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shonuf
10-12-2005, 09:51 AM
Hi all, great little (for now only I'm sure!) forum. I started serious searching tonight, best place I've found yet, I see some of you are "dreamers" like me. :) People wanting to make small non-flying replicas, fly, for instance.

Anyways, to my topic. I'd like to build a solar powered plane. I'm new to this, (flying AND solar) and I'm sure I don't yet have all the data that I need to figure out how feasible my project idea is, thus I'm asking here. It is entirely possible that it would be near impossible to make at this time. I'm not entirely new to electronics, I'm definitely not afraid, but I'm sure smaller stuff is difficult to work with. I've done some basic wiring, so I know I could at least connect solar cells to a motor. :)

I keep seeing the solar kits at radio shack, (usually with a fan) then thinking "boy one of those micro planes would sure be a more interesting starter project to play with. At least much more fun in the end!"

I'm not sure what kind of power I'd need to move something like this though: http://www.otherlandtoys.co.uk/product1033/product_info.html?∏=1033 (http://www.otherlandtoys.co.uk/product1033/product_info.html?&prod=1033)
I can't find the specs for the engines of course. Any ideas where to look for that info? I saw a post mentioning 1.6amps for a single motor. Definitely limited by power production with solar. I see solar cell kits that produce 2V, 1400mA, but that's one of the few kits I found, that also look to be scaled right. Those are probably "cheap", I suspect with a bit more money, power production could be increased from the same size cells.

So to keep this from getting longer, are there motors/props out there that I could run with those numbers, (two motors would be my ideal) ignoring the weight issues solar cells would add, and keep something flying? Again, learning is cool, no problem if it "fails", even if the props turn I'd be happy! By the way, money is only an object if I'm looking at more than a $100 investment for a potential model with turning propellors. lol
Without knowing the likelihood of it flying yet, I'm not even going to get into the weight/complexity of remote control. If it can be made to fly, it can be made to steer later.

If this is too specific an idea, or two n00b-ish of me to be posting here, I'd love to discuss with anyone willing to take the time. Otherwise, hopefully I can take full advantage of the obvious knowledge here in "public"! Something like this definitely needs people playing devils advocate, and different/better ideas and approaches, and most of all, experience in the field.

fdix
10-12-2005, 10:58 AM
Interesting idea!
But if you want something small AND solar powered the cost is high beacuse you need small and extremely high performance parts. I don't know the exact prices of solar cells but you are going to be investing 500$ easily for the plane and some more for radio, charger etc.
Some time ago I wanted to build a 1,5m motor glider powered by solar cells but was told to forget the idea unless I wanted to invest a lot of money.

I don't want to discourage you, but if you are interested in flying I would start with a normal foamy. Then you'll get helplessly addicted and not care if your project costs you a huge amount of money :D

rcers
10-12-2005, 03:55 PM
It has been done, AMA magazine Model Aviation featured a plane (glider) that did it.

Someone else did it as well. You will be into the setup far more than $100 bucks however.

I am looking for a link to get you started.....

http://www.rcgroups.com/forums/showthread.php?t=231988&highlight=solar+power+

As you can see the issue is that the cells just can't but out the power that most motors require. But it is sure a fun thought! Ralph is a super good guy, drop him a note and he will respond.

Mike

hiflyer
10-12-2005, 05:40 PM
I have recently become interested in building a solar powered plane as well, and remember several years ago, an article on a glider type plane powered this way. Can anyone out there tell me where to find this article or other info pertaining to this subject? Thanks, hiflyer.

Jeff85
10-13-2005, 10:28 AM
This ones mine: http://www.rcgroups.com/forums/showthread.php?t=394769&page=17&pp=15 post #251

This ones cool too:

http://asl.epfl.ch/aslInternalWeb/ASL/publications/uploadedFiles/FSR05_Sky-Sailor.pdf

The big Boys: http://www.vectorsite.net/twuav12.html

One of the Guys: http://www.modelaircraft.org/museum/bio/Boucher.pdf

24 hour solar flight: http://www.aviationtrivia.homestead.com/AC_SoLong.html

Hope this helps a little, let us know how it turns out.

hiflyer
10-13-2005, 10:53 PM
Jeff85: Thanks for the great links. I couldn't get the Sky Sailor one to come up, though. How do I get more info on the 24 hour solar flight one? Hiflyer1

Jeff85
10-15-2005, 01:32 AM
Jeff85: Thanks for the great links. I couldn't get the Sky Sailor one to come up, though. How do I get more info on the 24 hour solar flight one? Hiflyer1

Here's more: http://www.rcgroups.com/forums/showthread.php?t=378861

http://www.acpropulsion.com/

http://www.acpropulsion.com/ACP_PDFs/ACP_SoLong_Solar_UAV_2005-06-05.pdf

Jeff85
10-19-2005, 08:49 PM
Little guy:
http://www.rcgroups.com/forums/showthread.php?t=88868

watt_the?!
10-19-2005, 11:37 PM
how about a solar supplemented plane then?

one that gives increased flight time?

Tim.

olmod
10-20-2005, 02:12 AM
Scroll down to about halfway for solar cells :)
http://www.73.com/a/0108.shtml