You can also find this method a lot in the Australian Rocketry Forums. They do it all the time for their scratch built projects.Sketch out the curve, build with foam, cut with hotwire, cover with fiberglass.
I think John Coker had a video on it.
something like https://www.youtube.com/watch?v=5mUKQ7CUd8I , in which he does a transition
Ah. Those were the days. No CAD, no internet. Such simple times. Thank goodness for progress. I am so glad we have CAD and internet nowAhem - CAD is optional.
- Signed: Guys (and gals) who made things before CAD
There's already an excellent excel spreadsheet for that:...
If you don't have a lot of fancy software and printers, then there is a wikipedia page; https://en.wikipedia.org/wiki/Nose_cone_design that has all of the formulas. You can take that, stick it into excel, plot the curve, print it to scale, cut it out and now you have the profile to carve a foam mold to like what is outlined in the Jon Coker video discussed earlier.
what's better for 4'' D and 20 Length >>> make a mold use a wood plug and layup fiberglass fiber inside it , OR use a Foam as shape with fiber clothI've used that process to successfully fabricate a LV-HAACK nosecone.
If you don't have a lot of fancy software and printers, then there is a wikipedia page; https://en.wikipedia.org/wiki/Nose_cone_design that has all of the formulas. You can take that, stick it into excel, plot the curve, print it to scale, cut it out and now you have the profile to carve a foam mold to like what is outlined in the Jon Coker video discussed earlier.
4 inch sorry. I think foam way will be easier but how can i shape the foam ? Just hot wire ?Oh, and did you mean four foot diameter or four inch diameter?
It's my first time to manufacturing a Rocket but i hv a good theoretical backgroundCan you tell us your experience with rocketry so we can describe the processes according to your skill level?
This shows one way to do it: https://www.apogeerockets.com/education/downloads/Newsletter87.pdfhow can i shape the foam ? Just hot wire ?
You know, I linked to that exact article in my post as well.This shows one way to do it: https://www.apogeerockets.com/education/downloads/Newsletter87.pdf
LOL! Maybe it depends on motor size? That would help define the thickness of the tube which in turn would help with the shoulder thickness/step which could dictate the material to start with? Somehow the mass of the nosecone relates to the size of the chute. Or are we figuring internal volume? Solid or hollow? Hmmmm-expiring minds need to know.........Depends, how big is the parachute for recovery?