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79-414: (Redirected from V-42 ) V42 may refer to: Honda V42 Magna , a motorcycle ITU-T V.42 , an error-correction protocol LFG V 42 , a German sport aircraft Nissan Quest (V42) , a minivan V-42 stiletto , a fighting knife Vanadium-42 , an isotope of vanadium V 2 , the third inversion of the dominant seventh chord Topics referred to by

158-504: A radiator blind (or radiator shroud ) to the radiator that can be adjusted to partially or fully block the airflow through the radiator. At its simplest the blind is a roll of material such as canvas or rubber that is unfurled along the length of the radiator to cover the desired portion. Some older vehicles, like the World War I-era Royal Aircraft Factory S.E.5 and SPAD S.XIII single-engined fighters, have

237-407: A Spitfire . This is similar to Formula 1 cars of today, when stopped on the grid with engines running they require ducted air forced into their radiator pods to prevent overheating. Reducing drag is a major goal in aircraft design, including the design of cooling systems. An early technique was to take advantage of an aircraft's abundant airflow to replace the honeycomb core (many surfaces, with

316-406: A bellows type thermostat, which has corrugated bellows containing a volatile liquid such as alcohol or acetone. These types of thermostats do not work well at cooling system pressures above about 7 psi. Modern motor vehicles typically run at around 15 psi, which precludes the use of the bellows type thermostat. On direct air-cooled engines, this is not a concern for the bellows thermostat that controls

395-491: A carbureted bike which otherwise doesn't need pressure-fed fuel. For the 1985 and 1986 models, the sub-tank was dropped in favor of a slightly larger and wider main tank. Again because the reserve level of the tank was below the carburetors, the requisite fuel pump and series of fuel lines – although changed – were kept. Also for 1985 and 1986 the previously chrome, round rear fender became a painted single-piece unit much wider and taller like more classic cruisers which allowed for

474-427: A flap valve in the air passages. Other factors influence the temperature of the engine, including radiator size and the type of radiator fan. The size of the radiator (and thus its cooling capacity ) is chosen such that it can keep the engine at the design temperature under the most extreme conditions a vehicle is likely to encounter (such as climbing a mountain whilst fully loaded on a hot day). Airflow speed through

553-422: A harmfully false reading. Opening a hot radiator drops the system pressure, which may cause it to boil and eject dangerously hot liquid and steam. Therefore, radiator caps often contain a mechanism that attempts to relieve the internal pressure before the cap can be fully opened. The invention of the automobile water radiator is attributed to Karl Benz . Wilhelm Maybach designed the first honeycomb radiator for

632-470: A high ratio of surface to volume) by a surface-mounted radiator. This uses a single surface blended into the fuselage or wing skin, with the coolant flowing through pipes at the back of this surface. Such designs were seen mostly on World War I aircraft. As they are so dependent on airspeed, surface radiators are even more prone to overheating when ground-running. Racing aircraft such as the Supermarine S.6B ,

711-458: A less efficient but simpler construction. Radiators first used downward vertical flow, driven solely by a thermosyphon effect. Coolant is heated in the engine, becomes less dense, and so rises. As the radiator cools the fluid, the coolant becomes denser and falls. This effect is sufficient for low-power stationary engines , but inadequate for all but the earliest automobiles. All automobiles for many years have used centrifugal pumps to circulate

790-437: A liquid called engine coolant through the engine block and cylinder head where it is heated, then through a radiator where it loses heat to the atmosphere, and then returned to the engine. Engine coolant is usually water-based, but may also be oil. It is common to employ a water pump to force the engine coolant to circulate, and also for an axial fan to force air through the radiator. In automobiles and motorcycles with

869-444: A liquid-cooled internal combustion engine , a radiator is connected to channels running through the engine and cylinder head , through which a liquid ( coolant ) is pumped by a coolant pump. This liquid may be water (in climates where water is unlikely to freeze), but is more commonly a mixture of water and antifreeze in proportions appropriate to the climate. Antifreeze itself is usually ethylene glycol or propylene glycol (with

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948-447: A major area of research. The most obvious, and common, solution to this problem was to run the entire cooling system under pressure. This maintained the specific heat capacity at a constant value, while the outside air temperature continued to drop. Such systems thus improved cooling capability as they climbed. For most uses, this solved the problem of cooling high-performance piston engines, and almost all liquid-cooled aircraft engines of

