this is where he should have had it.

If his circumspection in regard to Philip's sensibilities went so far that he even refused to grant a dispensation for the marriage of Amadee's daughter, Agnes, to the son of the dauphin of Vienne -- a truly peacemaking move according to thirteenth-century ideas, for Savoy and Dauphine were as usual fighting on opposite sides -- for fear that he might seem to be favoring the anti-French coalition, he would certainly never take the far more drastic step of ordering the return of Gascony to Edward, even though, as he admitted to the English ambassadors, he had been advised that the original cession was invalid.

If this capacity had not failed them, they would see that their enemy has made a disastrous miscalculation.

If he had had a son, he would tell him, `` Gather ye rosebuds while ye may This same flower that smiles today tomorrow will be dying ''.

If he had any worries, it was only the small ones, about Mother in New York, and his daughter Edwina and what she might be doing at this hour, with her Aunt Asia, in Philadelphia.

If we had, then one of us would have had to go instead.

If he had income other than wages subject to withholding, he may be required to file Form 1040.

If our SAC bombers were, today, capable of surviving a surprise missile attack and because of infinite dispersion or long endurance had the capability to strike at Russia again, and again, and again, those bombers would unquestionably assure our military dominance.