By Terry Dunnon How To Get Into Hobby RC: Upgrading Your Car and Batteries

In my previous article, I talked about my experience with the ECX Ruckus monster truck and how it brought me back up to speed on current RC technology. One of the challenges that I faced with the Ruckus was that I thought it was too fast for my son to handle. He spent some time driving a slower car and soon had the skills necessary for the Ruckus. That gateway car was a Duratrax Evader BX buggy (which is no longer produced). It was a perfect starter car for him. It was slow enough to keep him out of too much trouble while he honed his driving reflexes. Yet, it was fast enough to get him excited about the hobby, challenge him on occasion, and satisfy the dirt-slinging ambitions of a pre-teen. Once he became comfortable with the Ruckus, however, it was clear that we needed another fast vehicle to keep both of us entertained.

The modified Evader is slightly smaller than the Ruckus, but its performance is on par. Both are powerful and fast.

The simplest route would have been to install a more powerful brushed motor and a new set of high-traction tires on the Evader. After briefly considering that option, I decided to modernize the buggy completely. I added ball bearings, a 2.4GHz radio, a brushless motor system and a quasi-monster truck makeover. Let's walk through that upgrade.

Many RC cars include bronze bushings on their moving parts rather than ball bearings. They work okay for beginners, but they eventually wear down and the tolerances between moving parts get loose. Then things get sloppy, noisy, and draggy. Upgrading to ball bearings reduces quite a bit of friction, but also maintains the same tolerances throughout the life of the car. I purchased a set of ball bearings for the Evader and guided my son through the steps to install them.

Ball bearings reduce friction between rotating parts, but they also maintain consistent tolerances over time. The bushings included with many starter cars eventually become sloppy and wear out.

To install the bearings, we had to disassemble the whole transmission. This was a good opportunity for my son to get a look inside the gearbox and get a feel for what it does and how it works. There are also bearings for the rear axles and front wheels. It probably took less about an hour to do the whole thing.

The radio that came with the Evader worked just fine. However, I wanted not only a 2.4 GHz radio, but something with more adjustability to help control the power I expected out of the souped-up Evader. I ended up with a Futaba 4PLS 4-channel radio system. What a radio! I’ll cover its range of features in the upcoming computer radio overview. But I can say that this is by far the nicest surface radio I’ve ever owned and probably the last one I’ll ever need.

I removed the receiver that was in the car and replaced it with the Futaba receiver. It is held in place with adhesive-backed Velcro. The Evader has a flexible tube that is mounted vertically to elevate the receiver antenna. Since the antenna on the 2.4GHz receiver is considerably shorter than the antenna on the stock 27MHz receiver, I shortened this tube accordingly.

I upgraded the Evader’s stock radio with a Futaba 4PLS 4-channel radio. It is a 2.4GHz radio with built-in telemetry features.

Duratrax sells a brushless upgrade kit that is intended for 2-wheel drive buggies and trucks. Since motor mounts are pretty much universal across all hobby grade cars, this was a bolt-in replacement. I removed the stock motor and ESC from the car and the brushless components filled in the empty space. As with the receiver, the ESC is held in place with Velcro.

The only remaining step was to remove the pinion gear from the old motor and add it to the new one. The motor position is adjustable to accommodate different gears and to allow adjustment of the gear mesh between the pinion and its mating spur gear. I set the mesh by sandwiching a strip of paper between the gears.

Inserting a piece of paper between the gears is an effective way to set the proper mesh when installing a motor. In this photo, I am installing a Duratrax brushless motor on the Evader. Note the small setscrew on the pinion gear…they strip easily.

Sometimes it is necessary to change gearing when you change motors because of each motor’s specific performance characteristics. However, I was confident that the stock gearing would not overstress the brushless motor. The only question that remained in my mind was whether the stock transmission gears would hold up to the added power of the new motor. So far, they are working fine.

At this point, it is worth pointing out the value of having quality tools when working on RC cars. Many times (as with pinion gears) you will need to remove small setscrews (typically 3mm) that have been tightened as much as possible. Trying to remove these setscrews with a hex wrench (aka Allen wrench) that is the wrong size or even slightly worn will very likely strip the drive cup of the setscrew. Then you are in for some real frustration! So keep metric and standard wrenches on hand and toss them when they start to become worn. Ball-end hex wrenches wear out and strip screws easily, so I generally avoid them.

This photo illustrates the overall layout of the Evader after being modified to a brushless-powered truck.

