[robbo]

Hi Wayne, Depends on alot of factors and what you want. How big is the plane? Estimated weight?
Did it come with a recommended engine size if from a kit, or are you scratch-building? Gas engines are more messy, noisier, and you cant fly them at a number electric only fields like ours. They do though sound better, feel more scale, and you can fly longer.

Electric is dominant and in terms of power just as powerful, perhaps more so in the small to mid range, larger models will be gas/petrol, the battery weight and charging hassle works against electric for larger models.

The electrics can seem confusing at first, dont worry we have all been there, you can work it out, there is plenty of stuff on the web and when you get down to the field, ask some members to explain their setup. Most of it is largely plug and play these days, with little soldering, once you work out the right bits to buy.

Post some photos or details of your build and we can try and give you some suggestions.