This video took 40+ hours to produce/edit/voiceover. My higher production quality videos never seem to get many views compared to simple stuff? Oh well, it was a good experience.

you are such a great asset to anyone learning in the fields you cover. Thank you and keep up the awesome work😊

Awesome video Dan. I love how you present your ideas on applied sciences and the results of your experiments from even 6 years ago! I'm always learning something new from you brother!

Your generosity in sharing is unparalleled. You're the king of highbrow lowtech!! Thanks yet again!!!

Thanks a lot Dan, for taking time to answer. I take your solutions very seriously. Amazing and affordable.

Gotta love this guys "fashion sense". Truly a Florida Man!!!

It's always fun until someone gets hurt, then it's hilarious! I absolutely love Denise reaction at 08.15

Dan, you my favorite backyard genius... still 👊

Really good video, full of useful tips. Excellent low cost collector. I made one of these reflectors forty years ago. Used commercially available ground and polished stainless sheet circle sheared. It worked OK, never measured it but I'm sure it would melt lead. College project in Phoenix. It was already 140 degrees on the roof of the engineering building.

Thanks Dan, I live in the Philippines and this is going to be a big help in helping those in the villages to cook. I am home (USA) for the holidays. I just want to make sure I get the right blanket.

Metric System please.

The mylar has held up for 4 weeks so far with a vacuum. And when the vacuum is removed, the reflective surface is flat and near distortion free so it seems to hold up without expanding. The mylar can accept tight stretching when making. This prevents sagging.

I believe that in ancient times someone suggested polishing shields and using the reflected energy of the sun to decimate an approaching fleet of wooden ships. I see now how this could have happened. Great video. Thank you for sharing.

Your paintings were fantastic! I had no idea you both were so talented!

Thank you for the nice comment. I thought this video would have been a bigger hit. Almost 9 months and total video views = what someone burning a cell phone gets in 2 days. Our videos are getting buried in search results for some reason. 94% of the views were driven by our website, or FB page and our KZfaq homepage. Only 1,800 views from YT.

Give this man a TV show and a Noble Prize too.

Entertaining and informative. I can see so many potential applications for this.

Another Fantastic production! Thank you for this and all your videos.

Pretty stright foward and great instructor skills, that you Mr. Rojas.

Very well produced, thank you for taking the time to make this for us.

Gonna try that stretched mylar mirror in my aquaculture 3 in 1 root electrified hydroponic enclosure. Thanks man！

Love your Experiments ! Started watching years ago. 🔥 I have to make a solar water distiller to make drinkable water and also to cook with. This is the way 😎

Thank you Mike.

thanks for transfering this great knowledge i love physic power

Phenomenal video. Great quality and very well put together. Keep it up

Very knowledgeable and obviously sincere dedication to the art and science of the craft!! generous sharing of hard earned expertise. Thank you.

Excellent detailed instructions. Thank you very much.

Yes, then a thin spray of enamel paint to preserve it. The two I made are sitting outside in FL weather, while the humidity is lower than summers, they are both holding up well.

Your videos are great. I like that you put numbers to your projects and for this one show the square version has practicle precision. If I were to do one I think a 6 or 8 sided one would be almost as easy to build. Probably round over the inside edges with a router. For me practicle solar reflector applucation will be soil / mulch sterilizer of 55 gallon steel drum with aluminum foil over scavanged coroplast reflector. Don't know if Anyone has done this or not, seems obvious. Another low cost / low fabrication / universal parts availability solar cocentrator design uses a 4'x4' piece of masonite cut in a spiral with aluminum foil glued to it attached to 1x2 crosspieces cut to angle the around 2" wide spiral into a fresnel reflector. Use search term - steenblik spiral fresnel - redrok is an interesting hit. I think wind will be less of a problem with this design than solid designs.

A BIG THANK 😊 🙏 I live in guatemala this will be a LOT of help

Thanks for all your inventions and projects Dan ! I really enjoy your channel .....good stuff Much more honest and down to earth than Myth B.....s :)

nice art !

Okay - one trick you missed (besides using decent plywood for a back) is once you have it stretched, to go ahead and do a pass with a hair drier. I THINK this will remove the last vestiges of creases - unless the blanket was heat-pressed, which I don't know why it would be. Mylar is apparently a good memory material and returns to its original shape with just a bit of heat. The sun won't heat that mylar up, but hot air will.

