I've been into rc cars/monster trucks for about 4 years and am just getting into flying. Everyone in the car/monster truck world know that it's a complete no no to run the engine for any amount of time without the air filter attached because of small dust particles that can/will damage the engine when introduced into the carb. Why is it that rc plane engines don't need them? Surely there are tiny dust particles at the flying field (when taxiing, taking off and landing).