prasannasimha wrote:Indranil wrote:The Indian system uses wireless communication to start with.
I was reading up on pad abort testing and the first pad abort test of tge Apollo crew capsule was placed on a booster. This had 3 wires running and if rwo of 3 wires broke it would initiate the abort automatically. The little joe booster went inro an uncontrollable spin due to some defect and started breaking up and the abort command was initiated automatically. This was a succesful abort test with a an unintentional faikure of the booster !
This highlights the importance of redundancy in these systems.
If you see the crew capsule I think those linear ridges hold interstage connections in addition to wireless coms. ( you can see thise very well in the PSLV and Agni missiles too ).
I am sure that they would have multiple redundancies. But Dr. Sivan marked out wireless trigger mechanism as one of the 6 things tested in this round.
prasannasimha wrote:Looks like once they have all the respective units in place tge formal sanction form human space flight will be given.
Taking crew capsule and service module etc we will need at least 15 Tons to LEO.
ULV in the 2*S200 + SC160 + CE25 config would be able to lift 15 ton to LEO.
The lingering question in my mind is that the SC160 cannot be used as a standalone first stage (stick model). In fact, we won't get to a stick model before we get to TSTO which has a 5 Ton to GTO capacity! What about the lower end? I was hoping that ISRO would be design a SC110 stage powered by SCE200 which can be used as the first stage and boosters.
1. SC110 + CE25 would be the stick model which would be similar in capability to PSLV-CA equivalent: 1 ton to GTO.
2. 2*SC110 (boosters) + SC110 (first stage) + CE25 would be the GSLV Mk2 equivalent: 2.5 tons to GTO
4. 4*SC110 (boosters) + SC110 (first stage) + CE25 would be the GSLV Mk3 equivalent: 4.5 tons to GTO or very similar to TSTO with SC500 + CE25. If the later is ready, then it becomes the stick model for beyond 5 tons to GTO payload.
But this is much lower risk model, and a good fall back option. No clustering of SCE200 involved. SC160 will have a 5 mtr, SC400 closer to 7 mtr, all of which are completely knew developments for India. The SC110 would be similar in structure to the current L110 stage.