Battling Fog in My Box Goggles

Crazy part is that we are in October and the temperatures are still going above 90 F (32 C). With all of the rain that we have had, in the past month, this hot weather has also brought with a ton of humidity. Recently, I changed out the seals on my Quanum V2 goggles, to keep more of the light out, but this had a negative impact on the levels of humidity getting stored in them. This humidity, of course, brought on fogging of the Fresnel lens and the monitor.

I had to find a solution, so I hit up Google, and quickly figured out that my solution was going to be to install a fan in my goggles.

So Many Fans!!

I went onto Amazon, to search for 40mm fans, and found a TON of options. I read through all of the reviews and  decided on the MakerFocus 3D Printer Fan. They come in a pack of 4, so at least now I have spares if they don’t last long.

These fans are 12 volt fans and suck up only 80mA of current or 0.96w. They state to have an airflow of 5.75±10% CFM and have a cable length: 280mm. Supposedly, they can last up to 50,000 hours!! If I get 5% of that, I’m sure I have gotten my moneys worth.

My goggles run on 2S batteries, so I won’t be reaching the 12 volt mark, so the fan won’t be running at full tilt. This should be good for noise levels and also for the current draw.

Hacking into the Goggles

In order to mount this fan, I am going to need to cut a nice big hole on the top of my goggles. This was a little nerve wrecking, since I don’t have any other goggles to use yet. If I mess this up, I’ll be out of flying for a bit, as I don’t have the cash currently to replace them.

I placed the fan on top of the goggles, outlined the hole with a  pen and then used a box cutter to cut into the foam. Easy peasy!

I made the hole just the right size, so that I didn’t even have to use any glue to hold it in place. I recommend,  if you do this mod, pay attention to where your Fresnel lens sits, when you are using yours, and cut the hole directly above that location. This way, some air will go to the front of the lens and also the back of the lens along with the monitor.

Now I had to ensure that the fan had a way to supply clean air into the goggles. Because the Quanum V2 have a glove, which covers the goggle frame, I had to MacGyver something on top. I ended up taking a toilet paper roll, cut it in half, covered it with Duct tape (I know, should have used black tape, but you use what you have) and then duct taped it onto the top

When the glove is on the goggles, and the goggles are on your face, you can’t even see the white duct tape

My Quanum V2 goggles came with a power plug, which already had 3 different connections on it (outside the one that fits into the battery). 1 of those connections is going to my receiver and the other to my monitor. So, this left 1 unused. I chopped off the plug and then wired up the leads directly to the fan. For now, I’m just using electrical tape, but I am planning on adding in a switch. This way, I can decide whether I want to use the fan or not. Look at that professional wiring!! LOL!!

How Does it Work?

Well, I’m happy to report that adding in the fan took care of all my fogging issues. I can now fly in 90 degree, extremely humid weather, and not have to worry about not being able to see. If you have these goggles, or any goggles without a fan, I definitely recommend trying out this mod. The fan is also very quiet. Since I am not running it from 12 volts, the fan only runs at about 60%, making it almost noiseless.

This mod will have to due, until Christmas time, when I am going to treat myself to a pair of real goggles:)

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