With an aluminum block with steel cylinder sleeves and weighing in at 2,900 pounds, the engine had a 6.4:1 compression ratio, and a centrifugal supercharger; later models were also fitted with an intercooler. The U.S. Navy did not have any PT boats stationed in the Aleutians, so it had to transfer them from another location. The engines were dry sump with an external oil tank which had special baffles to reduce foaming. Five aero variants were produced, of which the 3A-2500 was the most numerous. Outboard engines are designed specifically for boating, whereas inboard motors are usually just automobile engines that have been modified for marine use. These vessels were up to 50 percent longer and sleeker than the PTs. The USN assigned the boat the designation of "PT-9" and formally accepted the type on an experimental basis, ordering 10 examples as PT-10 through PT-19 and requiring use of 3 x Packard marine gasoline engines of 1,200 horsepower each as well as revised crew areas. The PT boat fully matured during World War I. PT boats made during World War I were powered by steam. Although cosmetically an impressive sight, closer inspection revealed that PT-728 would in actuality need an almost complete restoration. After 10 years and more than 100,000 hours of work by 200 volunteers, the U.S. National WWII Museum's historic patrol-torpedo boat PT-305 has been $23.10 $ 23. After the campaign, the U.S. Navy returned the PT boats to Seattle. Naval Historical Center FAQ [USN] US Navy PT Boat Lists; PT Boats Webring The incident shows the critical role that PT boats performed in the Pacific Theater to screen U.S. bases and warn U.S. fleets of threats. Their superchargers, intercoolers, dual magnetos, and two spark plugs per cylinderreflected their aircraft … There is one case on record where they had to sweep up the pieces of what once had been a bee-utiful PT because some lunkhead started his engines while floating in the middle of that 100 octane stuff. By the end of the war, Elco had built 399 boats and Higgins had constructed 200. Additional Links & Resources. Many major powers have experimented with these kinds of vessels, including Great Britain, United States, Russia, Italy, Japan, Germany, and Canada. The PTs made repeated attacks over three hours but were unable to score any hits. One of 3 engines on board. When World War II began, the small craft that came to be known as the PT boat was less than 40 years old. Five aero variants were produced, of which the 3A-2500 was the most numerous. Production of the Scott-Paine boat, which was designated PT-9, began in New York on September 5, 1939. Engines 3 engines, supercharged Packard V12 model 4M-2500. Their shallow drafts gave them a distinct advantage over vessels with deep drafts. The engines were fresh water cooled via fairly small tube type heat exchangers, as were the V-drives. PT-109 belonged to the PT-103 class, hundreds of which were completed between 1942 and 1945, by Elco, in Bayonne, New Jersey.The ship's keel was laid 4 March 1942, as the seventh motor torpedo boat (MTB) of the 80-foot-long (24 m) class built by Elco, and was launched on 20 June and delivered to the Navy on 10 July 1942 to be fitted out in the New York Naval Shipyard in Brooklyn. PT 109 was one of the hundreds of motor torpedo boats (PT) of the PT 103 class completed between 1942 and 1945 by Elco Naval Division of Electric Boat Company at Bayonne, New Jersey.The Elco boats were the largest in size of the three types of PT boats built for U.S. use during World War II. Saved by Rocketfin Hobbies. Their wooden hulls required too much maintenance, and their three massive V12 engines burned far too much gasoline (the equivalent of 0.1 miles per gallon at full throttle) for peacetime use. . The principal PT was Elco’s 80-foot-long boat. Sep 29, 2012 - PT Boat Packard V12. The supercharger was toward the stern and the gear shifter toward the bow. It revolutionized small boat tactics. It had quickly become evident that the project was going to be more complicated and expensive than planned and Packard lost $300,000.00 (1939 dollars) on the 3M-2500 project. As for the Huckens PT boats, the U.S. Navy designated those for use by the PT boat training squadron in Melville, Rhode Island, as well as to the Panama Canal Zone and the Hawaiian Islands. 