General Dynamics Corporation's Gulfstream Aerospace unit is expected to unveil a new business jet on Tuesday, the Wall Street Journal reported, citing people familiar with the company's plans.

Gulfstream hasn't acknowledged the plans in a nondescript invitation for media and analysts to a  Tuesday announcement, the newspaper said, adding that several people familiar with the project confirmed it would involve the new plane.

Little is known about the plane, code-named "P42", and exactly what the jet will be called remains unknown, the newspaper said.

The P42 jets will aim for the so-called super large-cabin jet market. It will also target customers who may not need the endurance of Gulfstream's new $66.5 million G650ER, which can fly 7,500 nautical miles non-stop, the Journal said.

Gulfstream's new jet has been developed from scratch to eventually replace its best-selling G550 model and later the smaller G450, the Journal said, citing multiple people familiar with the company's plans.

Gulfstream representatives were not immediately available for comment outside regular US business hours.  -Reuters