kvs wrote:Morpheus Eberhardt wrote:kvs wrote:Morpheus Eberhardt wrote:
I have no sources and I doubt they exist aside from blogger speculation.
It looks to me like all the engines are used to control any roll. One of the pluses of having thrust vectoring ability (albeit limited).
Before the separation of the strap-ons (blocks A, B, V, G), the strap-ons perform the roll control. The question relates to the phase after the separation of strap-ons.
We do not see if the inner section deploys winglets so I would not rule that out.
Thanks for your reply.
Purely aerodynamic (?) or partially aerodynamic roll control can be feasible for the first stage of Angara-1.2, for example. However, the Angara-5's core is mostly a 2nd stage rocket block. I doubt that aerodynamic control would be useful regarding the Angara-5's core's flight profile.
Additionally, Angara-1.2, etc. probably only use supplemental aerodynamic roll control during the early stages of their flight when, due to the larger moment of inertia of the launchers around the roll axis at the early stages of their flight, the Angara-1.2 type optimally small thrust-based roll control system is not sufficient. Under this scenario, the question still is where the roll control thrusters on Angara-1.2, etc. are.
Last edited by Morpheus Eberhardt on Fri Jan 02, 2015 1:03 am; edited 3 times in total