Defrost Fans

[Dan L]

That looks like a nice, clean installation. It ought to work very well to de-fog. I spread my two holes apart a bit more but it all depends on the room underneath the boot cowl.

I didnt realize that that computer fans operated on 12v DC power.

[TroyBranch]

Just put the boot cowl on, here is what the final install of the fans look like. Fan is on the bottom so I did not bother with the grill.



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[Cubrath]

Even if you never need them they look cool!

[David H]

Troy,

I am thinking of putting the same fans in as you did.

How did you cut (punch?) the holes.
Do you have the measurements for the hole centers?
Where did you mount the switch? I don't see it on your beautiful panel.
Would you install it any differently? or make any changes?

Thank you,

David

[TroyBranch]

I used a hole saw. Just go slow so you don't wreck anything.

I put the switch on the left root panel.

They clear the window well. I do shut them off when in the air as it gets too cold.

No changes.

I would have to measure the locations.


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[Dan L]

Inspired by what Troy did on his de-fog system I decided to add a fan to my tubing too. The little 2" fans in 12 volt are around $20. The W31 type switch I put in the panel was more

IMG_2192.jpg

My tubing is 1.5" diameter and so I needed a couple of reducers. Those I machined from UHMW, etched with Bulldog and sprayed flat black. There is a noticeable improvement in the volume of warm air. The project added about .25 pound, all parts considered including the wiring.

image.jpg

One reducer about finished and one more to machine.

[Dan L]

I replaced a 2” check valve on some house plumbing. I went the simple route and bought a slip-on hose clamp type. Looking at it I realized that this housing for the valve would also make a simple holder and transition to round for a 12 volt fan like I used, with the flapper removed and the fan held between the halves with longer screws.

C3FEB82C-1891-4F31-A13D-E28AFAC57388.jpg

The two housing halves in my original picture I machined from solid plastic on a lathe. I’d have gladly paid $22 for this check valve at the time.

In plumbing use the check valve is held onto the PVC with rubber sleeves and hose clamps. The sleeves pull off of the plastic valve housing and would be replaced with SCAT tubing.