Información sobre el nuevo chasis Photon de TOP


1. Chassis Flex Isolation (CFI) – figure 1 (for rubber asphalt), figure 2 (for foam carpet)

Chassis flex can be adjusted independently in 3 different regions – front, rear, and center.

2. Low Center of Gravity (CG), Strong and Super Light Weight Chassis – figure 3

a. All structural components lay mostly on the main chassis. This minimizes material volume and mass above the main chassis, while at the same time optimizes overall rigidity without relying on the upper chassis to create strength. The result of this is a strong, low CG, light weight chassis.

b. Shock towers are mounted directly to the bulkhead, without the use of a bulkhead cover. This eliminates unnecessary parts and also lowers the Photon s CG.

3. Isotropic and Anisotropic Flex Material (IFM & AFM)

The Photon uses anisotropic flex material for rubber racing and isotropic flex material for foam racing. This optimizes the required directional flex for both rubber and foam tire racing. Different chassis material for rubber and foam are not often offered by other manufacturers. Common practice has been to use the same material and simply make it thicker for high bite applications.

4. LiPo Mounting System (LiPoMS) – figure 4


a. The Photon is LiPo adaptable to the current LiPo maximum regulated size. It offers a unique mounting system which allows the user to fine tune the LiPo mounting position. There is NO need for aftermarket LiPo trays.


b. With the benefit of LiPo s light weight, Photon s LiPo mounting system provides a unique location which allows users to balance the car left and right with minimal total amount of added weight. This allows the weight required to meet regulation to be placed near the center line to make the CG as narrow as possible.


5. Design Specific Balancing Weight – figure 5 & 6


Photon offers various optional brass balancing weights specifically designed to fit in various locations on the chassis securely by screws and on the weight tray of the LiPoMS.







1. Low Friction Light Weight Diff. Pulleys


a. Diff Ball slots utilize a 3-point triangular design, namely triangular pulley slots (TPS). This minimizes weight and friction and at the same time allows reservoirs for differential grease to spin out gradually and lubricate the differential balls by centrifugal force during operation.

(figure 7)


b. The snap-on dust covers also serve as air vents and allow air to exhaust when the drive belt presses on the pulley. This minimizes air friction during high speed operation. (figure 8)

2. Ball Diff. Adjustments


a. Ball diff screw is 2.6mm thick and can be externally adjusted. (figure 9)


b. Ball diff tension linearity can be adjusted by the orientation of the spring cone washers, based on drivers preferences. (figure 10, 11, 12)


3. Low Friction, Light Weight Composite Front Spool – figure 13


a. The front spool is light weight but is strengthened in the drive direction. Similar to the diff, there are air vents to minimize air friction.


b. The spool out drives are designed to maximize strength and minimize friction.

4. Diff height and belt tension Adjustability – figure 14


There are 19 belt tension and pulley height adjustments for fine tuning of application depending on suspension geometries.


5. Improved Symmetric Center Pulley (iSCP) – figure 15 & 16


a. Retained from the ARP/CFP, the Photon continues to use the race-proven light weight "symmetric center pulley" design.


b. The improved SCP, namely iSCP allows placement of the bearing inside the center pulley. This provides simplicity, allowing easy maintenance and height adjustability of the center pulleys.

6. Easy Pulley Maintenance – figure 17


Front and rear pulleys can be taken out for maintenance by unfastening 4 screws. The center pulley can be taken out by unfastening 2 screws.


7. Motor Mount Geometry – figure 18


With brushless motors in mind and more specifically smaller diameter spur gears. The motor mount allows the mounting of a wide range of gears that makes gearing more flexible.



1. Rear Suspension Design – figure 19 & 20


The unique rear hub/suspension arm is designed to improve impact resistance, especially for foam racing.


2. Reversible Suspension Arms – figure 21 & 22


Both front and rear suspension arms are reversible to allow fine tuning of shock mounting position. These arms were designed with strength, durability, adjustability, and performance in mind.

3. Suspension Pin Guard – figure 23 & 24


Most conventional touring cars use set screws to secure the outer suspension pins by directly screwing the set screw in a notch created on the pin. This exerts pressure on both the suspension pins and set screws. With the Photon s suspension pin guard design, there is no pressure or wearing on the pin and set screw while securely locking the suspension pins in place.

4. Off-Center Suspension Mount Insert – figure 25 & 26


Adjusting suspension mount height, tread width, and toe angle is usually troublesome and time-consuming. Photon offers fine tuning of suspension mount heights with the least amount of time and number of parts. The aluminum suspension inserts can be rotated 180 degrees to allow further fine tuning of roll centers. Coupled with 3 different suspension mounts, the user has an option of 6 hinge pin height locations at 0.5mm increments.


5. Stabilizer Bar – figure 27 & 28


Sway bar link height can be adjusted without removing the sway ball link.



1. Controlled Turbulence Shock Piston (CTSP) – figure 29 & 30


In most shocks, it’s difficult for users to assemble them with identical rebound. Photon s unique piston design controls turbulence and maximizes the amount of shock oil to flow through the piston holes instead of around the piston edge minimizing "blow by".

2. Suspension Spring Set – figure 31


There are 3 sets (X amount of pairs total) of optional suspension springs – foam front, foam rear and rubber, specially designed to target to their specific applications.



1. Linear Ackerman (LA) – figure 34


Photon steering crank allows 3 forward/rearward adjustment positions for the steering pivot balls.

2. Radial Ackerman (RA) – figure of different inserts figure 34


Photon also allows radial adjustment of the pivot ball positions by using easily removable inserts. A total of 4 positions are available from 8mm to 12mm apart in 1mm increments.

The combination of linear and radial ackerman gives a total of 12 steering geometries from the steering crank alone. It also allows the change of ackerman without the change of steering link length.




1. 5.3mm Ball Studs and Ball Cups


This is the optimal and unconventional size to be used with all linkage including camber link, steering, stabilizer and shock mounting. (See maintenance)

2. Threaded Through-Hole Ball Studs – figure 35


Photon uses threaded ball studs to optimize between weight and strength, especially when optional alloy ball studs are used.


3. Ball Stud and Ball Cup Design – figure 36, 37


The ball stud and the through-hole ball cup design with 3.0mm hex slot to allow easy removal of shocks, steering and camber link without wearing out tapping holes on plastics and without snapping of ball cups.

4. Tie Rods


All tie rods are 30mm in length, reducing the amount of spares needed. The various linkages utilize ball cups of different lengths to achieve the required lengths.

Our results have shown that a larger diameter ball stud and cup resulted in better manufacturing tolerances. The result is a smoother operating ball and socket joint.



The 4 bulkheads of the Photon are all identical, so they can be interchanged for maintenance. This minimizes the number of spare parts to be kept in the inventory.


Front and rear pulleys can be taken out for maintenance by unfastening 4 screws. The center pulley can be taken out by unfastening 2 screws. – figure 17


The snap-on dust covers keeps the dirt out which increases number of runs between diff maintenance. – figure 8


The differential can be adjusted externally. – figure 9


Photon has a much larger setup window than ARP/CFP, in terms of suspension geometry, tread width/length, and shock mounting positions. This will help optimize both foam and rubber racing.


All Suspension parts including suspension arms, castor blocks, universals, steering/rear hubs and shocks can be installed in T.O.P. s previous touring cars, ARP and CFP.


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