Strange noises from helicopter
Im pretty new to the aviation industry, so i will shoot away and ask my question.
Yesterday while down in the V&A Waterfront watching the helicopters take off and land, a Bell Jetranger belonging to Sport Helicopters made two loud banging noises which i have not heard before. The Helicopter is a Bell Jetranger, Reg ZS-HMB.
After speaking to one of the pilots he said that the turbine was barking and was caused by the compressor...
Can anyone explain this to me. What is barking..another oldish pilot said something about stalling????
What is the cause and is it safe to fly when it does this???
Many thanks