I like this concept ,it is the method that I have been looking for..Back in 1992 I polished an 8 ft diameter Cband satellite receiver dish to be used as a solar collector .The polishing of this dish took a long time and the reflectivity was only around 75% at the best .It did set lumber on fire.

Fantastic! I got a new project for my weekend!

Yet another awesome video. :) I hope you two are still involved in the art world too.

Very nice work, this can also be used with an old font (cast iron) radiators, mounted in a frame and a clear plastic cover to protect the radiator from the cold air. filled with water and connected to a storage tank of 200lt - 400lt. by fitting a pressure release valve and a central heating pump the water in the tank can be heated to 40-50 deg during the day. this tank can be placed in line with the other tank electrically heated to supply your bath or shower etc. by placing the new tank vertically and feeding in cold water at the bottom and taking the hottest water from the top, to feed your electrically heated water tank.. your ability to supply hot water is now doubled as you will be feeding the normal tank with hot water or well warm water rather than cold water direct in from underground.. result is you can take longer showers, fill a bath tub and still have gallons of hot water left.. the amount of electricity required every day to reheat the tank will decrease. and you save a fortune....

THANK YOU:-)

What an AMAZING channel!

I have been looking, looking, looking for cheap reasonable solution for a green energy stainless steal boil tank. THANK YOU SO MUCH FOR ALL YOUR HARD WORK!!!

Denise thanks you for the comment too:-)

Wow! You've explained it so well!

Damn, check you out, with your fancy editing and high quality production :P Fascinating video Dan.

It is interesting. Excellent method! Thanks

Thanks, Dan!

You two are amazing.

Noted, and added to the title:-) THANK YOU!!!

What an amazing experiment!

This is very informative

Excellent work Dan

Thank you for the video!

Good cheep free energy concentration! Brilliant!

I’m curious if you have footage of the Mylar with electrical current running through it in the dark? Might be a fun short video :)

Hi Dan! I made a smaller scale version of this a while back. I used tin foil instead of mylar. But it seems that the material stretched under the pressure constantly, so a few days later it hit the bottom and become useless. Does mylar stretch similarly?

Hi Julie, im unsure about the electrical part myself, but the shut off valve / vacuum 's function is to change the focal length, ie: focus/ concentrate the light, so yes to use this to cook, you'd want to focus the suns light on the pot / pan, you will need to do the vacuum / shut off valve bit. The electrical part probably just makes the surface a bit more reflective, but maybe not 100% necessary

This is one neighbor you don't want to piss off, especially on a sunny day.

love your videos, man!

I have a question can you use that to position the sun to your solar panels or will they get too hot and mess it up ?

Hello Dan, I love your videos, they're very informative. Have you ever tried this using a round form for your vacuum frame? It may not be worth the effort, but it seems like you could get a very precise focus. Since you use coroplast material, you could build the whole thing out of it. Using a few thicknesses to beef up on the sidewall , would increase the thickness of the side wall, making it strong. Just a thought. Thanks for the great video.

I was so totally expecting Dan to make all of Denise's 2 foot long hair stand on end with the charged mylar!

Thanks for the videos! Could using hula hoops some way with this type of design yield a better parabolic shape and a better focal point?

Thank you for your videos. What is the smallest you could do.

excellent content, thanks!

I wonder if you were to leave some slack in the Mylar instead of stretching tightly, then vacuum . would you have a concave that would give a more focused light?. I’d be interested in trying to make a heat treating oven or forge using this technique

Haha, love the reaction of wife, doesn't get mad but will probably get even soon! That is the spirit.

Dan thank you.

I will have a video on a round mirror. I just made one in 15 minutes:-) It is like a drum and a near perfect parabola/spherical shape. The mirror flat is distortion free, vacuum it casts really good images on the wall. May be a first surface telescope option too. Will test with the moon tonight if the clouds go away! With a little trick, the wrinkles go away.

Yes, our Level 2 lenses will be ready soon. They are almost ready.

Most fun couple on the planet, i am convinced.

That's an awesome idea. Bet if you did that to the top of a 55gallon drum you could easily cook with the focal point!