It is also a good idea to have a few Japanese Industrial Standard (JIS) screwdrivers on hand. Many RC cars use JIS screws. They look much like Phillips screws, but the drive cups are slightly different. Using a Phillips screwdriver on JIS screws will cause premature wear on the drive cups and eventually strip them. Phillips screws, however, are quite tolerant of using JIS drivers. JIS tools tend to be rather expensive, but they are a worthwhile investment.

Test Drive

After the bearings, new radio and new motor were installed, the Evader looked pretty much like it did before. It was, in fact, a very different machine. My son and I test drove it and found that it was now much faster-nearly as fast as the Ruckus. However, the upgraded Evader had a strong tendency to spin out at every turn. There are numerous suspension adjustments that can be made to fine-tune steering response, but I think tires are the best place to start attacking traction problems.

I was still using the Evader’s stock knobby tires which were several years old. Although they didn’t look very worn, they had hardened over time. Just as with full-size cars, soft tires are sticky tires. So, I set out to find some new tires that would be softer and also have a tread pattern that would work reasonably well on dirt or paved surfaces.

The Duratrax Evader BX served as an ideal starter car for my son. It was fast enough to hold his interest, but tame enough that he could control it. Best of all, it readily accepted upgrades to improve its performance.

Tires are typically glued to the wheels, so I couldn’t just pull the old tires off of the stock wheels (not easily anyway). I had to look for new wheels and tires for the Evader. I can’t even begin to tell you how many choices there are when it comes to wheels and tires. They are made to suit any application you can think of. You can even get paddle tires to run your car in loose sand or skim it across open water! For a 1/10 scale buggy like the Evader, you can expect to spend at least $40-$50 on a full set of tires.

As I was searching for tires on the Tower Hobbies website (where I bought the Evader), I came across a set of four all-terrain tires for just $10.99. These tires are stock equipment on the Evader EXT 2.4, a not-so-distant cousin of my Evader BX. I also found the matching wheel set for only $9.99. Just glancing at photos of the EXT 2.4, I could see that it shares the same core components as my BX. With the allure of a cheap set of tires, I ordered the EXT wheels and tires with the assumption that I could use them on my BX. For the most part, I was right. I did have to install longer front axles and steering knuckles from the EXT to make the front tires work. But even with those added parts, I was ahead of the game cost-wise.

Although cost was a deciding factor, the main reason I wanted the tires from the Evader EXT was to make my Evader a little bit more versatile. The larger front and rear tires would give better footing on grass and rough ground than the smaller buggy tires (which are better suited to well-groomed dirt racetracks). Even with the bigger tires, I could have kept the original buggy body on the Evader. Keeping that form-fitting cover in place would help keep out a lot of the detritus that inevitably permeates into all parts of the car. The only problem is that it would have looked a little odd (oh vanity!).

I found a prepainted monster truck body on sale for about $20 (a very good deal), so I picked that up as well. Because this body wasn’t specifically made for the Evader or any of its variants, I knew that I would have to find my own way to mount it to the car. I bought an EXT front body mount and I was able to fit it on the BX with a homemade adapter plate made from a scrap circuit board. The rear of the body is held in place with Velcro.

I adapted the front body mount from the Evader EXT by fabricating a simple adapter plate from scrap circuit board.

When I was done, my Evader was a hybrid of the BX buggy and EXT 2.4 truck models. After installing the larger rear tires (which is equivalent to changing gears), it now keeps pace with the Ruckus. The softer tires also alleviated much of the spin-out problem. I plan to tweak it further with suspension adjustments.

The Evader upgrade was a very straightforward project and just a hint of the customization that is possible with RC cars. My goal was also to illustrate that older cars need not be discarded. In many cases, they can be upgraded to take advantage of new technology. My son and I now have a pair of cars with similar performance that we can enjoy together on the street or down at the park.

The completed truck conversion of the Evader BX looks very different from the original buggy style. This radical change only required a few component swaps. Such adaptability is common in the RC car world.Battery Choices

Batteries have progressed a long way during the past decade--a very long way. Lithium-Polymer (LiPo) batteries matured to the point where they can finally handle the extremely high discharge rates that hobbyists demand. These batteries are not only lighter, but they have much higher energy densities than Nickel-Cadmium (NiCad) and Nickel Metal Hydride (NiMH) cells. Along with brushless motors, LiPo batteries are responsible for making ridiculous performance available to the RC car masses. Cars with out-of-the-box speeds of 50+ mph are not uncommon, with some cars being capable of more than 100mph!

The performance advantages of LiPo technology come with a tradeoff--they are intolerant of abuse and mishandling.

