#21
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It is somewhat surprising that does not happen more with The Launch Pad kits. Most of their motor mounts are recessed. Bill |
#22
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That's the rule I remember, but I didn't know how big the tube was on a Sat V. Even so, 3 3/8 seems like a lot. I've never seen the Krushnic effect occur, but it might be cool to see. (In a twisted rocket destroying sort of way. )
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Dave Fire is the leading cause of fire. Was once SAM#0132 |
#23
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It has happened to me with my Upscale Centuri Point which is nothing more then a big paper cone. Nothing better then seeing a D12 motor thrusting away while the rocket sits on the pad turning brown from the inside out. The only thing left was the nose cone.
John Boren |
#24
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Sounds funny to watch in person....unless it happens to me.
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I love sanding. |
#25
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That happened to my (regular sized) Centuri Point in the mid 1970s. If I remember correctly, the Semroc instructions said to raise it above the blast deflector. The Centuri instructions didn't mention this. Mine was set down flat on an Estes round blast deflector, the deflector diameter was a little wider than the base of the Point. It was almost like there was "suction" holding it down to the launcher. The Centuri blast deflector was angled, not flat. My mother would take me to the ranch to fly rockets back then. I can still hear her laughing when it caught fire. She sarcastically said: "Well, that was different". The Point - "Build it - Watch it fly - And wonder why!" Then go home
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Hans "Chris" Michielssen Old/New NAR # 19086 SR www.oddlrockets.com www.modelrocketbuilding.blogspot.com http://www.nar.org/educational-reso...ing-techniques/ Your results may vary "Nose cones roll, be careful with that." Every spaceman needs a ray gun. Look out - I'm the Meister Shyster! |
#26
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The Point -
"Build it - Watch it fry - And wonder why!" |
#27
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I bought a Semroc point (never knew the history of it till recently) to round out my Xmas order. Im going to pull it down and build it. I find the FRY potention appealing in a weird sort of way.
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#28
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I made some progress on the build.
The third stage components have been assembled. The only change I made was that I used Kevlar cord on the third stage centering ring instead of a doubled up piece of line called for in the instructions. I'm filling spirals now. The L.E.M. components have been assembled. I'm filling spirals now. The nozzles have been assembled, primed, and are being painted. I figure anywhere I can get a jump on any of the painting I'm going to do that along the way. All wraps have been cut out, and that took a LONG time... I still have to do a bit of sanding before I apply them to the tubes. Now I just need to pickup the glues I need to attach the wraps so I glue them in place.
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I plan ahead that way I don't have to do anything right now. Oh by the way, I'm not here just for the "olde" rocket discussions. |
#29
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Looking good! Are you going to put Sandman's SM wrap on it?
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Never trust an atom. They make up everything. 4 out of 3 people struggle with math. Chemically, alcohol IS a solution. NAR# 94042 SAM# 0078 |
#30
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What did you finally decide to do with the motor mount position? If you are concerned about burning, consider taping a protective strip of printer paper or even aluminum foil around the inside the tube.
Bill |
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