Reply to: Dyson - Bladeless Fans

[wobbegong]

I'm not sure I've seen his steam driven train? Is it any good?

We've got one of those new Dyson "Urchins" to clean out the flues every six months.

[Spacecadet]

Also had a quick chat with James Dyson about it who was there. I mentioned to him about the Coandă effect as I had heard this wasn't new. He joked! 'that it was magic' before eventually saying it utilizes something called the Deprimo effect???

Deprimo is a spell which places immense downward pressure upon a target, which may cause the target to fracture

[MarillionFan]

So MF, have you bought a fan yet? Should come in useful now tha the weather has turned to tulipe!

Forgot about this until the missus just reminded me.

Had a chance to see one of these at the weekend at Vintage.

There was a complete Dyson stand(obviously they think its cool to be a style company).

Saw one. Stuck my hand through, checked it out etc. Pretty cool, but didnt produce much air flow IMO.

Also had a quick chat with James Dyson about it who was there. I mentioned to him about the Coandă effect as I had heard this wasn't new. He joked! 'that it was magic' before eventually saying it utilizes something called the Deprimo effect???

[DS23]

Oh, you meant that one. I was thinking of the colander effect.

You know, the usual CUK one where someone presents an argument and it's full of holes.

Taxi for pondlife.

[SupremeSpod]

So MF, have you bought a fan yet? Should come in useful now tha the weather has turned to tulipe!

[Pondlife]

You're wrong. In fact you're too stupid to realise that you're wrong.

From the manufacturers themselves... MD Helicopters - Notar Technology

Oh, you meant that one. I was thinking of the colander effect.

You know, the usual CUK one where someone presents an argument and it's full of holes.




Taxi for pondlife.

[shaunbhoy]

Don't they make the Apache?

Thought that was The Shadows?

IGMC

[threaded]

Pfffft what does McDonnell Douglas know

Don't they make the Apache?

[minestrone]

foogling like a mad man.

[Spacecadet]

You're wrong. In fact you're too stupid to realise that you're wrong.

From the manufacturers themselves... MD Helicopters - Notar Technology

Pfffft what does McDonnell Douglas know

[MarillionFan]

Go and google coanda and dyson.

[SupremeSpod]

Well that is wrong. It uses the Coandă effect as much as a hair dryer.

You're wrong. In fact you're too stupid to realise that you're wrong.

From the manufacturers themselves... http://www.mdhelicopters.com/v2/notar.php

Using the natural characteristics of helicopter aerodynamics, The NOTAR®anti-torque system provides safe, quiet, responsive, FOD-resistant directional control.
The enclosed variable-pitch composite blade fan produces a low pressure, high volume of ambient air to pressurize the composite tailboom.
The air is expelled through two slots which run the length of the tailboom on the starboard (right) side, causing a boundary-layer control called the "Coanda Effect". The result is that the tailboom becomes a "wing", flying in the downwash of the rotor system, producing up to 60 percent of the anti-torque required in a hover. The balance of the directional control is accomplished by a rotating direct jet thruster .
In forward flight, the vertical stabilizers provide the majority of the anti-torque, however directional control remains a function of the direct jet thruster.
The NOTAR®anti-torque system eliminates all of the mechanical disadvantages of a tail rotor, including long drive shafts, hanger bearings, intermediate gearboxes and ninety-degree gearboxes.

[minestrone]

From your same wikipedia article

"The McDonnell Douglas YC-15 and its successor, the Boeing C-17 Globemaster III, also employ the effect. The NOTAR helicopter replaces the conventional propeller tail rotor with a Coandă effect tail."

Well that is wrong. It uses the Coandă effect as much as a hair dryer.

[Spacecadet]

No, that is completely wrong, the helicopter uses the third law of motion.

From wikipedia...

"The Coandă effect is the tendency of a fluid jet to be attracted to a nearby surface"

There is no nearby surface on these devices.

Expects churchill to post the first link on google with NOTAR and Coanda in it.

From your same wikipedia article

"The McDonnell Douglas YC-15 and its successor, the Boeing C-17 Globemaster III, also employ the effect. The NOTAR helicopter replaces the conventional propeller tail rotor with a Coandă effect tail."

[minestrone]

I edited the question.

Answer : They both use the Coanda effect to replace the use of rotating blades.

Hth. However, I doubt it.

No, that is completely wrong, the helicopter uses the third law of motion.

From wikipedia...

"The Coandă effect is the tendency of a fluid jet to be attracted to a nearby surface"

There is no nearby surface on these devices.

Expects churchill to post the first link on google with NOTAR and Coanda in it.