The Tools page contains all of the essential reference information and guidelines a hobbyist needs to make decisions regarding powerplants, picking the right motor/battery/esc combination and calculating performance before you even leave the ground.
A word about safety
As a rule, recommendations made by calculators and guides provided by 2 Brothers Hobby NEVER supersede the manufacturers recommendations for your specific product. 2 Brothers Hobby’s calculators and formulas provide general guidelines but your specific equipment may deviate from our formulaic assumptions and following our recommendations could result in permanent equipment damage or personal injury.
Always consult your manufacturer specifications and recommendations for battery charger settings, battery charge rates, propeller sizing, or any other configuration regarding RC airplane or helicopter powerplants.