Balloon Missions

D-SEND#2 campaign 3

June 4, 2015
D-SEND#2 campaign 3

JAXA is conducting research for the next generations of aircraft. Their goal is to design a silent supersonic transportation system that is economically viable and eco-friendly for travels in the 21st century. The D-SEND project is composed of drop tests D-SEND #1 and D-SEND #2. In the first phase called D-SEND#1, two different axisymmetric bodies were dropped from a balloon, and the sonic booms, measured both in the air and on the ground, were compared with each other.

In the D-SEND #2 drop test, an experimental supersonic airplane (unmanned aircraft with no engine and capable of autonomous flight) designed utilizing JAXA’s proprietary low sonic boom design technology is dropped from a balloon at an altitude of 30 km. The unmanned aircraft will glide over the boom measurement systems at Mach 1.3 and a flight-path angle of 50 degrees, where the generated boom signature goes down vertically toward the systems. The sonic boom is measured by a series of boom measurement systems held at an altitude of 1km.

With D-SEND #2, JAXA aims to achieve the following goals.

  • Demonstrate the effect of low sonic boom design at the front and end of the fuselage
  • Establish low-boom wave acquisition technology
  • Verify the low-boom propagation analysis technology

General information D-SEND-2

Launch site Esrange Space Center
Launch date launched on July 24, 2015
Mass/kg 1 ton
Balloon size 311 500 m³ (11 M ft³)
Height ~30 km

Contact persons

Mr. Mikael Toyra, Project manager SSC, mikael.toyra@sscspace.com
Dr.Kenji Yoshida, Project manager JAXA, yoshida.kenji@jaxa.jp

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