Interesting suggestion, Jeff. I am not aware of any sugar motor that has ever used an aerospike nozzle. As Bill pointed out, the fact that a large percentage of the exhaust is condensed phase (44%, to be exact), may result in reduced performance compared to a regular nozzle. But might be worth investigating. Perhaps some testing can be done with the new experimental VIC-2 motor...which is intended for "miscellaneous" type experimentation. Richard On Wed, Jan 15, 2014 at 8:10 PM, Jeff Moore <tnetcenter@xxxxxxxxx> wrote: > > I'm wondering if any consideration has been given to the use of aerospike > nozzles in our endeavors? Seems to me that there is a significant > performance bump using this nozzle design as well as a significant reduction > of base drag. I doubt if anyone has used an aerospike nozzle on a sugar > motor either - we'd be breaking new ground! > > Might be worthwhile to take a closer look at! > > Jeff Moore > Bend, Oregon > > On Wed, Jan 15, 2014 at 3:24 AM, <monsieurboo@xxxxxxx> wrote: >> >> After reading that superb report of the latest static test, it seemed >> appropriate to cross-post this link that just showed up on the arocket list. >> Great single-page source for some document downloads on issues that are >> quite topical for our current phase of development and testing. >> >> http://www.rasaero.com/dl_solid_motor.htm >> >> My intent in posting this is not in the least to be critical. Au >> contraire, I have nothing but kudos for our testing program and team. This >> is just some very interesting reading that's worth saving in a MOTOR_DESIGN >> folder somewhere in a hard disk archive. >> >> "Departures from Ideal Performance", for example, seems relevant to our >> quest of trying to maximize the performance of our <cough> inherently >> mediocre fuel <cough, cough, grin> >> >> Enjoy! >> Mark L. >> DC >> >