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Question 
Usually helicopters are having a small fan at the rear 
end, the purpose is;?

(1)	To increase it’s lifting capability
(2)	To balance the torque applied on the main fan
(3)	For safe landing
(4)	For safe taking off
 Question Submitted By :: La.gayan.m
I also faced this Question!!     Rank Answer Posted By  
 
  Re: Usually helicopters are having a small fan at the rear end, the purpose is;? (1) To increase it’s lifting capability (2) To balance the torque applied on the main fan (3) For safe landing (4) For safe taking off
Answer
# 1		 (2) To balance the torque applied on the main fan 
Is This Answer Correct ?    22 Yes 0 No
Niroshana
 
  Re: Usually helicopters are having a small fan at the rear end, the purpose is;? (1) To increase it’s lifting capability (2) To balance the torque applied on the main fan (3) For safe landing (4) For safe taking off
Answer
# 2		 When a shaft rotates, reversible torque works on stationary part of machine, because Helicopter body is free in air and this reversible torque tries to rotate helicopter in opposite to main fan which leads unbalanciing to avoid this a little fan provided at rear end. 
Is This Answer Correct ?    5 Yes 0 No
Jasvir Singh
 
 
 

 
 
 
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