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Old 07-17-2009, 07:17 PM   #31
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non-electric ceiling fan???


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Originally Posted by Shmizer View Post
Hey Bobrok

Go rent the Mosquito Coast with Harrison Ford. They have the exact fan you are looking for in the movie. It uses a gravity weight as a power source. If you pause the image, there is enough detail to reverse engineer it. I am planing to build a replica of this fan for my off grid cabin later this summer.
Hi Shmizer,
Gonna do it! And they say there's nothing worthwhile on the tube...
Thanks for the info.

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Old 09-08-2009, 08:44 PM   #32
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non-electric ceiling fan???


...bump...

FINALLY saw the movie...more to follow
anyone else seen it?
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Old 09-08-2009, 10:05 PM   #33
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non-electric ceiling fan???


Maybe somebody like this could help you out

http://www.hudsonscustommachining.com/
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Old 09-08-2009, 10:16 PM   #34
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non-electric ceiling fan???


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Originally Posted by CNM Design View Post
Last time I saw one of those, it was on an old Tarzan movie. It hung from the ceiling of the hut and some native was pulling on a rope. Do you have any kids?
What you are describing is called a Punka
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Old 09-08-2009, 10:19 PM   #35
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non-electric ceiling fan???


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Originally Posted by bobrok View Post
Hello,
I chose the "green" forum as the best place to post this. If I need to be redirected please acknowledge.
Has anyone ever heard of or seen plans for a mechanical (that is, a non-electrically operated) ceiling fan? I'm looking for something to gently push the heat down from the ceiling when heating my off-grid cabin in the winter and I would love to cobble something together if I just knew how to apply the mechanics of, say, an old fashioned wind up mantle clock to the propulsion of fan blades. I figure I would have to rewind frequently but I am prepared to deal with that part if the other is possible.
Any ideas?
Thanks in advance for replies.
The Old fashioned wind up Mantle Clock does not have the Torque to drive a ceiling fan! Perhaps a Water or Gas turbine-driven fan? Or... an Exercise bike!
(Now more than ever)Don't Drink and Drive!!!
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Old 09-08-2009, 10:25 PM   #36
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non-electric ceiling fan???


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Originally Posted by Shmizer View Post
Hey Bobrok

Go rent the Mosquito Coast with Harrison Ford. They have the exact fan you are looking for in the movie. It uses a gravity weight as a power source. If you pause the image, there is enough detail to reverse engineer it. I am planing to build a replica of this fan for my off grid cabin later this summer.
Just be certain that the weights don't bring down the ceiling fan with them! Home ceiling boxes aren't built as strong as is the (Custom) box on the Movie set! Besides. How' ya gonna keep the fan balanced on the swivel ball??? (Now more than ever)Don't Drink and Drive!!!
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Old 09-10-2009, 05:27 PM   #37
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non-electric ceiling fan???


For those who haven't seen it this is a still from the movie of the fan under discussion. Personally I think it's just a prop and wouldn't work for real, but it is very close in concept to what I'd like to have at my camp.
Any ideas/comments on the fan?
Attached Thumbnails
non-electric ceiling fan???-fan.jpg  

Last edited by bobrok; 09-10-2009 at 05:36 PM. Reason: edited to enhance photo - not much better
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Old 09-13-2009, 03:53 PM   #38
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non-electric ceiling fan???


Hi guys, I am a mechanical engineering student at Georgia Tech. Im in my final semester and we're making an off-the-grid ceiling fan as part of our senior design course.

I was scouring the internet looking for existing ceiling fans because (a) we want to know if such devices exist, and what mechanisms they use, before making one and (b) we need to make sure nothing we create is patented. While searching around I stumbled upon this forum.

The good news for you guys is my team (theres 5 of us) has already commtited to making this fan as part of the course, so one way or another we're gonna have an off the grid ceiling fan ready by last week of November. Will be willing to share this stuff with you guys.

Right now we're still debating on what mechanisms to use, but the 2 we're considering are (1) weights/pulleys and (2) a torque spring mechanism sort of like a garage door. We're working on the math because we gotta make sure the fan runs for a reasonable amount of time between cranks.

I was wondering if you guys have any idea what a "comfortable" fan speed would be? In order to maximize running time we're gonna have to minimize fan speed, so striking a balance here is important.

Anyway feel free to present us with ideas, and I'll keep anyone interested posted on our progress.

Also chances are at the end of the semester when we graduate we're not gonna want to hold on to our prototype so we might just give it to anyone who asks.

Gautam
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Old 09-13-2009, 05:45 PM   #39
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Also chances are at the end of the semester when we graduate we're not gonna want to hold on to our prototype so we might just give it to anyone who asks.

Gautam
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Old 09-14-2009, 09:49 AM   #40
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non-electric ceiling fan???


