rv6ejguy
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"Bladeless" Propulsion
- Thread starter rv6ejguy
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“A unique propulsion system that uses turbo-compressors ...with no moving parts”.
Yup, that will be a unique turbo-compressor.
BJC
Yup, that will be a unique turbo-compressor.
BJC
Aesquire
Well-Known Member
Stupidly dishonest to say there are no moving parts.
Seriously, no one else noticed the front ducts retract into the passenger leg space?
Models have typically enormous amounts of power compared to full size aircraft, and in this case unless they've made a real breakthrough it's even more true. Count me as hyper skeptical. I have my doubts it would fly in conventional winged flight full scale with 400 pounds of humans much less do VTOL with Tardis retractable bits.
I could be wrong.
I'm still waiting for Blackfly to come to market, and it has actually flown with a human. This is Less Real than my Moller M400 in my imaginary volcano lair.
Dan Thomas
Well-Known Member
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- Sep 17, 2008
- Messages
- 5,756
It's just another Dyson fan idea. Not that efficient at all. It would need some serious turbine bleed air to lift anything.
henryk
Well-Known Member
=Thrust Force x High off nozzle center < Fan Weight x Bottom Radius ...
(STABILITY !)
gtae07
Well-Known Member
I'm not really sure what the advantages of the Dyson fans are, other than looking sort of cool and not providing an obvious enticement to small children for the insertion of body parts, objects, liquids, or other substances.
Hephaestus
Well-Known Member
eductors - they do move a greater volume of air than the fan that's hidden in the base does by itself.
trimtab
Well-Known Member
Induction is important in aeropropulsion already...it's not new. I'm just not clear on how this is an advantage as it is used here.
Can anyone chime in? Flow induction is inelastic...that is, energy is not as conserved, while momentum can be.
Can anyone chime in? Flow induction is inelastic...that is, energy is not as conserved, while momentum can be.
trimtab
Well-Known Member
This still works on people for some reason. It's like saying electric cars are zero emissions, nuclear energy is zero emissions or renewable, etc. I could argue that powering my home on 'D' cells from WalMart is zero emissions.
These arguments are solely made for the Professor Hills out there selling a marching band to a new group of investors.
“......” - P T Barnum
Hephaestus
Well-Known Member
trimtab
Well-Known Member
What does "Does it work in certain scenarios - like the dyson fan - yup. " mean?
You use power to increase the pressure and speed of a small mass flow rate. Then you release it in an annulus. It inducts air inelastically. A pleasant flow of low speed air is the result. If you double the mass flow rate, you lose half the power.
You use power to increase the pressure and speed of a small mass flow rate. Then you release it in an annulus. It inducts air inelastically. A pleasant flow of low speed air is the result. If you double the mass flow rate, you lose half the power.
Tiger Tim
Well-Known Member
I wonder if I could get a set of these 3D printed for a radio controlled A-10 to confuse the crap out of the local RC club members...
Aesquire
Well-Known Member
The sales pitch on The Dyson fans is they supply a smooth flow of air and don't make sounds "warble" as they pass through regular fan blades. That's true.
But they aren't silent, they make a high pitched whine as the turbine in the base spins at very high rpm and moves air at high speed into the duct ring that turns ve!ocity into pressure. Then pressure into speed, dragging outside air with it at much lower speed.
My brain hurts just contemplating the math on cubic feet per minute divided by watts consumed.
But they aren't silent, they make a high pitched whine as the turbine in the base spins at very high rpm and moves air at high speed into the duct ring that turns ve!ocity into pressure. Then pressure into speed, dragging outside air with it at much lower speed.
My brain hurts just contemplating the math on cubic feet per minute divided by watts consumed.
Same as previous thread here: Propless ducted fan ?
Aesquire
Well-Known Member
yep see post #3 
This investment opportunity exists (and thrives) only in the same physics and logic universe as the cartoons most of us grew up with. Acme Products, Wile E. Coyote surviving a fall of 3000 feet and becoming an accordion, Daffy Duck surviving a shotgun blast to the face, etc.
There is a good break
BJC
There is a good breakfast restaurant in Wile’s hometown, Acme, Washington. I have a pilot friend who lives just west of there.
BJC
