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Old 09-16-2009, 10:29 AM   #46
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non-electric ceiling fan???


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Originally Posted by garyofcourse View Post
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.

Hi Gary,

Since neither of us has PM privileges yet I've set up an e-mail account to facilitate communication. Please send me an e-mail to offgridfan@gmail.com when you are able.

I am very interested in talking with you about your project.

Thank you.

bobrok

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Old 09-16-2009, 10:55 AM   #47
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non-electric ceiling fan???


eredluin (Poster #46)That train of thought could lead us back Two and a Half Centuries to the era of the Butcher, the Baker and the Candlestick maker. In fact we can find substitutes for most technological advances. The point is that we must swim with the tide. Go along with the technology of our times. If we live in an area where there are frequent Electrical outages, then we must find contemporary solutions, like Backup Generators or Large Storage Batteries! (Now more than ever)Don't Drink and Drive!!!
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Old 09-18-2009, 10:20 PM   #48
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Hey guys, the professor is very big on keeping things secret. Part of this is because he wants us to learn how projects need to be done in secrecy so that later there is no trouble when dealing with issues like patents. Some bad news for now:
1. Hes asked that the websites be password protected so that non authorized people (basically people other than him and the team) are not able to access it. Apparently if you openly disclose information on the internet it might not be accepted by the patent office later since the information is already common knowledge.

2. He's informed us that pretty much everything we make technically belongs to GeorgiaTech. If GT decides to stake claim to the product, at the end of the semester we might have to sign some sort of disclosure which basically gives GT full right to do what it wants and it becomes their intellectual property.

The good news is GT will probably not be interested in something like an off the grid fan. The research done here is usually on very high tech stuff. Also never in the history of the course has GT actually stepped in and claimed a product. These student designs are basically too primitive for their interest. So this might not be an issue.

The other issue as of now is getting the teammates to agree to disclose this stuff. I'm not sure if any of them actually want to patent this stuff. But if they do I will be required to keep it under wraps. Quite frankly our plan was to develop the fan so it can be used in developing countries or 3rd world countries where people do not have constant electricity supply. So I dont think we want to patent it. If we do go ahead and patent it, I dont think any of us could care to protect the patent, we'll just have a patent on our resume and be done with it.

Bottom line tho is I need to wait till the end of the course to see what I am allowed to do. Even if I cant post pics or detailed instructions I'll give you guys hints about what you should do.
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Old 09-18-2009, 10:26 PM   #49
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Originally Posted by bobrok View Post
Hi Gary,

Since neither of us has PM privileges yet I've set up an e-mail account to facilitate communication. Please send me an e-mail to offgridfan@gmail.com when you are able.

I am very interested in talking with you about your project.

Thank you.

bobrok
Bobrok, I've emailed you. But like I mentioned in the post a few mins ago I cant really disclose much at this point.
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Old 09-18-2009, 10:36 PM   #50
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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.
Yes fan speed will be slow. Already picked a speed, now doing math to find energy required.

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Originally Posted by eredluin View Post

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.
We are using an outdated fan that was lying in the garage. Easiest this way, don't have to waste time building a hub and fan blades, not to mention dealing with the bearings inside it.

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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.
It won't be difficult to build at all. Also cost will be low, I think we'll make it within $100.

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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).
Guess I am a geek
Im actually an Aerospace engineer. Mechanical eng is my second degree. But I dont know how to fly. We have a flying club on campus tho, might learn if I have time/money next yr.
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Old 09-19-2009, 07:58 AM   #51
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non-electric ceiling fan???


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eredluin (Poster #46)That train of thought could lead us back Two and a Half Centuries to the era of the Butcher, the Baker and the Candlestick maker. In fact we can find substitutes for most technological advances. The point is that we must swim with the tide. Go along with the technology of our times. If we live in an area where there are frequent Electrical outages, then we must find contemporary solutions, like Backup Generators or Large Storage Batteries
Actually I think the future should be solar, water & wind power
We can't rely on fossil fuels forever
And with elecric rates & everthing else going up I'd like to cut down on what I pay
We use candles & oil lamps for short outages
Of course we have only had 2 outahes in 6 years

If I ever get some spare time I'd like to take apart a fan & try to make a manual fan
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Old 09-20-2009, 08:32 PM   #52
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non-electric ceiling fan???


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Actually I think the future should be solar, water & wind power
We can't rely on fossil fuels forever
And with elecric rates & everthing else going up I'd like to cut down on what I pay
We use candles & oil lamps for short outages
Of course we have only had 2 outahes in 6 years

If I ever get some spare time I'd like to take apart a fan & try to make a manual fan
When I stated that we should seek contemporary solutions to today's energy problems, I didn't mean to say that I am not fascinated by the life of 250 Years ago. As a matter of fact I am. But to be practical we can't live today's fast paced life with the technology of yesteryear. As a form of relaxation it would be wonderful to step back and live (for a while) in a house (in a valley) "Driven" by Wind and water power. For lighting we can use "Lux" Kerosene lamps. There's nothing more wonderful than splitting logs for cooking and heating. All of that is good for a vacation. But then we have to get back to real life. (Now more than ever)Don't Drink and Drive!!!
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Old 09-22-2009, 01:44 PM   #53
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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
I have been interested in this type of fan for a long time. I live on Dominica and want to get off grid. I read this post a while back and did some sketches .....don't have engineering background but see if you think this idea works. At least to get started.