1941 PT 1-2 Length: 58-feet; Beam 16-feet; Draft 4-feet 4-inch; weight 30 tons; Speed: 30 kts; 2 engines 1000Hp; 2 screws with 2 rudders; carried 2 officers 1940 PT 3-4 Length: 58-feet; Beam 16-feet, Draft 4-feet 4-inch; weight 30 tons; Engines: 2 at(@) 1200 Hp; 2 screws (propellers) with 2 … Much, but not all of the above information comes from. "The wake is amazing! at 2400rpm, some source state 1,800 hp.but that was the emergency rating at 2800rpm according to Packard documents. It changed the world more than any other single event in history. An Elco PT boat fires MK torpedoes during a sea test. The engines were dry sump with an … All U.S. PT boats were powered by three 12-cylinder gasoline-fueled engines. Discussions between Assistant Secretary of the Navy Charles Edison and Henry R. Sutphen, executive vice-president of the Electric Launch Company (Elco), led to the signing of a contract in 1941 whereby Sutphen’s company would furnish the U.S. Navy with PT boats. Seventh Fleet were traveling at high speed into the Mindanao Sea just south of Leyte Gulf. The Navy did not use the Huckens boats in combat, however. Unable to thwart the Japanese battleships, the PT boats retired and the next day U.S. destroyers moved in to engage them. In order to have a chance of hitting their target, PT boats had to close to within 2 miles (3.2 km) for a shot, well within the gun range of destroyers; at this distance, a target could easily maneuver to avoid being hit. Beginning on August 11, 1942, the U.S. Navy began shipping PT boats from Pearl Harbor to Seattle, Washington, for overhaul at the Olson-Winge Marine Works. A PT boat (short for Patrol Torpedo boat) was a torpedo-armed fast attack craft used by the United States Navy in World War II. Times when the very landscape appears to shift. At Close Quarters: PT Boats in the United States Navy. Packard built between 12,000 and 14,000 marine engines during the war,depending on the source, three of which went into each of the Navy's 768 PT boats, two astern and one amidships for better service access and the British Vosper MTB's (Motor Torpedo Boats) in addition to the USAAF 85’ Air Sea Rescue Boats which used two per boat. With a full fuel load, the PT boat had a range of 259 miles at 35 knots, which amounted to a total of 518 miles. Improvements upon Packard's World War I Liberty L-12 2A engine, the successive "M" for "marine" designated 3M-2500, 4M-2500, and 5M-2500 generations all featured slight changes and more power. As for the tenders themselves, they would be fueled by tankers. See specs, photos and pricing on Boat Engines at www.heinenmotorsports.com. But the war ended before this became necessary. Merit International MRT64801 1:48 Merit US Navy Elco 80' Motor Patrol Torpedo Boat Late Type [MODEL BUILDING KIT] by. Air-cushioned hovercraft vessels also achieve the same outcome. Additional Links & Resources. We Make Sure Your Experience With Us Runs SmoothlyWhether you're purchasing a new Alweld or Jones Brother's boat, or maintaining your current boat powered by Yamaha, PT Marine will do things right the first time. To do this, they were armed with torpedoes, rockets, mortars, and machine guns. In carrying out this mission, the PTs were opposed by German Navy E-Boats and S-Boats. Throttle push rod deck housings with all sections and end blocks for PT 103-196 in 1/35th, 1/32nd, 1/24th, 1/20th, and 1/16th scales added. Both the engines and boat are in great condition and work without a hitch. But steam engines eventually gave way to small internal combustion engines … Specifications. 178. However, the basic dimensions remained. The Model PT Boat Site. Top-Notch Service Offering quality service in whatever we do, whether it's boat sales, maintenance, or repair. The boats would launch their torpedoes then disappear into the night as the enemy returned fire. Because they were fueled with aviation gasoline, a direct hit to a PT boat's engine compartment sometimes resulted in a total loss of boat and crew. It turned out that the PT boats were ill equipped for service in the extreme environment of the Alaskan waters, though. About the value. I don't know if the connector duct was used on non-heater equipped boats or on PT 163-196, or if cover plates were used. The early engines required 91 octane gas, but the early W7-W8 models were up to 100 octane and toward the end of production, serveral Korean War veterans state that the model W14 required 115/135 octane (green avgas), although the Operators Manual, located in the Manuals & Publications section does not specify anything higher than 100 octane. The distance was considered too far for the boats to complete in one hop, even if they were escorted by tender, so the Navy set to work to devise a more viable plan. A key part of the overhaul was the installation of 20mm guns. There were 1M, 2M, and 3M series marine engines so the 4M-2500 was not a brand new engine but a new generation engine. PT-617 is a PT-103-class Elco motor torpedo boat of the same type as the famous PT-109 commanded by future President, John F. Kennedy. Read About Us Authorized […] The license built Merlin engines were not produced by Packard until well into the war years