Reflex Racing RX28K/RX28 Initial Impressions (
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- čas přidán 25. 08. 2024
- As you can see from my recent video, I've been getting more and more into 1:28 scale track cars. I recently picked up this RX28K pan car chassis by Reflex Racing. This is the state of the art for this scale. I bought it used from a trusted seller at an amazing price! It comes with the chassis itself with the KISS frontend, A06CLS servo, brass lower pod plate, and Jomurema bumper. Today, this 98mm RWD pan car competes against cars from GL, Atomic, RTRC, PN, and Nexx.
One particularly interesting feature of this RX28K is the KISS frontend, which stands of "Keep It Simple, Stupid". The regular RX28 is a double wishbone design, but RX28K uses a much simpler MacPherson strut design. In theory, it trades off the full range of adjustability offered by a DWS geometry, but it's supposedly to be easier to tune. In practice, it's actually doing really well in top level races! Atomic is introducing a similar design with their new MRZ-SF.
The rear uses the tried-and-true tri-damper suspension setup. Supporting the rear wheels is a carbide ball differential (allows 14mm wheels). The chassis is full of aluminum parts. The entire frontend, knuckles, motor pod, etc. The chassis plate is brass. Cristian Tabush, the owner/designer of Reflex Racing, wanted RX28 to be race-ready out of the box without needing option parts. To be honest, that's awesome. There's no need to mess with all the basic components that are likely to be upgraded anyway.
One thing to note is that RX28 is not 100% compatible with autoscale bodies. Its side clip mounts are a bit more forward.
RX28 is also not equipped with any servo saver. The design of the steering system is extremely direct. Yes, the servo isn't protected, but in return there's very little play. A wide bumper is recommended.
Let's compare quickly with the GLR, which dominated the scene when it was released 5 years ago. GLR also uses the pan car tri-damper rear suspension setup. The front is a single wishbone setup. But fast forwarding 5 years of development, it's clear that everything on the RX28 sits even lower. When I first saw the roller chassis, immediately I noticed how the whole rear suspension was much lower than GLR or GLR-GT. What will 1:28 track cars look like 5 years from now? It's so exciting because many manufacturers are competing against each other to build the fastest car.
So what's my plan for this RX28K? I'm going to put in an GL 3500kv motor and ESC, plus a Jomurema body to start. This means building an RX28-specific body because of the different side clip mounting position. In addition to the hard body, I'm also going to prepare the Protoform P63 lexan body. Let's hope there's upcoming track time soon!
This is Sammy and thanks for watching!
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Thnx for this video again sammy!
Thank you!
I‘ve seen the car in action at the Race in prague. Amazing Drive. It is on my wishlist but at the moment i am testing the RTA and the MRZ - also fantastic Cars.
RTA and MRZ are both great cars with great results! I would love to drive those too but I already have too many cars and not enough track time.
I just built my new Atomic MRZ SF last night. Wish I had the Reflex to compare it against.
If you ever pick up the simple front end competitors would be cool to see you talk about differences, handling, etc.
Oh that's so nice! The MRZ-SF looks really good and the price is very nice. I'm not sure if I will be getting another rwd so soon though but if I come across one I will definitely be checking it out. MRZ is interesting that it puts the servo between the front wheels. That's different from all the other rwd chassis out there.
It's a sliding pillar suspension system, not a macpherson strut
You are right! My mistake.
That’s a well built car, it belonged to a team driver. I can guarantee it is assembled properly. 😝
Thanks for giving me a good deal! The car is indeed a great build! I appreciate details like the dust guards on the side dampers. Last night I was able to play tetris with this and laid out electronics on the chassis. That was a fun exercise!
I have been building chassis in 1/28 scale since 2007. I would never have thought to fit a Servo without saver in this scale. Especially at the speeds that today's models have. That servo will suffer enormously. In contrast, using a quality saver, a cheap Futaba S3114 servo with plastic gears lasted me several racing seasons. Without a saver, it was not a problem to destroy even a fairly robust servo with metal gears. If the teeth were not damaged, then the plastic housing of the servo was damaged. But I admit that an all-metal servo might be able to withstand it. But I no tested this.
Thanks for sharing your experience. All my other chassis so far came with servo savers as well so this is new to me. This was an explicit design decision with RX28. Because of this, users have run into more breakages with the front arms and servo. To remedy this, RX28 usually runs with a wide bumper (both hard body and especially lexan) and minimum front wheel offsets. The a06cls servo shown here has titanium servo gears (and people can buy a replacement gears kit) so it should help as well. I will find out how the car fares in practice.
@@sammybaka My experience with servos without a saver is not good. although I'm currently working on a chassis project in 1/43 and 1/32 scale where I don't have a saver. In the 1/43 models, I have a high-quality bluebird servo with metal gears, and considering the weight of the whole model is only 35 grams, I have not found any complications so far. However, I struggled yesterday during the tests in the 1/32 scale chassis. The model weighs 130 grams and the servo suffers a lot. After not too long, the model started to lose neutral. I found out that the plastic body of the servo cracked even though the metal gears held up. I'll probably make a saver there. If the saver is precisely made and the right design is chosen, it does not cause any problems. However, I also have experience with savers that brought problems. I will be glad for your further experience with the operation of your chassis without a saver.
I can definitely see issues coming up, and I expect the servo to die sooner than in my other chassis. If something breaks because of this, I will report back. Also worth noting that this KISS front end is 2mm wide on each side versus the standard mini-z wide front design. That means even running 0mm offset rims, they are somewhat exposed.
@@sammybaka Wider models have better driving characteristics, but the axles are more loaded, especially at the front.
Can you please try to get your haves on the new brushed kyosho mini z optima or just a brushed buggy in general? I’m waiting to get money to buy one and I want to see your opinion please.
Unfortunately I haven't gotten a chance to play with one so far. From what I've gathered, it can use a bit more power but I've heard the xspeedv brushed motor upgrade works well there. I've also seen a couple of people going to pn50t which I'm not sure is healthy for the ESC but they were very fast.
The center pivot is core and weak point of this car. It’s made of plastic. Not good with hard body. If you keep bumping the body, the mount that holds the body, the screws get lose thread. This part should have been made with aluminum or steel.
Thanks for sharing this. I will need to pay attention to this because if there's one thing I do a lot it's hitting the body. What chassis do you run?