New Spacecraft Propulsion
By Steven Hampton
A Functional Dean
propulsion: Space propulsion Dean Drive inertial engine loses
weight, 20x more efficient than rockets by using centrifugal force
For 130 years - and
thrice as many patents - inventors have
been working on reactionless drive or "space propulsion drive" to achieve anti-gravity.
YouTube video channel is:
Finally, a PRACTICAL space
In 1980 while going through my father’s old magazines, I found an article about
the Dean space propulsion drive. Fascinated, I showed the piece to my long-time friend Steve
Hampton who became engrossed with the concept. First patented in 1959, Norman L.
Dean’s contraptions propelled themselves using the centrifugal force of spinning
weights. Such “anti-gravity” machines appeared to break Newton’s third law of
motion and the two resultant conservation laws in physics. However, the
long-lost secrets of Dean’s inertial propulsion (IP) system died with the
well-known but controversial inventor in late 1972. All that publicly
remained of his fantastic impulse engines were a half-dozen magazine articles,
two perplexing patents, and lots of conflicting opinions.
Inertial Engine E-2
with its power supply, PS-1 – circa 1988. This modified Buehler
drive (6"x5"x4") was an attempt by Steve Hampton to decrease negative phase
acceleration in order to bias the oscillator into positive phase
momentum. Lessons learned: loss of rotor momentum anywhere within
the cycle means death to centrifugal force; also, higher torque is
needed to effectively drive the rotors.
Thirty-five years of research and 9 prototypes later, Steve
has unlocked the long-lost secrets of the Dean space propulsion enigma. Though
the new spacecraft propulsion engine E-8
is based on the Dean drive it’s different enough to warrant a new patent with 18
claims. You see, according to a handful of witnesses, Norman Dean could demonstrate a
weight loss of only 5%. Though this was a great feat, we solved all the big
Inertial Engine E-3
built by Steve Hampton in 1989 is
considered a high-frequency device, as far as mechanical inertial
drives go. It has fewer moving parts than a Dean drive (thus low
maintenance) and could be an efficient source of propulsion for
satellites and deep-space probes. Lesson learned: Though E-3 is a
viable drive; greater radial vectoring is required to generate
sufficient thrust to work against Earth’s gravitational field.
The new spacecraft propulsion
engine E-8 alone took Steve
sixteen years in his
spare time to design, build and perfect. Three of those years were spent finding
the right ON and OFF times for the shifters and the ON and OFF times for the
clutches. We also had to find a way to rapidly clutch and release low-friction
rods perpendicular to motion with no leftover clutch-pad or rod debris. Then it
took two years to find the positive stop settings that allowed us to fine-tune
optimal shift and clutch times, not to mention 14 revisions that gradually
improved performance and stability. It took him almost two years just to draw up
the patent papers. As a consultant, I too devoted time and energy to the project
and helped design the clutches on this new spacecraft propulsion system.
in 1992 was Steve’s first Dean drive.
See video above. We demonstrated this gem at
the now-defunct International Tesla Society’s Extraordinary Science
Symposium back in 1995. (At that time it wouldn’t work because we
unknowingly had the power supply set to the wrong voltage.) It can
pull a load equal to its weight. Though a low-frequency system, Dean
Drives can supply the driving force needed for thrust to move loads
Lessons learned: The rotor/carriage weight ratio has to be high
for maximum thrust. This single-cycle engine will translate on
roller bearing wheels at around 2"/sec.
So what are impulse engines?
Impulse engines are machines that, aside from being engineered for space
propulsion and levitation,
create an unbalanced force from a balanced system, or in Star Trek terms,
“impulse drive”. Such machines don’t use friction with the ground, displacement
of water, aerodynamics or the expulsion of mass to propel it. Its thrust is a
pulsed unidirectional phenomenon cyclically plucked from the angular momentum of
eccentric rotors  making it 20 times more efficient - and
safer - than current
Electricity is the only requirement.
How do they work?
The new spacecraft propulsion drive we are presenting - E-8 - bias’s the axis of spinning eccentric rotors
at a precise time in the cycle shifting them into exaggerated apogee and forming
elliptical orbits thus releasing centrifugal force.
