Need For Speed Carbon Collectors Edition Unterschied
Tommye Hope
Development priorities were to improve on the already exceptional aerodynamic characteristics and the strength and stiffness of the previous generation Peak 4550. To create the next evolution of a wheelset that is light, responsive, and fast accelerating for the climbs. On the descents, a wheelset that is predictable and sharp handling. And in the valleys, a wheelset that is aerodynamic and impervious to crosswinds.
Internal rim width has been increased to 21mm internal (28.2mm external) while rim weight has been reduced to 420g. Stiffness and balance increase, thanks to our patented Radially Staggered Lacing, and aerodynamic efficiency increases as well.
Peak 4550 Evolution will continue to have a hooked, hole-less, tubeless ready tire bed, which can accommodate clincher/tubed tires or tubeless tires with no tape needed and no tire pressure restrictions. Competing hookless rims, while less expensive to manufacture and lighter weight, have proven problematic and potentially dangerous, especially in relation to tire choices and tire pressure limits. Princeton CarbonWorks still firmly believes in a hooked rim providing the safest and fastest solution for road riding and racing.
Development priorities were to improve on the already exceptional aerodynamic characteristics and the strength and stiffness of the previous generation Peak 4550. The next evolution of a wheelset that is light, responsive, and fast accelerating for the climbs. On the descents, a wheelset that is predictable and sharp handling. And in the valleys, a wheelset that is aerodynamic and impervious to crosswinds.
I recently had the pleasure of using the Princeton CarbonWorks Peak 4550 wheelset with Hope hubs, and I must say, it has exceeded my expectations in every aspect. These wheels are an absolute game-changer for any cyclist seeking a high-performance and reliable option. Allow me to share my positive experience with this exceptional product.
First and foremost, the Princeton CarbonWorks Peak 4550 wheelset offers an impeccable blend of lightweight construction and remarkable stability, even in challenging conditions such as crosswinds. As a cyclist, I appreciate how crucial it is to have confidence in my equipment, and these wheels deliver just that. The aerodynamic design, combined with the carbon fiber construction, ensures a smooth and efficient ride, allowing me to maintain speed with ease.
Purchasing them in Germany was not easy and a pain in the b*** to buy with import sales tax! But worth
I bought these wheels as part of a new bike build. I also have a set of Lightweight Meilenstein and Enve 4.5s. All things considered, the 4550s are much better all around-wheels. They roll nicer and are more stable in crosswinds. I highly recommend these wheels.
Wow! These wheels are great and I am not going to hesitate and I am ordering some Duals for one of my other bikes. These wheels never stop rolling and I feel like I am being pulled down the road. Marty is great to deal with and very responsive with any and all questions that I had.
Wheels are as advertised. Fast, light and seemingly impervious to cross winds. Only a handful of rides (rim brake set w/ Carbon Ti hubs), but I can already feel the magic. Looking forward to more rides. Team has been super responsive from a customer service perspective. Definitely getting another set on my next build. And they look amazing!
I picked up a set of Peak 4550s (Carbon Ti) after riding for about 6 months on the Wakes 6560s. I have been able to put about 1500 miles on them and they are my preferred wheelset. They are easier to handle in winds and generally more agile. The trade off is about 5-15 watts of drag in the 18-25mph range. In similar rides with similar power output my average speeds are in the range of 0.2 to 0.5 mph less. Though, in rides with long climbs and descents, the difference in average speed is less. My Strava times have also been better on descents with the Peaks. They are easier to handle at speed, especially with swirling winds.
If trying to decide between the two, I recommend the Wakes if predominantly riding on flats and high wind (swirling or gusting) is typically not a factor. For more varied terrain, especially with larger climbs and technical descents, the Peaks are a better choice. Either way the wheels have a ride quality that sets them apart from other brands. I highly recommend both.
The enhanced prowess of the LFA Nrburgring edition around the track was largely as a result of improved aerodynamic enhancements that significantly increased downforce at high speed, which was essential for peak performance. The same carbon fibre reinforced plastic (CFRP) material that was so instrumental in the construction of the LFA was used in the forming of attractive but highly functional aerodynamic components.
