Senior Space Cadet
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- May 23, 2020
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I didn't make a file, only a screen shot.If you share the Open rocket fIle, I will test it out this week. I might 3d Print a test bed.
3D print your nose cone. I do it all the time. Takes a few hours. And cheap. I take it you don't have a printer.I haven't given up on the original design, but I've pretty much decided that I'd have to make my own nosecone.
I see two ways of doing it and making it look right.
I did intend to stuff the chute and shock chord in the nose cone. Why won't that work?Also ... it looks to me like you have very little room in there for a streamer/chute. That one piece of body tube looks to be only a couple inches long.
stuffing the recovery into the nc won't work....
2 piece NC?
No, I don't have a 3D printer, but I will look into the option of having someone else do it. I'm pretty tech challenged, but maybe I can get it all figured out. Probably for a future build. I'm pretty far along on this one.3D print your nose cone. I do it all the time. Takes a few hours. And cheap. I take it you don't have a printer.
Not overly difficult to design/create the .stl file (3d print) from your .ork file
If you have an .stl file, you can have it printed from a commercial service for about $25 I think. Or easy enough to find someone here to do it for you. Me included.
Stuffing the nose cone WILL WORK, but will require some ingenuity. Definitely need a hollow plastic cone.I did intend to stuff the chute and shock chord in the nose cone. Why won't that work?
I'm going to glue a screw-eye in the tip of the nosecone. Plenty of room in there for the chute and shock-chord. It's 41.6 mm in diameter.
Because if your chute is in the NC, the ejection charge is going to pack it tighter into the NC. You need open space behind the laundry.I did intend to stuff the chute and shock chord in the nose cone. Why won't that work?
Another concern is gluing the fins on. Balsa fins, plastic tailcone. I'm going to use super glue to hold them in place initially, but I can't use yellow/white glue to make fillets. I guess the obvious solution is thickened epoxy. I'm not sure I still have any thickening agents left over from my boat build. I might have to order something before I can proceed.
Any other ideas besides thickened epoxy?
There are successful designs with the laundry stuffed into the nose cone. It's not ideal. The nose cone needs to have some substantial mass. (From what you have said about stability, some nose weight may well be in order anyway.) As it and the rest of the rocket are moving apart, each with a decent amount of inertia, they pull the shock cord out straight with the parachute in the middle.Because if your chute is in the NC, the ejection charge is going to pack it tighter into the NC. You need open space behind the laundry.
That's where it's at. I guess we'll see. As long as there is separation, and the rocket lands on grass, it'll probably survive.Kind of depends where on the shock cord you attach the chute, just make sure it is somewhere closer to the middle instead of all the way at the nose cone end.
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