Designing a Rocket Motor - Build a KNSB (Sugar) Rocket Motor - Part 1 

I love that you get right to it, pure education and learning! This is what I’ve been searching for

Have you ever tried a profile for a nozzle that’s based on a CPC (Compound Parabolic Concentrator, or Winston Cone). These are used in optical systems to take 2 pi steradians input on the small end and convert it to +- theta on the large end. Theta being dependent on the design of the CPC. So if the thrust coming out of the rocket (before nozzle) is 2 pi steradians, you can design a CPC nozzle that converts that thrust to a smaller angle, effectively converting the sideways thrust more downwards. Just a thought. I like seeing how things from one field of science can be used in another field. A straight cone is ok, but a CPC would eliminate the need for the converging part of the nozzle before the pinch and reduce the overall length. I’ll try to find some CPC design references for you. Paul

You can CNC a negative CPC in aluminum and then nickel plate it. Pops off with an air hose. Optiform makes them. You can get many out of one mandrel. I’ve made some that are 3” diameter and 400 mm long. Diamond turned an aluminum mandrel in aluminum and NASA electroformed them in a thin shell of nickel. But they used liquid nitrogen to release the nickel shell.

Looking pretty good! Can't wait to see this in action!

Happy New Year to you and your crews, May God bless you all. Thank you so much for your program of videos from RU-vid, proud of you, your great and share for your knowledge.

Nice graphics and put together video...people have been asking me to do an instructional on sugar motors for years.

Hello Minute Rockets, Very cool. Thank you kindly. I've subbed and liked the video.

Awesome

Love your work! Great to see some awesome design engineering! Are you going to make these spreadsheets and models public? :D

Very well done video with great graphics. Now do a real test burn!

Hello Minute Rockets, By the way, I accidentally happened upon your video here and by watching it reminds me that I had already purchased Richard Nakka's CD

Fantastic series. Can you share your CAD drawings? I’m trying to teach myself free cad

so .if i make a 38mm diametre motor with six 2.25 inches grains with 9/16 inches core and four 2.25 grains with1/2 inch cores,why there is a difference in cores and what may or may not happen if all the six core sizes are 1/2 inches each?

Would it be possible to put the plans in the description ?

any chance we can get this excel book ._.

When are you going to machine it

Can you make a link for this exel ?

Can you write the dimensions of the nozel please?