However, the aircraft which we have today are tied to large, `` soft '' airfields.

However, even without the order of the captain, any member of crew or passenger, can take reasonable measures, when he or she has reasonable grounds to believe that such action is necessary to protect the safety of the aircraft, or of people or property therein.

However, the Luftwaffe also provided volunteers to Spain to test both tactics and aircraft in combat, including the first combat use of the Stuka.

However, the Western Allies ' air-to-ground aircraft were so greatly feared out of proportion to their actual tactical success, that following the lead up to Operation Overlord German vehicle crews showed reluctance to move en masse during daylight.

However, since piston-engined aircraft rely upon magnetos to provide spark to their cylinders rather than a battery powered ignition coil system, this theory is not strongly convincing.

However, carriers have been called upon to be first responders even when conventional land based aircraft were employed.

However, World War II delayed car production with efforts shifted to the construction of vehicle bodies, field guns, aircraft and engines.

However, any aircraft operating under VFR must have the required equipment on board, as described in FAR Part 91. 205 ( which includes instruments necessary for IFR flight ); but the view outside of the aircraft is the primary source for keeping the aircraft straight and level ( orientation ), flying where you intended to fly ( navigation ), and for not hitting anything ( separation ).

However, there are still minimum weather conditions that must be present in order for the aircraft to take off and land ; these will vary according to the kind of operation, the type of navigation aids available, the location and height of terrain and obstructions in the vicinity of the airport, equipment on the aircraft, and the qualifications of the crew.

However, they explained at a meeting of the Reich Industrial Council on 18 September 1941 that the new next generation aircraft had failed to materialise, and obsolescent types had to be continued to keep up with the growing need for replacements.

However, when an aircraft is climbing, descending, or banking in a turn the lift is tilted with respect to the vertical.

However, beginning with its separation from the Army in 1996, the Air Force has been downsizing ; it now has a strength of approximately 270 fixed-and rotary-wing aircraft, and is moving towards a smaller, more professional force.

However, the 1960 shootdown of a CIA U-2 by an SA-2 Guideline surface-to-air missile ( SAM ) while on a clandestine reconnaissance mission over the Soviet Union suddenly complicated the introduction of these new aircraft.

However, compared to a turbojet ( which can fly at high altitude for enhanced speed and fuel efficiency ) a propeller aircraft has a much lower ceiling.

However, pilots and aircraft do not need to be IFR rated to fly in CVFR areas, which is highly advantageous.

However, the real challenge in aviation is producing FAA-certified alternatives to the standard reciprocating engines that power most small general aviation aircraft.

However, at particularly busy airports, or airports with other special requirements, there is an air traffic control ( ATC ) system whereby controllers ( usually ground-based ) direct aircraft movements via radio or other communications links.

However, apart from sea transport, mosquitoes have been effectively carried by personal vehicles, delivery trucks, trains and aircraft.

However, instead of comparing engine performance, the gross aircraft performance as complete systems can be compared using first principle definitions of power, force and work with the requisite considerations of constantly changing effects like drag and the mass ( of the fuel ) in both systems.

However, he is best remembered for his work on a series of racing aircraft, which culminated in the Supermarine S. 6B, and the famous Supermarine Spitfire fighter.

However, aircraft commonly use heading indicators or directional gyros, which are not gyrocompasses and do not position themselves to north via precession, but are periodically aligned manually to magnetic north.

However, with the development of aircraft like the Convair B-36, both sides were gaining a greater ability to deliver nuclear weapons into the interior of the opposing country.

However, in general, the books only feature mental battles when there is some reason for mind-to-mind contact ( for example, Trump contact ) and magic or Trump is involved in all three of the above conflicts, so it is not clear whether Zelazny intended his characters to have such a power ; the combination of Brand's " living trump " powers and his high Psyche ( as presented in the roleplaying game ) would have guaranteed him victory over Corwin.

However, after enough carbamazepine has been presented to the liver tissue, the CYP3A4 activity increases, speeding up drug clearance and shortening the half-life.

However, the method of Rebecca's execution is presented as proposed by Lucas de Beaumanoir, Grand Master of the Knights Templar – a Frenchman and a fanatic, determined to root out " corruption " from the Templars.

However, Louis Feldman has presented arguments that Origen may have seen a copy of the Testimonium ( in a different form than quoted by Esebeius ) and not commented on it for there was no need to complain about its tone.

However, other scientists have written that " the full potential PCR was not realized " until Mullis ' work in 1983, and that Mullis ' colleagues failed to see the potential of the technique when he presented it to them.

However, in 785, wary of the customs his son may have been taking in Aquitaine, Charlemagne sent for him to Aquitaine and Louis presented himself at the Royal Council of Paderborn dressed up in Basque costumes along with other youths in the same garment, which may have made a good impression in Toulouse, since the Basques of Vasconia were a mainstay of the Aquitanian army.

However, Russian expansion presented a large and growing threat.

However, marionette productions presented in empty halls, the back rooms of taverns, or within large tents at England's yearly agricultural events at Bartholomew Fair and Mayfair were expensive and cumbersome to mount and transport.

However, the major issue that presented itself during Sergius ’ pontificate was the question over the fourth marriage of the Byzantine Emperor Leo VI.

However he did gain the support of Parliament through his proposals to increase its powers, and he also presented his policy to Parliament a week before he submitted them to the Council.

However, the circle closed in the late 1970s when The Sandbaggers ( 1978 – 80 ) presented the grit and bureaucracy of espionage.

However, lemmas are sometimes embedded in the proof of a theorem, either with nested proofs, or with their proofs presented after the proof of the theorem.

However, in the case of a finitely presented group we know that not all the generators can be trivial ( Any individual generator could be, of course ).

" However, when the therapist presented this evaluation he neglected to include " if you had not been caught " in his statement.

However, unlike a reception line, it does not give the guests an opportunity to speak to any of the people being presented.

However, behaviorally significant stimulus presentation ( such as classical conditioning where a reward is presented ) continues to activate the dopaminergic neurons.

However, these " two Italian archaelogists " presented their discoveries in a film rather than a scientific journal.

However, special citations for poetry were presented in 1918 and 1919.

However, it is wrong to associate Arnold too closely with the image of him presented in that book.

However, to project a non-aligned image, he did renew ties in 1967 ; the first Soviet ambassador arrived and presented his credentials in 1968 ( Mobutu did, however, join the U. S. in condemning the Soviet invasion of Czechoslovakia that year ).

However, he reverted to his old ways when he was presented with a bottle of non-alcoholic champagne.

However, the original content of nine episodes presented in this set were altered.

However Coward was presented with an Academy Honorary Award for " his outstanding production achievement.

However, opera is musical theatre, while oratorio is strictly a concert piece — though oratorios are sometimes staged as operas, and operas are sometimes presented in concert form.

However, these artifacts, bought by John Ruskin and presented to the British Museum, excited less attention than they deserved.