אינדקס
Indian Rocket Launch Breaks Record by Orbiting 104 Satellites
The Indian Space Research Organisation has successfully launched it's Polar Satellite Launch Vehicle (PSLV) early morning February 15th 2017 at [You must be registered and logged in to see this link.] UTC. The rocket carried as the primary payload the Cartosat-2D reconnaissance satellite for the Indian Government. ISRO also launched the ISRO Nanosatellite 1A and 1B payloads as well as a further 101 cubesats giving a total of 104 satellites to be launched on one rocket at once.
על פי השמועות טיל השיגור של הודו זה טכנולוגיה ישראלית שההודים משתמשים בה
הנונו לווינים שבלווין הזה גם הם טכנולוגיה ישראלית
אבל ההודים והישראלים שתופים במיזמים אלה וכן בפיוח טילים בליסטים
הודו רוכשת בכל שנה מיליארדים של נשק מישראל
הודו רכשה את כל הטילים של ישראל
הניסיון של הודו לפתח טילים לבדה נכשל ולכן היא התחילה לשתף פעולה עם ישראל
the payload was 3,300 pounds. less then 2 metric tons so it was a very light payload. the reason it took off the pad so fast compared to Saturn V is because PSLV uses solid rocket fuel. liquid fuel rockets climb very slow off the pad but build up speed fast. Solid boosters jump right off the pad but burn up the fuel very fast. liquid engines have a higher specific impulses so you will get more Delta V from liquid vs solids. the PSLV uses solid boosters and liquid engines and hypergolic fuel and cryogenic fuel for the upper stage. not sure why ISRO went with that combination of different fuels, but PSLV is reliable.
it has to obtain orbital velocity of 28,000 kph
light weight payload and PSLV uses solid fuel for the core of the first stage. SRB it solid rocket booster is very fast of the launch pad.. liquid engines climb slow at first, almost like slow motion but in less than 2 minutes it's already supersonic! the Delta V for LEO is about 8 kilo per second or 28,000 kph. 5 miles a second is pretty fas
The option for solid as first stage is because (most probably) during initial ascent not much of throttling is required for a unmanned craft and solid motor is less complex then liquid fuel one and consumes far less weigh
104 satellites sounds like a lot. But when 101 of those are tiny little 1U or 3U cube sats, then you realise that its cool and all, but not as impressive or amazing as ISRO and fans are making it out to be. Yes its a new record, but some ISRO fans I have talked to seem to think this feat makes ISRO superior to NASA. Long long way to go for ISRO to match the awesome work NASA is doing. Anyways, congrats to ISRO and the successful launch of the venerable PSLV.