1027-472: A pair of metal or plastic header tanks, linked by a core with many narrow passageways, giving a high surface area relative to volume. This core is usually made of stacked layers of metal sheet, pressed to form channels and soldered or brazed together. For many years radiators were made from brass or copper cores soldered to brass headers. Modern radiators have aluminum cores, and often save money and weight by using plastic headers with gaskets. This construction

1106-408: A racing seaplane with radiators built into the upper surfaces of its floats, have been described as "being flown on the temperature gauge" as the main limit on their performance. Surface radiators have also been used by a few high-speed racing cars, such as Malcolm Campbell 's Blue Bird of 1928. It is generally a limitation of most cooling systems that the cooling fluid not be allowed to boil, as

1185-470: A radiator is a major influence on the heat it dissipates. Vehicle speed affects this, in rough proportion to the engine effort, thus giving crude self-regulatory feedback. Where an additional cooling fan is driven by the engine, this also tracks engine speed similarly. Engine-driven fans are often regulated by a fan clutch from the drivebelt, which slips and reduces the fan speed at low temperatures. This improves fuel efficiency by not wasting power on driving

1264-469: A round chrome headlight and fenders. The headlight is a sealed beam type. The front disc brakes have straight grooves, dual piston calipers, and TRAC anti-dive. The speedometer reads 80 mph and the tachometer indicates a 10,000 rpm redline. The engine is a 748 cc (45.6 cu in) DOHC 16-valve liquid-cooled 90-degree V-4 linked to a six-speed transmission with a hydraulically actuated wet-plate clutch and shaft drive. The compression

1343-413: A separate small radiator to cool the engine oil . Cars with an automatic transmission often have extra connections to the radiator, allowing the transmission fluid to transfer its heat to the coolant in the radiator. These may be either oil-air radiators, as for a smaller version of the main radiator. More simply they may be oil-water coolers, where an oil pipe is inserted inside the water radiator. Though

1422-507: A series of shutters that can be adjusted from the driver's or pilot's seat to provide a degree of control. Some modern cars have a series of shutters that are automatically opened and closed by the engine control unit to provide a balance of cooling and aerodynamics as needed. Because the thermal efficiency of internal combustion engines increases with internal temperature, the coolant is kept at higher-than-atmospheric pressure to increase its boiling point . A calibrated pressure-relief valve

1501-402: A silver "MAGNA" tank decal. The exhaust system was now an upswept 4-into-4 set of pipes, truly unique in the cruiser world. Although the exhaust pipes were a beautiful sight, they were not friendly to the use of saddlebags as they were too high. The rear wheel was a solid aluminum disc . The chin fairing was unfinished black plastic for the 87, and color-matched for the 88. The second generation

1580-405: A small amount of corrosion inhibitor ). A typical automotive cooling system comprises: The combustion process produces a large amount of heat. If heat were allowed to increase unchecked, detonation would occur, and components outside the engine would fail due to excessive temperature. To combat this effect, coolant is circulated through the engine where it absorbs heat. Once the coolant absorbs

1659-585: A top speed of 225.49 km/h (140.11 mph), ranking it third of four motorcycles tested, less than 3.2 km/h (2 mph) slower than the Kawasaki GPZ1100 and Suzuki GS1100s . In spite of this, the V65 Magna appeared from 1986 to 1989 in the Guinness Book of World Records as the fastest production motorcycle with a "design speed" of 278 to 283 km/h (173 to 176 mph). During this period

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1738-594: A traditional chain drive. Facts from Cycle Magazine, July 1984 Various mechanical and cosmetic changes were introduced over the years, but the basic core of the Magna remained the same. The second generation Magna of 1987–1988 was dubbed the Super Magna by aficionados of the bike, though it was not an official Honda name. In 1987, the 699 cc engine produced 80 brake horsepower (60 kW) @ 9,500 rpm, with torque being 46 lb⋅ft (62 N⋅m) @ 7,500 rpm. In 1988,

