A Queensland space company has reached its final milestone as it prepares to go into orbit next year.

Gilmour Space Technologies' latest rocket engine passed the final qualification stage, as it reached the mission duration performance needed to get to space.

"All engines are now qualified for our first orbital test launch next year," the company's chief executive and co-founder Adam Gilmour said.

In its latest test, the rocket's main engine generated a record 115 kilonewtons or 25,850 pounds-force of stable and efficient combustion.

Mr Gilmour said the single-port hybrid rocket engine is an important element of the rocket's "flight components".

"It is quite a critical piece of our orbital launch technology, and we conducted a very successful test firing of it," he said.

"It was manufactured as if it was on the vehicle in terms of all flight components.

"So, we use this engine on our first stage with four of these motors and on our second stage with one of these motors," Mr Gilmour said.

The main engine was constructed by a team of about 10 people at their factory on the Gold Coast, where the first prototype was developed 18 months ago.

"Longer than I hoped for, but at least we are there now," Mr Gilmour said.

In a test earlier this year, the hybrid rocket engine almost qualified when it reached a full thrust of 110 kilonewtons or 25,000 pounds force.

But the test was cut short after concerns a sensor was getting too hot.

Five single-port hybrid rocket engines will help blast the rocket, named Eris, into space, playing a crucial part in the first and second stages of the launch.

Gilmour Space aims to launch the rocket into orbit from Bowen in north Queensland in 2023.

"We are now ready to go on and complete the vehicle and go for a launch attempt next year," Mr Gilmour said.

The rocket will also have a small satellite payload inside of it, where it will be sending signals back to the team on Earth.

"We are going to take some pictures of the Earth," he said.