title_body: What props for a 2207 2750KV motor? I have a 4s Nazgul5 drone. It is a 5'' drone and uses 2207 2750kv brushless motors. What is the most aggressive prop I can use on the drone without causing it to overheat or cause the battery to sag?
upvoted_answer: This table provides guidance to propellor size:
  
  ╔══════════════════╦═══════════════╦═════════════════╦══════════════════╗
  ║ Frame size       ║ Prop size     ║ Motor size      ║ KV               ║
  ╠══════════════════╬═══════════════╬═════════════════╬══════════════════╣
  ║ 150mm or smaller ║ 3" or smaller ║ 1306 or smaller ║ 3000KV or higher ║
  ╠══════════════════╬═══════════════╬═════════════════╬══════════════════╣
  ║ 180mm            ║ 4"            ║ 1806            ║ 2600KV           ║
  ╠══════════════════╬═══════════════╬═════════════════╬══════════════════╣
  ║ 210mm            ║ 5"            ║ 2204-2206       ║ 2300KV-2600KV    ║
  ╠══════════════════╬═══════════════╬═════════════════╬══════════════════╣
  ║ 250mm            ║ 6"            ║ 2204-2208       ║ 2000KV-2300KV    ║
  ╠══════════════════╬═══════════════╬═════════════════╬══════════════════╣
  ║ 350mm            ║ 7"            ║ 2208            ║ 1600KV           ║
  ╠══════════════════╬═══════════════╬═════════════════╬══════════════════╣
  ║ 450mm            ║ 8", 9", 10"   ║ 2212 or larger  ║ 1000KV or lower  ║
  ╚══════════════════╩═══════════════╩═════════════════╩══════════════════╝
  
  
  (table source)
  
  From this, your propellor size should be 5” for 2207/2750 KV motors, I wouldn't recommend going much smaller/bigger than that in order to not cause damage.