The Exeter pilot had to put on protective equipment during what's being called a sustained attack.
It happened on Saturday night.
A tweet from the National Police Air Service in the South West said the crew were able to identify the offender's location within 60 seconds.
Misconduct inquiry into suspended chief constable suspended
Frustration at pace of investigation
Good time for dolphins in Torbay
VIDEO: Happy pods spotted
Devoncast - traffic, trees and Toby Buckland
Devoncast is back with the latest from around the county
Shoplifting and violent crime up in Devon and Cornwall
But new IT system won't give some figures
Riviera Airshow fit to fly
Funding gap filled
How Torbay Hospital bosses are tackling 'risks'
Poor state of buildings impacting staff and patients
