Clean lines, sweeping wings and wide oval windows: Gulfstream's G700 is among the most eye-catching aircraft at the Singapore Airshow, Asia's largest aviation and defence trade fair.

Parked in a quieter corner of the tarmac, away from passenger jets and bulky military aircraft, it has drawn long queues of visitors waiting in the heat for a glimpse inside - a sign of the enduring interest in one of the world's leading private jet manufacturers.

The lines move slowly. Sales conversations are still taking place on board, as customers consider aircraft that can cost tens of millions of dollars.

Step inside and the appeal is immediate. Light streams in through almost panoramic windows onto pale leather seats and polished wood veneer.

Staff describe the cabin as having "living areas": one with a sofa and TV console, while at the rear, a bedroom they call a "grand suite with a shower."