http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/ Yesterday's tomorrow, today. Fri, 10 Feb 2012 16:12:29 +0000 hourly 1 http://wordpress.org/?v=3.1.4 http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/comment-page-1/#comment-1071984 bill Mon, 19 Oct 2009 20:42:39 +0000 http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/#comment-1071984 I take back my comments! It does work. I tried two different flashlight reflectors and kindling started burning almost immediately when you have it focused correctly. The flashlight reflectors are much deeper than a parabola. Or maybe it IS a parabola, just a different type. I take back my comments! It does work. I tried two different flashlight reflectors and kindling started burning almost immediately when you have it focused correctly. The flashlight reflectors are much deeper than a parabola. Or maybe it IS a parabola, just a different type.

]]> http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/comment-page-1/#comment-1071976 bill Mon, 19 Oct 2009 06:59:42 +0000 http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/#comment-1071976 I don't see how the guy in the 1954 pic could possibly light a cig the way he's holding it. Any parabolic concentrator's focal point is out from the dish, not down in it. I don't think a flash reflector or a flashlight reflector is anywhere near a true parabola. They are usually a lot deeper. There's a video of the Radio Shack lighter on Youtube. Just google it and it comes right up. I don’t see how the guy in the 1954 pic could possibly light a cig the way he’s holding it. Any parabolic concentrator’s focal point is out from the dish, not down in it. I don’t think a flash reflector or a flashlight reflector is anywhere near a true parabola. They are usually a lot deeper. There’s a video of the Radio Shack lighter on Youtube. Just google it and it comes right up.

]]> http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/comment-page-1/#comment-857698 khaled Mon, 03 Dec 2007 11:47:22 +0000 http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/#comment-857698 The Lunar Solar Power Ilooking The Lunar Solar Power Ilooking

]]> http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/comment-page-1/#comment-3711 jim nutt Thu, 20 Jul 2006 13:33:46 +0000 http://blog.modernmechanix.com/2006/07/19/sun-furnace-goes-to-work/#comment-3711 Radio Shack used to (and may still) sell solar cigarette lighters. They were a small parabola with a holder for the cigarette at the focus. Not being a smoker, I can't say how well they worked for that purpose, but they were useful for other things... Radio Shack used to (and may still) sell solar cigarette lighters. They were a small parabola with a holder for the cigarette at the focus. Not being a smoker, I can’t say how well they worked for that purpose, but they were useful for other things…

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