Question: What size propeller should I use on my VMAX Engine?

Answer: Please see the documentation that came with your VMAX Engine. There is a propeller chart that will help you with choosing an appropriate propeller. This chart  is usually located towards the back of the manual, often it is on or near Page 8.

Please note that although prop size is related to the engine size, there are many other factors to consider. Altitude, temperature and aircraft type all are important factors that affect the prop selection. Air at higher altitudes and/or warmer temperatures is thinner and produces less thrust than lower altitude and/or colder air. Fuel type, nitro content and glow plug type can also play a role. A good idea is to talk to some of the flyers at your club. They will be familiar with the altitude and climate in your area and have a good idea of what props work best on what size engines.

We have included below, a manual from VMAX that has a propeller chart for use as a reference. This is a good guideline and works as a starting point for VMAX and most 2 stroke engines.