With all of the performance available using LiPo batteries, you may be surprised that I’m going to suggest that you ignore them for now. The performance advantages of LiPo technology come with a tradeoff. LiPos are intolerant of abuse and mishandling. The consequences of a scorned LiPo may be as slight as a premature death for the battery pack. A more severe reaction would be fire. Yes, cars (RC and full-scale) and homes have burned to the ground because an angry LiPo caught spewed flames.

Don’t think that LiPos are akin to live hand grenades - it’s not that severe. They do however require respect, diligence, and knowledge of their proper care and feeding. A common rookie mistake is leaving a battery plugged into your model and simply turning off the switch to deactivate it. If left overnight in this condition, housekeeping current demanded by the ESC could drain the battery below its safe discharge voltage…leaving you with an irreparable battery. As you get more familiar with the quirks of RC equipment, you may decide that you’re ready for the jump to LiPos. Then again, maybe you won’t. I have a workshop full of LiPo batteries that I use in my RC aircraft, but I still have not found a compelling reason to use them in my RC cars.

Here are examples of three different battery chemistries used in RC. The top battery is a 7-cell (8.4V nominal) 2400mAh NiMH pack. Below it is a 2-cell (7.4V nominal) 2100mAh LiPo battery. The bottom battery is a 2-cell (6.6V nominal) 2300mAh A123.

As the advancement of LiPo technology has stolen the RC spotlight for several years, NiMH batteries have quietly seen similar leaps in capability. For instance, the battery that came with my ECX Ruckus truck is a 7-cell NiMH with 2400mAh capacity. Other 7-cell NiMH packs are available in the same physical size (classified as Sub-C, as compared to AA, D, et al) but with more than 5000mAh capacity. Theoretically, such a battery would provide the same performance, but with more than twice the run time. The primary difference between the batteries is cost.

Whereas LiPos have some unintuitive requirements, NiMH cells can tolerate users with layman-level battery knowledge.

Of course, you can also do stupid things with NiMH batteries that would cause them to perish or catch fire. However, such things usually require malicious intent. Whereas LiPos have some unintuitive requirements, NiMH cells can tolerate users with layman-level battery knowledge. For that reason, I suggest that beginners start out with NiMH batteries. NiCad batteries are also a valid option, but they are not as prevalent as they once were.

The batteries that I most often use in my cars are called A123 cells. Specifically, their chemistry is Lithium-Nanophoshate (LiFePO4). A123 Systems is the company that brought this battery technology to market several years back. In short, A123 batteries are a compromise between the energy density of LiPo cells with the robustness of NiMH cells. There are other LiFe batteries on the market, but as I write this, only the A123 cells have the discharge rates needed for powering amp-hungry electric motors. Along with A123 cells, the other LiFe batteries are often used to power the onboard radio equipment for gas/nitro-powered cars and larger airplane models (where the required discharge rate is much, much lower).

A123 cells are my preferred battery type for RC cars. Here, we have a triad of different configurations: a side by side 2-cell pack (bottom), and end-to-end 2-cell pack (top left), and a factory-assembled 3-cell pyramid pack.

Most often, I use a 2-cell A123 pack in my cars. The fully charged voltage is 7.2v, which is roughly equivalent to a 6-cell NiMH battery. Each cylindrical cell is about the same diameter of a standard C-sise battery, but the A123 is roughly .6 inches longer. The original version of this cell has a 2300mAh capacity, but newer models (which I have not yet used) are 2500mAh. Compared to an average 6-cell 2500mAh NiMH battery, the 2-cell A123 has slightly less voltage and capacity, but only 45% of the mass (5.5oz vs. 12oz).

A123 batteries are a compromise between the energy density of LiPo cells with the robustness of NiMH cells.

Without getting mired in the discharge characteristics of the different cells, I will say that I detect very little difference performance-wise between the A123 and the stock NiMH in my Ruckus. If I didn’t know which battery was installed, I couldn’t tell the difference by driving. The only issue I run into with A123s is their form-factor. Side by side packs are often too wide to fit in stock battery compartments (the Evader is a notable exception). End to end packs have a small girth that may not mesh with the car’s battery retention method. I’ve always been able to figure out a workable solution with Velcro in strap form (Ruckus) and/or the adhesive-backed variety (Evader).

