"Sometimes there's some wipeouts and crashes too."
Mr Thornley said there was a lot of skill involved in the activity, and hoped the event might attract more people, the younger generation in particular, to take it up.
At present the club has about 30 members but Mr Thornley said he would love to see that number increase.
"It's something quite unique," he said.
Mr Thornley said about 12 pilots were expected to fly their model aircraft at the event.
Control line models were particularly popular in the 1960s and 1970s, he said.
The event will be followed by a barbecue.
Details
What: Rotorua Model Aircraft Club Stunt Control Line Model Event
Where: Rotorua Model Aircraft Club Flying Field, Mead Rd, Rotorua.
When: Tomorrow, from 10am to 3pm.
Cost: Free