I have not looked at the layout of the PTs but the difference in the number of engines may be due to the need to allow space for the dispensary with eight litters in the stern of the crash boats, or due to the additional weight of the torpedoes. PT boats 1 and 2 were a 59' Crouch design built by Fogal Boat Yard Inc. On PT 103-162 boats with heaters (possibly PT 139-141 only), the sections of the throttle push rod deck housing that ran alongside the day room cabin trunk (sections 2, 3, and 4) were also used as a heater duct. The engines were fresh water cooled via fairly small tube type heat exchangers, as were the V-drives. PT boats were only really useful for a navy at war. See specs, photos and pricing on Boat Engines at www.heinenmotorsports.com. The supercharger was toward the stern and the gear shifter toward the bow. 45. Ask for this F25 Portable Mechanical ES/MS PT by stock number or make and model. Read About Us Authorized […] 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 … 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. PT boats constituted a unique class of fighting ship. E-boat was the Western Allies' designation for the fast attack craft (German: Schnellboot, or S-Boot, meaning "fast boat") of the Kriegsmarine during World War II; E-boat could refer to a patrol craft from an armed motorboat to a large Torpedoboot.. The Navy decided to have the PTs fueled from the tenders. 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 first engines developed 1,200hp, but later models with higher boost levels by the end of World War II made 1,500 hp. 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. There are some more detail shots in the Higgins PT Boat Engine Room gallery that show the transmission shift lever better. British boat designer Hubert Scott-Paine was the brains behind the motor torpedo boat. Saved from williammaloney.com. His understanding was that if he bought the Scott-Paine boat, the Navy would purchase it. $23.10 $ 23. 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. 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. 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. 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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. Pitch = inches traveled per revolution (with no slip) and relates to the blades angle to the hub. Your boats speed and handling depend directly on the outboard engine used to power it. See specs, photos and pricing on Boat Engines at www.heinenmotorsports.com. He would have to call down to the engine room to make any of those changes. While Packard was also … All US Navy Motor Torpedo Boats (PT Boats) of World War II; listed by class, with descriptions and links to pages for individual boats. Both propellers turned the same way, clockwise (right-handed), looking from aft. PT boat duty was very dangerous and the squadrons suffered an extremely high loss rate in the war. 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. The PT boat fully matured during World War I. PT boats made during World War I were powered by steam. Attu Island, the westernmost in the chain, is only 650 miles from the northern part of the Japanese-owned Kurile Islands where Japanese forces were based. The Vosper 73 foot Motor Torpedo Boat was a mid-twentieth century British motor torpedo boat (MTB) designed by Vospers that served in the Royal Navy Coastal Forces during the Second World War. One of 3 engines on board. WWII Quarterly, the hardcover journal of the Second World War that is not available in bookstores or on newsstands, and can only be obtained and collected through a personal subscription through the mail. With the exception of the experimental PT boats, all U.S. PT boats were powered by three marine modified derivations of the Packard 3A-2500 V-12 liquid-cooled, gasoline-fueled aircraft engine. Harrowing encounters unfolded as PT boats used their torpedoes and other weapons in an attempt to sink Japanese ships and troop-carrying barges. In the annals of military history magazines, this is one of those moments. NEW ORLEANS (AP) — Engines growling, its bow high above the water and a rooster-tail of spray rising in its wake, the nation's only fully restored combat veteran PT boat traced the course where it was tested in 1944 on the tidal basin that forms New Orleans' shoreline. 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. 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. However, the basic dimensions remained. Both propellers turned the same way, clockwise (right-handed), looking from aft. $121.45 $ 121. The boats would launch their torpedoes then disappear into the night as the enemy returned fire. Engines 3 engines, supercharged Packard V12 model 4M-2500. Complete Outboard Engines. Three PT boats began closing on the target to make their attack. As mentioned earlier, 85’ ASRs also had two Chrysler 6 cylinder “cruising engines” in the original design, others say they were Kermath marine conversions of 110 hp Ford V-8s, although very few were actually built, which may have taken the space of the third Packard engine installed on the PT boats. Specifications. Contrary to some sources, the Packard V12 4M-2500 marine engine did not start its life as a copy of the British Rolls Royce Merlin engine. 4.4 out of 5 stars 4. The boats never saw service as PT boats due to performance problems. Additional Links & Resources. 