1817-441: A wider rear tire. 1985 and 1986 saw new wheels too. Some of the trim around the Magna was changed as well, like the addition of a passenger back rest, smaller side covers, slightly lower seat and footpeg positions, brighter instrument cluster, slightly larger airbox covers, lighter front brake rotors, an improved radiator (now with a shut-off valve to greatly ease servicing), new exhaust, and the engine had silver case covers instead of

1896-648: Is 10.5:1. The 1982 V45 covered 1/4 mile in 12.08 seconds at 108.82 MPH. The 1983 V45 Magna is the same as the 1982 model with few differences. Early in the model year, the headlight was changed to a non-sealed beam unit with a replaceable halogen bulb. The front disc brake grooves are curved. The speedometer reads to 150 mph (240 km/h) but the redline on the tachometer is unchanged. (1983 starting SN JH2RC071*DM100011) The US government imposed tariff rate hikes for foreign-built motorcycles over 700 cc in order to combat their rise in sales in North America, and to aid

1975-406: Is different from Wikidata All article disambiguation pages All disambiguation pages Honda V42 Magna Though criticized for its long-distance comfort and lauded mainly for its raw acceleration, the Magna was the bike of choice for Doris Maron, a Canadian grandmother and accountant-turned-traveler who toured the world solo by motorcycle. She made the trek without the benefit of

2054-407: Is more difficult to build an aircraft radiator that is able to handle steam, it is by no means impossible. The key requirement is to provide a system that condenses the steam back into liquid before passing it back into the pumps and completing the cooling loop. Such a system can take advantage of the specific heat of vaporization , which in the case of water is five times the specific heat capacity in

2133-411: Is more prone to failure and less easily repaired than traditional materials. An earlier construction method was the honeycomb radiator. Round tubes were swaged into hexagons at their ends, then stacked together and soldered. As they only touched at their ends, this formed what became in effect a solid water tank with many air tubes through it. Some vintage cars use radiator cores made from coiled tube,

2212-557: Is technologically quite different from Honda's last V-four sport bike engine, the VFR750 Interceptor, which had gear-driven overhead cams and a 180-degree crankshaft. The Super's cams are also line-bored (a feature first seen in the Euro 1985 VF1000F & F-II, and 85/86 VF1000R, 1986 VF500F, 1986 VF700C Magna), which greatly reduced the premature cam wear that plagued the earlier models, together with changed oil ducts. The 1987 V45 Magna

2291-438: Is that the specific heat capacity changes and boiling point reduces with pressure, and this pressure changes more rapidly with altitude than the drop in temperature. Thus, generally, liquid cooling systems lose capacity as the aircraft climbs. This was a major limit on performance during the 1930s when the introduction of turbosuperchargers first allowed convenient travel at altitudes above 15,000 ft, and cooling design became

2370-437: Is usually incorporated in the radiator's fill cap. This pressure varies between models, but typically ranges from 4 to 30 psi (30 to 200 kPa). As the coolant system pressure increases with a rise in temperature, it will reach the point where the pressure relief valve allows excess pressure to escape. This will stop when the system temperature stops rising. In the case of an over-filled radiator (or header tank) pressure

2449-434: Is vented by allowing a little liquid to escape. This may simply drain onto the ground or be collected in a vented container which remains at atmospheric pressure. When the engine is switched off, the cooling system cools and liquid level drops. In some cases where excess liquid has been collected in a bottle, this may be 'sucked' back into the main coolant circuit. In other cases, it is not. Before World War II, engine coolant

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2528-491: The 1200 Madura (which had a 1/4 mile time of 11.66 s at 115.7 mph), and going up against such competition as the Suzuki GS1150E (10.47 s at 128 mph). The V65 lay somewhere between these two in performance, posting a quarter mile time of 11.29 s at 119.2 mph (191.8 km/h). The 1983 V65 Magna was tested at a top speed of 224 km/h (139 mph). In a 1983 Popular Mechanics achieved

2607-481: The 500 engine is not peaky and ample torque can be found throughout the rev band, and the six-speed transmission ratio was unique to this bike versus the ratio on the VF500F. The engine produced between 64 and 68 horsepower, and combined with its low weight and low center of gravity, the bike was lauded by critics as an easy to ride and entertaining motorcycle. The Magna had no shaft drive like its larger siblings, but

