Hey Dan,I can't answer the first question since I don't actually use SRM, but the calcs it does are pretty accurate--the real question will be how accurate/reliable is your construction? The safe thing to do, if you've never tested a motor before, is to start with a load cell that is capable of much more thrust than you anticipate your motor will produce, especially if/when it CATOs.
--Steve On 02/17/2015 09:35 AM, Dan Harrison wrote:
Hello ,I'm looking to find some info on using Richard nakka's srm. Is there a way to change the nozzle throat size to match my motor? I tried using the nozzle erosion box but I'm not sure if that is the right way to do it. How accurate is srm ? I realize there are a lot of variables .but generally speaking if it calculates 25 lbs max thrust is that usually close to what it will measure on a test stand? The reason I ask is I'm building a test stand and I want to make sure I put the correct load cell on for my first test. Thanks, Dan