We had a sucessful weekend flying the Tachyon sustainer. We wanted to test it as a single stage first to make sure it will perform as expected when it is boosted by Acceleron III.
The full details of the flights can be found here:
A video is included in the update that shows the highlights of the day.
We are now just finishing the Acceleron flight computer (V1.4) and should be ready to do some end to end testing of Acceleron III systems fairly soon. Once all the tests have been successfully completed, the two stage rocket should be ready to fly.