7/21/2019 Hydrofoils : Their History, Types with advantages and Disadvantages

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Hydrofoil

Presented byHarsh Bhavsar (110410101004)

Abhay Chauhan (110410101008)

Suraj Solanki (110410101023)

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Contents

Definition History

Types with Pros & Cons.

References

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What is Hydrofoil?

A structure which, when

moved rapidly through water,generates lift in exactly thesame way and for the samereason as does the airfoil.

Second, the term "hydrofoil"is often used to refer to boatsusing hydrofoil technology.

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History

1861, Thomas Moy (An English Engineer)

In 1906, Italian engineer, inventor andaeronautical pioneer Enrico Forlanini haddriven a big Hydrofoil in Calm Water.

In 1918, Alexander Graham Bell made 5 tonweighted Hydrofoil.

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FS hydrofoils

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Advantages Of FS hydrofoil

Less drag

Cheap for Journey

Can be used in Sea

Highly Efficient

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Disadvantages of SP hydrofoil :

Less Stability (while turning) Higher manufacturing cost

Requires sufficient strength of wood

High cavitation

Around 50knots efficiency decreases

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SP hydrofoils

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Advantages Of SP hydrofoil

Can easily turn

Highly efficient

Cheap for Journey

Can be operated easily

Perfect choice for calm water

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Disadvantages Of SP hydrofoil

High manufacturing cost less cavitation compared to FS

Not merged fully

Less suitable for Sea (transonic flow)

Requires sufficient strength of wood

Around 50knots efficiency decreases

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It is very difficult to control all thesupports for human. So to operatethem according to the Speed, flow

direction & manoeuvring, AutopilotSystem(same used in A/c) is used.

Here to improve lift in Hydrofoil, highlift devises like flaps can also be used.

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Boings Jetfoil

Capacity : 250 persons

Speed : 50 miles/hour

Uses jet of water as a

thrust

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Hydropter

It had a high speed record

(51.32knots). Once the boat reaches 10 knots,

these immersed wings, deployedat 45 degrees in the water,generate an upward thrust.

the shape of Hydroptere has been

optimized to ensure a greaterefficiency of the sails whileminimizing as much as possible theair friction on the structure of thesailing boat

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They also installed on board ahundred sensors whichmeasure the pressures, the

twisting or the speed. The data acquired are

modelled in a flight simulatorto analyze every reaction ofthe boat and to improveadjustments

They also equipped the crossbeams with huge strainabsorbers.

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References

http://en.wikipedia.org/wiki/Hydrofoil http://www.hanleyinnovations.com/multisurface/msa_hydr

http://hydroptere.com/en/the-sailing-boats/l-hydroptere-e

https://www.youtube.com/watch?v=zFxHUnaNIXw&featurembedded

Scope magazine (15)

http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/https://www.youtube.com/watch?v=zFxHUnaNIXw&feature=player_embeddedhttps://www.youtube.com/watch?v=zFxHUnaNIXw&feature=player_embeddedhttps://www.youtube.com/watch?v=zFxHUnaNIXw&feature=player_embeddedhttps://www.youtube.com/watch?v=zFxHUnaNIXw&feature=player_embeddedhttps://www.youtube.com/watch?v=zFxHUnaNIXw&feature=player_embeddedhttp://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/http://hydroptere.com/en/the-sailing-boats/l-hydroptere-en/