tag:blogger.com,1999:blog-7598615455712402973.post9095647812664978074..comments2024-03-25T11:14:45.840-04:00Comments on Polymath: Altitude compensation attachments for standard rocket engines, and applications, Page 5: metal foil expandable nozzles.Robert Clarkhttp://www.blogger.com/profile/16114043697010364282noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-7598615455712402973.post-60023948441937471782017-08-12T20:43:49.018-04:002017-08-12T20:43:49.018-04:00 It could use the fuel to provide the cooling as w... It could use the fuel to provide the cooling as well as the expansion force.<br /> Another possibility is that exhaust gas cools as it expands. Since this is envisioned as an attachment to the usual sea level nozzle, the gas would have cooled as it reaches the attachment so reduced levels of cooling would be required.<br /> However, the attachment simply being in contact with the main nozzle would also cause it to become hot from conduction. Then we could use heat insulators between the main nozzle and the attachments to limit this heat transfer.<br /><br /> Bob Clark Robert Clarkhttps://www.blogger.com/profile/16114043697010364282noreply@blogger.comtag:blogger.com,1999:blog-7598615455712402973.post-52872346675394900012017-08-03T20:01:58.659-04:002017-08-03T20:01:58.659-04:00If I understand correctly, the foil would act as a...If I understand correctly, the foil would act as a nozzle skirt?<br /><br />How would it handle the heat load?Matter Beamhttps://www.blogger.com/profile/16721504049578296529noreply@blogger.com