Power Supply PS-2 is a regulated electrical source for inertial engines E-3 and E-6 with a variable 24 volts DC.
It was constructed by Steve in 1989 to deliver up to 4 amperes of
current or about 75 watts if needed. The above mentioned impulse
engines however, require much less power.
But what about the immutable laws of physics?
All of our engines behave somewhat like the mythical reactionless drive –
seemingly contradicting Newton’s 3rd law of motion (for every action, there’s
equal and opposite reaction). But as Steve puts it...
“Newton was a brilliant man, we all can agree on that. But he
did not elaborate a third derivative of motion in calculus because it was
considered inconsequential. And his third law applies only to conceptual systems
operating in one inertial frame with an assumed instantaneous reaction. However,
when working with real time systems using two or more inertial frames, we’ve
proven action and the subsequent reaction are conspicuously not simultaneous. A
good one-frame electromagnetic analogy is the rectification of alternating
current (AC) to direct current (DC) using a full-wave bridge rectifier: AC
doesn’t cancel out when rectified so work can be done with the pulsed DC – which
is unidirectional in nature: Though the system is inherently balanced, the
polarity on one-half the cycle can be reversed as long as it’s done within the
critical action time (CAT) of the system. Likewise, there is plenty of time to
rectify mechanical oscillators to produce a third derivative of rotary motion as
a repetitive source of surge (ĺ). In 1962, after doing extensive research on
surge and the Dean drive phenomenon, the physicist William O. Davis proposed an
amendment to Newton’s third law of motion:
The energy of a given
system can only be changed in some finite length of time, depending
on the system, and never in zero time.
“The laws of the Conservation of Momentum and Energy are also
upheld because the energy demands are of a pulsed, cyclic nature.”
The result of this “rectification” of mechanical oscillators
are impulses which can be used for hundreds of applications including recoilless
jackhammers, grav-lev fork lifts, portable skyhooks, spacesuit and satellite
drives, hovercraft levitation and most importantly, for a whole range of
new space craft propulsion systems. Such drives could one day help us mine
asteroids or even take humans on a Mars mission.
Steve's second Dean drive (6"x6"x4.25") built
in 1995. It is a 2.6 lb, single power source, university physics lab
demonstration model that can pull a 4.5 lb load (~2x its weight) at
˝“ per second using 13 watts – twenty times more efficient than
typical propulsion. This Dean Drive also rides on roller bearing wheels
and has a black-box cover with load sled. (See opening to "The Dean
Drive" next page.) Lessons learned: Increasing rotor mass decreases
carriage frequency; multiple cycles are needed to produce high
enough frequency and thrust to overcome inertia.
Just exactly how this thing works involves shifting time
bases and multiple inertial frames and Steve can explain it better than I. The
following pages will show you just how this revolutionary engine works. If
you’re really into the physics of it, Steve (a published author with Paladin
Press since 1987) has written another book entitled DEAN DRIVES AND DAVIS
MECHANICS, Inertial Propulsion and the Manipulation of Time in Symmetrical
Systems. See "Patent Secrets" at the end of this website for the e-book.
Inertial Engine E-9
Steve's “Herman Munster-mobile” is also not a Dean drive,
demonstrating the field of inertial propulsion is wide open for
innovative ideas. This space drive is a hybrid rotary-to-linear
system - a fusion of E-8’s shifters and the Henry Bull drive of 1935
where time can also be gained in positive phase. Built in 2007
this space drive (8.5"x5"x4") is a 3 lb. recoilless jackhammer drive controlled by an
electronic oscillator that will quietly and smoothly impel a load
twice its weight on level rails and roller bearing wheels using just
15 watts of electrical power. Patent applied for.
E-8 is a reciprocating impulse drive (RID). It's a compact system measuring just
12” x 12” x 24” and is constructed of stainless steel springs, rods, and
hardware throughout. Holding two pairs of 2 lb rod-rotors of solid brass, the
lightweight carriages are sky-blue anodized aluminum and heavy-duty fiberglass.
