Gears: Pinions and Spurs

This article is going to mainly pertain to ground vehicles, nitro or electric. We’re going to go through the gearing of these drive trains and figure out what all the numbers mean. You’ll learn the difference between a pinion and a spur gear, the important characteristics of gears you’ll need to know, and you’ll learn how to choose the right gears to get more speed or more torque out of your car or truck. Most of the concepts are easy to get on this subject, especially if you’ve ever ridden a 10-speed bike before. The same gear principles apply to your R/C vehicle.

It doesn’t matter if you’ve got a nitro vehicle or an electric one, the principles of gearing apply to both in the same way, the gears are just different sizes, that’s all. The biggest difference between the two is that sometimes nitro vehicles have two speed transmissions. In either case, however, the gear that’s mounted on the end of the motor or engine is called the pinion gear. It’s the smaller one that drives the bigger gear called the spur gear. Most cars or trucks are sold with gear sets that will give you average speed and average amounts of torque. Options are usually available up or down with both the pinion and the spur gear to give you a number of variations of gearing.

Two of the characteristics of every gear that you need to be aware of if you are going to make changes to your vehicle are the number of teeth, and the pitch of the teeth on the gear. The number of teeth is easy to figure out – you simply count them. Sometimes this number is stamped on the side of the gear: for example 52T for fifty-two teeth. The more teeth a gear has...More

How to Break Into Radio Controlled Hobbies

There are so many possibilities when it comes to Radio Control, or R/C, that it can be overwhelming when you try to decide where to start. You walk into a hobby shop and you feel like the kid in the candy store – you just want it all! But that’s not going to happen on day one, so you need some direction. Here are a few things to first consider before you make your first purchase.

First, where are you going to play with your hobbies? Are you a flyer or a driver? If you fly, how much space do you have access to? Are there any flying clubs in your area? If you are a driver, do you prefer on-road or off-road? Are you interested in racing or do you just want to bash around and have fun? Do you live near a lake or river? Answering these questions will point you in the general direction you need to be heading. This will guide you to the right vehicle type that will give you the most enjoyment.

OK, now that you’ve decided upon a vehicle type, let’s think about what’s under the hood. The two types of systems that drive all R/C products are nitro or electric powered. Nitro (not gas) is short for nitro methane. This is the fuel that drives small 2-stroke or 4-stroke engines found in r/c cars, trucks, planes, helicopters and even boats. The fuel can be purchased at your local hobby shop usually in either quarts or gallons. These small ........More