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Stationary Engines Discussion Forum

Reverse rotating stationary engine!

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Rustyj14

01-05-2005 18:31:23




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Our Volunteer Fire company, of which i"m a member, had the opportunity to purchase a complete electric generating plant, to be used for auxiliary power, in case of need. (We rent out the upper floor for weddings, etc., so emergency power is needed!) Well, one day, the engine, a Ford industrial six cylinder, needed some repairs, so one guy went to the parts store to get some parts. He came back and told the Fire Captain they didn"t have parts for a "reverse rotation engine"! The fire cap"t. asked him why he thought it was reverse rotation, and the man said:"Well, it blows air out the front of the radiator! That tells me that it runs backwards!" And, several others thought the same thing! They never thought about the fan blades having a reverse twist! I guess that was done to keep air from blowing dirt into the generator which was mounted onto the flywheel area! by: rustyj

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Averyman

02-07-2005 20:43:50




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 Re: Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
We run our 2N Ford tractor with the fan pushing rather than pulling. Keeps the operator cooler while mowing the yard on a hot day.



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Tramway Guy

02-06-2005 15:12:37




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 Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
My Oliver 88 Diesel would run in reverse if it was turned backwards after stalling. In fact, almost any engine with a cam-operated primary fuel pump will. And yes, the oil pressure drops to zero. But the original premise of being able to determine the engine rotation by whether the fan pushed or pulled is faulty. Most industrial engines can be ordered with either fan type. Just about the only engines with reverse rotation were marine engines that were used in combination with a regular engine for twin units.

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brianh

01-10-2005 10:49:06




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 Re: Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
Something that I could never understand about these reverse-running (pusher) fans is this: The advantage claimed is that it keeps the dust and chaff from building up on the front of the radiator. So, with a reverse fan, why doesn't it build up on the BACK side of the radiator, where it is harder to get to to clean? Brian



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buickanddeere

01-11-2005 10:55:53




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 Re: Reverse rotating stationary engine! in reply to brianh, 01-10-2005 10:49:06  
The front of the rad more often has wide open access to blow backwards with compressed air or a water hose to clean the dirt out.



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buickanddeere

01-06-2005 20:40:49




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 Re: Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
Fans push better than they pull. Hot air was being forced away from the generator instead of towards it. All kinds of reverse aircraft and boat engines. A two stroke Detroit just needs to be assembled for reverse and a reverse starter used.



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rustyj14

01-09-2005 13:00:26




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 Re: Reverse rotating stationary engine! in reply to buickanddeere, 01-06-2005 20:40:49  
In the same fire company mentioned above, we bought a Ward-LaFrance pumper powered by a 671 Detroit diesel engine. One day, while out driving on a practice run, one of the drivers, who was trying out the new truck, thought he had stalled it at an up-hill stop sign. The truck kind of lurched, but he got it stopped! Now, he stepped on the accelerator pedal, left out the clutch and the truck started going backwards at a better rate of speed than coasting! Being unfamiliar with the new truck, he promptly stood on both the clutch and brake pedals, and the whole load of fire hose suddenly slid out onto the road! That 671 Detroit had started running backwards, unbeknownst to the driver! Fortunately, there wasn't any cars behind the truck, but the guys on the truck spent a half hour, repacking the hose into the hose bed! And got some real razzing upon their arrival back at the fire station! And no, it wasn't me! by: rustyj

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Jerry from MN

01-09-2005 18:27:44




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 Re: Reverse rotating stationary engine! in reply to rustyj14, 01-09-2005 13:00:26  
I would think that when these diesels that are supposed to run foward, do run backwards the oil pump would would be running backwards and before too long you would be in for an engine overhaul.



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buickanddeere

01-10-2005 19:24:32




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 Re: Reverse rotating stationary engine! in reply to Jerry from MN, 01-09-2005 18:27:44  
The two cylinder Deere diesels would also run backwards until a cam change in the late 20 series. How do I know? Gave myself and the 720 a good spray of aircleaner oil, while tractor pulling one time. It took quite a few turns on the cranking engine with the diesel decompressed before the oil pump reprimed. Two stroke gasoline engines run fine in reverse too with a change in timing. More than one motor cycle, snowmobile or model airplane pilot been suprised.

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Jerry from MN

01-06-2005 09:00:43




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 Re: Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
I have a 271 Detroit that the fan blades blow towards the front of the engine. The engine is on an Allis crawler loader. I have another in-line 300 six Ford that the fan blows towards the front of the engine. This engine is off a brush chipper. On another brush chipper a 330 Ford the fan sucked the air in towards the engine.



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Kent of SW MO

01-06-2005 06:14:02




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 Re: Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
I worked on a Kohler Light Plant ( 15 KW ) for a local univercity powered by a Waukashaw? engine which had a fan which blew air from the engine threw the radiator instead of sucking air threw rediator towards the engine. You will also find some industrial equipment like Cat. dozers sometime has a reversed fan.

Kent



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Kent of SW MO

01-06-2005 06:10:56




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 Re: Reverse rotating stationary engine! in reply to Rustyj14, 01-05-2005 18:31:23  
I worked on a Kohler Light Plant ( 15 KW ) for a local univercity powered by a Waukashaw? engine which had a fan which blew air from the engine threw the radiator instead of sucking air threw rediator towards the engine. You will also find some industrial equipment like Cat. dozers sometime has a reversed fan.

Kent



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Jim McCracken

01-06-2005 20:56:27




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 Re: Reverse rotating stationary engine! in reply to Kent of SW MO, 01-06-2005 06:10:56  
I was a supervisor in a pulpmill in the Oregon.
We had a Cat D-10 with a huge blade pushing chips and sawdust.Reversing the fan helped keep the sawdust and other fine material from plugging the raditor and starting fires on the exhaust system.



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woodyy

01-09-2005 17:41:51




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 Re: Reverse rotating stationary engine! in reply to Jim McCracken, 01-06-2005 20:56:27  
had a 89 peterbilt 3406 b 425 hp cat moter run in reverse before was the strangest thing ive seen let the clutch out and all it wanted to da was go backwards evan thoe i had it i a forward gear



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