Black Delrin® platforms and white Delrin® gears ensure lightweight toughness. All
bushings are lightweight space-age iglide® thermo-plastic. It’s wired with military
grade colored-coded Teflon® insulated stranded wiring; solid-state switching with
optical-encoder cams controlling the four solid state relays (SSR's) and all panel lighting is done
with efficient LED's. Carriages and mainframe have ± acceleration sensors with
display and diagnostics on main panel. Built under Mil-Spec 454 soldering and
2000A quality standards, this modular spacecraft propulsion engine was designed for easy assembly and
disassembly for adjustments and transport.
(24"x12"x12") built by Steve in 1996
before he designed and installed the
revisions that finally made it work. Back then, though, it was a
monster. Once it fired up, it would stomp across the floor and set
the whole apartment building into vibration so we nicknamed it
"Frankenstein". I then suggested to Steve it just needed a little
white lithium grease. Afterward, it ran so much smoother - and
quieter - letting the neighbors sleep at night while we continued
our mad experiments.
Sale or licensing of this machine includes a rugged,
marine-grade, triple-coated polyurethane wooden instrument cabinet/shipping
crate with built-in dolly. This handsome lockbox securely holds the assembled
engine, its power supply, tether chains and engineering blueprints (with details
not delineated in the patent).
Dust particles on
the top-plate dance so fast they Levitate from centrifugal force of
the whirling elliptics.
For Your Protection and Ours
For Steve and I it has been a long uphill battle. The reason we took the bold
step of publishing this website was because of resistance from the scientific
community at large. We have applied for grants and have been turned down by a
dozen agencies twice over. We've been turned down by the best: NASA, the U.S.
Department of Defense (the Army, Air Force and the Navy), the National Institute
of Standards and Technology (NIST), and even the National Science Foundation
name a few. We received such encouraging replies as, and I quote one scientist
from NIST, "Motion cannot be produced without reaction against some form of
mass". unquote. And one scientist from the Defense Advanced Research Projects
Agency (DARPA) wrote back to us this insightful evaluation of our proposal "The
'Dean drive' has been around for 40 years, and has little merit". A staggering
observation. So we had to resort to building this new spacecraft propulsion
engine out of our own pockets.
Inertial engine E-8:
A "windless box kite" completed in 2006 and overhauled in
2014. See video above. Steve just wouldn't give up until it either worked or
completely flew apart. After solving a bunch of little problems and
many revisions, he finally got it running properly. When it was
all said and done, it weighed 40 lbs and while running on a bath
scale could reduce its weight to an unwavering 13 lbs. It’s very
efficient using under 150 watts of
(Note: All subassembly
positions depicted in this photograph are not proportionally
Now we want to show the world that this
new space craft propulsion system works and is available. If you are a prospective buyer of this
new spacecraft propulsion engine,
relax. Someone could no more build a working RID (or even a basic working Dean drive
for that matter) based on this site's illustrations
or video - then they could
build a working car from a magazine ad. If
you are a serious buyer please contact us. Requests from SERIOUSLY interested parties only
please. All other queries, comments
and suggestions are most welcome!
Vice President, Marketing
Centrifugĺl Dynamics Co.
Patents pending. All copyrights © are also reserved.
This website is
dedicated to the late
6, 1953 - May 6, 2013
May his contribution to the
science of inertial
propulsion not be forgotten.
For more on the
Father of Inertial Drive
Norman L. Dean with his 6-cycle
Endnotes / Bibliography
 Richard F. Dempewolff, Engine with
Built-in Wings, Popular Mechanics, Sept. 1961.
 United States Patents #2,886,976 in May 19, 1959 and #3,182,517 in May 11,
 John Campbell, Jr., The Space Drive Problem, Astounding Science Fact and
Fiction, June 1960, page 98.
 Thomas Valone, Ph.D., conversation with Steve and I at the Extraordinary
Science Symposium, International Tesla Society, Colorado Springs, CO, July 23,
 William O. Davis, Ph.D., The Fourth Law of Motion, Analog, May, 1962., pg
 From Dean Drives and Davis Mechanics, Inertial Propulsion and the
Manipulation of Time in Symmetrical Systems © 2007, 2011.
 Motors, solenoids and electronics for these engines were supplied by J.B.
Saunders Company., Boulder, Colorado. Visit
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