Throbbing Javelin
In the mid-60s, I was an aircraft tradesman at Tengah and recall hearing a peculiar throbbing noise from the engine(s) of a Javelin straight after startup. I was told that this was not unusual but cannot recall what the cause was said to be (resonnance, unburnt IPN fuel from the starter system?). Can anyone please comment?
Of course, after 50 years, my memory may be playing tricks. Moreover, at the time, I was young, single and in Singapore so may have been preoccupied by throbbing of a different kind!