Author Topic: SSLV Discussion Thread  (Read 50939 times)

Offline sanman

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Re: SSLV Discussion Thread
« Reply #80 on: 03/21/2021 04:57 pm »
Sounds like it was a static fire test in which the malfunction occurred.

Offline K210

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Re: SSLV Discussion Thread
« Reply #81 on: 03/23/2021 02:52 pm »
S85 (First stage motor) static test failed due to design issues

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The static test of first stage solid motor (SS1) of ISRO's Small Satellite Launch Vehicle (SSLV) -- a new-generation compact rocket -- was not successful, according to sources in ISRO. "Oscillation was noticed after 60 seconds into the test and nozzle was blown out near the bucket flange where it's attached with the motor at around 95 seconds", sources in the Bengaluru-headquartered space agency said.

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It was supposed to be tested for a total duration of about 110 seconds, officials said.

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New motor has to be static tested on the ground to prove its performance. If it is successful, one more of the same configuration is tested again for acceptance.

If both are successful, no more ground test is required and third motor of the same configuration will be accepted for flight", an ISRO official said.

On payload capacity of SSLV

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It is a three-stage all solid vehicle with a capability to launch up to 500 kg satellite mass into 500 km low earth orbit (LEO) and 300 kg to Sun Synchronous Orbit (SSO).

Source: https://economictimes.indiatimes.com/news/science/static-test-of-first-stage-solid-motor-of-indias-mini-rocket-sslv-unsuccessful/articleshow/81653164.cms

Offline TheVarun

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Re: SSLV Discussion Thread
« Reply #82 on: 03/23/2021 08:19 pm »
^
Also importantly, the article speaks of a six month time period to test the new motor(s). Which means the SSLV-D1 launch will be delayed well beyond September of this year.  I may have spotted some sloppy editing here. In one paragraph, the Economic Times report says 'in all probability' the SSLV schedule will have to be revised. Meaning there is still a glimmer of hope that they will stick to the April launch date. But later in the article, the ET specifically asks how long it will take to test the static motors, and an ISRO official replies 'about 6 months'.   So there is no question whatsoever of a delay. It will be delayed.
« Last Edit: 03/23/2021 08:26 pm by TheVarun »

Offline sanman

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Re: SSLV Discussion Thread
« Reply #83 on: 03/24/2021 10:19 pm »
Apparently, a local person managed to get some video of the SSLV static fire test on their phone:


Tags: SSLV ISRO 
 

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