Military Photo: 1929 Mid-Air Refueling

Posted: 12/01/2008

A Fokker C-2A is refueled in flight by a modified Douglas C-1 transport aircraft during an operation dubbed "Question Mark" in 1929. A large question mark was painted on each side of the receiver aircraft's fuselage, intended to "provoke wonder at how long the aircraft could remain airborne," according to Air Force historians. The Douglas C-1 aircraft were transformed into aerial refueling tankers by installing two 150-gallon tanks for offloading and a refueling hose that passed through a hatch cut in the floor of the aircraft. During the operation, which began on New Year's Day in 1929 and ended 150 hours and 40 minutes later on Jan. 7, the two Douglas refueling aircraft passed 5,660 gallons of fuel, completing 43 sorties, 12 of which occurred at night. (U.S. Air Force photo)

Photo Archive

Military Photo Archives: Current  2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004



Help Keep Us Soaring

We need your help! Our subscription base has slowly been dwindling. We need your help in reversing that trend. We would like to add 20 new subscribers this month.

Each month we count on your subscriptions or contributions. You can support us in the following ways:

  1. Make sure you spread the word about us. Two ways to do that are to like us on Facebook and follow us on Twitter.
  2. Subscribe to our daily newsletter. We’ll send the news to your email box, and you don’t have to come to the site unless you want to read columns or see photos.
  3. You can contribute to the health of StrategyPage. A contribution is not a donation that you can deduct at tax time, but a form of crowdfunding. We store none of your information when you contribute..
Subscribe   Contribute   Close