I think that I may be somewhat alone in my continued usage of A123 batteries. If you care to join me, you can buy factory assembled A123 packs from numerous vendors. Those of you comfortable with heavy soldering can save a few bucks by assembling your own packs from individual cells. In fact, most of my A123 packs were built with cells scavenged from certain DeWalt cordless drill batteries. Also note that A123 cells require specific chargers. Hooking one to a NiMH charger would be a bad idea. Many new RC chargers can handle multiple battery chemistries, including A123.

Coming Up

This concludes my RC car overview. I hope you now have a better idea of what is available off-the-shelf, as well as the potential for customization and experimentation. In reality, what I’ve shown here is a very narrow snapshot of the hobby. I’ll revisit the car topic periodically to touch on new developments or interesting projects. Next time, I'll assume the role of the Fun Police and take a critical look at Norm and Will’s testing of the DJI Phantom 2 Vision + quadrotor. They committed a few common rookie mistakes that are worth pointing out!

自動(dòng)翻譯僅供參考

如何操作業(yè)余RC：升級(jí)您的汽車和電池

特里DunnonHow進(jìn)入業(yè)余愛(ài)好RC：升級(jí)你的車，電池
在我以前的文章中，我談到了我的經(jīng)驗(yàn)與ECX Ruckus的怪物卡車，以及如何把我?guī)Щ靥岣咚俣饶壳癛C技術(shù)。相反，我所面臨的Ruckus的挑戰(zhàn)是，我認(rèn)為這是太快，我的兒子來(lái)處理。他花了一些時(shí)間駕駛一輛慢車，很快就有必要對(duì)Ruckus的技能。該網(wǎng)關(guān)輛車是Duratrax BX強(qiáng)制收兌車（現(xiàn)已不再生產(chǎn)）。這是一個(gè)完美的入門車了。這是緩慢的，足以讓他出去太麻煩，而他磨練了他的駕駛反射。然而，它是速度不夠快，讓他興奮的愛(ài)好，有時(shí)他挑戰(zhàn)，并滿足前十幾歲的污垢吊索的野心。一旦他熟悉了Ruckus的，但是，很明顯，我們需要另一種快速的車輛，以保持我們倆娛樂(lè)。

修改后的強(qiáng)制收兌比Ruckus的略小，但其性能卻不相上下。兩者都是強(qiáng)大的，快速的。
最簡(jiǎn)單的路線將是安裝一個(gè)更強(qiáng)大的有刷電機(jī)和強(qiáng)制收兌一套新的高牽引力的輪胎。在簡(jiǎn)要考慮這種選擇，我決定把車徹底的現(xiàn)代化。我加了滾珠軸承，2.4GHz的無(wú)線電，無(wú)刷電機(jī)系統(tǒng)和準(zhǔn)怪物卡車改造。讓我們走過(guò)的升級(jí)。

許多遙控汽車包括他們的移動(dòng)部件，而不是球軸承青銅襯套。他們的工作好，適合初學(xué)者，但他們最終拖垮和運(yùn)動(dòng)部件之間的公差松動(dòng)。然后事情就變得馬虎，嘈雜的，和拖拉。升級(jí)到球軸承減少相當(dāng)多的摩擦，同時(shí)也保持了相同的公差在整個(gè)汽車的使用壽命。我購(gòu)買了一套球軸承強(qiáng)制收兌，并一步步引導(dǎo)我的兒子來(lái)安裝它們。

球軸承減少摩擦旋轉(zhuǎn)部件之間，但它們也保持一致的公差隨時(shí)間。該襯套包括許多起動(dòng)汽車最終成為馬虎和磨損。
要安裝軸承時(shí)，我們不得不拆開(kāi)整個(gè)傳輸。這是我兒子的好機(jī)會(huì)一睹變速箱內(nèi)，感受一下它做什么以及它是如何工作的。也有軸承為后軸和前輪。大概花了更少的大約一個(gè)小時(shí)來(lái)做這件事。

附帶強(qiáng)制收兌的無(wú)線電工作就好了。不過(guò)，我想不僅是一個(gè)2.4 GHz無(wú)線電的事，但有更多的可調(diào)節(jié)性，以幫助控制我的預(yù)期了馬力向上強(qiáng)制收兌的力量。我結(jié)束了一個(gè)雙葉4PLS 4通道無(wú)線電系統(tǒng)。什么是無(wú)線！我將介紹即將推出的電腦無(wú)線概述功能范圍。但我可以說(shuō)，這是迄今為止我永遠(yuǎn)需要最好的表面收音機(jī)我曾經(jīng)擁有的，可能是最后一個(gè)。