These included a larger front chin spoiler that created a sharper division between the air being directed under and over the car. Its upward curvature into corner winglets not only generated downforce to improve grip and steering feel across the front axle but helped to channel the air more cleanly down the sides of the vehicle. Canards enhanced these functions in the same way that a bi-plane generates more lift and greater manuverability than a monoplane aircraft.
In addition to being equipped with Bridgestone Potenza RE070 extreme performance road tyres and lightweight mesh-style forged alloy wheels, the LFA Nrburgring edition was set 10mm lower through the fitment of sport-tuned suspension, which reduced drag and generated downforce through natural ground effect. Nevertheless, this relatively small measure was not enough to overcome the additional drag of the aerodynamic enhancements combined.
While the choice of exterior colour was almost limitless for standard Lexus LFA buyers, those specifying the Nrburgring package were limited to four colour options: matt black, black, white or orange. These were complimented by a choice of three interior colour schemes: black and red, black and purple, and all-black. Whatever the visual combination, all Nrburgring editions featured a CFRP centre console and door cards, while the CFRP bucket seats were trimmed in slip-resistant Alcantara rather than leather.
For motor applications, engineers have several options at their disposal. Typically, engineers can choose between direct-current (DC) or alternating-current (AC) motors. Machine Design has covered the difference between basic types of motors in the past.
The latest types of motors to enter the fray are those that help control the energy output and achieve higher energy efficiency. These electronically communicated (EC) motors are making strides in replacing dc and ac motors; especially with the need to achieve energy-efficiency regulations.
DC motors rely on carbon brushes and a commutation ring to switch the direction of the current and magnetic field polarity in a rotating armature. This interaction between the internal rotor and fixed permanent magnets induces the rotation of the motor.
According to maxon motors, DC motors are limited by their brush system and have a lifespan of 1000-1500 hours; less than 100 hours if under extreme loads. Some motors may operate to 15,000 hours under favorable operating conditions. The high speed of rotation is only limited by commutation, typically achieving up to approximately 10,000 rotations per minute.
AC induction motors use a series of coils powered and controlled by AC input voltage. The stator field is created from the input voltage, and the rotor field is induced by the stator field. The other type of AC motor is a synchronous motor that is able to operate with precision supply frequency. The magnetic field is generated by a current delivered through slip rings or a permanent magnet. They run faster than induction motors due to the fact that the speed is reduced by the slip of the asynchronous motor.
The ac motors are meant to operate a specific point on a performance curve. This curve coincides with the peak efficiency of the motor. Outside of this point, the efficiency of the motor drops significantly. AC motors consume additional energy to create a magnetic field by inducing a current on the rotor. Consequently, AC motors are less efficient than DC motors. In fact, the DC motor is 30% more efficient than AC motors due to the secondary magnetic field being generated from the permanent magnets rather than copper windings.
EC motors have several benefits. Because EC motors have no brushes, they do not spark or have a short life due to brushes. Other advantages include the fact that they do not waste power because the electronics control the stator; they provide better performance and controllability, and they run cooler than induction motors. In terms of size, small motors can achieve the same output as traditional DC or AC motors. Furthermore, the smaller motor saves space, and when the manufacturer uses an external rotor rather than a shaft motor, even more space savings are possible.
When comparing efficiency of an EC motor to an AC shaded pole motor or an AC permanent-split capacitor motor, shaded pole motors have an efficiency range of 15 to 25%, permanent-split capacitors (PSC) range from 30 to 50%, and EC motors have an efficiency of 60 to 75%. In a report from the Department of Energy in 2013, EC motors were found to be the most efficient upgrade option for current motor applications.
EC motors can be found in lower power output applications (e.g., small fans, servomotors, and motion-control systems). They are also finding their way into several small appliances with high power output needs, including conveyor belts and condenser units.
In terms of controlling speed, EC motors have multiple speed controls as a standard option. AC motors, for example, are available at multiple speeds with an optional external speed controller. The external controller adjusts the incoming voltage for AC motors, which alters their sine wave and in turn taxes the motor lifetime and increases noise.
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