This mission puts you at the end of Runway 26 at Boulder Municipal Airport (1V5). There are a few interesting tidbits to note before you take off. First is that this field is 4,100 feet long. OK, we can hear you saying now, "4,100 feet? That's not short." Maybe it's not short for the Cub, but you're in a fully loaded Baron at an elevation of 5,400 feet MSL.
There are quite a few buildings at the departure end of this runway, not to mention those mountains in the distance. Suddenly, 4,100 feet seems kind of scant. Let's see how you do. The procedure will be to hold the brakes and run each engine up to 2000 rpm. Lean the mixture to get peak power (peak rpm, fuel flow, or EGT). Then go full power, and release the brakes.
Ref.: West, Jeff Van. Microsoft Flight Simulator X For Pilots: Real World Training. Wiley. Kindle Edition(Location 11985).