<blockquote><font class="small">In reply to:</font><hr /><p>Copper must be in use for these tests since copper gives off a green flame. The use of copper in these early injector tests does not mean copper will be used in the production engine. <p><hr /></p></p></blockquote><br /><br /><br />The injector itself looks like stainless steel from the video. The flame looks green on the initial hot fire but then looks like the normal blue in subsequent shots. <br /><br />There probably some impurities in the flowpath for the first shot, that could explain the green flame, or just the way sunlight & camera effect from that angle.<br /><br /> <div class="Discussion_UserSignature"> </div>