Rocket rotating during ascent - what can I do?

[Spricigo]

2 hours ago, felcas said:

 I wonder...maybe I can make this one better too with everything I learned and the new techonology.   

Incurring the risk to spoiling the fun for you some things to consider, from the top of my mind:
 

Spoiler

 

-aerodynamic nosecones instead of tail cones (less weight, more drag. Seems to be a net gain to me. Stability may be a concern.)

-alternatively put everything inside a 2,5m fairing for the ascent. For re-entry drag is a good thing.

-possible replacing some of the command pods with crew cabins for weight reduction. Keep a pointed part on top of each stack.

-for the launch vehicle itself (stage 5 and below) I'd consider a main stack with Skipper engine and a pair of side-attached Thumpers, looking for a launchpad TWR over 1,7. (I design my launch vehicles to have a so easy that my cat can do it launch procedure. Lower TWR make it trickier)

-The LFO tank have the highest priority, decouplers with fuel crossfeed enabled . Just enough Liquid fuel/oxidizer on top of SRB's to maintain the main engine while the SRBs burn.

 

BTW, I prefer this upper stage instead of the 2,5 variant.

[felcas]

1 hour ago, Spricigo said:

Incurring the risk to spoiling the fun for you some things to consider, from the top of my mind:
 

  Hide contents

 

-aerodynamic nosecones instead of tail cones (less weight, more drag. Seems to be a net gain to me. Stability may be a concern.)

-alternatively put everything inside a 2,5m fairing for the ascent. For re-entry drag is a good thing.

-possible replacing some of the command pods with crew cabins for weight reduction. Keep a pointed part on top of each stack.

-for the launch vehicle itself (stage 5 and below) I'd consider a main stack with Skipper engine and a pair of side-attached Thumpers, looking for a launchpad TWR over 1,7. (I design my launch vehicles to have a so easy that my cat can do it launch procedure. Lower TWR make it trickier)

-The LFO tank have the highest priority, decouplers with fuel crossfeed enabled . Just enough Liquid fuel/oxidizer on top of SRB's to maintain the main engine while the SRBs burn.

 

BTW, I prefer this upper stage instead of the 2,5 variant.

I will take them in account. I am already working on this project.

 

[felcas]

1 hour ago, Spricigo said:

Incurring the risk to spoiling the fun for you some things to consider, from the top of my mind:
 

  Hide contents

-aerodynamic nosecones instead of tail cones (less weight, more drag. Seems to be a net gain to me. Stability may be a concern.)

BTW, I prefer this upper stage instead of the 2,5 variant.

I used the tail cones because they just look awesome and slick and that also contribute as why I agree with you I prefer it instead of the 2.5 variant. The 2.5 was an exercice of new technology and more knowledge.