Fan hurting or helping ???

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318willrun

318willrun

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@273
@AJ/FormS

Mechanical Fan.

It cost "XX" amount of HP to turn @ "XXXX" RPM. However, at what RPM does the fan start to work like a propeller on an airplane and begin pulling the vehicle forward thus helping the vehicle go in a forward motion and offsetting the HP taken to turn the fan??

Thanks :)
 
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:rolleyes:
I ran no fan on my duster after the clutch fan got smoked when i blew a water pump 8 miles from home
took it apart drove home at 115 mph shut it off coast til 80 mph wash rinse repeat didnt start losing oil pressure until 1/4 mile from home no damage run boatloads of spray after.
No fan the chevy guys coudnt believe no fan.
if i got caught in bumper to bumper aka fire works it go hot otherwise never:steering:
 
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I'm going to feel totally let down if I can't get an answer ... the question has some merit ???

:lol:
 
318willrun said:
I'm going to feel totally let down if I can't get an answer ... the question has some merit ???

:lol:
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My best guess the air passing the rad at speed (mph) will be greater then the fan could ever pull, unless you actually mount a functioning prop to the front of your car.
 
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I will get on this with some math when I get home. I am still struggling. Early today I got stuck walking up the down escalator at the mall. Boy am I tired
 
You can picture it as follows:

Put a 22" x 20" radiator in front of the propeller on a 150 hp outboard motor on your 18' boat, then you can see how well it will pull the boat around.


☆☆☆☆☆
 
Not a fan but a paddle to mix mortar. I worked with a guy who watched me, he asked to borrow it. I said yes. He says nope don't need the big drill. I am going to use my small cordless. I said it is not going to have enough torque. He says oh not as a mixer. I am going to try it as a trolling motor on my canoe. Ya had to know Billy
 

A fan as small as used for engine cooling will stall and stop moving air long before it moves a vehicle forward or contributes to forward movement.
 
318willrun said:
@273
@AJ/FormS

Mechanical Fan.

It cost "XX" amount of HP to turn @ "XXXX" RPM. However, at what RPM does the fan start to work like a propeller on an airplane and begin pulling the vehicle forward thus helping the vehicle go in a forward motion and offsetting the HP taken to turn the fan??

Thanks :)
Click to expand...
You could try this as an experiment next time you're at the track. With the car in neutral when the light turns green floor it and see what your mph is at the end of the 1/8th. You should be able to use an online calculator to figure out how much horsepower it took to make that mph. Be sure to video it and put it on your channel and share the link with us. ; )
 
TT5.9mag said:
A fan as small as used for engine cooling will stall and stop moving air long before it moves a vehicle forward or contributes to forward movement.
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I believe the word you are looking for is "cavitation"
 
If you had a measuring device that could measure the amount of forward pull on a stationary car down to an ounce or less, you could probably measure a very slight pull. Newton's third law of motion states that "For every action there is an equal and opposite reaction." So if the fan is pulling air in and blowing it out backwards. there is going to be a measurable force. It will be negligible, but it will be calculable and measurable.
 
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