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Originally Posted by garyofcourse View Post
Hi guys, I am a mechanical engineering student at Georgia Tech. Im in my final semester and we're making an off-the-grid ceiling fan as part of our senior design course.

I was scouring the internet looking for existing ceiling fans because (a) we want to know if such devices exist, and what mechanisms they use, before making one and (b) we need to make sure nothing we create is patented. While searching around I stumbled upon this forum.

The good news for you guys is my team (theres 5 of us) has already commtited to making this fan as part of the course, so one way or another we're gonna have an off the grid ceiling fan ready by last week of November. Will be willing to share this stuff with you guys.

Right now we're still debating on what mechanisms to use, but the 2 we're considering are (1) weights/pulleys and (2) a torque spring mechanism sort of like a garage door. We're working on the math because we gotta make sure the fan runs for a reasonable amount of time between cranks.

I was wondering if you guys have any idea what a "comfortable" fan speed would be? In order to maximize running time we're gonna have to minimize fan speed, so striking a balance here is important.

Anyway feel free to present us with ideas, and I'll keep anyone interested posted on our progress.

Also chances are at the end of the semester when we graduate we're not gonna want to hold on to our prototype so we might just give it to anyone who asks.

Gautam

Hi Gary,

Thanks for coming forward! I'd be happy to outline the specifics of my fan requirements. I may have something of interest for you as well.

Please PM me and we can exchange information.

Thanks,
bobrok
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Old 09-14-2009, 09:58 AM   #41
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non-electric ceiling fan???


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Hi Gary,

Please PM me and we can exchange information.

Thanks,
bobrok
Because he is a new member he may not have PM privledges yet....
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Old 09-14-2009, 10:05 AM   #42
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non-electric ceiling fan???


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Because he is a new member he may not have PM privledges yet....
Mr Chips is right... he'll need 20 posts to pm. however, YOU can send HIM a PM with your email address and he can get back to you that way.

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Old 09-14-2009, 11:03 AM   #43
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non-electric ceiling fan???


Yep I dont see any option to send a PM but feel free to PM me. However since this is a prototype we're gonna have to go with stuff available to us such as using the fan blades of an old electric fan which we pulled out of someones garage and throwing together a rough frame or maybe buying a cheap one. It will look fairly rough and ugly when completed since the purpose of the project is to demonstrate the mechanisms. But I will post photos/schematics of all the parts and a description of the process so it'll be pretty easy to copy. I will be making a website as part of the course but you'll have to wait a month or so for that.
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Old 09-14-2009, 11:36 AM   #44
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Mr Chips is right... he'll need 20 posts to pm. however, YOU can send HIM a PM with your email address and he can get back to you that way.

DM

Didn't realize this. Thanks. I guess that rules me out as well unless I go ahead and post some useless drivel to get my post count up, which I won't do.
I'll be there soon.
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Old 09-16-2009, 12:09 AM   #45
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non-electric ceiling fan???



Hey Gary,
Great idea!! Fan speed..hmm. I'm not an engineer, but I think the regular slow speed on an electric ceiling fan would be fine.
Also, people are always giving away, or selling cheap broken/outdated fans. Wouldn't it be great to be able to use those and build fans for ourselves and friends/ family to save money and not have to depend on the electric company.
If you guys can come up with one that isn't too difficult to build, you'd be doing a LOT of people a favor by sharing the plans.
How will we find your website where you'll post schematics and pics?
I LOVE geeks. (My daughter is one of two female pilots out of 52 students in the Professional Flight Major in college. She and all her friends are geeks, great kids, gotta love em).


Quote:
Originally Posted by garyofcourse View Post
Hi guys, I am a mechanical engineering student at Georgia Tech. Im in my final semester and we're making an off-the-grid ceiling fan as part of our senior design course.

I was scouring the internet looking for existing ceiling fans because (a) we want to know if such devices exist, and what mechanisms they use, before making one and (b) we need to make sure nothing we create is patented. While searching around I stumbled upon this forum.

The good news for you guys is my team (theres 5 of us) has already commtited to making this fan as part of the course, so one way or another we're gonna have an off the grid ceiling fan ready by last week of November. Will be willing to share this stuff with you guys.

Right now we're still debating on what mechanisms to use, but the 2 we're considering are (1) weights/pulleys and (2) a torque spring mechanism sort of like a garage door. We're working on the math because we gotta make sure the fan runs for a reasonable amount of time between cranks.

I was wondering if you guys have any idea what a "comfortable" fan speed would be? In order to maximize running time we're gonna have to minimize fan speed, so striking a balance here is important.

Anyway feel free to present us with ideas, and I'll keep anyone interested posted on our progress.

Also chances are at the end of the semester when we graduate we're not gonna want to hold on to our prototype so we might just give it to anyone who asks.

Gautam

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