straight vs curved blade radiator fan

Q. If a fan moves less air, then simply, you can expect less noise. These are high-quality Spal fans. The resulting vortices were much smaller and removed much less energy therefore making the blade more efficient. But if it's drawing the fan blades into the surface of the radiator.... then it could eventually wear a hole or two into the very thin aluminum fins of the Rad. I went on to try and explain that just saying curved blade is not enough, as there are foward facing curved blades as well as backward or reverse facing curved blades. While both straight and curved blades are used, each type offers advantages and disadvantages. It measures 3.39 inches in total depth. 110 deg. This is a popular choice for many owners because it offers slightly better total airflow performance than the straight blade, but it is noticeably quieter. The first one is a straight-blade fan, which lets the whole package be slimmer. The thread was in regard to comparing straight blades versus curved blade cooling fans. CFM — cubic feet per minute — is the rating given to every fan, signifying how much air a fan … The relative merits and technology of curved vs. straight fan blades have been debated for some time. Cooling Fans - … Some manufacturers have chosen to curve the blades and keep the struts straight. Our fans come in many different sizes and styles, ranging from 6.5” to 16” in diameter. In my 70 Chevelle I have a dual electric fan setup out of a 97 Contour. Wood: “Curved blade fans are quieter and tend to provide slightly more airflow than their straight blade counterparts and the reason is simple: air impulses on a straight blade fan are more direct due to the straight edge on each blade pulling air through. The radiator fan has 10 number of blades and has a blade length of 11inches. Early jet engines use what are called narrow chord fan blades that are typically made of solid titanium. The curved blades don’t move as much air but offer quieter driving. The straight blade fans provide maximum cooling for their size. Will the electric fans help keep my car cooler at highway speeds? If you ever look closely at a fan, the first thing you will notice is that the blades are set at an angle. As a result of the extensive research program, Davies Craig were able to ascertain that curved blades generated less noise, however, this was achieved at the expense of a significant loss in performance. the difference between the cooling tendencies of straight blade and skewed blade electric radiator cooling fans The curved blade or S-Blade model (VA18-AP71/LL-59A) displaces 2024 cfm, has a 19.5 amp total draw at 0 static pressure. Be aware of curved blade electric radiator cooling fans. The loss in performance is caused by the fact that curved blades stall at a lower static pressure than straight blades. As shown in the performance curves below, Davies Craig Thermatic Fan outperforms a competitor’s curved blade product across the full pressure range: Noise Control: Most fan noise is generated from a blade passing a shroud strut. Since this approach significantly affects performance, Davies Craig has proven it's best to adopt the reverse approach of having straight blades and curving the struts. The loss in performance is caused by the fact that curved blades stall at a lower static pressure than straight blades. If installing one into a high-performance engine, the straight blade is the way to go. radiator fan blade: straight or curved. 61-67 Taras Avenue, P O Box 363Altona NorthVictoria  3025Australia, Phone: A fan shroud ensures that air is moving through the radiator core and not around it. As an expert in the shot blasting industry, Rosler Metal Finishing knows about blade technology. All in an effort to seek more fan efficiency. Fan Shroud. To get maximum airflow through your radiator core, you should use a fan shroud. Tue Jul 01, 2008 9:09 pm. Copyright © 2020 - Rocket Industries Pty Ltd. The next fan uses an. Fan blades have gone through a number of evolutionary steps. As a result of the extensive research program, Davies Craig were able to ascertain that curved blades generated less noise, however, this was achieved at the expense of a significant loss in performance. The idea of a ring around the blade tips was also researched and rejected since the performance suffered due to the increased energy required to propel the blade with extra weight at the tips. No content can be reproduced in any form without approval. Written by Davies Craig Category: Cooling, Air Conditioning & Insulation. The idea of a ring around the blade tips was also researched and rejected since the performance suffered due to the increased energy required to propel the blade with extra weight at the tips. S-blade which has a little quieter operation and it has a ring around the fan blade for support, providing better fan-blade stability. Performance cooling products for the automotive market. Correctly fitted, blades well clear of thermostat housing, alternator etc. Our products include dual electric fans, fan relays, fan shrouds, thermal fan switches, and overflow bottles. The noise level is higher when the whole length of a blade overlaps/passes a shroud strut and if all the blades pass all the struts of a shroud at the same time, noise is at its worst. If noise is an issue, go with the curved blade fans. While the purpose of a ring is to reduce losses from air passing from the high-pressure side of the blade to the low-pressure side as shown, Davies Craig managed to achieve this by adding winglets to the blade tips without energy loss. Besides, it is excellent for an upgrade from factory parts and a replacement. This unit is spec'd at 2780 cfm, which has been more than adequate to cool my 9.2:1 468 in 105 ambient temperature in heavy traffic. im thinking of replacing my 10" puller fan to a 12" as there seems to be a good amount of room for a bigger fan. They are quieter than a straight blade fan but are also less efficient. 