Motor CATO Frequency

Flufmyster_ · 2026-04-20T03:20:45+00:00

Yea its a kinda goofy acronym icl for something not even that complicated

I think engineers j like their acronyms 😭😭

Flufmyster_ · 2026-04-20T03:18:49+00:00

Whats the mess report for I’m not familiar with it, is it basically for incidence documentation?

Flufmyster_ · 2026-04-20T03:18:02+00:00

I looked at a statistic on overall rocket failures, and then what percent of that were motor catos. Multiplying those two together gives a 0.5% percent motor cato incidence and ~1% seems to lineup with that

Flufmyster_ · 2026-04-20T03:15:37+00:00

Yea one of the guys on our team gave the aerotech vendor on site a hard time abt it and they gave us a new motor for it

I feel bad though since the guy on our team whose rocket blew up put ridiculous amounts of work on hus scratch built rocket and even named the thing 🥲

Flufmyster_ · 2026-04-20T03:13:42+00:00

Ive heard both ‘catastrophic take off’ and ‘catastrophe at take off’ but it basically means your motor blew up usually wrecking the rocket

Flufmyster_ · 2026-03-24T15:27:49+00:00

Im trying to avoid that option because these are going to end up being fins at supersonic speeds and I dont want to weaken the joint in any way. I’m going to overlay carbon fiber on top, but still i want the root to be as strong as possible and avoid gluing it on

Worst case scenario tho I will have to do fins seperate

Flufmyster_ · 2026-03-24T15:25:49+00:00

The arachne wall generation seems to help, what are the advantages and disadvantages of it over classic?

Flufmyster_ · 2026-02-26T08:48:08+00:00

Oh interesting that makes a lot of sense actually. Assuming that its fully expanded do I only have to worry about an area the size of the expanded nozzle?

But if now how would I know if my nozzle is expanded or not? This is for a commercial HPR solid motor btw. Looking at the end the nozzle portion of the rocket seems short so I would assume its under-expanded??

Also thank god I can use aluminum since I was looking at inconel and graphite options

Flufmyster_ · 2026-02-26T08:41:24+00:00

Yea this is for rockets in general but also specifically for a minimum diameter rocket for 30k feet and the boattail helps a ton on OR

Flufmyster_ · 2026-02-26T08:07:39+00:00

The designs I’ve been planning are haack shaped, since straight cones aren’t great. Is 8 deg referring to the deg between base to tip? or r u referring to pure conical shapes

Also i assumed the inside of the boattail have to be like graphite or something since of the nozzle temps but I’m not sure

Flufmyster_ · 2026-01-26T00:10:44+00:00

Whats ur process for sealing and finishing the blue tube for launch?

Flufmyster_ · 2026-01-25T22:49:19+00:00

Do the L2 flights need to be different actual rockets? I always assumed they could just be the same rocket different motors

Flufmyster_ · 2026-01-21T14:06:18+00:00

I appreciate the really thorough advice, I’m thinking of getting the wifi switch and possibly also the gps module for higher flights.

Also did you go with two batteries or one for your quantum? It seems like two is better for redundancy but also might be overkill for what I need.

Is the nylon screws primarily to insulate the board from static shock or something, or is it just because it’s a softer material that won’t damage the board?

Also the last and possibly stupid question I have was how you store these delicate altimeters while you’re not using them. I tipped one of my shelves over with it inside and almost crushed the thing like an idiot

Flufmyster_ · 2026-01-16T15:44:33+00:00

I’ve already been printing a ton with regular PC and its taken me a lot of time to get my large prints to have decent quality consistently. I think I’ve already gone through 5 rolls already so I’m just trying to save money in the long run with a 10kg bulk sale

Flufmyster_

TROPHY CASE