我刪除了，這是在汽車，并與雙葉接收器取代了它的接收器。它舉行的地方用膠粘劑支持魔術(shù)貼。強(qiáng)制收兌具有被垂直安裝于提升接收機(jī)天線的柔性管。由于在2.4GHz接收機(jī)上的天線是比股票27MHz的接收器上的天線相當(dāng)短，我相應(yīng)地縮短該管。
我用雙葉4PLS 4頻道無(wú)線電升級(jí)強(qiáng)制收兌的股票收音機(jī)。它是具有內(nèi)置遙測(cè)功能的2.4GHz的無(wú)線電。
Duratrax銷售無(wú)刷升級(jí)套件，適用于2輪驅(qū)動(dòng)越野車和卡車。由于電機(jī)安裝是非常普遍的所有愛(ài)好高檔轎車，這是螺栓式替代。我刪除從車上股票馬達(dá)和ESC和無(wú)刷部件填補(bǔ)了空白。與接收機(jī)中，該ESC被保持在適當(dāng)位置與魔術(shù)貼。

唯一剩下的步驟是從舊電機(jī)拆下小齒輪和將其添加到新的。電機(jī)的位置是可調(diào)節(jié)的，以適應(yīng)不同的齒輪，并允許該小齒輪及其配對(duì)正齒輪之間的調(diào)整的齒輪的嚙合。余由齒輪之間夾著一張片設(shè)置網(wǎng)格。

插入齒輪之間的一張紙是一種有效的方式在安裝電機(jī)時(shí)，設(shè)置適當(dāng)?shù)木W(wǎng)格。在這張照片中，我安裝上強(qiáng)制收兌一個(gè)Duratrax無(wú)刷電機(jī)。注意在小齒輪的小型固定螺絲......他們很容易剝離。
有時(shí)是必要的時(shí)候，你改變，因?yàn)槊總€(gè)發(fā)動(dòng)機(jī)的具體性能特點(diǎn)馬達(dá)來(lái)改變傳動(dòng)裝置。但是，我相信，股票資產(chǎn)負(fù)債不會(huì)過(guò)分強(qiáng)調(diào)無(wú)刷電機(jī)。那留在我的腦海里唯一的問(wèn)題是股票傳動(dòng)齒輪是否會(huì)撐起來(lái)的新電機(jī)的附加能力。到目前為止，他們工作的罰款。

在這一點(diǎn)上，值得指出的遙控汽車工作時(shí)，有質(zhì)量的工具的價(jià)值。很多時(shí)候（與小齒輪），你將需要?jiǎng)h除的小定位螺絲（通常為3毫米）已擰緊盡可能。試圖刪除這些固定螺釘用內(nèi)六角扳手（也稱為內(nèi)六角扳手），這是錯(cuò)誤的大小，甚至輕微磨損很可能會(huì)剝離驅(qū)動(dòng)杯的固定螺絲的。那么你是在一些真正的無(wú)奈！因此，保持指標(biāo)和標(biāo)準(zhǔn)扳手的手，折騰他們，當(dāng)他們開(kāi)始變得磨損。球頭內(nèi)六角扳手磨損，帶螺絲很容易，所以我盡量避免使用它們。

這張照片顯示了強(qiáng)制收兌被修改為無(wú)刷動(dòng)力卡車之后的整體布局。
這也是手頭上有幾個(gè)日本工業(yè)標(biāo)準(zhǔn)（JIS）螺絲刀一個(gè)好主意。許多遙控汽車使用JIS螺絲。它們看起來(lái)很像十字螺絲，但驅(qū)動(dòng)杯略有不同。使用在JIS螺絲十字螺絲刀將導(dǎo)致在驅(qū)動(dòng)杯過(guò)早磨損，并最終帶他們。十字螺絲，卻是相當(dāng)寬容使用JIS驅(qū)動(dòng)程序。 JIS工具往往是相當(dāng)昂貴的，但他們是一個(gè)值得的投資。
試駕
軸承，新的無(wú)線電和新的發(fā)動(dòng)機(jī)被安裝后，強(qiáng)制收兌看起來(lái)很像以前那樣。它是，實(shí)際上，一個(gè)非常不同的機(jī)器。我的兒子和我試駕了一下，發(fā)現(xiàn)這是現(xiàn)在快得多，幾乎快如Ruckus的。然而，升級(jí)后有強(qiáng)制收兌傾向較強(qiáng)分拆動(dòng)不動(dòng)。有跡象表明，可微調(diào)的轉(zhuǎn)向反應(yīng)無(wú)數(shù)懸掛的調(diào)整，但我覺(jué)得輪胎開(kāi)始進(jìn)攻牽引問(wèn)題的最佳場(chǎng)所。

