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