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 What is more, they were hard to see on the horizon against the ocean. In twin-screw installations the ideal arrangement is to have the tops of the propeller blades turning outward for better maneuvering qualities but this was not available with the Packard engines in the 85s which made docking a bit more challenging as it was almost impossible to get the stern to move to starboard. ... His research shows that Elco 80' boats were equipped with 28" diameter propellers until PT 613 (direct drive boats) which used 29" diameter propellers. The PT boat fully matured during World War I. PT boats made during World War I were powered by steam. PT Boat PT-617 (Elco) PT-617 is an Elco class PT Boat.PT-617's specifications are: Length: 80 feet Beam: 19 feet 11 inches Draught: 4 feet Crew: 2 officers and 9 crewmen Displacement: 51 tons fully loaded Max Speed: 41kts (46mph) Fuel Capacity: 3,000 gallons of 100 octane avgas Range: 358 miles at 35kts, 1050 miles on one engine, 11 knots Oil Capacity: 30 gallons What was needed was a self-propelled torpedo. Based on the Packard 3A-2500 aircraft engine. These feature hydrofoils to lessen drag and increase speed. 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 Elco PTs served mainly in the Pacific; however, a small number also were used in the English Channel and the Mediterranean Sea. But steam engines eventually gave way to small internal combustion engines that offered faster speed and were less expensive to produce. Since the museum plans to operate PT-728 for public excursions, it was decided that a full restoration was in order, including new and more powerful engines. They were intended to intercept ships of larger classes through firepower and speed. The engines held origins dating back to the US Army's "Liberty" bomber aircraft but were of course modified for marine service. Check out this New Gray Yamaha F20 Portable Tiller ES PT available from Heinen Motorsports in Osseo, Minnesota. 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. Sep 29, 2012 - PT Boat Packard V12. (i.e., 3A-2500 then 3M-2500). This website is used to educate the public and to keep them informed on the status of the World War II, Higgins PT Boat. The journey of the boats from New Guinea to Leyte Gulf, which was approximately 1,200 miles, presented a difficult problem for the U.S. Navy. The Navy steadily increased the horsepower from 1,100hp to 1,500hp so that the PT boats could maintain high speed as increasingly heavier armament was added to them. There were 1M, 2M, and 3M series marine engines so the 4M, -2500 was not a brand new engine but a new generation engine. 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. 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. They don't call them fast attack boats for nothing ! The U.S. Navy’s ship commanders in the Philippines depended on the PT boats at Leyte for an advance warning of the approach of the Japanese fleet. There were 1M, 2M, and 3M series marine engines so the 4M-2500 was not a brand new engine but a new generation engine. Check out this New Gray Yamaha F25 Portable Mechanical ES/MS PT available from Heinen Motorsports in Osseo, Minnesota. Because of Packard’s involvement with myriad of aviation engines, it is a common misconception that the Packard Merlin was used in WWII PT boats. The early 85’ boats were equipped with W12s. at 2400rpm, some source state 1,800 hp.but that was the emergency rating at 2800rpm according to Packard documents. The race boats used the Packard built, Roll Royce Merlin V1650 aircraft engine, which is a completely different engine and has nothing in common with the Packard PT boat engine, except that they both had 12 cylinders. Contrary to some sources, the Packard V12 4M-2500 marine engine did not start its life as a copy of the British Rolls Royce Merlin engine. 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. Additionally, an outboard engine affects both safety and performance. 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. A key part of the overhaul was the installation of 20mm guns. There are two main types of propulsion systems for boats – outboard motors and inboard engines. 178. The U.S. Navy did not have any PT boats stationed in the Aleutians, so it had to transfer them from another location. 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. This booklet was created months before the end of a deadly, bitterly fought war with Imperial Japan. The PT boat fully matured during World War I. PT boats made during World War I were powered by steam. An Elco PT boat fires MK torpedoes during a sea test. Outboard Boat Motors & Engines Different Sizes and Types of Outboard Motors and Inboard Engines. There is disagreement among sources as to whether the Packard 4M-2500 marine engine was an updated Packard Liberty engine which was introduced in 1924. A deal eventually was struck whereby the British Power Boat Company sold its private venture motor torpedo boat to the U.S. Navy. 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. Naval Historical Center FAQ [USN] US Navy PT Boat Lists; PT Boats Webring The U.S. Navy ended up destroying most of its PT boats because the light wood from which they were made could not be stored for future use as could the steel used in decommissioned warships. 2017 May 27, .50 cal. On June 3, 1942, the Japanese attacked the U.S. naval base at Dutch Harbor on the island of Unalaska. 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. These vessels were up to 50 percent longer and sleeker than the PTs. 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 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. They were powered by by two V2500-2 1200 horse power Vimalert engines, produced by the Stirling Engine Company. The only heat on PT boats came from the stoves located in the galley, which was a small alcove off the crew’s quarters. The license built Merlin engines were not produced by Packard until well into the war years and were of smaller displacement (1670 CID). In the Mediterranean Sea PT boats patrolled the coasts of southern France and northern Italy. Fast-moving, heavily armed U.S. Navy PT boats harried enemy forces in the Pacific and European Theaters in World War II. Top-Notch Service Offering quality service in whatever we do, whether it's boat sales, maintenance, or repair. Their superchargers, intercoolers, dual magnetos, and two spark plugs per cylinderreflected their aircraft … After the challenges were overcome, they had redesigned the engine patterns, upgraded the quality control and metallurgy standards and made many major changes that involved extensive redesign. 