我還是用強(qiáng)制收兌的股票多節(jié)的輪胎這幾個(gè)歲。雖然他們并沒(méi)有看起來(lái)非常破舊，他們已經(jīng)硬化隨著時(shí)間的推移。正如全尺寸轎車，軟胎是粘性的輪胎。于是，我開(kāi)始尋找一些新的輪胎，這將是更柔軟，還具有將工作相當(dāng)好有污點(diǎn)或鋪設(shè)路面的胎面花紋。
該Duratrax BX強(qiáng)制收兌擔(dān)任一個(gè)理想的首發(fā)車為我的兒子。這是速度不夠快，保持他的興趣，但馴服，以至于他可以控制它。最重要的是，它欣然接受了升級(jí)，以提高其性能。

輪胎通常粘在車輪，所以我不能只是拉了舊的輪胎掉股票輪（不容易反正）的。我不得不尋找新的輪轂和輪胎強(qiáng)制收兌。我不能甚至開(kāi)始告訴你有多少選擇，有當(dāng)談到車輪和輪胎。它們是由以適應(yīng)任何應(yīng)用程序，你能想到的。你甚至可以槳輪胎跑你的車在松軟的沙土或在水開(kāi)撇去了！對(duì)于一個(gè)1/10規(guī)模的越野車一樣強(qiáng)制收兌，你可以期望花費(fèi)至少$ 40- $ 50上，一套完整的輪胎。

當(dāng)我正在尋找塔愛(ài)好網(wǎng)站上的輪胎（我在那里買強(qiáng)制收兌），我遇到了一組四全地形輪胎為$ 10.99。這些輪胎是車輛設(shè)備上強(qiáng)制收兌EXT 2.4，我的BX強(qiáng)制收兌的不那么遙遠(yuǎn)的表妹。我還發(fā)現(xiàn)了匹配輪只有9.99 $設(shè)置。只是看了一眼照片EXT 2.4的，我看得出來(lái)，它共享相同的核心部件為我的BX。有了一套輪胎的價(jià)格便宜的誘惑，我下令EXT車輪和輪胎，我可以用他們對(duì)我的BX的假設(shè)。在大多數(shù)情況下，我是對(duì)的。我也必須從EXT安裝較長(zhǎng)的前軸和轉(zhuǎn)向節(jié)，使前輪工作。但即使有這些增加的部分，我是超前的游戲成本方面。

雖然成本是一個(gè)決定性的因素，最主要的原因我想從強(qiáng)制收兌EXT輪胎是為了讓我的一個(gè)強(qiáng)制收兌一點(diǎn)更靈活。較大的前部和后部的輪胎將給草和粗糙的地面比小越野車輪胎（這是更適合整齊干凈的污垢賽道）打下基礎(chǔ)。即使有更大的輪胎，我可以保持原來(lái)的馬車身體上強(qiáng)制收兌。保持這種形式的合蓋到位，將有助于保持了很多不可避免地滲透到汽車的各個(gè)部位的碎屑。唯一的問(wèn)題是，它會(huì)顯得有些奇怪（哦虛榮！）。

我發(fā)現(xiàn)在售約$ 20（一個(gè)非常好的協(xié)議）一彩涂怪物卡車的身體，讓我挑了好了。因?yàn)檫@個(gè)機(jī)構(gòu)沒(méi)有專門針對(duì)強(qiáng)制收兌或任何其變種而成，我知道我必須找到我自己的方式將其安裝到車上。我買了一個(gè)EXT前機(jī)身卡口，我是能夠在BX適合它用自制的適配器板從廢舊電路板制成。主體的后部以替代與魔術(shù)貼保持。
我改編自強(qiáng)制收兌EXT編造廢鋼電路板一個(gè)簡(jiǎn)單的適配器板前部機(jī)身卡口。
當(dāng)我完成后，我被強(qiáng)制收兌的BX車和EXT 2.4卡車車型的混合體。安裝更大的后輪胎（這等效于改變齒輪）之后，現(xiàn)在保持同步的騷動(dòng)。較軟的輪胎也減輕多的紡出的問(wèn)題。我打算與懸掛的調(diào)整進(jìn)一步調(diào)整它。

強(qiáng)制收兌升級(jí)是一個(gè)非常簡(jiǎn)單的項(xiàng)目和自定義這是可能的RC車只是一個(gè)提示。我的目標(biāo)是也以說(shuō)明舊車不必丟棄。在許多情況下，它們可以被升級(jí)以利用新技術(shù)。我和兒子現(xiàn)在有一個(gè)對(duì)汽車行駛性能相似，我們可以在公園一起享受在大街上或向下的。