and were of smaller displacement (1670 CID). By dusk they had taken up position in a patrol line. S/N BWC5J2361394. Ensign Peter Gadd, who operated the radar aboard PT-131, picked up the battleships on radar at 10:36 pm. PT 109 was one of the hundreds of motor torpedo boats (PT) of the PT 103 class completed between 1942 and 1945 by Elco Naval Division of Electric Boat Company at Bayonne, New Jersey.The Elco boats were the largest in size of the three types of PT boats built for U.S. use during World War II. The Packard 1A-2500 is an American V-12 liquid-cooled aircraft engine designed by Packard in 1924 as a successor to the World War I-era Liberty L-12. The U.S. Navy subsequently awarded a contract to Elco on December 7 for 11 motor torpedo boats and 12 motor boat submarine chasers. Watch as volunteer crewman Ron Taylor checks engine after startup of the Packard V12 gas engines on Higgins PT658 located in Portland OR. These types of operations would continue until the majority of the French coast was in Allied hands. See specs, photos and pricing on Boat Engines at www.heinenmotorsports.com. Three days later the Japanese began landing troops on Attu and Kiska, where U.S. weather stations were located. 2018 April 26, toe rails for the 1/72nd scale 2018 Revell PT 109 kit added. Saved from williammaloney.com. The origins of the PT boat can be traced back to the American Civil War. Three marine versions, used most prominently in American World War II PT-boats, the 3M-2500, 4M-2500, and 5M-2500, were also derived from it. Packard built 14,000 marine engines during the war on East Grand Avenue, Detroit and the US navy's 768 PT boats were fitted with three of them, two astern and one amidships for … All US Navy Motor Torpedo Boats (PT Boats) of World War II; listed by class, with descriptions and links to pages for individual boats. By the Korean War the heat exchangers were prone to getting small pin-hole leaks. ... His research shows that Elco 80' boats were equipped with 28" diameter propellers until PT 613 (direct drive boats) which used 29" diameter propellers. Outboard engines were reversed with V drives, some later boats may have had outboard engines spaced farther apart facing the same way as the center engine. 5.0 out of 5 stars 1. In the aftermath of World War II the United States and other countries have experimented with missile-carrying, next-generation fast patrol boats. In fact, all US PT boats of the war were propelled by the same 3 x Packard 2500-series 12-cylinder gasoline engines which were progressively uprated from the original 3M-2500 to the 4M-2500 and, finally, the 5M-2500. The Elco PTs served mainly in the Pacific; however, a small number also were used in the English Channel and the Mediterranean Sea. Tour the worlds only operating authentically restored WW2 Higgins PT Boat PT658 Engine room! Under the Operators Manuals button you will find a PT Boat Engineers Handbook; essentially a Packard Manual without pictures. And if you see gasoline around another boat, don't just sit around waiting to see things pop-find one of the boat officers and tell him about it. The U.S. Navy had little interest during that conflict in PT boats, but by 1938 it became interested in developing them. The Imperial Japanese Navy routinely sent ships out at night during this period to deliver personnel, supplies, and equipment to Japanese forces operating in and around New Guinea and the Solomon Islands. Six years later the British Alfred Yarrow shipyard began experimenting with spar torpedoes that naval engineers mounted on the bow of a 30-foot steam launch. The two engines face aft, through Joe’s Gear transmissions, each drive shaft connecting into a Watson and Flagg V-drive which then drove the prop shafts back  under each engine. The first engines developed 1,200hp, but later models with higher boost levels by the end of World War II made 1,500 hp. The PT boat fully matured during World War I. PT boats made during World War I were powered by steam. PT boat duty was very dangerous and the squadrons suffered an extremely high loss rate in the war. But there’s NEVER been anything like THIS before. The only major revision from the Scott-Paine model was the use of a Packard engine in lieu of one from Rolls Royce. This engine was used for both the 85 ft. crash boat, the more common PT-boats and The British Power Boat Co. high speed rescue launches . While PT-boats had an option to muffle their engines by routing the exhaust underwater, no such option was on either the 63' or 85' rescue boats, so with straight pipes, stealth operations were never an option. The captain did not have direct control of engaging, disengaging or reversing the Packard V12s. 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