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Calculating Density Altitude with a Pencil We all know that as density altitude increases, there is a corresponding decrease in the power delivered by our airplane’s engine and the effectiveness of our propeller. For a typical non-turbocharged light single-engine airplane, this can result in a takeoff roll that’s 25 percent longer for every 1,000 feet of elevation above sea level. The most dangerous combination of conditions are a heavy load, unfavorable wind, high temperature, high airport elevation and high humidity. With so many variables to consider, how are we supposed to know when our density altitude is too great for the conditions? We could use an E6B computer or an iPad app to calculate density altitude, but what if we accidentally left the flight computer and iPad at home? There sure is, and it’s a formula we as pilots should probably commit to memory. First off, what is density altitude? How do we calculate density altitude? Easy! density altitude = pressure altitude + [120 x (OAT - ISA Temp)] So, in the example above:

RunwayFinder - Aeronautical Charts - Flight Planning CSC DUATS Flightradar24.com - Live flight tracker! AMD Drivers Are Still Dead | X-Plane Developer Update: this driver bug has since been fixed – see here. If your X-Plane screen looks like this with HDR on, you may be running the new Catalyst 13-12 drivers. If you can, back up to the Catalyst 13-9 drivers to get back HDR mode. (If you have a really new AMD card, you might not be able to run 13-9 – in that case please turn off HDR until AMD has a fix.)

Flight Planning & Online Logbook | iFlightPlanner CIVA Navigation System Delco Carousel IV-A Inertial Navigation System. Nicknamed "CIVA", An inertial navigation system (INS) is a navigation aid that uses a computer, motion sensors and gyroscopes to continuously calculate via dead reckoning the position, orientation, and velocity of a the aircraft without the need for external references. it was easily the most popular inertial navigation system used before wide adoption of GPS became possible in the 90's. The CIVA could be found on 707, 727, some 737-100s and -200s, the DC-10 and L-1011 Tristar, and on the early 747-100, -200 and -300 variants. This CIVA has primarily been developed to be used with the 727 series of FlyJSim. Features Get the CIVA manual here Design by Philipp