#21
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The nosecone to my MX-774 looks like injection mold, as it's pretty thick. It came in two parts; the cone and the base/adapter section that had to be glued with plastic cement. As I said, I was disappointed when I saw the plastic nosecone as I really wanted one that was sharply pointed. Maybe one of these days I'll get an equivalent balsa cone from SEMROC to compensate.
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Dave, NAR # 21853 SR. |
#22
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Yes, I think I recall seeing those recommended engines (the 13 mm ones) in those later Centuri catalogs. Coupled with the sleek style and boat tail the MX-774 has, I knew it'll be an easy high flyer. That's why when I flew her at NSL-2004 (Hearne, TX) I used the Quest A6-4 (I was just getting back into model rocketry then after a 22 year absence) to keep it low, but those Quest engines ejection charges shot a lot of black soot that marred the white finish to the upper body tube of my model. But you're right, I think the 1/2A's 13 mm from Estes should be a good choice.
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Dave, NAR # 21853 SR. |
#23
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If Semroc doesn't already make it (they *do* make a balsa copy of the injection-molded PNC-89 for their Centuri Spartan kit, see: http://www.ninfinger.org/rockets/ca...75rt/75rt8.html ), they (or Sandman) could make a custom sharp-pointed BNC-89 for your MX-774.
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#24
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__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#25
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If I use the A8, I'd go with the A8-5 delay. I know they're hard to find in most retailers, but we have a local mail order vendor who has an excellent selection of Estes/Quest/AT engines that I can order from and get extra fast service (http://www.launchpad2000.com/). By local, I mean here in the Houston area where I live, but they take orders from anywhere......
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Dave, NAR # 21853 SR. |
#26
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Mine is the two piece, orange nose/white shoulder as well. |
#27
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The one that came with mine was all red, including the base and base plug.....
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Dave, NAR # 21853 SR. |
#28
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__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR Last edited by blackshire : 08-06-2010 at 08:37 PM. Reason: This ol' hoss done forgot somethin'. |
#29
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Quote:
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR Last edited by blackshire : 08-06-2010 at 08:34 PM. Reason: This ol' hoss done had to correct a typo. |
#30
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Bumping an old thread I know...
First, I have been comparing the G. Harry Stine MX-774 drawing to Pete Alway's ROTW drawing and have a question. I think I am mis-interpreting the ROTW drawing: is the end of the cylindrical body/start of the ogive at STA 174.15, or is that just showing the end of the cable channels? G. Harry's drawing seems to indicate the top of the cylinder is the top of the black stripe (which would translate to STA 154.1 if I did my math right ) Second, while searching for some higher resolution pictures to answer my question above, I came across a thread on nasaspaceflight.com about gimbaling engines, and somebody posted a nice article on the early Atlas history from Spaceflight magazine. The article is in this link -- I have contacted the author about availability of any hi-res pics, especially on the launch pad. |
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