The amount of torque available by acting on the engine exhaust is going to be too small for vehicles like Carmack's.
The exhaust diameter is just too small.
Eh? It seems to work just fine. We are making great progress on the big jet vane setup, so we should be flying that next Saturday for another data point.
It doesn't take all that much thrust for roll control.
Probably makes sense to have a small tangential pair of roll thrusters. In the case of H2O2, small on-off thrusters.
If we had 90% H2O2, we would have been flying the big vehicle nine months ago. Our mixed-monoprop isn't suitable for pulsed thruster operation.
John Carmack
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