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. A number of the PTs were overhauled in anticipation of being sent to the Pacific. These next-generation patrol boats, which improve on the design of the World War II-era PT boat and continue that tradition, are an important way to protect coastal waters. The Aleutians Campaign entered its final phase in mid-August when U.S. forces seized Kiska Island. 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. 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. The 4M-2500 is at best, a distant cousin. 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 ease of servicing. B uilt by the Electric Launch Company of Bayonne, New Jersey, she was laid down on 29 March 1945, launched on 28 July, and was not completed until after the end of the war on 21 September. 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. S/N BWC5J2361394. But there’s NEVER been anything like THIS before. The engines were dry sump with an … Despite their shorter length, the PT boats held their own against the Germans. 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. 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. 2010 March 1 update: Added camber information, and fuel tank capacity corrected. The modelling objective here is to make an operational 1/20th scale Packard V12 Marine Engine that looks like the original V12 engine but is actually an electric motor (and possibly gearbox) housed in a cast shell and when completed it should fit the exact mounting bed of the original engine. The Elco model was the longest of the three types of PT boats built for the U.S. Navy. During typical usage, PT boat captains managed on one engine to conserve fuel and also preserve the element of surprise. The boats harassed shore installations in support of Allied troop landings, destroyed floating mines, rescued downed pilots, and landed partisans behind enemy lines. The combination of a self-propelled torpedo and a power-driven boat became of great interest to both major and minor naval powers and they clamored for torpedo boats. The Packard PT boat engine stemmed from the Packard 1A-2500, 2A-2500, 3A-2500, 4A-2500 and 5A-2500 family of aviation engines … But steam engines eventually gave way to small internal combustion engines … The PT boats radioed their sighting to Rear Admiral Jesse Oldendorf, commander of Task Group 77.2 that was guarding the Surigao Strait. It changed the world more than any other single event in history. A Holley 1685F aircraft carburetor supplied the fuel, fired by two spark plugs per cylinder. 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. By the Korean War the heat exchangers were prone to getting small pin-hole leaks. See more ideas about pt boat, boat, e boat. 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. 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 regularity of these runs compelled the Allies to call them the Tokyo Express. Night after night the sailors in these PT boat squadrons risked their lives in an effort to disrupt and destroy the Japanese convoys. The engine continued to be  a four-stroke, 60-degree V-12 with a 6.40-inch bore and a 6.50-inch stroke, which brought it to 2,490 cubic inches, with four valves per cylinder. A third manufacturer, Huckens of Jacksonville, Florida, built just 18 boats. Additional Links & Resources. 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. The spar torpedo proved highly effective; however, by being so close to the explosion, the crew of the attacking vessel was in danger of being blown up as well. The Packard engine series was progressively uprated with the arrival of the super-charged, water-cooled 4M-2500 (1,200 to 1,500 horsepower) and the final production 5M-2500 of 1,850 horsepower (3 x 1,850 = 5,550 combined horsepower). PT also were used to support the D-Day invasion on June 6, 1944. After further conferences with the Navy, Stuphen traveled to England to buy the boat with his own money. Ask for this F20 Portable Tiller ES PT by stock number or make and model. Whitehead’s self-propelled torpedo was designed to strike a vessel below the water line. Saved by Rocketfin Hobbies. These engines were built by the Packard Motor Car Company, and were a modified design of the 3A-2500 V-12 liquid-cooled aircraft engine. The U.S. Navy shipped a number of PT boats to Great Britain and the Soviet Union through the Lend-Lease program. The final engine was a super-charged, water-cooled, gasoline-powered V-12 engine that weighed 2,900 pounds. Specific boats are listed in numerical order. Senior Packard management report that Jesse Vincent, Packard’s lead engineer, started on the 3M-2500 experimental engine in 1939 based on converting the Packard 2500 aircraft engine into a marine version and seven were built for the U.S. Navy. In 1939 Edison had informed the General Board of the U.S. Navy, an advisory council composed of senior admirals, that a 70-foot motor torpedo boat was available in Great Britain. The Navy did not use the Huckens boats in combat, however. The islands stretch nearly 1,000 miles from the mainland into the North Pacific. Shortly after the United States entered World War II as many as a dozen manufacturers at home and abroad competed to furnish PT boats for the U.S. Navy. There have been countless thousands of published works devoted to all or of it. Air-cushioned hovercraft vessels also achieve the same outcome. 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. 2018 April 26, toe rails for the 1/72nd scale 2018 Revell PT 109 kit added. 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. But steam engines eventually gave way to small internal combustion engines that offered faster speed and were less expensive to produce. 5.0 out of 5 stars 1. 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