The weights are just like on the movie picture and drives the pulleys. Each pulley would be double and simply rotate on an individual shaft per pully. The size of the double pulley would be 2 or 3 inches in diameter and 10 or 12 respectively. So that you would be basically multiplying the driven feet of belt by about 10 on each pulley. Drive each pulley from the 10" to the next pulleys 2" and therefore get about (don't murder me with the math guys)...just rudimentary measures would yeild about multiples of 10.

The first would travel at 10r's........2 would travel at 20r's....3 would travel at 200r's and so on until the forth one would be on the fan blade.

Naive as I am I was just going to add weight and adjust the blade size and pitch to achieve about a 200 RPM fan speed and hopefully a 4 hour run time in an 8' fall of the weights.

I'm I over simplifying? I was looking at the fan resistance to be the govenor for the weights. Looks really feasable to me. Can't find parts on this island to try it. I think third world countrys could really benifit from this.

I would start with two 1/4" thick aluminum plates about 2' square and stack them and drill the holes in them to receive the axels for the pulleys. Very light weight pressed steel type or even aluminum cast. They just need an axle with a shoulder on each end like a shoulder screw so you could secure them in place and be self adjusted and then install the pulleys that have their bearing that fit the axle. Flip each double pulley so you are driving 10'" to 2" each time.....

Thanks for listening to my self admitted naive design.
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Old 09-22-2009, 01:49 PM   #54
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I think if the design started with a driver like a garage door rotational spring then the more you load it the faster it would go. Fast to start and slow to finish if it didn't fly apart.

I say weights are the same throughout the travel and you only have to adjust the fan pitch and/or size for the governing of the speed.
Thanks,
Islandmon
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Old 09-28-2009, 12:13 PM   #55
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Here's how I'd do it with what I have laying around right now.
Garage door spring to store power.
bike parts up the wazoo for gears and chains.
use crank or weights to turn gears.
use chains and gears instead of belts and pulleys, this will allow changing speed of fan as easily as shifting the gears.
The slower it rotates, the longer it lasts.
Sorry it took me so long to think up something plausible, I'm still building out here in BFE, and my magic toys keep me pretty busy too...

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Old 09-28-2009, 03:06 PM   #56
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Here's how I'd do it with what I have laying around right now.
Garage door spring to store power.
bike parts up the wazoo for gears and chains.
use crank or weights to turn gears.
use chains and gears instead of belts and pulleys, this will allow changing speed of fan as easily as shifting the gears.
The slower it rotates, the longer it lasts.
Sorry it took me so long to think up something plausible, I'm still building out here in BFE, and my magic toys keep me pretty busy too...

DM
I love the bicycle chain drive. Thought of using a ten speed setup originally myself but the problem on this island is everything is used up and then trashed. Nothing useable left like in the States. I have located an car junkyard and have hopes for that area in the future. I'm really interested in what you folks thing about the idea I had of doubling the pullies......or chains.....same principle. Just don't know how to overcome the spead change of the load on the garage door spring. Seems like you'd be changing gears all the time. haaa!!! Hell that might be just the ticket to give you something to do. Haaaaa!!!
Have a great day guys.....I love people who think and say "Can do"! You are a great bunch of guys!
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Old 12-14-2009, 01:39 PM   #57
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There is a man in Duluth, Minnesota- He is a commercial Fisherman. he builds furniture, boats and is a very good Machinists. He Builds on Order Non-Electric Ceiling Fans that are spring (wind-up) powered and very long lasting. They have a long arm that goes into a square socket and you wind the spring up every hour.

Howards Fish House this is where you will find him.

Last edited by Capt. Mark; 12-14-2009 at 01:59 PM.
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Old 12-14-2009, 06:49 PM   #58
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There is a man in Duluth, Minnesota- He is a commercial Fisherman. he builds furniture, boats and is a very good Machinists. He Builds on Order Non-Electric Ceiling Fans that are spring (wind-up) powered and very long lasting. They have a long arm that goes into a square socket and you wind the spring up every hour.

Howards Fish House this is where you will find him.
Hi Capt. Mark,

Thank you for the post. Would you be able to provide me a little more information about who to contact and how?
I don't think it prudent to post names, etc. here but I would greatly appreciate it if you would e-mail me at offgridfan@gmail.com to provide as much info as you think wise. I am the OP on this thread.

P.S. Are you the "last fisherman standing"?

bobrok
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Old 12-14-2009, 07:02 PM   #59
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non-electric ceiling fan???


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Originally Posted by Capt. Mark View Post
There is a man in Duluth, Minnesota- He is a commercial Fisherman. he builds furniture, boats and is a very good Machinists. He Builds on Order Non-Electric Ceiling Fans that are spring (wind-up) powered and very long lasting. They have a long arm that goes into a square socket and you wind the spring up every hour.

Howards Fish House this is where you will find him.
It's wonderful. But I'm too lazy to walk over every hour on the hour to wind up a spring. Plus. every spring and summer I have a ceiling fan working, in addition to the air conditioner in my bedroom. so when someone comes up with a spring loaded fan or any other machine that lasts about 10/12 hours+, I'll be ready to put in my order.
p.s.: Maybe we'll invent an electronic spring winder with sensors that will also be connected to the internet, through X10 or other Home automation technology!

Last edited by spark plug; 12-14-2009 at 07:04 PM. Reason: clarification of posting
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Old 02-15-2010, 07:23 PM   #60
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Hey there is a guy from the Netherlands who built a weight driven fan that looks really cool. His name is Steven Kessel and he called his fan the ventilator. Supposedly you have to crank the weights up for a few minutes but it will keep the fan moving for an hour or more. If you Google his name and ventilator you can find some pictures and preliminary sketches of his design. I would love to build one of these. Good Luck


Last edited by LittleJohn; 02-15-2010 at 07:38 PM.
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