1、Lessons Learned Entry: 0547Lesson Info:a71 Lesson Number: 0547a71 Lesson Date: 1996-06-01a71 Submitting Organization: LARCa71 Submitted by: Ruth M. AmundsenSubject: Requirement for Stalled-Rotor Power in Worst-Case Thermal Analysis Description of Driving Event: On the MIDAS project, thermal analysis
2、 for the Shuttle locker payload was performed without the fan in the locked rotor condition (maximum heat dissipation).Lesson(s) Learned: Worst-case thermal analyses must include locked-rotor conditions of any moving parts.Recommendation(s): Whenever the thermal analysis is supposed to be worst case
3、 or include component failure, make sure that any fans or rotating parts included stalled failure power (power that a stalled rotor draws), and not just a normal worst-case maximum power.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): N/AProv
4、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Additional Key Phrase(s): a71 Hardwarea71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 1997-05-05a71 Approval Name: Elijah C. Kenta71 Approval Organization: 421a71 Approval Phone Number: 757-864-3345Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
