The World's Most Expensive Biplane
The space shuttle had to land at Edwards AFB in California last week due to weather, so they had to get it back to Florida via the piggy-back method. I watched it on CNN, and was struck by how cool it was. I’ve seen it before, of course, but you kind of take it for granted.
However, I found myself wondering if the 747 gets any extra lift from the wings on the shuttle. I know the drag and weight are a problem, but you do have two extra wing surfaces now, so do those help at all? With the shuttle on top, it’s like the world’s most expensive bi-plane.
The Wikipedia page for the Shuttle Carrier Aircraft had some interesting information:
Flying with the drag of the Orbiter imposes fuel and altitude penalties - the range is reduced to just over 1000 nautical miles (1900 km) compared to an unladen range of 5500 nautical miles (10,000 km), requiring a SCA to stop several times to refuel on a transcontinental flight
Wow, an 80% reduction in range and they can’t refuel in flight.
It takes a crew of about 170 a week to prepare the shuttle and SCA for flight, and each transcontinental trip costs about $1.7 million.
Yikes.
Still, I have no information on whether or not the wings of the shuttle provide the entire, two-vehicle apparatus with any net increase in lift. Opinions, anyone?

