Hi Mattias, It would be great if you could you do this. I think the maximum thrust is 2000N, but better than Richard confirm it. Vicente Alvero From: mattias.lampe@xxxxxxxxxxx To: sugarshot@xxxxxxxxxxxxx Date: Sat, 18 Jan 2014 10:37:27 +0800 Subject: [SS2S-Main] Re: Interesting Motor-Design Documents If you want to go even cheaper, load cells can be scavenged from cheap digital kitchen/bathroom scales. It’s not too difficult to hook them up to a computer. I can probably help with the electronics, but not so much with the mechanical part. What would be the maximum force to be measured? Mattias From: sugarshot-bounce@xxxxxxxxxxxxx [mailto:sugarshot-bounce@xxxxxxxxxxxxx] On Behalf Of vicente Alvero Zambrano Sent: Friday, January 17, 2014 12:47 AM To: sugarshot@xxxxxxxxxxxxx Subject: [SS2S-Main] Re: Interesting Motor-Design Documents Instruments would be a gauge and load cell, right? but this must be commercial. some sets is "cheap". with relative to a support, I think we would have problems. that would be cheap. http://aeroconsystems.com/cart/load-cells/ maybe we can also use the pressure gauge and load cell minisshot rocket. Date: Thu, 16 Jan 2014 10:30:00 -0600 Subject: [SS2S-Main] Re: Interesting Motor-Design Documents From: richard.nakka@xxxxxxxxx To: sugarshot@xxxxxxxxxxxxx To design/build the instruments to measure motor thrust and chamber pressure. We would have to do this on a "tight" budget. R. On Thu, Jan 16, 2014 at 10:18 AM, vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx> wrote: What kind of help with the instrumentation? From: vicente_alvero_14@xxxxxxxxxxx To: rickmaschek@xxxxxxxxxxxxxx Subject: RE: [SS2S-Main] Re: Interesting Motor-Design Documents Date: Thu, 16 Jan 2014 17:17:40 +0100 What kind of help with the instrumentation? Date: Thu, 16 Jan 2014 08:15:04 -0800 From: rickmaschek@xxxxxxxxxxxxxx Subject: Re: [SS2S-Main] Re: Interesting Motor-Design Documents To: vicente_alvero_14@xxxxxxxxxxx I already am building one for another sugar project, was going to suggest it for SS2S if it works. Rick From: vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx> To: "sugarshot@xxxxxxxxxxxxx" <sugarshot@xxxxxxxxxxxxx> Sent: Thursday, January 16, 2014 8:10 AM Subject: [SS2S-Main] Re: Interesting Motor-Design Documents that would be great, why not try.? > Date: Thu, 16 Jan 2014 09:54:39 -0600 > Subject: [SS2S-Main] Re: Interesting Motor-Design Documents > From: richard.rocketry@xxxxxxxxx > To: sugarshot@xxxxxxxxxxxxx > > 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 > >> > > >