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What is the purpose of winglets on aircraft? - Aircrafts

Posted by Bryan Dunford on

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  • tezobala marisetti
    tezobala marisetti Mar 23, 2020

    It reduces the DRAG at tip of the wing. Because of reduced size of vortices helps in less fuel consumption.

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2 Answers

Will composite planes have the same longevity as all-metal planes?


As an aircraft engineer I have deep concerns over composite and plastics used in aircraft construction. I personally don't think they can possibly last simply because repairing structural damage cannot be 100% guaranteed. Metal and wooden structures are easily repaired or replaced. Splicing and repairing plastic and composites are not so easy and expensive to do. It's often cheaper to buy a new one, which means that the aircraft will be written off rather than anyone having to guarantee any complicated repair. Metal aircraft, however, can easily be repaired given a skilled sheet metal worker and the repairs are often stronger than the original structure.
What worries me about plastic is its tendency to become brittle over time. Most of us have experienced those horrific plastic garden chairs that don't last more than a year before they break. Whilst composite aircraft are clearly of superior quality, I like to see a manufacturer who is prepared to guarantee that his composite (plastic) aircraft will not suffer the same fate over time. There was a plastic glider that broke up in the UK in the late 70s. The owner had painted a dark green band around the rear fuselage just in front of the tail. The differential heat absorption from the sun seriously weakened the area and the tail broke off in flight. No-one can tell yet what we will be confronted with in the future or what people might do to their aircraft and I predict that many will have to be retired when we find out the real lifespan when they start to fail. I personally would need a lot of convincing before I bought one.

Jan 04, 2017 | Aircrafts

1 Answer

How to know if the aircraft is airworthy?


From a pilot's point of view, every aircraft comes from the factory with a checklist of things to look at specifically before every flight to ensure airworthiness. It's generally called a walk-around inspection, checking flight controls for security and condition, tire condition, engine for obvious problems. propeller, fuel and oil quantities. and many other things. The walk around also includes checking to ensure all required paperwork is there including weight and balance, airworthiness certificate, aircraft registration, operator's manual. etc. I would also check the log book to verify the transponder check was done within the past 24 months and the annual or 100 hour inspection is current. From an A&P mechanic point of view much the same applies, however I would look much closer at the maintenance logs for engine and airframe.

Jan 04, 2017 | Aircrafts

2 Answers

Why does the USA uses companies like Boeing and Lockheed to make there military aircraft and other military eqipment?


The cost in designing, developing, and testing an aircraft is staggering!!! Defense contractors as those you mention have extremely strict regulations to follow regarding export control and no equipment is sold to a foreign government without the express approval of the US gov't.

Jan 04, 2017 | Aircrafts

3 Answers

Is there a speed limit for airplanes?


There are some speed limits for certain types of airspace. Airliners are always in contact with air traffic control and in order to keep the required separation of aircraft sometimes the controllers will ask the pilot to maintain an airspeed. More than likely you experienced a slowdown while your plane was beginning an approach, During approach controllers have to maintain specific spacing between aircraft and often must slow them down behind slower aircraft. Your plane very likely was slowing down from approx 570 knots to 250 knots or less for the approach.

Jan 04, 2017 | Aircrafts

1 Answer

What is the smallest Cat3 certified plane type?


Are you asking about the certification of the aircraft itself (14 CFR part 3 vs. 14 CFR part 23?), or approval for instrument precision landings (ILS CAT III)? If the latter, it's really not an aircraft issue, but rather an equipment issue. That means you can have two aircraft of the same type, but one is equipped for CAT III and the other is not.

CAT III is basically autoland, which means it needs redundant navigation equipment, computer throttle controls, etc. But you could, in theory, outfit an old Citation with all that and get it approved (at some huge price <G>). And, don't forget, the crew needs to be certified as well.

Jan 04, 2017 | Aircrafts

2 Answers

How can air traffic controllers determine when it's clear for takeoff and landing?


They go through very intense training to be able to sequence aircraft safely. If there's a controller then there's at least a Class D area and all aircraft operating in that area must contact tower and let them know where they are and what they want to do. This is the information that lets them determine when it's clear.

Jan 04, 2017 | Aircrafts

5 Answers

Why There are not new aircrafts ?


space has put an end to this type of spy aircraft and cost to operate is very expensive

Jan 04, 2017 | Aircrafts

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