Today the Low Density Supersonic Decelerator or LDSD was to take its voyage today, however, it appears the Hawaiian winds are not going to co-operate today.
I’ve said things like this before just to find out I was wrong and I’ve not heard for sure that things have been called off. The news I have is from last evening. Yes canceled for today – 11 June is the target.
You can see by the cartoon depiction of the test flight why the winds could influence the flight.
The LDSD is going to be lifted by balloon (so cool) to an altitude of 36,600 meters (120,000 feet). That part of the trip is supposed to be about three hours.
After the LDSD is cut loose from the balloon it will be “spun up” by small rocket motors. The spin is for stability during the test. The the main onboard rocket will boost the craft to an altitude of 54,900 meters (180,000 feet) which is the upper stratosphere.
About the time the LDSD reaches the maximum altitude it will be traveling nearly Mach 4. Now comes the deployment of the Supersonic Inflatable Aerodynamic Decelerator or SAID for short resulting in a slowing of the LDSD to Mach 2.5. Once the vehicle is slowed the Supersonic Disk Sail Parachute, a giant parachute will bring the LDSD to nice safe and controlled landing in the ocean where everything can be picked up.
Once the test vehicle is released from the balloon time to touchdown will be about 40 minutes.
If the flight does not take place today and I’ll update this post one way or the other, there are plenty of alternate dates starting with Wednesday, 11 June.