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karthikeyan's user avatar
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karthikeyan
  • Member for 10 years, 9 months
  • Last seen more than a month ago
  • Chennai, India
35 votes
3 answers
6k views

Why was it necessary to program InSight with an ability to land in dust storms?

31 votes
1 answer
5k views

What are these membranes at the aft end of the Shuttle that get torn off during lift off?

21 votes
2 answers
3k views

How is thrust transmitted from strap on boosters to the central core?

20 votes
2 answers
4k views

Where does the thrust act in a rocket engine and how is it transferred to rocket structure?

15 votes
1 answer
2k views

What is the advantage of using Helium over Nitrogen when used for pressurising LOx?

14 votes
4 answers
7k views

How can electronics on board JWST survive the low operating temperature while it's difficult to survive lunar nights?

13 votes
1 answer
1k views

Why does the 2nd stage of Falcon 9 need compressed He tanks?

12 votes
1 answer
160 views

Why did GRACE mission have launch window?

11 votes
2 answers
2k views

Why latest Landsat satellites have solar panel on only one side?

9 votes
1 answer
3k views

Why is a purging process necessary for static firing test of liquid rocket engines?

8 votes
1 answer
715 views

Why is Nodal precession affected by the rotational period of the planet?

7 votes
1 answer
129 views

What parameters of an rocket engine determines whether it is fit for any more static hot fire test?

7 votes
3 answers
5k views

Why is Adiabatic wall temperature taken as the driving temperature in rocket engines?

7 votes
1 answer
433 views

How accurate is the following claim about NASA, from the movie Martian?

6 votes
1 answer
368 views

Would a Martian landing and take off require a flame trench/deflector?

6 votes
1 answer
821 views

Why are 22N and 440N liquid engines quite common?

6 votes
1 answer
701 views

Which is the preferred mode of liquid rocket engine cutoff - fuel lean cutoff or fuel rich cutoff?

6 votes
3 answers
922 views

Is it appropriate to use the term "geology" for Martian studies?

6 votes
1 answer
2k views

What was the colour of the shoes used by the Apollo astronauts in moon landing?

5 votes
1 answer
109 views

Is the payload HP3, onboard the InSight a single use instrument?

5 votes
0 answers
215 views

What is the droplet size that is desirable for pintle injectors?

5 votes
0 answers
405 views

Why is heated Helium used for tank pressurisation in Falcon 1?

5 votes
1 answer
188 views

Why NASA hosts many of their reports public, while ESA/JAXA/ Roscomos doesn't?

4 votes
0 answers
92 views

Why doesn't a regeneratively cooled engine crack due to differential expansion induced by thermal gradients?

4 votes
1 answer
2k views

Which of the orientation is preferred for static fire testing of a liquid rocket engine - vertical or horizontal?

4 votes
1 answer
545 views

Does LOx stay as liquid when entering combustion chamber?

4 votes
2 answers
122 views

How close will the cubesats be when numerous of them are launched simultaneously?

4 votes
1 answer
298 views

How would Ingenuity handle Martian Storm and dust devils?

3 votes
1 answer
973 views

Is it possible to capture geostationary satellites with DSLR?

3 votes
1 answer
337 views

Why does the exhaust plume apprear to be throbbing?