a real - size , simulated dragster race includes an essentially oval raceway with two side - by - side parallel acceleration strips as best shown in fig1 and 2 . left 1 and right 1 ′ simulated dragsters are located on left 2 and right 2 ′ parallel tracks . the race runs for approximately ⅛ of a mile from start to finish . at the starting line is a signal tower 3 . this starting line signal tower has a number of lights such as are usually found in a real life drag race . the lights include a set of green lights to signal “ go ”, a set of red lights to signal “ finish ” and an electronic readout to signify the winner and the speeds at which each simulated dragster proceeded down the track . different light systems can be used in practicing this invention . each dragster has an upper , pivotable top 4 . this pivotable top 4 moves upwardly ( as shown in fig1 ) to allow passengers to enter the vehicle . the dragster top 4 is then closed ( as shown in fig3 ) for the duration of the ride . the entire simulated dragstrip ride consists of an essentially oval course as best shown in fig2 . the main part of the oval course includes an unloading area 5 , an instructional area 6 and a loading area 7 . these particular areas are used to unload passengers , to instruct passengers on the proper operation of the ride and an area in which passengers may be loaded . after the passengers are loaded in area 7 , the ride is commenced . one passenger in each vehicle is allowed to control the take off of the dragster . the take off is commenced by the traditional signal tower lights at the starting line of the track . acceleration starts with a push of the accelerator pedal by the driver of the simulated dragster . simulated shifting is accomplished by a push button also operated by the driver . the dragster is accelerated for approximately 185 feet in an acceleration area 8 . each dragster may accelerate to approximately 125 miles per hour , during which each driver and passenger would experience a force reaching approximately 3 . 5 to 4 . 5 gs . once each dragster has accelerated through the acceleration area 8 , the dragsters enter a coasting area 9 ( approximately 260 feet ) and a braking area 10 ( approximately 260 feet ). in the braking area , the dragster is automatically braked through means to be described later . the total length of the drag race from the loading area to the finish line is approximately ⅛ of a mile . when the ride is finished , each simulated dragster slowly moves through the curved area and back onto the return tracks 11 . a middle maintenance track 12 is also provided for maintenance of the vehicle if desired . once the dragsters return to the unloading area 5 , passengers are unloaded and the ride is completed . in order to closely simulate a real life drag race , dragsters or “ funny car ” designs are adopted . one such design is best shown in fig3 . it is to be noted that the dragsters themselves may take on any design desirable , from drag race type cars to stock cars , to indy cars . a typical dragster design would include a front , upper body 13 and a rear body 14 . the rear body 14 may be raised in order for riders to enter the car at the loading area 7 . however , when the car is in motion , the rear 14 of the body is in its closed and secured position as best shown in fig3 . to simulate an actual dragster , a cowl 15 and a spoiler 16 may also be incorporated into the outer appearance of the dragster . the simulated portion of the dragster is completed with the addition of simulated track wheels 17 , as shown in fig3 and 4 . these simulated track wheels actually contact the track and may visually be observed by the driver and spectators of the simulated drag race . the front 13 and rear 14 portions of the outer body of one embodiment of the dragster are supported by frame supports 18 , as best shown in fig4 . these frame supports 18 are preferably made of a strong yet lightweight metal . the dragster body itself may be made of fiberglass using a biaxial cloth with a modified vinyl ester resin . this fiberglass body and frame insures a lightweight dragster with superior strength . although the observer is able to see only the simulated track wheels 17 , the vehicle actually rides on actual rubber or metal wheels 19 and 19 ′ ( fig4 and 12 ) or casters 33 and 33 ′ ( fig8 - 11 ). in the preferred embodiment , a set of front wheels 19 and 19 ′ and a set of rear wheels support the weight of the dragster as it moves down the track . as shown in fig5 a number of unique safety features are incorporated into this particular ride in order to insure the safety of the driver and passenger of the simulated dragstrip race . these safety features include an adjustable helmet 20 . this adjustable helmet has a vertical adjustment member 21 and a horizontal adjustment member 22 . these adjustment members allow the attendant of the ride to adjust the helmet of the driver or passenger of the dragster according to his or her particular size . in addition , an adjustable seat 23 moves upward and forward , depending on the size of the driver or passenger . finally , a safety seat harness 24 is provided for both the driver and the passenger of this dragstrip ride . in normal amusement rides , a simple padded bar around the rider &# 39 ; s waist would be utilized to keep the passenger in the ride . however , due to the special considerations in constructing a simulated dragstrip race , a safety harness is incorporated into the overall design of the device . the race begins when the starting line signal tower flashes green for “ go ”. at that point , each of the two side - by - side dragster drivers will push the acceleration pedal 25 . in real life this acceleration pedal feeds gasoline to the carburetor or fuel injectors of the engine . in this simulated ride , the acceleration pedal gives a signal to the linear induction motor , or other drive means to begin the race . a brake pedal ( not shown on the drawing figures ) is also provided to brake the vehicle should such a procedure be necessary . the dash panel of the vehicle also includes a steering wheel 26 . although the steering wheel is included for purposes of making the ride realistic , the vehicle