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When the RC frequency spectrum was first introduced to provide controlled facilities for radio control (RC) modelers, it was limited to a set of just six. These frequencies were not labeled with channel numbers as they are today, but were represented by multi-colored flags; purple/white for 72.320 MHz (megahertz), red/white for 72.240 MHz, etc. Having only 6 frequencies to choose from was quite restrictive and meant a lot of RC airplane pilots had to be grounded, waiting to take their turn on a given frequency.

The RC model airplane frequency spectrum today is much broader, consisting of a much larger batch of 50 channels in the 72 MHz band in the USA, a similar batch in the 35Mhz band in the UK and other bands according to country. In addition, there remain a few 27 MHz channels shared across many uses including for 'park flyer' model airplanes, and a handful of other more specialized channels reserved for licensed amateur radio operators. For convenience, I'm just going to refer to the 72Mhz band as the band allocated for model airplane use in the USA. You will need to read that as the band allocated for model airplane use in your own country.

So now you've decided to buy your RC model and radio equipment you also need to decide which radio frequency you are going to operate on. Unlike most other features of the sport, choosing a popular channel which is used by lots of other people is not a good idea. Choosing a standard 72 MHz frequency for your radio can be as simple as going to the local hobby store and

purchasing one with a standard radio setup. But randomly choosing a channel can result in a problem if you don't do a little investigation first.

Firstly, decide whether you are going to be a park flyer using 27 MHz or going for a more advanced setup on 72 MHz. The 27 MHz channels are primarily dedicated to what are considered "park flyers". These pre-packaged systems usually come with everything you need to get up and flying and are intended for the casual flyer that just wants to get out, get in the air, and not mess with the higher cost of a more complex airplane and radio setup. Choosing a RC model airplane park flyer package with a pre-set frequency needs little to no investigation since you have little choice as the packages give you a choice of only 3 or 4 channels, some FM, some AM. Channel conflicts in a RC park flying situation are less common due to the large number of parks and flying areas available to the casual pilot. But if you do invest in a park flyer then be aware that there may well be other pilots out there in the park using the same frequency as you - and that can mean expensive trouble when you lose control of your airplane, or even worse if some stranger accuses you of causing his airplane to crash.

Second, if you are going for 72 MHz then visit your flying field and find out what other people are using. Imagine arriving to your favorite RC model airplane flying field only to find someone else already using the channel you have just paid out good money for. Some clubs have rules pertaining to what happens in this situation. As only one pilot can operate at a time on a given frequency this usually means pilots having to switch off and take turns using the frequency - and some means of the club controlling the changeover process either by physically taking control of the transmitter or just having a procedure written into the club rules. If you are flying at a busy site that is not a sanctioned flying club with rules and bylaws, you might find yourself sitting out and unable to fly for the day.

The smartest way to choose an RC frequency for your radio is to do some legwork first. Visit the field where you will do most of your flying. Investigate what channels are already in use and which channels are seldom used. Finding one that is infrequently used or not used at all will allow you to buy, secure in the nowledge that you will be able to fly with minimum interruption.

Third, make sure you can change the frequency after you have bought the equipment. If you take care to check before you buy whether the system will allow you to do a manual crystal replacement then if you run into a problem you can change later to a channel which is less busy. Some crystal changes you can do yourself while others have to go back to the factory to have the work done. Regardless of your current situation, if you already have an RC radio setup, or just thinking about getting one, doing a little footwork up front can go a long way.

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First things first! Why is it important to clean and properly store radio controlled cars? Do you remember the reason your mother always told you to clean yourself up, clean your room, wash the dishes, etc.? That is - to keep you clean as well as up and running.

The same is true with radio controlled cars. The following are effective and necessary tips to store and keep those vehicles in great shape.

Believe it or not, the fuels used in nitro trucks or cars as well as in radio-controlled cars contain lubricants. The lubricants in these cars actually serve to protect the engine. This is due to the fact that not all of it gets burned when the engine runs. This therefore results in a chassis that is coated with a lot of oil which made its exit from the car's pipe.

The way to remove this as easily as possible is by using a cleaner: one example is Simple Green. However, it is best to first remove all and any radio equipment before cleaning; after which, plug the inlets onto the engine. Another option is by removing the engine itself.

The chassis should then be sprayed down lightly. Use a brush that has a firm bristle to knock away any grime. Once the chassis has been cleaned, use a towel to dry it. Then, re-install the removed components.

The majority of radio-controlled cars have an electric starter. The bearings in this starter should always be oiled and cleaned at least every week or two.

The starter should then be removed as carefully as possible. The use of a screwdriver is an effective way to keep the pressure on the mechanism as the starter is pulled off the plate's back.

Spray the bearing with engine spray in order to clean it. Oil the bearing in order to keep it running smoothly. You will discover that once the engine and starter is reassembled, it will work almost as good as new.

Fuel should be stored in a place that is dry and - as much as possible - away from pets, children, or anyone else who could mistake the fuel as washer for the windshield.

All in all, when fuel is stored, it could absorb water vapor over a significant amount of time, especially if the container is not sealed perfectly. It is best to store bottles on a cardboard and not on the carpet directly or on cement.

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