INTA-300

{{short description|Suborbital two-stage launch vehicle of the Spanish INTA}}

{{Infobox rocket

| image = Inta300 diagrama.svg

| caption = INTA-300 diagram

| country-origin = Spain

| height = {{cvt|7.27|m|ft}}

| diameter = {{cvt|0.26|m|ft}}

| stages = 2

| capacities = {{Infobox rocket/Payload

| location = Suborbital

| altitude = {{cvt|50|km|mi}}

| mass = {{cvt|50|kg|lb}}

}}

| status = Retired

| sites = El Arenosillo

| launches = 6

| first = October 9th, 1974

| last = February 18th, 1981

| stagedata = {{Infobox rocket/stage

|type = stage

|diff =

|stageno = First

|name = Aneto

|length =

|diameter =

|empty =

|gross = {{convert|503|kg|lb}}

|engines =

|thrust =

|SI =

|burntime = 3{{nbsp}}s

|fuel =

}}

{{Infobox rocket/stage

|type = stage

|diff =

|stageno = Second

|name = Teide

|length =

|diameter =

|empty =

|gross =

|engines =

|thrust = {{cvt|16.3|kN|lbf}}

|SI =

|burntime = 16{{nbsp}}s

|fuel =

}}

}}

The INTA-300, also known as the "Flamenco", was a two-stage Spanish sounding rocket. It consisted of a launch stage from the type Heron and an upper stage of the type Snipe.

Based on a Bristol Aerojet's INTA-255 rocket, the INTA-300 is capable of reaching altitudes of 300 km (186 mi) alone and to 50 km (31 mi) with its maximum payload weight,{{Cite journal|date=July 1994|title=IAA scientific programme committee|journal=Acta Astronautica|volume=33|pages=ix|doi=10.1016/0094-5765(94)90099-x|bibcode=1994AcAau..33D...9. |issn=0094-5765}} having a thrust of 138.00 kN.

The intent of the INTA-300 was to be able to lift a payload of 50 kg to 300 km. With the help of the Bristol Aerojet, the Instituto Nacional de Técnica Aeroespacial was able to make a powerful enough prototype in 1981, after three unsuccessful launches. By the time of the fourth model's construction, funding had been cut.{{Cite web|title=INTA-300|url=http://www.astronautix.com/i/inta-300.html|archive-url=https://web.archive.org/web/20161227205121/http://astronautix.com/i/inta-300.html|url-status=dead|archive-date=December 27, 2016|website=www.astronautix.com|access-date=2020-05-23}}

When funds became available again in the 1990s, the fourth model of the INTA-300 was modified into a more efficient model dubbed the INTA-300B, capable of carrying heavier payloads and reaching higher altitude.{{Cite web |date=2016-12-27 |title=INTA-300B |url=http://astronautix.com/i/inta-300b.html |access-date=2023-10-08 |archive-url=https://web.archive.org/web/20161227225714/http://astronautix.com/i/inta-300b.html |archive-date=2016-12-27 }}