actually rides on a straight and clearly defined track . while no steering of the vehicle is actually necessary or desirable , the presence of the steering wheel is used to enhance the realism of the device . however , a shift button 27 is present on the instrument panel , as best shown in fig6 . this shift button simulates the actual shifting done in a dragster in real life . using the linear induction motor means of accelerating the vehicle , simulating shifting can be readily incorporated as a feature of this ride . such a simulated shifting is described later . as previously noted , the dragster itself rides on actual wheels 19 and 19 ′, which are hidden from the view of the spectators or riders of the vehicle . however , in order to provide a realistic depiction of the actual ride , simulated wheels 17 are provide on the front and rear of the vehicle . these simulated wheels 17 are held in contact with the upper track surface 39 by means of a wheel strut bracket 28 and a wheel strut spring 30 . this bracket and spring bias the simulated wheel strut 29 downwardly towards the track surface 39 , as best shown in fig7 . each left and right front and rear simulated wheel 17 has such a spring mechanism . turning now to the linear track design , fig8 and 9 show two such above track embodiments . [ 0035 ] fig8 shows the basic concrete track 31 . this concrete track 31 is normally comprised of concrete reinforced with approximately ½ inch rebar , as shown . inside the simulated wheels 17 and underneath the dragster frame lower base 35 are side - by - side steel channel guide systems . these guide systems include a left channel 32 and a right channel 32 ′. these channels are generally c - shaped as shown , and face each other as illustrated in fig8 . the dragster frame lower base 35 is connected to an actual axle 34 ′ by a dragster lower base frame - actual wheel connection column 43 . the lower base frame 35 thus rides on the actual axle 34 ′. the actual axle 34 ′ is connected to a series of casters , as best shown in fig8 , 10 and 10 a . a left actual caster wheel 33 and a right actual caster wheel 33 ′ are located vertically . although the axle 34 ′ does not turn , the caster wheels 33 and 33 ′ do turn . the vehicle itself is accelerated in the preferred embodiment by a linear induction motor 36 . while the actual axle 34 ′ supports the weight of the vehicle and passengers , a simulated axle 34 ( as shown in fig7 and 11 ) connects the left and right simulated wheels . however , as previously noted , these wheels are simulated wheels only and do not actually operate to move or drive the vehicle forward . turning to fig1 , the linear induction motor 36 and 36 ′ is shown in one embodiment . this linear induction motor 36 and 36 ′ creates a magnetic field in a reaction plate 37 that propels the vehicle down the track through the acceleration zone 8 . in order to understand the acceleration means of the preferred embodiment , a brief discussion of electromotive accelerating means would be beneficial . rotary induction motors , often referred to as “ squirrel cage motors ,” were invented decades ago . their usage is now widespread . the compressor motor used in a typical refrigerator is an example of a squirrel cage motor . electromagnetic induction , the principle by which linear induction motors function , was discovered about 250 years ago by michael faraday . further experiments by pioneers in this field such as linz vastly increased the understanding of this phenomenon . electromagnetism functions within an induction motor when a current is passed through wire coiled around a conductive core ( referred to as a motor ). when a current is passed through such a coiled wire , the core produces a magnetic field . the direction of this field is dependent upon the direction of the current . the strength of the field is dependent upon the number of windings in the coil as well as the strength of the current . if a non - ferrous , conductive metal ( referred to as a “ reaction plate ”) is introduced into this magnetic field and there is relative motion between the field and the conductor , a current is induced in the conductor . this is known as electromagnetic induction . the induced current will flow within the conductor in a coil - like pattern , thus producing a secondary magnetic field , with the conductor as its core . it is the interaction between these two magnetic fields that creates motion . a linear induction motor consists of one top 36 and one bottom 36 ′ of a motor bolted into a housing . there is a small air gap ( approximately 18 mm in this application ) in which the magnetic field produced by the motors is contained . the reaction plate 37 is an aluminum fin attached to the vehicle , as shown in fig1 . when current is supplied to motors 36 and 36 ′, the windings of the motors produce a magnetic field which “ appears ” to be traveling forward . a second magnetic field is subsequently produced in the reaction plate , and this magnetic field ( and hence the reaction plate and drag strip car ) attempts to “ catch up to ” the first field . this effect is similar to moving one magnet on top of a table by using a second magnet on the bottom of the table . the setup of the windings within the motors greatly effects how the reaction plate behaves . each setup is dependent upon the estimated speed of the car as it passes through the respective lim . this system is similar to gears in a transmission . since the system is similar to gears in a transmission , the shift button 27 can simulate the shifting of gears in a dragster . a series of lims are utilized in this particular invention to create a launch time of the dragster through the acceleration area 8 . the actual energy inputs , number of lims and lim assemblies , launch amps and launch volts , as well as programmable launching controller systems are well known in the art and may be adapted to this particular dragstrip race by someone with ordinary skill in the art . however , the use of a lim to propel a dragstrip ride for sudden acceleration such as this is new and unique to the amusement ride industry . it is to be noted that the programmable launching controller system continually monitors the