Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Results 1 to 5 of 5

Thread: Parabolic solar cooker - GIF

  1. #1
    Content Editor
    Supporting Member
    Altair's Avatar
    Join Date
    Aug 2013
    Posts
    11,723
    Thanks
    1,353
    Thanked 29,236 Times in 9,716 Posts

    186 More Best Homemade Tools eBook

  2. The Following 7 Users Say Thank You to Altair For This Useful Post:

    baja (Sep 17, 2022), Inner (Sep 16, 2022), johncg (Sep 18, 2022), mwmkravchenko (Sep 16, 2022), nova_robotics (Sep 16, 2022), Ralphxyz (Sep 16, 2022), Scotsman Hosie (Oct 1, 2022)

  3. #2
    Supporting Member mwmkravchenko's Avatar
    Join Date
    Nov 2017
    Location
    Perth Ontario Canada
    Posts
    1,001
    Thanks
    5,080
    Thanked 370 Times in 262 Posts
    This should get a lot more use than they currently do. Fuel free, that is the reason why they do not get the attention that they deserve. Even in overcast weather you can warm stuff up at midday.

    2000 Tool Plans

  4. The Following 3 Users Say Thank You to mwmkravchenko For This Useful Post:

    nova_robotics (Sep 16, 2022), rdarrylb (Sep 17, 2022), Scotsman Hosie (Oct 1, 2022)

  5. #3
    Supporting Member
    Join Date
    Sep 2018
    Posts
    2,117
    Thanks
    9,968
    Thanked 1,132 Times in 608 Posts

    nova_robotics's Tools
    A few years ago I welded up a frame and put a Fresnel lens in it. I bought that lens online, but you can get them for cheap/free out of old projection TVs which everyone seems to be throwing out these days. This picture is my girlfriend using the Fresnel lens to melt sand into glass. It would melt the sand pretty quick. Very impressive stuff.

    Parabolic solar cooker - GIF-fresnel.jpg

  6. The Following 4 Users Say Thank You to nova_robotics For This Useful Post:

    Altair (Sep 17, 2022), mwmkravchenko (Sep 17, 2022), rdarrylb (Sep 17, 2022), Scotsman Hosie (Oct 1, 2022)

  7. #4
    Supporting Member hemmjo's Avatar
    Join Date
    Feb 2017
    Posts
    2,542
    Thanks
    224
    Thanked 1,446 Times in 820 Posts

    hemmjo's Tools
    On a sunny day, if he lets it boil dry he could possibly destroy that pot with that parabolic dish.

    Back in the 1980's as part of an energy unit I had a class build a 4' diameter parabolic reflector from fiberglass and epoxy resin. The form was made from plaster using the jiggering method to create the parabolic shape. It was in 8 sections, bolted together to create the full dish.

    The sections were covered with strips of chrome mylar we got from a parent that had a connection with Dupont. We were only able to try it one time as the intensity of the light at the was so intense to be dangerous to the eyes. It was as bright as arc welding. Holding a common 2 x 4 at the focal point would begin to smoke instantly and burst into flames in just a couple of seconds.

    I wish I had pictures.
    Last edited by hemmjo; Sep 18, 2022 at 02:01 AM.

  8. The Following 2 Users Say Thank You to hemmjo For This Useful Post:

    mwmkravchenko (Sep 19, 2022), Scotsman Hosie (Oct 1, 2022)

  9. #5

    Join Date
    Feb 2019
    Posts
    151
    Thanks
    62
    Thanked 98 Times in 54 Posts
    Remember the Radio Shack solar cigarette lighters?



    Parabolic solar cooker - GIF-maxresdefault.jpg



    186 More Best Homemade Tools eBook

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •