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 The Turtle

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Milan
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Registration date : 27.02.2008

PočaljiNaslov: The Turtle   3/4/2012, 00:14

The Turtle
"Kornjaca"




The Turtle (also called the American Turtle) was the world's first submersible with a documented record of use in combat.
It was built in Old Saybrook, Connecticut in 1775 by American Patriot David Bushnell as a means of attaching explosive charges to ships in a harbor.

Bushnell designed it for use against British Royal Navy vessels occupying North American harbors during the American Revolutionary War.
Connecticut Governor Jonathan Trumbull recommended the invention to George Washington; although the commander-in-chief had doubts, he provided funds and support for the development and testing of the machine.

Several attempts were made using the Turtle to affix explosives to the undersides of British warships in New York Harbor in 1776. All failed, and her transport ship was sunk later that year by the British with the submarine aboard.

Bushnell claimed eventually to have recovered the machine, but its final fate is unknown.
Modern functional replicas of the Turtle have been constructed; the Connecticut River Museum, the Submarine Force Library and Museum, and the Royal Navy Submarine Museum have them on display.

Named for its shape, Turtle resembled a large clam as much as a turtle; it was about 10 feet (3.0 m) long (according to the original specifications), 6 feet (1.8 m) tall, and about 3 feet (0.9 m) wide, and consisted of two wooden shells covered with tar and reinforced with steel bands.

It dived by allowing water into a bilge tank at the bottom of the vessel and ascended by pushing water out through a hand pump.
It was propelled vertically and horizontally by hand and legs-cranked propellers.
It also had 200 pounds (91 kg) of lead aboard, which could be released in a moment to increase buoyancy.
Manned and operated by one person, the vessel contained enough air for about thirty minutes and had a speed in calm water of about three miles per hour (5 km/h)


LEGO model:



Ovaj model je napravljen po uzoru na istorijski model podmornice na ljudski pogon, prvu ikad koriscenu u borbi.

Prvo sam krenuo od pravljenja sto savrsenije kugle od Plates-a precnika 21 studs.
Zidovi su morali biti sto tanji i sto jaci.
Dalje kuglu sam morao napraviti tako da se stranice razdvajaju da se moze videti unutrasnjost.
Isto tako donji deo je napravljen od \utih delova, sto bi trebalo da bude deo sa tegom koji pomaze podmornici da stoji uspravno u vodi.
Gornji deo je morao biti ravan.
Centralno deo izduzen kao kod jajeta.
Ukratko, pravljenje svega ovoga od lego delova je bio pravi izazov.








Kad je zavrsena spoljasnjost, poceo sam da pravim unutrasnjost, odnosno brijne poluge i mehanizme koji se nalaze i u pravoj podmornici.



Sistem rada prave "Kornjace" je sledeci: Covek koji upravlja njome ima oko 30 minuta da dise u podmorici i za to vreme mora da se priblizi neprijateljskom brodu i da sa busilicom na vrhu podmornice izbusi rupu u brodu, zatim spusta podmornicu a burgija ostaje zaglavljenja u brodu i busilica je vezana lancem za bombu koja se nalazi na podmornici.
posle par minuta bomba ekspodira.
Ceo tekst sam postavio na vrhu stranice sa Wiki.

Operaer upravlja podmornicom da dva propelera i kromilom. Horizontalni propeler se pokrece nogama a vertikalni rukom, kormilo isto rukom, kao i usilica i svi ostali mehanizmi.

Pogledajte video:




Ovaj model je napravljen za takmicenje na Technic forumu u okviru Eurobricks foruma, bice glasanje za dve nedelje, nadam se da ce clanovi koji imaju profil tamo i kojima se svidi ovaj model, glasati za "Kornjacu"
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