Works mainly with development of liquid fuel engines.

The model also available with a fuel efficient engine based on Jonway's A380 platform,.

For example, liquid fuel engines turn out to be built from well-understood technologies, he said.

A low power Diesel or alternate fuel engine with an automatic transmission.

Measuring the power output of a top fuel engine directly is not always feasible.

This model was built in Brazil with flexible fuel engines.

A 20-second test firing of its three main liquid fuel engines is scheduled for June 13.

Powered with a fuel engine it can fly for up to 6 hours.

Manufacturers may move to flexible fuel engines, which would increase allowable ratios, but no plans are in place at present.

Bush was similarly disappointed with the automobile industry, which showed no interest in his proposals for more fuel efficient engines.