2686-551: The Mercedes 35hp . It is sometimes necessary for a car to be equipped with a second, or auxiliary, radiator to increase the cooling capacity, when the size of the original radiator cannot be increased. The second radiator is plumbed in series with the main radiator in the circuit. This was the case when the Audi 100 was first turbocharged creating the 200. These are not to be confused with intercoolers . Some engines have an oil cooler,

2765-539: The P-51 Mustang ) derive thrust from it. The thrust was significant enough to offset the drag of the duct the radiator was enclosed in and allowed the aircraft to achieve zero cooling drag. At one point, there were even plans to equip the Supermarine Spitfire with an afterburner , by injecting fuel into the exhaust duct after the radiator and igniting it . Afterburning is achieved by injecting additional fuel into

2844-512: The VF500F (1984–86). This engine is an evolution of Honda's original domestic market 400 cc engine, originally deemed too small and underpowered for certain markets - notably the United States and Europe. Focusing on adding power and versatility to its motorcycle offerings, Honda bored the original 400 cc motor and improved its power and performance. The engine is almost entirely identical to

2923-547: The Magna grew back to its original size of 748 cc. In countries other than the US, the Magna continued as a 750. The Magna V-four has endured through the first and second generations of the VF and VFR Interceptors - both come and gone by 1988. Like the original 750 Sabre and VF 750, this 750 Magna engine uses a 360-degree crankshaft and chain-driven double-overhead camshafts. Thus, the VF750C unit

3002-467: The World War II period used this solution. However, pressurized systems were also more complex, and far more susceptible to damage - as the cooling fluid was under pressure, even minor damage in the cooling system like a single rifle-calibre bullet hole, would cause the liquid to rapidly spray out of the hole. Failures of the cooling systems were, by far, the leading cause of engine failures. Although it

3081-413: The adoption of glycol or water-glycol mixtures. These led to the adoption of glycols for their antifreeze properties. Since the development of aluminium alloy or mixed-metal engines, corrosion inhibition has become even more important than antifreeze, and in all regions and seasons. An overflow tank that runs dry may result in the coolant vaporizing, which can cause localized or general overheating of

3160-549: The aircraft wings, fuselage and even the rudder. Several aircraft were built using their design and set numerous performance records, notably the Heinkel He 119 and Heinkel He 100 . However, these systems required numerous pumps to return the liquid from the spread-out radiators and proved to be extremely difficult to keep running properly, and were much more susceptible to battle damage. Efforts to develop this system had generally been abandoned by 1940. The need for evaporative cooling

3239-406: The black prior years had. These engines also had silver aluminum covers over the engine's shaft-drive output while prior years used black plastic covers, the engines were otherwise the same VF700 as 1984 with identical gear ratios and all. In 1986 some of the parts around the Magna now had the "Magna Bird" emblem present on the airbox covers, the driver seat, and the passenger backrest. For only 1986

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3318-472: The coolant temperature as the engine warms up. Engine coolant is directed by the thermostat to the inlet of the circulating pump and is returned directly to the engine, bypassing the radiator. Directing water to circulate only through the engine allows the engine to reach optimum operating temperature as quickly as possible whilst avoiding localized "hot spots." Once the coolant reaches the thermostat's activation temperature, it opens, allowing water to flow through

3397-437: The correct clearances. Another side effect of over-cooling is reduced performance of the cabin heater, though in typical cases it still blows air at a considerably higher temperature than ambient. The thermostat is therefore constantly moving throughout its range, responding to changes in vehicle operating load, speed, and external temperature, to keep the engine at its optimum operating temperature. On vintage cars you may find

3476-651: The domestic motorcycle manufacturers, namely Harley-Davidson . So for 1984 Honda responded by reducing the engine size for the VF750s to 698 cc by decreasing stroke on all of their 750cc engines, so the Magna became the VF700C in the USA. A side effect of this change was a higher-revving engine (redline now 10,500rpm) with similar power figures as the 750s. In 1984 rev limiters within the CDI units were added as well to help prevent over-revving that

3555-472: The engine coolant because natural circulation has very low flow rates. A system of valves or baffles, or both, is usually incorporated to simultaneously operate a small radiator inside the vehicle. This small radiator, and the associated blower fan, is called the heater core , and serves to warm the cabin interior. Like the radiator, the heater core acts by removing heat from the engine. For this reason, automotive technicians often advise operators to turn on

