Despite postponing the first flight of its 787 Dreamliner, Boeing is continuing pre-flight tests on its first two 787s.

Boeing’s Randy Tinseth posted video of the second 787 engine run on his blog.

And the company is putting its first Dreamliner through final gauntlet tests before progressing on to low speed taxiing.

Boeing still hasn’t given a new schedule for first flight.

Today, analyst Howard A. Rubel of Jefferies &Co. Inc. reduced his 787 delivery projection for 2010. Rubel adjusted estimated deliveries to 18 from 24 with a three month delay.

That’s a more positive assessment of the latest delay than others on Wall Street are suggesting. Morgan Stanley sees no deliveries until 2011.