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FAQ Frequently
Asked Questions
Why is it called "excuser technology"?
It draws on the
analogy of a person running through a crowd shouting "Excuse
me, excuse me!" The louder he shouts, the faster he can go.
The key feature of excuser technology is the separation of the
air in the path of the vehicle thus reducing drag (air resistance).
How does an excuser work?
An excuser creates
an explosion followed by an implosion.
First it expels
some or most of the air out of the path of the vehicle. There
are a few different ways this can be done, but the best way is
to explode a two parts hydrogen to one part oxygen mixture in
front of the vehicle with the explosion directed perpendicular
to the path of the vehicle. The steam resulting from this explosion
trails the explosion as a cylindrical plume or bubble.
When this plume
reaches the nose of the vehicle it condenses (implodes) because
the nose is cooled by a refrigerant, for example. The nose then
experiences a reduced gas pressure and density, and the ambient
pressure on other parts of the vehicle pushes the vehicle forward
into the steam plume. Thus both thrust and reduced drag are generated.
Can lift be generated by an excuser?
An excuser can create
a region of reduced pressure on any cooled surface. When a plume
of steam makes contact with a cold surface it is drawn towards
the surface by the pressure reduction. Newton's laws of motion
ensure that an equal and opposite reaction occurs tending to draw
the surface towards the plume. Thus lift is generated.
Can an excuser be used on the ground?
People, etc. must
be shielded from the explosion and implosion. Given that, surface
vehicles are possible.
Can an excuser be used underwater?
If an excuser is
designed to operate independently of the oxygen in the air then
it can operate underwater. The water can be used as a coolant
for the condensing surface.
How fast could an excuser drive an aircraft?
The speed of the
air molecules striking the rear of the aircraft limits the speed
(rms speed of air molecules is about 500 m/s at STP). Some extra
source of thrust would be required for speeds to approach or exceed
this speed. The reduced drag would then become the key benefit
of the excuser.
What research needs
to be done?
There are many factors
which will influence the efficiency of an excuser system, or example:
the delay between the explosion and implosion of a part of the
plume; the size, shape, and intensity of the explosion; atmospheric
conditions; the speed of the aircraft; the size, shape, and temperature
of the condensing surface; etc. The influence of all these factors
must be fully understood to build an efficient excuser system.
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©Copyright Sapoty Brook 2005-2008.
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