position and velocity of each dragster vehicle as it travels along the acceleration area 8 . each lim is switched on just before the vehicle enters and is switched off just after the vehicle exits . once the vehicle reaches the required speed , ( a maximum of approximately 125 miles per hour ) all lims are switched off . the dragster vehicle then coasts through coasting area 9 and into braking area 10 . the dragster is braked by means of magnetic brakes and a redundant mechanical brake system on the vehicle . the mechanical footbrake also shuts down all lims . the lim housings used are designed and fabricated to very strict tolerances . the power to each pair of lim is channeled through dedicated control panels having individual control panels and redundant fuses . each lim has three internal thermal protection circuits that will disrupt the power to the motor if it overheats . returning now to fig1 , the operation of the vehicle in its preferred embodiment can be readily ascertained . the vehicle itself has upper frame supports 18 attached to the front 13 and rear 14 of the dragster bodies . the frame 18 is attached to left 19 and right 19 ′ actual wheels , which ride along in a predetermined track . the left 19 and right 19 ′ actual wheels are attached to the lower frame base 35 through the dragster lower base frame - actual wheel connection column 43 , as shown on fig1 . the actual wheels ride in troughs 44 . in addition to the guide troughs 44 a lim trough 38 is also provided . this lim trough 38 houses the linear induction motor utilized to accelerate the dragster as described above . while the simulated wheels 17 ride on the track surface 39 , the actual dragster 1 rides on the actual wheels 19 . the wheels 19 are accelerated by the linear induction motor 36 and 36 ′ and the reaction plate 37 . one embodiment of this invention is best shown in fig1 . however , the below surface embodiment shown in fig1 could be modified such that the actual wheel trough upon which the dragster vehicle 1 rides is above the ground , as shown in fig8 and 9 . in another embodiment , shown in fig9 the c - shaped steel channeled guide system 32 shown in fig8 is replaced with a guide system that includes a left side rail or pipe 40 and a right side rail or pipe 40 ′. these left and right circular side rails would be attached in the center of and underneath the dragster 1 , as shown . these side rails would be attached to left and right inner walls . however , in order to keep the dragster 1 on its correct path , horizontal 41 and vertical 42 restraining casters would be attached to the dragster frame lower base 35 . these restraining casters 41 and 42 are best shown in fig1 and 10 a . as shown in fig1 and 10 a , the horizontal 41 and vertical 42 restraining casters are attached alternately to the dragster frame lower base 35 . the horizontal restraining casters 41 would keep the dragster vehicle 1 from moving sideways along the linear track . the vertical restraining casters 42 would keep the vehicle from moving up and down in a vertical direction along the track . the side rails and horizontal and vertical casters would be a modification of the steel - channeled guide system 32 as shown in fig8 . one final alternate embodiment of the guide system for the dragster ride is shown in fig1 . in this embodiment , the dragster frame lower base 35 is connected to the actual wheel axle 34 ′ by the dragster lower base frame - actual wheel connection column 43 as shown . the linear induction motor system shown at 36 would drive the vehicle as previously noted . however , in this embodiment , the horizontal 41 and vertical 42 restraining casters would be driven along below - surface steel channel guides , as shown . these below surface steel channel guides 45 and 45 ′ are similar to the steel channel guides 32 and 32 ′ shown in fig8 . the dragster 1 also has simulated exhaust smoke , which would be coordinated with the movement of the acceleration pedal by the driver of the vehicle . in addition , the acceleration pedal could be connected and coordinated with real sounds of a drag race through a sound system . the simulated sounds and vibrations of a real drag race are simulated through speakers in each driver &# 39 ; s and passenger &# 39 ; s helmet . it is to be appreciated that this device is new and novel as a general concept with respect to amusement rides . both the creation of the actual physical and visual sensations involved in this drag strip ride , as well as the numerous innovations required to make such a ride safe and realistic have not heretofore been disclosed by any known devices . however , the actual embodiment of this device is meant as a means of illustration only . minor variations of the appearance of the device , the location and shape of the track , as well as the drive mechanisms is still within the keeping and spirit of this invention . for example , the racetrack could be ¼ mile or longer . further , for very short rides , the linear induction motor system of propelling the vehicle could be replaced by a simple bungee cord type of propulsion system , by a spring mechanism , or by pneumatic or air powered drivers . however , the preferred embodiment of this invention includes the linear induction means of propulsion as previously set out .
a real - size simulated drag strip ride is presented which recreates the physical and visual sensations of a drag race . a real - size dragster is located along a specified and controlled linear track . the rider is positioned inside the driver &# 39 ; s compartment , with a specially adjustable safety helmet and full safety harness securing him in place in an adjustable seat . once the simulated light tower signals that the dragster is set to race , each driver of two , side - by - side vehicles , may push the acceleration pedal to accelerate the vehicle through an initial acceleration zone . the dragsters are propelled by use of a linear induction motor and fin located out of sight underneath the vehicle . the race is finished when the cars pass the finish line . speeds and the winner are displayed on the starting line tower . the cars are then returned to the loading and unloading area for the next riders .