joepolicy
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- May 23, 2004
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I am just finishing up a PML Tethys and I was test fitting the nose cone in to the Qunatum tube when I noticed that I could not get it in much past the first ridge. I do have a vent hole below where the shoulder is, so it is not a pressure problem. Even with the nose cone inserted 1/2 way, I could easily pick up and shake the rocket (which is at about 10 pounds) with no slippage from the nose cone. It absolutely would not go past the second ridge, even with some force. I had protected the inside of the QT with masking tape while finishing, there is no residue inside the tube. In fact, the piston slides in and out with no problems or hangups.
The only way the nose cone would even fit into the BT was to remove both ridges completely from the shoulder. Since I have not yet entered world of HPR yet (the Tethys will be my L2 attempt), and I am not familiar with the ejection forces from the Pro38 J285 I plan to use, I would like to know how tight is too tight on an HPR? With both ridges gone, the nose cone slides in easily, but now seems a little loose. I can turn the rocket upside down and the nose cone slides out about 1 inch - not all the way. Is this acceptable or should I added a little masking tape for a somewhat tighter fit?
Thanks!
The only way the nose cone would even fit into the BT was to remove both ridges completely from the shoulder. Since I have not yet entered world of HPR yet (the Tethys will be my L2 attempt), and I am not familiar with the ejection forces from the Pro38 J285 I plan to use, I would like to know how tight is too tight on an HPR? With both ridges gone, the nose cone slides in easily, but now seems a little loose. I can turn the rocket upside down and the nose cone slides out about 1 inch - not all the way. Is this acceptable or should I added a little masking tape for a somewhat tighter fit?
Thanks!