強(qiáng)制收兌BX的完成卡車轉(zhuǎn)換看起來(lái)與原車風(fēng)格非常不同。這徹底改變只需要幾個(gè)組件互換。這種適應(yīng)性在車模world.Battery選擇常見(jiàn)
一個(gè)很長(zhǎng)的路 - 在過(guò)去十年中的電池已經(jīng)發(fā)展很長(zhǎng)的路要走。鋰聚合物（鋰聚合物）電池成熟的地步，他們終于可以處理極高的放電速率的愛(ài)好者的需求。這些電池不僅輕，但它們具有高得多的能量密度比鎳鎘（鎳鎘）和鎳金屬氫化物（NiMH）電池。隨著無(wú)刷電機(jī)，鋰聚合物電池有責(zé)任荒謬的性能提供給車模群眾。汽車行駛出的現(xiàn)成的50 +英里每小時(shí)的速度并不少見(jiàn)，一些汽車能夠超過(guò)百英里每小時(shí)！
鋰聚合物電池技術(shù)的性能優(yōu)勢(shì)配備了一個(gè)折衷 - 他們是不寬容的濫用和不當(dāng)?shù)摹?br /> 所有可用使用鋰聚合物電池的性能，你可能會(huì)驚訝，我會(huì)建議你忽略它們現(xiàn)在。鋰聚合物電池技術(shù)的性能優(yōu)勢(shì)配備了一個(gè)權(quán)衡。 LiPos無(wú)法容忍濫用和不當(dāng)?shù)摹Ｒ粋€(gè)蔑視鋰聚合物電池的后果可能是輕微的過(guò)早死亡的電池組。更嚴(yán)重的反應(yīng)將是火。是的，汽車（RC和滿量程）和家園被夷為平地，因?yàn)閼嵟匿嚲酆衔锵萑雵姵龌鹧妗?/p>

不要以為L(zhǎng)iPos是如同活手榴彈 - 它不是那么嚴(yán)重。不過(guò)，它們需要尊重他們適當(dāng)?shù)恼疹櫤臀桂B(yǎng)，勤奮和知識(shí)。一個(gè)常見(jiàn)的新手的錯(cuò)誤離開(kāi)插入到你的模型電池，簡(jiǎn)單地關(guān)閉開(kāi)關(guān)，關(guān)閉它。如果在這種情況下放置過(guò)夜，按ESC要求的看家電流會(huì)消耗電池低于其安全放電電壓......讓你有一個(gè)無(wú)法彌補(bǔ)的電池。當(dāng)你更熟悉的遙控設(shè)備的怪癖，你可能會(huì)認(rèn)為你已經(jīng)準(zhǔn)備好為跳轉(zhuǎn)到LiPos。話又說(shuō)回來(lái)，也許你不會(huì)。我有一個(gè)完整的，我在我的遙控飛機(jī)用鋰聚合物電池的生產(chǎn)車間，但我仍然沒(méi)有找到一個(gè)令人信服的理由來(lái)使用他們?cè)谖业倪b控車。

下面是在混凝土中使用三種不同的電池化學(xué)組成的例子。頂部電池是一個(gè)7小區(qū)（8.4V標(biāo)稱）2400mAh的鎳氫包。下面是2節(jié)（7.4V標(biāo)稱值）2100MAH鋰聚合物電池。底部電池2節(jié)（6.6V標(biāo)稱值）2300mAh A123。
隨著鋰聚合物科技的進(jìn)步偷了RC聚光燈數(shù)年，鎳氫電池已經(jīng)悄然出現(xiàn)在功能類似的飛躍。例如，隨我ECX Ruckus的卡車電池是7鎳氫電池具有2400mAh的容量。其他7節(jié)鎳氫包是在相同的物理尺寸限制（列為子C，好比至AA，D等人），但與超過(guò)5000mAh的容量。從理論上說(shuō)，這種電池將提供相同的性能，但具有兩倍以上的運(yùn)行時(shí)間。電池之間的主要區(qū)別是成本。
而LiPos有一些直觀的要求，鎳氫電池可以容忍用戶外行級(jí)電池知識(shí)。
當(dāng)然，你也可以做鎳氫電池愚蠢的事情，會(huì)導(dǎo)致其毀滅或著火。然而，這樣的事情通常需要惡意。而LiPos有一些直觀的要求，鎳氫電池可以容忍用戶外行級(jí)電池知識(shí)。出于這個(gè)原因，我建議初學(xué)者開(kāi)始時(shí)鎳氫電池。鎳鎘電池也是一個(gè)有效的選擇，但他們并不像流行，因?yàn)樗麄冊(cè)?jīng)是。

