Dean Drive
Impulse Engine
Patent Secrets




Inertial propulsion engine E-6 (1995) New Spacecraft Propulsion Engine


Inertial Engine E-6   E-13 PATENT PENDING



New 8 lb. Spacecraft Engine with a 2.2 g acceleration generates over 15 lbs. peak impulse using just 17 watts - all from centrifugal force.

Steven M. Hampton, Inventor                    Glen A. Robertson, Consultant

Fuel-less and 100% Electric


E-13 Front

E-13 Back

Electric Powered, Closed System In-Space Propulsion


Up-scaled from a smaller proto-type E-6 (above left), and 25 years in development, inertial engine E-13 is a single-cycle, 3.7 Hz impulse drive. It weighs just 8 lbs. and propels with 2.2 g impulse without ejecting mass.





Power Supply PS-5

PS-5 Inside


A Functional Dean Space Drive

Patent Abstract:
Electric In-Space propulsion uses no fuel. Thrust is generated as impulses where in space, momentum is additive. Rotary motion is converted into bi-linear oscillation of a carriage then its momentum rectified: The carriage is shifted forward during low inertia, so momentum used to oscillate the carriage forward is conserved to be used later in the cycle. Reverse carriage oscillations are deflected. This creates only a pulsed demand on the electric power supply – thus too fulfilling the law of Conservation of Energy. Newton’s third law of motion is upheld because action and reaction are not simultaneous events, so in this engine, the inertial delay occurs at post carriage shift during part of the rotors’ orbit – when centrifugal force emerges: The
centripetal force of the rotors are cyclically nullified by the shift, resulting in surges of centrifugal force. (Patent Abstract)


This engine is up-scalable and has been duplicated (E-13B and sister drive E-13A)




TeraTerm Arduino Accelerometer Test
g force (divide by 70)  Engine free-hanging
Courtesy of Glen A. Robertson, BS in Physics, BS in Mathematics, MS in Operations Research





Maximum impulse

With Arduino accelerometer



Silent mode

Arduino and analog accelerometers



Inertial Space Drive: 8 lb. centrifugal force engine accelerates 2.2g with 15 lb. surge propulsion.




R2_Stevens Arduino Load Cell Test
Force in lbs.  t = x 1ms (Freq = 3.7 Hz)  Engine secured to bench
Courtesy of Glen A. Robertson, BS in Physics, BS in Mathematics, MS in Operations Research




Load cell firmly attached to engine and mounting plate, then anchored to test bench

20 lb. peak -5 lb. = 15 lb. average impulse




 Physics Lab Assistant* Accelerometer Test
g force (Green Trace) for one cycle 440ms (engine free-hanging)

Courtesy of Glen A. Robertson, BS in Physics, BS in Mathematics, MS in Operations Research


(Traces other than green are null as the accelerometer was mounted on side of engine in this test. Red trace was the unsecured load cell.)

New Inertial Dampener Installed:

~ Accelerometer Tests ~

g force

Baseline - Engine OFF (Load cell not mounted in these tests)


Engine ON at 9.50 vdc - Dampener ON


Engine ON at 11.25 vdc - Dampener ON


  Physics Lab Assistant* Load Cell Test
lbs. of force (Red Trace) one cycle 440ms (engine secured to bench)

Courtesy of Glen A. Robertson, BS in Physics, BS in Mathematics, MS in Operations Research



Cycle time: 440ms (Rotor voltage reduced to 8.0 vdc for waveform clarity)


First positive spike for 20ms with 13.5 lbs. force, is the result of the solenoid firing, the mainframe responds according to Newtons 3rd law and gives a short negative recoil spike 15ms. (This 35ms event accounts for 8% of the cycle of which 20ms comprises a positive impulse)

Second positive pulse, with the carriage now locked in the forward position by the solenoid, the rotors are imparting acceleration onto the mainframe for 60ms. At their completion, a total cycle time of 95ms has passed. Here with 8 lbs. force. (This event accounts for about 22% of the cycle with 60ms of it as a positive impulse)


Next, the ringing of the carriage, released from the solenoid, dampens out 140ms. (This inertial lag of 140ms accounts for 32% of cycle)

Third positive pulse the mainframe responds for 100ms as an aftershock from the rotors centrifugal force. Dr. Davis’s mythical “virtual energy” ?  Here with 5 lbs. force. (This event accounts for 23% of the cycle with 100ms positive impulse)

The mainframe itself dampens out with 40ms of ringing and the fourth positive pulse for 50ms is possibly an inertial aftershock from the third positive pulse - a 5th derivative force ?  Here with 2 lbs. force. (This event accounts for about 15% of the cycle with 50ms positive impulse. TOTAL POSITIVE Impulse per cycle = 230ms or 52% of the cycle.)


TWO of these engines have been built and tested:

- Additional Load Cell Results -

E-13B at 3 Hz


E-13A at 3 Hz


E-13A and E-13B yoked at 4 Hz


Testing apparatus devised by Glen used for the above set of experiments …






E-13 is a compact power-plant measuring just 5” x 11” x 14” and is engineered with 4 brass support rods joining an aircraft-grade aluminum thrust plate to a tough, lightweight Delrin® (acetal) base plate. This frame also supports 2 stainless steel glide rods. The thrust plate holds the solenoid shifter with associated electrical components, military grade power connector, terminal blocks and brass handles.

The engine is held together with stainless-steel fasteners – some hardware is silicon-bronze for accent. A pair of 9.5 oz rotors of solid bronze are mounted on tough, lightweight aluminum gears journaled through the carriage plate also of aircraft-grade aluminum. All bushings are lightweight space-age iglide® thermo-plastic. It’s wired with military-grade colored-coded low-friction Teflon® insulated strand wiring. Timing is governed by an optical-encoder controlling a solid-state relay (SSR) and panel lighting is done with efficient LED's all mounted on the carriage plate. The electronics are protected with 3 different back-EMF surge cancellation circuits.

Built under Mil-Spec 454 soldering and 2000A quality standards, this modular spacecraft propulsion engine was designed for easy assembly and disassembly for adjustments, transport and up-scalability.


Impulse Drive DEMO



~ Extremely Efficient ~

Average Power Consumption:

           Shifter = 24 VDC x 1.67 A = 40 w @ 25% duty cycle = 10 watts

           Rotors = 8.85 VDC x .9 A = 8 watts

           Total power consumption to get 14 to 20 lbs. impulse is just 18 watts avg. or about …

1 watt ≈ 1 lb. force

PATENT PENDING - contact us for more information.


Contact Information:


Glen A. Robertson –  gar7102@live.com




Steven M. Hampton –  thrust@centurylink.net



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© 2021 Centrifugål Dynamics


© Steven M. Hampton, Centrifugål Dynamics Co. 2020

© Glen A. Robertson, Exotic Propulsion 2020

*LabVIEW Applications: Physics Lab Assistant, © Doug Harper



This site was last updated: 09/14/2021

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