How do I make mirror with vacuum deposition? I can't find that video. Did you make the video? Thanks

Just subscribed...! Great detailed video. I'm searching for ways to heat water for my outdoor pool. So, what is the minimum focal length on this specific mirror device? I'm thinking it may be a little too long for my needs, and may want to start with a 2x6x48 frame.

If you were to inlay some sort of circular former into the square frame before suction it would form a circular concentrator albeit with a smaller area than the square -would there be any advantage to a circular concentrator? (E.g. more precise focal point perhaps...)

fantastic video, thanks for the effort involved in putting this together for us. im guessing that if the chamber loses the vacuum then the mylar will revert back to its flat form? thanks again.

Thanks, I needed it for an artsy teacher friend.

Watching this reminds me of a 1961 Adventure/Fantasy/Sci-fi ", Atlantis the Lost Continent". A dictator mad scientist has a giant mirror covered with crystals is powered by the sun and shoots a giant laser like Ray! Cool sci Fi effects! He fights with the hero in the movie and gets zapped into a skeleton by his own device that's swinging side to side by an Earth quake......

Dan, can this technique be used to make a two-way mirror? I'm in need of a cheap one for Halloween and your comment about being able to see through the non-silvered side makes me think it might work.

Hi Dan, did you ever try to heat up the tip of a Magnetron with your lenses, to check if you can get any juice out of it?

Your contributions to experimental science involving green energy are highly commendable and thanks a lot for sharing all your beautiful and practical videos. 🙏🙏🙏🙏🙏🌹🌹🌹🌹🌹❤❤❤❤🙏🙏🙏🙏

What about doing a cone copper coil that tightens with the beam. Increased surface area might increase output

What was the goal of the step where you removed some of the aluminum with high voltage electricity? Is this step necessary?

The first surface mylar will oxidize if placed on the outside years of exposure. Place the conductive first surface side, inside and mist with enamel paint. This seals the aluminum exposed surface and it will last years without turning golden yellow. The mylar is inexpensive so the front can be re-stretched every year or so with extreme usage. I have mylar flat mirrors that have sat in the rain and Florida humidity for years and they are still good.

thanks for the video. God bless u

lmao. "You can make your own seizure ray".... had me laughing. Good stuff!

Super!

you said swop the shinier side to the outward side. which is the shinier side, the conductive surface or the other?

Hi Dan, you may have covered this, but I missed it - what is the thickness of the mylar and does it matter ? Thanks in advance

Les has a good TV show, the water bottle trick and clear plastic water lens would be a perfect fit. Happy Holidays!

Yeah that barrel comment, well.. use the top 8-12 inches from a plastic barrel, use the Mylar blanket as this time, on the open back side make a air tight diaphragm of a stronger material like a pond liner, a lever connected to the center, a hand grip, squeeze the handgrip and lever to focus, on the opposite side a loop handle to steady aim.. instant focus mirror. Real-death ray. Add a HID LED and you got a hand held stage light. What a cutie.. (and I mean Denise) I enjoy the videos.

flexible glass with a mirror finish similar to what corning has developed would be an ideal material to experiment with

What do you layer the surface of your custom solar mirrors with? Is it aluminum, Silver? Thanks fro the video!

am new to this solar stuff....but am eager to learn, thus I saw ur vids. Today, am trying out my first attempt to make dinner in a windshield shade cooker on picnic table. Am collecting beer cans for a heater to test on my 10X12' shed, but wonder how collecting heat with ur mylar frame may really be the optimal solution-any feedback/thought? Altho am fairly mechanically inclined (for a chick), got 2 questions. 1)Electrical charge part that zapped Denise, 2) shut off valve/vacuum. Necessary?

Great,as always.

Real free energy!

raise it up higher.. nice job.

"Honey, i destroyed the car tyres, we'll have to stay in bed today"

BRILLIANT!

can you do this with a regular mirror? i only need it to bend slightly because my target is miles away.

All mirrors are 2 way mirrors. All glass mirrors when coated have a first surface side but grey paint is added to cover the aluminum for protection in household mirrors. Get a good mylar blanket and stretch it flat. The side with the most light will be a mirror, the darker side = cloaked 2 way view. You need a brighter side like cop movies. Detectives in a dark room, interrogation is a well illuminated room. Either side will work, the light makes the difference. Swap the light swap the effect.