What are all the demerits in having a winglet

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SUMMARY

The discussion highlights several demerits of winglets in aviation, particularly focusing on their impact on aircraft performance and costs. Key drawbacks include the fixed costs associated with purchasing winglets as an aftermarket feature, the expenses incurred from taking aircraft out of service for installation, and the need for additional routine inspections. Furthermore, winglets increase the overall weight of the aircraft due to the additional structure required for support and alter the aeroelastic behavior of the wings. While WestJet reported a 10% fuel savings relative to installation costs, the benefits may vary based on fleet utilization and operational routes.

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  • Understanding of aerodynamic principles related to wing design
  • Familiarity with aircraft maintenance and operational costs
  • Knowledge of fuel efficiency metrics in aviation
  • Basic concepts of aeroelasticity in aircraft structures
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  • Explore case studies on WestJet's implementation of winglets
  • Investigate the principles of aeroelastic behavior in aviation
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Aerospace engineers, aviation maintenance professionals, and anyone involved in aircraft design and operational efficiency will benefit from this discussion.

sakthivelzz
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Hi everyone! I'm new to this community ...I need to know few things about winglets..

1) what are all the demerits in having a winglet other than adding up wingloading,viscous drag ?

please reply only if ur sure about your answer as am working out for my thesis...

thank you...
 
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sakthivelzz said:
1) what are all the demerits in having a winglet other than adding up wingloading,viscous drag ?
There is a fixed cost in buying them, especially as an after-market feature.
Plus the cost of taking the aircraft out of service to install them and the extra cost of routine inspections.

West-jet were trying them on their fleet and published some numbers showing the fuel savings had saved about 10% of the cost of installing them.
Mostly because they have very high fleet utilization - so aircraft out of service are very expensive, and they fly mostly commuter routes so spend proportionally less time at cruise where the fuel savings are greatest
 


Cons:
-Additional structure required to support them
-Thus additional weight to the aircraft
-Aeroelastic behavior changes

Just a few off the top of my head
 

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