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-   -   20 to 25 CELL DUCTED FAN SETUP? (http://www.rcuniverse.com/forum/electric-rc-jets-198/11361234-20-25-cell-ducted-fan-setup.html)

SPEED JUNKIE 01-08-2013 04:38 AM

20 to 25 CELL DUCTED FAN SETUP?
 
Anyone tinkering with higher voltage setups? Looking into 75 to 100 volts to power much bigger fans then what we are using today. Any mad scientists secretly assembling the future in your basements? Combing the universe for any info.:D

Hokie Flyer 01-08-2013 06:30 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
Not sure if there are any esc's on the market that can take those voltages yet.  It"lll be interestint to see how high high-voltage set ups go.

Dayaks 01-08-2013 07:05 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
I imagine you'd have to jump to commercial voltages (think VFDs) which is around 400 volts. The device you want is quite dangerous, both the voltage and EDF itself... I'd be surprised to see a company with the balls to produce that in our sue happy world, plus it's very niche.

You'll probably have to be the basement mad scientist yourself. ;)

speed is life 01-08-2013 11:40 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
Except for commercial apps there are no ESC's or motors for this type of thing.<div>Reason? Liability (and technical problems with what you could call "SHV" ESC's)</div><div>
</div><div>You do realize that above ~60V DC current can potentially be fatal? That's the rough threshold of the current being able to cross dry skin, and roughly equates to 14s LiPo.</div><div>
</div><div>There is no ESC manufacturer that wants to be sued for wrongful death by electrocution.</div><div>
</div>

SPEED JUNKIE 01-09-2013 06:23 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
So..... Nothing is available over the counter obviously. Lawsuits, death and dismemberment seem to be the buzz words for the subject matter. Mmmmmm.....Bummer. Cleaning out my basement, raising my life insurance policy and putting an ad in the local region for a electronics engineer and aerodynamicist who need extra cash doing side jobs.:D

speed is life 01-09-2013 07:06 PM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
<div><font face="Helvetica"><span style="font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469);">"...</span></font><span style="background-color: rgba(255, 255, 255, 0);">Lawsuits, death and dismemberment seem to be the buzz words for the subject matter. Mmmmmm.....Bummer...."</span></div><div>
</div><div><font size="3">Whatever; read these:</font></div><div><span style="font-family: Helvetica; font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">http://www.rcgroups.com/forums/showpost.php?p=2229753&amp;postcount=13</span></div><span style="font-family: Helvetica; font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); "><div><span style="font-family: Helvetica; font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">
</span></div>http://www.rcgroups.com/forums/showpost.php?p=2229852&amp;postcount=15</span><div><span style="font-family: Helvetica; font-size: 15px; line-height: 19px; white-space: nowrap; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">
</span></div>

SPEED JUNKIE 01-10-2013 04:13 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
That's exactly what my wife says. Very good info. Thanks for posting it!

Dayaks 01-10-2013 04:51 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
My skin resistance is only 10k ohms dry and 500 ohms wet... Not 500k ohms as the one post suggests. 500k might be lightly brushing a wire, when I measured 10k ohms I was gripping it like I'd work on it.

Just wanted to note - if your skin is wet or sweaty it GREATLY reduces the voltage needed to kill you.

Oh and fuses likely won't help since they are generally multiple amps (if not hundreds for us) and it only takes .1 amp to kill you!

Tachyon Alpha 03-28-2013 10:18 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 
Hey there, Speed - do you sell the TF-8000 with motor and ESC setup, complete as yet? Might not need "litigious" levels of power with the right conventional setup...

Henke Torphammar 03-31-2013 01:30 AM

RE: 20 to 25 CELL DUCTED FAN SETUP?
 

Quote:

ORIGINAL: SPEED JUNKIE

Anyone tinkering with higher voltage setups? Looking into 75 to 100 volts to power much bigger fans then what we are using today. Any mad scientists secretly assembling the future in your basements? Combing the universe for any info.:D
Still settles for 14S to stay withing the european regulations.

http://imageshack.us/a/img337/5836/2...8zed201209.jpg


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