Tales from a Ventilation Lunatic

[sternwake]

Looks like It sheared off more than 3 impeller blades, and The Jaro fan also broke at the hub. 

I tried to snap off the remaining fan blades with fingers assuming fragility, and none came off easily.  I guess the fan was spinning much faster than I thought when it fell, sheared off 3 plexiglass finger guard louvers, and ingested them. I don't think any fan impeller  spinning more than 450 rpm would have been undamaged in the same instance. 

But the hub breaking, and the fact that the fan frame is not perfectly flat, but rocks a little bit on the plexiglass points to some lacking  of structure, the bad vibrations is another reason to not buy these fans to run them more than ~10.5v, granted it is still extremely powerful at 10.5v and a heck of a lot of air movement for 6$.

I removed the impeller and installed the one impeller I tried to balance, yet made it worse.  I only noticed the broken hub support afterwards.

  Its supposed to get hot the next few days and this new fan shroud is way more effective at keeping front of Van cool than previous plywood model which has 2 fans stinger fans exhausting.

Here's how I fix broken plastic and other things. Simple superglue would likely be more than adequate, but I use a cut off wheel on the dremel and cut a groove across the break. I fill that groove with superglue then drop two pieces of carbon fiber roving into the groove and push them into the middle of the superglue pool, and they turn wet and black and shiny and I push them flaround anf flat to spread the strength out over a wider area  I leave it to cure many hours without seeing any stress.  Superglue when used like this takes many hours to turn hard and strong.

   
   
   

The last photo shows some drilled holes on the hub of the fan where I tried to lighten one side of it.
Still irritated i failed so badly trying to balance this impeller.
Looks like I got a backup Jaro fan body, but hoping the Delta FFB1212EHE Delta fan is as good as I hope.