Hi,
All the engines gas and glow for R/C have carbs you don't want an engine without a carb. It helps to control the speed of your plane like you do with a car.

Glow engines like K&B, O S, lot of other brands most popular sizes are .25, .35, .40, .45, .56, and .60's cubic inch use a glow plug that you connect a 1.5 volt battery to it for starting the engine. The fuel that it use has a mixture of nitros and a % of oil for cooling and lubercating.

Giant scale isn't really for beginners untill you can handel your plane without any difficultity, then if you want to move up to giant size planes there are also trainners for that size too. The good thing about gas it's cheeper than glow fuel. They take a lot more space to store.
Gas engines has a sparkplug and use regular gasoline with a ratio of oil added just like a weed eater or chainsaw engines use a gas oil mixture. These engines have been designed for aircraft use- 1.5, 2.3, 3.1, and 5.8, and larger cubic inch are used for giant size 1/5, 1/4, 1/3 wing span 82", 9ft, 12 ft. for scale or larger planes.

Lot of times you will hear the term chainsaw engine for the airplane gas engines. It comes for the first time gas engines were used was a chainsaw engines. There was so much viberation it caused the tail to break off.

I'll try to find a web sites that has more info.


rcflyer