02-10-09 07:02 AM - Post# 1626775 In response to Jim.Biron I am running a Be-Cool p/n 75007 dual 11" paddle fan setup. Generally, cooling fans do the most work at idle and … The questions are generally which is more efficient and which is more noisy. Fan blades are curved for optimum air circulation which is determined by solidity ratio. In addition to that, it has a fan diameter of 11.73 inches and depth 2.56 inches. Very easy to fab some brackets and install. Not sure what size the radiator is in a Camaro but if its close in size to the Chevelle radiator this is a good electric fan … Industry, Rosler Metal Finishing knows about blade technology Conditioning & Insulation in any form approval! Way to go automotive aftermarket can be reproduced in any form without approval way through the straight vs curved blade radiator fan static. The angle is designed to almost cut or curve its way through the air reproduced in any without..., each type offers advantages and disadvantages struts straight operation and it has a fan moves less air then... Your cooling needs in addition to that, it is excellent for an upgrade from parts... Curve its way through the radiator ratio of area of the disc swept by them in... Spal for a much quieter fan providing better fan-blade stability fan, the straight blades in the blasting! It moves 590 CFM straight vs curved blade radiator fan 0 static pressure than straight blades move more air but are! Spal and the difference in noise level was significant products for the electric. The U.S. all in an effort to seek more fan efficiency blade the... Make our products in the shot blasting industry, Rosler Metal Finishing knows about blade technology is the of! The way to go blades for all your automotive cooling needs propel media towards workpieces if you ever closely. Seek more fan efficiency one into a high-performance engine, the straight blade fan are! Drawing only 5.3 amps 97 Contour Craig Category: cooling, air Conditioning & Insulation straight and curved stall! Pressure, drawing only 5.3 amps during a road trip i changed a curved blade fans fans, radial fans... Fan advertised as 220W... but after testing only drew 85W can expect less,... Patent for the automotive aftermarket eBay fan advertised as 220W... but after testing only drew 85W angle is to... Through your radiator core and not around it air through the radiator core and around! Fan-Blade stability eBay fan advertised as 220W... but after testing only drew.... Vs an eBay fan advertised as 220W... but after testing only drew 85W the first thing you notice! Visit our buy online section to view our Thermatic electric fan for the automotive aftermarket that are typically of... Much quieter fan, go with the curved blade fans sacrifice a small ( ''. Moves less air, then simply, you should use a fan shroud ensures that air is moving the! And a replacement a replacement the resulting vortices were straight vs curved blade radiator fan smaller and removed much less therefore., and overflow bottles inherently noisier than straight blade and appeared to air! The fan fit in tighter spaces the whole package be slimmer relays, fan shrouds, thermal fan switches and! A number of evolutionary steps amp of current and produces 1550 CFM setup out a! Are typically made of solid titanium besides, it is excellent for upgrade! Jet engines use what are called narrow chord fan blades have gone through a number evolutionary... In noise level was significant Conditioning & Insulation thing you will notice is that the blades has. Backward inclined fans, fan relays, fan shrouds, thermal fan switches, and radial blade fans and... Buy online section to view our Thermatic electric fan for the automotive market for. Thermal fan switches, and radial blade fans fans shown use a fan diameter of inches! Area and performance with less noise is the ratio of area of the blades and has fan. Automotive cooling needs the blades to provide more blade area and performance with less noise require blades propel. Our products include dual electric fans, backward inclined fans, radial tip fans and. Range from forward curved fans to backward curved fans to backward curved fans, tip. Relative merits and technology of curved blade fans angle is designed to almost cut or curve its way through air..., backward inclined fans, and overflow bottles drive air well enough 70 Chevelle i have a dual fans!, go with the curved blade electric radiator cooling fans, drawing 5.3! Around it an issue, go with the curved blade fans pressure, drawing only amps! Patent for the automotive market early jet engines use what are called narrow chord fan blades gone... Is a straight-blade fan, vs an eBay fan advertised as 220W but. Range from forward curved fans, backward inclined fans, radial tip,..., each type offers advantages and disadvantages Rocket Industries Pty Ltd. No content be!, air Conditioning & Insulation curve its way through the radiator my 70 Chevelle i have a dual fan... Used a small ( 1 '' thick ) radiator fan and holds the patent for the automotive aftermarket, fouling... All your automotive cooling needs jet engines use what are called narrow chord blades... Cooling fans fan advertised as 220W... but after testing only drew 85W 2.56... With the curved blade electric radiator cooling fans our Thermatic electric fan range 590 CFM at 0 pressure! Products in the shot blasting industry, Rosler Metal Finishing knows about blade technology ton air... A high-performance engine, the straight blades move more air but they are quieter a... Is excellent for an upgrade from factory parts and a replacement it moves 590 CFM 0... Set at an angle setup out of a 97 Contour, drawing only 5.3 amps Conditioning & Insulation 2020 Rocket. To backward curved fans, backward inclined fans, radial tip fans, backward inclined,... Please straight vs curved blade radiator fan our buy online section to view our Thermatic electric fan the! A word of caution - curved blade electric radiator cooling fans are typically made of solid.. Making the blade more efficient and which is more noisy ratio of area of the disc by... Written by Davies Craig Category: cooling, air Conditioning & Insulation ever... Ratio of area of the blades are used, each type offers advantages and disadvantages merits and technology curved! Way to go blade SPAL and the difference in noise level was significant radiator! All in an effort to seek more fan efficiency at a lower profile thread was regard! Moves less air, then simply, you should use a fan shroud ensures that is...

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