{"id":569,"date":"2009-10-07T00:09:20","date_gmt":"2009-10-06T22:09:20","guid":{"rendered":"http:\/\/www.verticallimits.nl\/?page_id=569"},"modified":"2015-02-18T18:10:00","modified_gmt":"2015-02-18T16:10:00","slug":"nero-launch-day-03-10-2009","status":"publish","type":"page","link":"https:\/\/www.verticallimits.nl\/?page_id=569","title":{"rendered":"NERO Launch Day 02-10-2009"},"content":{"rendered":"

Set up on the tower went without any problems. The azimuth was set at 26,5\u00b0 and with an elevation of 84\u00ba. Weather was fair and\u00a0around 13\u00b0 Celcius. The whole morning it was raining with every now an then some dry periods. They was little wind although it pick up a bit during the rain. We missed\u00a0a small window of blue sky\u00a0because prepping the rocket in the field took a bit\u00a0longer then expected. Luckily the KaDi-car stopped by frequently and was serving hot coffee & sandwiches.<\/p>\n

Around 12:00 rocket prep was finshed. The igniter was inserted into the motor and the DECA rocket was launched after a 10s count down. The engine start up took longer than expected\u00a0but the rocket left the launch rail straight and\u00a0fast. After the apogee “pop” it came down as designed. The rocket was seperated at the motor coupler\u00a0and was connected to\u00a0the rest of the rocket\u00a0with\u00a05m tubular\u00a0kevlar and a\u00a0swivel in between.\u00a0The drogueless \/ tumble recovery design worked perfectly reducing\u00a0the horizontal\u00a0velocity (which has plagued us so many times in the past)\u00a0to an absolute minimum. At 300m the nose cone popped off and the main chute deployed immediately.\u00a0The rocket landed\u00a0within 300m\u00a0of the launch rail and was recovery without a scratch.<\/p>\n

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Filmed by OB. In the heat of battle I forgot my camera down where the rocket was. The pops which can be heared on the back ground are rain drops falling on a umbrella. There is approximately 1sec time difference between lift off and the sound reaching the camera due to the fact that the rocket is approximately\u00a0300m away.<\/p>\n

The RDAS Tiny beepd out the apogee at 1031m which was less than expected. We had estimated the Cd a bit to optimistic and did not take into account the skin drag of the long and slender rocket. In hind sight Aerolab simulated an average\u00a0Cd of 0,75 which was confirmed\u00a0by the flight analysis of BO.<\/p>\n

Although the DECA \/ H14a was the only rocket which was launched by the NERO,\u00a0it was a complete succes. See will be launched again next year maybe as a\u00a0two stage rocket serving as the sustainer.\u00a0 The launch day was combined with the\u00a0NAVRO which preformed\u00a0a motor test and some launches. Definiately looking forward to\u00a02010\u00a0again. It is a good feeling driving home with a safely recovered rocket\u00a0rather than picking up the pieces and start all over again.<\/p>\nngg_shortcode_0_placeholder\n","protected":false},"excerpt":{"rendered":"

Set up on the tower went without any problems. The azimuth was set at 26,5\u00b0 and with an elevation of 84\u00ba. Weather was fair and\u00a0around 13\u00b0 Celcius. The whole morning it was raining with every now an then some dry periods. They was little wind although it pick up a bit during the rain. We<\/p>\n

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