3634-459: The engine is producing. Allowing too much flow of coolant to the radiator would result in the engine being over-cooled and operating at lower than optimum temperature, resulting in decreased fuel efficiency and increased exhaust emissions. Furthermore, engine durability, reliability, and longevity are sometimes compromised, if any components (such as the crankshaft bearings) are engineered to take thermal expansion into account to fit together with

3713-410: The engine. Severe damage may result if the vehicle is allowed to run over temperature. Failures such as blown head gaskets, and warped or cracked cylinder heads or cylinder blocks may be the result. Sometimes there will be no warning, because the temperature sensor that provides data for the temperature gauge (either mechanical or electrical) is exposed to water vapor, not the liquid coolant, providing

3792-406: The engines had unique cylinder heads, the rear heads now featured a new cosmetic bolt-on piece and while all previous VF700s/VF750s used head bolts and more square valve covers 1986s were revised with line-bored camshaft journals thus taking different camshafts and valve covers. The new valve covers allowed for easier valve-rocker adjustment which would normally be a difficult procedure, but because of

3871-405: The enormous amount of heat energy soaked up during the generation of steam, equivalent to 500 °C. In effect, the evaporative version is operating between 80 °C and 560 °C, a 480 °C effective temperature difference. Such a system can be effective even with much smaller amounts of water. The downside to the evaporative cooling system is the area of the condensers required to cool

3950-494: The fan unnecessarily. On modern vehicles, further regulation of cooling rate is provided by either variable speed or cycling radiator fans. Electric fans are controlled by a thermostatic switch or the engine control unit . Electric fans also have the advantage of giving good airflow and cooling at low engine revs or when stationary, such as in slow-moving traffic. Before the development of viscous-drive and electric fans, engines were fitted with simple fixed fans that drew air through

4029-405: The four cylinders provided a much smoother delivery of power than a V-twin. Good engine balance, plus short stroke and large piston diameter allowed for a high redline and potential top speed. Besides the engine configuration, the bike had water-cooling, a six-speed transmission for good economy at highway speed, and common on other middleweight bikes for Honda in the early 1980s, shaft drive. While

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4108-466: The front. A drum brake was used on the rear. A few internal changes were made to the VFR engine for use in the Magna, including a different crankshaft, a 5-speed transmission and chain driven cams. Smaller carbs were also utilized. The changes resulted in a stronger mid-range pull, and a very broad band of power. The design of the 3rd-generation Magna remained relatively unchanged over its lifetime. The tank decal

4187-404: The heat from the engine it continues its flow to the radiator. The radiator transfers heat from the coolant to the passing air. Radiators are also used to cool automatic transmission fluids , air conditioner refrigerant , intake air , and sometimes to cool motor oil or power steering fluid . A radiator is typically mounted in a position where it receives airflow from the forward movement of

4266-407: The heater and set it to high if the engine is overheating , to assist the main radiator. The engine temperature on modern cars is primarily controlled by a wax-pellet type of thermostat , a valve that opens once the engine has reached its optimum operating temperature . When the engine is cold, the thermostat is closed except for a small bypass flow so that the thermostat experiences changes to

4345-422: The incoming air charge—not to cool the engine. Aircraft with liquid-cooled piston engines (usually inline engines rather than radial) also require radiators. As airspeed is higher than for cars, these are efficiently cooled in flight, and so do not require large areas or cooling fans. Many high-performance aircraft however suffer extreme overheating problems when idling on the ground - a mere seven minutes for

4424-412: The level of the carburetor banks and has a low-fuel sensor incorporated into the body. Owing to the low seat height (much lower than in a standard street bike) and cruiser styling of the bike, the main tank is relatively small. Because the bottom end of the sub-tank is so low, all bikes in this family have a fuel pump to get the fuel up into the carburetors. In practice, the fuel pump adds more complexity to

4503-622: The linkage based single shock that was on the Sabre and Interceptor. The V-65 Magna and other large-displacement Hondas were assembled in the Marysville Motorcycle Plant in Ohio for US delivery and in Japan for other markets. In 2008, Honda announced plans to close the plant, their oldest in North America, in 2009, which had been still making Gold Wings and VTX cruisers . The 1982 V45 Magna has

