<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>So basically it cannot be throttled during the flight as I said... The throttling has been built in when the SRB is manufactured. What I'm trying to say is that pilots or ground controllers or computers cannot modify the throttle during the flight. <br />Posted by Zipi</DIV><br /><br />"Throttle" Definition from Merriam-Webster:</p><p><span class="sense_label start">2 a</span><span class="sense_content"><strong>:</strong> to decrease the flow of (as steam or fuel to an engine) by a valve</span> </p><p><span class="sense_label">b</span><span class="sense_content"><strong>:</strong> to regulate and especially to reduce the speed of (as an engine) by such means</span> </p><p><span class="sense_label">c</span><span class="sense_content"><strong>:</strong> to vary the thrust of (a rocket engine) during flight</span><span class="verb_class"><em>intransitive verb</em></span><span class="sense_content"><strong>:</strong> to throttle something (as an engine) —usually used with <em>back</em> or <em>down</em><span class="vi"><the pilot <em>throttled</em> back></span></span></p><div class="run_on">— </div><div class="run_on">So if you use def c, the SRB design applies. The more common definition is a and b which would apply to the Main Engines.</div><div class="run_on">In a way it's similar to the ice going away thing on Mars. While "evaporate" technically applies, "sublimate" specifically refers to solid to gas phase transition, so fits better.</div> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>