Description: Being offered is this RARE AND LARGE 8" LONG AND OVER 1" IN DIAMETER, Space Shuttle SRB Main Parachute Release Bolt ONLY, for the X-38 Prototype Crew Return Vehicle Program. Paperwork (Copies will be provided, but Original Paperwork is Not Included), shows it was for the X-38 Deorbit Propulsion Stage. The Bolt comes in its original packaging and have never been used.These are ITAR Restricted Items and can not be shipped outside of the USA. THE NUT IS SHOWN FOR REFERENCE ONLY. Originally designed as part of the recovery system for the Space Shuttle Solid Rocket Booster, The main chutes are released from the SRB at impact using the parachute release nut ordnance system.Space Shuttle Solid Rocket Booster - Function - Descent and RecoveryDescent and RecoveryThe SRBs are jettisoned from the shuttle system at 2 minutes and an altitude of about 146,000 feet (44.5 km). After continuing to rise to about 220,000 feet (67.1 km), the SRBs begin to fall back to earth and once back in the atmosphere are slowed by a parachute system to prevent damage on ocean impact. A command is sent from the orbiter to the SRB just before separation to apply battery power to the recovery logic network. A second, simultaneous command arms the three nose cap thrusters (for deploying the pilot and drogue parachutes), the frustum ring detonator (for main parachute deployment), and the main parachute disconnect ordnance.The recovery sequence begins with the operation of the high-altitude baroswitch, which triggers the pyrotechnic nose cap thrusters. This ejects the nose cap , which deploys the pilot parachute . Nose cap separation occurs at a nominal altitude of 15,704 ft (4,787 m), about 218 seconds after SRB separation. The 11.5 ft (3.5 m) diameter conical ribbon pilot parachute provides the force to pull lanyards attached to cut knives, which cut the loop securing the drogue retention straps. This allows the pilot chute to pull the drogue pack from the SRB , causing the drogue suspension lines to deploy from their stored position. At full extension of the twelve 105 ft (32 m) suspension lines, the drogue deployment bag is stripped away from the canopy, and the 54 ft (16 m) diameter conical ribbon drogue parachute inflates to its initial reefed condition. The drogue disreefs twice after specified time delays (using redundant 7 and 12-second reefing line cutters), and it reorients/stabilizes the SRB for main chute deployment. The drogue parachute has a design load of approximately 315,000 lb (143,000 kg) and weighs approximately 1,200 lb (540 kg).After the drogue chute has stabilized the SRB in a tail-first attitude, the frustum is separated from the forward skirt by a pyrotechnic charge triggered by the low-altitude baroswitch at a nominal altitude of 5,500 ft (1,700 m) about 243 seconds after SRB separation. The frustum is then pulled away from the SRB by the drogue chute . The main chute suspension lines are pulled out from deployment bags that remain in the frustum. At full extension of the lines, which are 203 ft (62 m) long, the three main chutes are pulled from their deployment bags and inflate to their first reefed condition. The frustum and drogue parachute continue on a separate trajectory to splashdown. After specified time delays (using redundant 10 and 17-second reefing line cutters), the main chute reefing lines are cut and the chutes inflate to their second reefed and full open configurations. The main chute cluster decelerates the SRB to terminal conditions. Each of the 136 ft (41 m) diameter, 20-degree conical ribbon parachutes have a design load of approximately 195,000 lb (88,000 kg) and each weighs approximately 2,180 lb (990 kg). These chutes are the largest that have ever been used -- both in deployed size and load weight. The RSRM nozzle extension is severed by a pyrotechnic charge about 20 seconds after frustum separation.Water impact occurs about 279 seconds after SRB separation at a nominal velocity of 76 feet per second (23 m/s).
Price: 95 USD
Location: Englewood, Colorado
End Time: 2024-12-15T15:10:55.000Z
Shipping Cost: 15 USD
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Item Specifics
All returns accepted: ReturnsNotAccepted
Exploration Missions: Space Shuttles
Theme: Astronauts & Space Travel