4582-616: The liquid form. Additional gains may be had by allowing the steam to become superheated. Such systems, known as evaporative coolers , were the topic of considerable research in the 1930s. Consider two cooling systems that are otherwise similar, operating at an ambient air temperature of 20 °C. An all-liquid design might operate between 30 °C and 90 °C, offering 60 °C of temperature difference to carry away heat. An evaporative cooling system might operate between 80 °C and 110 °C. At first glance this appears to be much less temperature difference, but this analysis overlooks

4661-454: The market for powerful cruisers by lifting the engine from the VFR750 and slotting it in a cruiser chassis. The engine itself was beautified by the addition of chrome and some extra fins, and by the chromed 4 into 4 exhaust. The seat was kept very low, at 28 inches, with the passenger seat being detachable. The all new frame was complemented by 41 mm forks, dual shocks, and a single disc on

4740-433: The need to handle gas in the flow greatly complicates design. For a water cooled system, this means that the maximum amount of heat transfer is limited by the specific heat capacity of water and the difference in temperature between ambient and 100 °C. This provides more effective cooling in the winter, or at higher altitudes where the temperatures are low. Another effect that is especially important in aircraft cooling

4819-458: The production motorcycle with the fastest tested speed was the 151–158 miles per hour (243–254 km/h) Kawasaki GPZ900R . The Honda VF500 is one of Honda's second generation V4 motorcycle engines produced in a series of motorcycles designated with VF and VFR initials. For 1984–1986, Honda produced the 498 cc, V4 DOHC VF500 for the VF500C Magna V30 (1984/85) and its sister bike,

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4898-450: The radiator at all times. Vehicles whose design required the installation of a large radiator to cope with heavy work at high temperatures, such as commercial vehicles and tractors would often run cool in cold weather under light loads, even with the presence of a thermostat , as the large radiator and fixed fan caused a rapid and significant drop in coolant temperature as soon as the thermostat opened. This problem can be solved by fitting

4977-431: The radiator to prevent the temperature from rising higher. Once at optimum temperature, the thermostat controls the flow of engine coolant to the radiator so that the engine continues to operate at optimum temperature. Under peak load conditions, such as driving slowly up a steep hill whilst heavily laden on a hot day, the thermostat will be approaching fully open because the engine will be producing near maximum power while

5056-521: The rim's lip but were the same size. Honda only made the VF700 for 1984, 1985, 1986, and 1987, then back to the VF750 after that. In the first part of 1984, some Magnas were still VF750s though 1984 750s were more common with Interceptors (VF750F). Models from 1982 to 1984 were unique in their use of a larger primary fuel tank and smaller sub-tank. The sub-tank is located directly behind the left side cover, well below

5135-403: The same term [REDACTED] This disambiguation page lists articles associated with the title V42 . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=V42&oldid=1161439496 " Category : Disambiguation pages Hidden categories: Short description

5214-429: The shaft drive is very convenient with virtually no maintenance required (and no oil getting slung around), it also robbed some power from where it was more evidently lacking on in town or lower speed riding. It also had features like twin horns, hydraulic clutch, and an engine temperature gauge. A coil sprung, oil bath, air preload front fork with anti-dive valving was an improvement, although the Magna did not benefit from

5293-433: The shape head bolts had to be replaced with head studs so 1986 models have chrome acorn nuts where zinc-plated headbolts once were. These were the only changes from 1985 to 1986, the following years of Magnas would be quite different. The large displacement 1,098 cc (67.0 cu in) V65 Magna attracted attention as Honda's entry in the 1/4 mile wars between manufacturers at the time, causing Suzuki to respond with

5372-505: The steam back below the boiling point. As steam is much less dense than water, a correspondingly larger surface area is needed to provide enough airflow to cool the steam back down. The Rolls-Royce Goshawk design of 1933 used conventional radiator-like condensers and this design proved to be a serious problem for drag. In Germany, the Günter brothers developed an alternative design combining evaporative cooling and surface radiators spread all over

