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Re: Anyone working on solutions that work on 12VDC and facilities without compressed air?

Dr. Flywheel
 

For those of you who insist on using small electrical fans for providing pressurized air to a "surge ventilator", I suggest to look into the use of "ducted fan" hobby parts. I tested a few of them; however, the negative side is that they are noisy and only good for providing a source of pressurized air with fixed dynamics. This may not be a negative factor for your design, so by all means, you are welcome to try.

On the?positive side: ducted?fans are much more optimized to yield pressurized?air at reasonably high volume. They are typically used to power model?airplanes by providing through-fuselage air thrust. They are also very compact. Unit prices are between $15-80, depending on size.

As I mentioned?earlier, for now I am sticking by the bellows type of pump, utilizing air mattress?inflating foot pumps and focus on improved airflow dynamics.

Here is an example of a ducted fan, available from hobby stores:
image.png

See:?

All the?best.

--Ron
N7FTZ


On Fri, Apr 10, 2020 at 9:07 AM MA <wa9zco@...> wrote:
On Fri, Apr 10, 2020 at 10:38 AM, <sydneygold888@...> wrote:

Sydney,

I used surplus fans and they were screwed together and tape/sealed to the pipe reducer assembly.? Used two different models connected in series and neither produced adequate pressure to be effective, not even close to where it needs to be.? Could not even pilot the Orbit valve.? Only tried this because I had the parts on hand.
can I ask the gentleman who tried axial fans in series , which models did you use and were the joints sealed with gaskets to prevent leakage ?
Picture enclosed.

Marc Al
WA9ZCO

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