Fan hurting or helping ???
- Thread starter 318willrun
- Start date
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If you didn't fall going up, you're good.
MoparLeo
NRA BENEFACTOR LEVEL LIFE MEMBER
Ha Ha !! Thanks for the laugh.
Airplane propeller size is measured in feet.
Won't fit under the hood!
I'm going to feel totally let down if I can't get an answer ... the question has some merit ???
340six
King Of Bling
Just putting it out there.
I have quite a few Ryobi Fans. And battery packs. What if we mount them on roof and trunk. Rig up a central trigger system.
When a boost is needed you hit them like a shot of NOS.
I have quite a few Ryobi Fans. And battery packs. What if we mount them on roof and trunk. Rig up a central trigger system.
When a boost is needed you hit them like a shot of NOS.
Uncle Tony would know.
What diameter is the fan? How many blades does it have? What is the pitch of the blades? Is there a fan shroud? Is the fan properly positioned in the shroud? How wide are the tires? How much air is in them? Are you using synthetic lubricants? Do you have ceramic wheel bearings? What is the car's coefficient of drag? Why did I read this thread?
TT5.9mag
Two atmospheres are better than one
Nope
“cavitation occurs only in liquids when the pressure drops below the vapor pressure of the liquid, causing vapor bubbles to form and then collapse, which creates shockwaves and damage. Fans, which operate in air, may experience related phenomena such as air vortices, flow recirculation, or stall due to impediments, but these are distinct from liquid cavitation. “
Precisely why I called on our sites 2 math gurus!!!
It's beyond my skills
Mostly, air out of the fan from a car with the hood closed just dirties up and disrupts the airflow from under the car, unless the hood is vented in a manner that effectively smooths the airflow over the car. The hood that comes to mind is the vented C3 corvette hood with the huge extractors on each each side of the scoop with the rear of the extractor angle being slightly sharper than the windshield angle in order for the air flow to blend into the turbulent zone ahead of the windshield.
It's beyond my skills
Propellers absolutely suffer this phenomenon, it's referred to as "stall", but it is a void in the atmosphere that has to collapse....just like a mini thunderclap. It resulted in many test pilot deaths trying to set top speed records early on, it's the reason turbine, impeller, and propeller engineering is so critical......it's true the intensity of hydraulic cavitation is much higher & concentrated on smaller areas, but to a guy/gal 4,000 feet above the ground, having Your prop shatter seems just a little more destructive......lol.
Was it Hughes that developed the dual counter-rotating props or somebody else,...? Have to look that back up....
If You look up the Hall Chaparral CanAm cars, where they used 2 large 'cooling' fans that were actually generating a bunch of downforce,...You can get an idea of what You'd need to put on the front of the car to get any kind of meaningful input force on the car. Figuring the filtering thru' the rad, & the disorganized flow aft not actually applying pressure against the stationary ambient atmosphere, I'd say it has almost -0-% impact. You'd have to seal & streamline the nose of the car to & thru' the rad & the entire engine compartment, & have it exit underneath facing rearward, and I'm not sure it would get the car to move from a stop in neutral.
Point Your exhaust tips straight back & You'll probably get as much thrust/pull, with a lot less work,...but if You wanna try it, I'll follow along......
TT5.9mag
Two atmospheres are better than one
I guess i could have been more accurate but the point got across, and in air it’s not called cavitation. The McMurtry speirling took the fan car concept and ran with it, look that car up, it’s incredible. But generating downforce through ducted fans and ground effects is much different than generating forward thrust as you seem to know.If You look up the Hall Chaparral CanAm cars, where they used 2 large 'cooling' fans that were actually generating a bunch of downforce,...You can get an idea of what You'd need to put on the front of the car to get any kind of meaningful input force on the car. Figuring the filtering thru' the rad, & the disorganized flow aft not actually applying pressure against the stationary ambient atmosphere, I'd say it has almost -0-% impact. You'd have to seal & streamline the nose of the car to & thru' the rad & the entire engine compartment, & have it exit underneath facing rearward, and I'm not sure it would get the car to move from a stop in neutral.
Point Your exhaust tips straight back & You'll probably get as much thrust/pull, with a lot less work,...but if You wanna try it, I'll follow along......
Yeah, that's badassery, certainly took Hall & Team's concept & vision to a new level.
JDMopar
Well-Known Member
I'm still figuring this one out...."If a hen and a half can lay an egg and a half in a day and a half, how long will it take a one legged monkey to kick all the seeds out of a dill pickle?" I'll jump on the fan problem if/when I get done.
To answer the title of the thread proper,...hurting...all the way.
Need to know if that dill is kosher, if so, the answer is yes.....I'm still figuring this one out...."If a hen and a half can lay an egg and a half in a day and a half, how long will it take a one legged monkey to kick all the seeds out of a dill pickle?" I'll jump on the fan problem if/when I get done.
Oldiron440
Big blocks rule small blocks drool!
If I’m street driving my Plymouth I like a clutch fan, for the most part very reliable and do an excellent job of cooling. If I’m at the dragstip I use an electric motor to turn the water pump and lightweight fan to cool it down. I’ve seen to many unreliable electric fans installed on street cars, just watch a day or two of drag and drive happenings, the same guy’s are changing their fans daily, to make it a doable thing for me. I think part of the problem is they have the shroud to close to the radiator to allow for air flow but I’m not going to bother with it.
Through testing we found at an average 5000rpm the propulsion from a 16" fan is good for a 10th in the 1/4 at 3000#'s on average
But... you just put it right back at the top !!!
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