5451-401: The support crew that usually accompanies riders in adventures depicted in such films as Long Way Round . The Honda Magna of years 1982–1988 incorporated a number of unique features into a cruiser market dominated by V-twin engines. The V4 engine configuration provided a balance between torque for good acceleration and high horsepower. The 90-degree layout produced less primary vibration, and

5530-527: The vehicle, such as behind a front grill. Where engines are mid- or rear-mounted, it is common to mount the radiator behind a front grill to achieve sufficient airflow, even though this requires long coolant pipes. Alternatively, the radiator may draw air from the flow over the top of the vehicle or from a side-mounted grill. For long vehicles, such as buses, side airflow is most common for engine and transmission cooling and top airflow most common for air conditioner cooling. Automobile radiators are constructed of

5609-407: The velocity of airflow across the radiator is low. (Being a heat exchanger, the velocity of air flow across the radiator has a major effect on its ability to dissipate heat.) Conversely, when cruising fast downhill on a motorway on a cold night on a light throttle, the thermostat will be nearly closed because the engine is producing little power, and the radiator is able to dissipate much more heat than

5688-520: The version in the Interceptor VF500F sport bike, and while Honda sold the VF500C Magna in the United States, it advertised it as the "most powerful midsize custom in the world". This standard motorcycle was introduced as a balanced bike that was just as enjoyable yet easier to ride in town than its larger Magna siblings, with good power and a broad torque band. Thanks to its V4 design, power in

5767-447: The water is hotter than the ambient air, its higher thermal conductivity offers comparable cooling (within limits) from a less complex and thus cheaper and more reliable oil cooler. Less commonly, power steering fluid, brake fluid, and other hydraulic fluids may be cooled by an auxiliary radiator on a vehicle. Turbo charged or supercharged engines may have an intercooler , which is an air-to-air or air-to-water radiator used to cool

5846-472: Was also the first to have the lower seat height of a mere 27.8 inches (710 mm), more than 4 inches (100 mm) lower than its predecessor. The production numbers of 1987 and 1988 Magnas have never been released by Honda. In 1987 the Super Magna came in red or blue - about 16,000 total were built In 1988 the Super Magna came in red or black - about 3500 total were built The Magna 750 was launched in 1993 as an early release 1994 model. Honda sought to capture

5925-550: Was available in either Candy Wave Blue or Candy Bourgogne Red (1988 dropped Blue in favor of Black). For 1987, the fake airbox covers were wrinkle black with a "Magna" emblem. The fake airbox emblem changes to "V45" for the 1988 model. The 1987 Super Magna had a silver, grey and black Honda "wing" tank decal on the Candy Wave Blue tanks, and a silver, black, and red decal on the Candy Bourgogne Red tanks. The 1988 model had

6004-666: Was changed in 1995, and a miniature fairing was available on 1995 and 1996 Deluxe models. 2004 saw the demise of the Magna, along with other Honda stablemates such as the V-Twin Shadow ACE and Shadow Spirit, as well as the 6-cylinder Valkyrie . Radiator (engine cooling) Radiators are heat exchangers used for cooling internal combustion engines , mainly in automobiles but also in piston-engined aircraft , railway locomotives , motorcycles , stationary generating plants or any similar use of such an engine. Internal combustion engines are often cooled by circulating

6083-408: Was fairly common with the earlier 750 models. The headlight changed from round chrome to a rectangular chrome housing. The seats were changed to a wider & lower 2 piece design in an attempt to improve rider comfort. The rear shocks also changed to eliminate the extra fluid reservoir. The wheels were different as well now being an "open" 5-spoke wheel like Honda's VT500s but with chrome the way around

6162-462: Was soon to be negated by the widespread availability of ethylene glycol based coolants, which had a lower specific heat , but a much higher boiling point than water. An aircraft radiator contained in a duct heats the air passing through, causing the air to expand and gain velocity. This is called the Meredith effect , and high-performance piston aircraft with well-designed low-drag radiators (notably

6241-417: Was usually plain water. Antifreeze was used solely to control freezing, and this was often only done in cold weather. If plain water is left to freeze in the block of an engine the water can expand as it freezes. This effect can cause severe internal engine damage due to the expanding of the ice. Development in high-performance aircraft engines required improved coolants with higher boiling points, leading to

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