我在我的車最常使用的電池被稱為A123細(xì)胞。具體而言，它們的化學(xué)性質(zhì)是鋰Nanophoshate鋰（LiFePO4）。 A123系統(tǒng)公司是把這個(gè)電池技術(shù)推向市場(chǎng)幾年前的公司。總之，A123電池是鋰聚合物電池與NiMH電池的穩(wěn)健性的能量密度之間的折衷。目前市場(chǎng)上的其他壽命電池，但因?yàn)槲覍?xiě)這篇文章，只有A123細(xì)胞有需要的電源放大器饑渴電動(dòng)馬達(dá)的排出速度。隨著A123細(xì)胞中，其它的LiFe電池經(jīng)常被用來(lái)板載無(wú)線電設(shè)備用于氣體/硝基為動(dòng)力的汽車，以及較大的飛機(jī)模型（其中所需的放電速率是非常非常低）供電。

A123細(xì)胞是我的遙控車首選的電池類型。在這里，我們有不同的配置的三元組：一并排2-電池組（下部），并結(jié)束對(duì)終端2-電池組（左上），以及工廠裝配-3-細(xì)胞金字塔包。
大多數(shù)情況下，我使用的是2節(jié)A123包在我的車。在完全充電電壓為7.2V，這大約相當(dāng)于一個(gè)6芯鎳氫電池。各圓筒型電池是一個(gè)關(guān)于一個(gè)標(biāo)準(zhǔn)的C-SISE電池的直徑相同，但A123是大致0.6英寸長(zhǎng)。這種細(xì)胞的原始版本具有2300mAh的容量，但較新的型號(hào)（我還沒(méi)用過(guò)）是2500mAh的。與之相比，平均6芯2500mAh的鎳氫電池，兩細(xì)胞A123具有略低的電壓和容量，但只有45％的質(zhì)量（5.5盎司與12盎司）的。
A123的電池是鋰聚合物電池與NiMH電池的穩(wěn)健性的能量密度之間的折衷。
而不會(huì)深陷于不同細(xì)胞的放電特性，我會(huì)說(shuō)，我發(fā)現(xiàn)非常小的差別的性能，明智的A123和股票鎳氫電池在我的Ruckus之間。如果我不知道是安裝的電池，我不知道通過(guò)驅(qū)動(dòng)的差別。我跑與A123s唯一的問(wèn)題是他們的外形。并排包往往過(guò)于廣泛，以適應(yīng)股票電池艙（強(qiáng)制收兌是一個(gè)明顯的例外）。端到端的包有一個(gè)小的周長(zhǎng)，可能無(wú)法與汽車的電池保持方法目。我一直能夠找出魔術(shù)貼的帶子的形式（優(yōu)科）和/或粘性襯里品種（強(qiáng)制收兌）一個(gè)可行的解決方案。

我想我可能是在A123的電池我繼續(xù)使用有些孤單。如果你愿意和我一起，你可以買到從眾多供應(yīng)商的工廠組裝的A123包。那些你熟悉重型焊接可以從單個(gè)細(xì)胞組裝自己的包節(jié)省幾塊錢。事實(shí)上，我的大部分A123包均建有細(xì)胞一定得偉電鉆電池清除。還要注意的是A123細(xì)胞需要特定的充電器。掛鉤一個(gè)鎳氫充電器將是一個(gè)壞主意。許多新的RC充電器可以處理多種電池化學(xué)組成，其中包括A123。
接下來(lái)
這結(jié)束我的遙控車的概述。我希望你現(xiàn)在有一個(gè)更好地了解什么是可用的現(xiàn)成的架子，以及定制和試驗(yàn)的可能性。在現(xiàn)實(shí)中，我在這里顯示的是愛(ài)好的一個(gè)很窄的快照。我會(huì)定期重新汽車話題觸及新的發(fā)展或有趣的項(xiàng)目。下一次，我會(huì)承擔(dān)玩轉(zhuǎn)警察的作用，并采取關(guān)鍵看DJI幻影2遠(yuǎn)景+ quadrotor的規(guī)范和意志的測(cè)試。他們犯了一些常見(jiàn)的新秀的錯(cuò)誤，值得指出的！