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ACTUAL PROBLEMS OF AVIATION AND AEROSPACE SYSTEMS
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Historical aspects of creation of ballistic support

of the first carrier rockets and space vehicles launches

designed by S.P.Korolev

L.N.Lysenko

N.E.Bauman MSTU

2-nd Baumanskaya St., 5, Moscow, 105005, Russia

High rates of space-rocket engineering development and appearance of new problems of national defense potential increase and outer space exploration have demanded creation of perfect and highly effective ballistic support (BS) of carrier rockets (CR) and space vehicles (SV) launches.

The solution of this complicated scientific and technical problem has been carried out in our country during the shortest time, and with the rates essentially exceeding the development of corresponding engineering tools.

However, the considered aspect, as any scientific and technical problem, has its "beginnings", sources and background which are closely connected with the history of rocket and space engineering creation in the USSR.

Though analysis of historical aspects of solution of any scientific and technical problem represents a part of a strict science "History of engineering", for the most part it is associated with subjectivity of its author. This circumstance is quite obvious if we take into consideration that the initial sources of information are rather incomplete and often so far inaccessible archival materials and memoirs of witnesses. The latter, even at aspiration to absolute reliability of an estimation of what they went through, cannot be fully objective, by definition. The events reproduced by them, are always transmitted through their own perception, and by virtue of passing years, are always represented in some other light, than in what they had occurred.

If we speak about history of creation and practical application of ballistic support of rocket launches designed by S.P.Korolev, since R-1 and up to ballistic support of the legendary "seven" launch which carried the first spaceship with Y.A.Gagarin aboard into space, then certainly, the multivolume set of memoirs [1] of an outstanding pioneer of rocket engineering in general and astronautics in particular the academician of the Russian Academy of Sciences B.E.Chertok should be considered the most exhaustive and authentic.

It should be noted, however, that the aspects of ballistic support of launching the first rockets, according to the known reasons, were not fully depicted in this fundamental work which includes the description of wide variety of historical events connected with rocket engineering creation.

In this sense it seems interesting to try to reconstruct them professionally, using the accessible archival and technical references and memoirs of other authors who took part in creation and practical application of ballistic support of launches of the first native missile complexes and SV rockets-carriers, from modern positions and the representations which have settled during almost a semi-centennial term.

Thus it is expedient to limit the discussed period of time to an interval of 1946-1963. The reasons of such a choice will become clear from the following discussion.

It is known [2] that the purpose of BS is arrangement, and in case of need, development of absent data and theoretical positions, representing the sources of initial ballistic information which is necessary and sufficient for the solution of the whole set of problems of managing the CR and SV movements.

Being focused on the operative solution of problems of concrete flight of concrete type of CR or SV, BS should reflect the features of given concrete type of an aircraft as an object of management, and also the features of a concrete flight regarding the decision of such problems as the control of an active site, division and falling of stages of CR, definition of parameters of trajectories and orbits, forecast of movement, definition of illumination and ranges of radio visibility, target designation for probes, "correction of passage" of orbits for overlapping the path on the certain coils with landing polygon, etc.

By the way we should note that "ballistic support", generally speaking, is not quite successful term. It appeared with distribution of concept "ballistic software of electronic digital computing machine" on direct process of the decision of ballistic problems. The substrate of BS is its software mathematical support (MS), and its operating tool is program-algorithmic support (PAS).

The main requirements for BS are defined by the type of current problems and reduced to maintenance of demanded accuracy and reliability of solution results, and also to exclusively high efficiency of their reception.

It is necessary to accept that both the roots of practical rocket production in the USSR and the first attempts of creating the BS of rockets launches are connected with development of experience of rocket engineering creation in fascist Germany.

As is generally known [1, 3, 4], from July till August, 1945 the group of the Soviet experts including S.P.Korolev, V.P.Glushko, V.P.Barmin, N.A.Pilyugin, V.P.Mishin, M.S.Pyazanskiy, V.S.Kuznetsov, A.M.Isaev, B.E.Chertok, G.A.Tyulin, M.K.Tikhonravov, etc. were directed to East Germany. This group numbered 284 specialists including the technical staff.

Under the direction of the experts detached to Germany, in the Soviet occupational zone there were created several organizations for restoration of the destroyed and lost scientific-technical and design documents, and for researching the rocket heritage of the Reich. Search and resto-ration of materials on ballistics and theory of rocket flight was entrusted to V.P.Mishin [1, 2].

To the middle of 1946s the problems which the detached Soviet experts had been faced with, were mainly solved. They returned home, taking with them ten ready for assembling sets of "V-2", restored on the basis of the engineering specifications which were detected by V.P.Mishin's group in military-technical archive in Prague (series "T") and ten assembled and certified rockets ready to flight tests (series "N").

Together with our experts a group of German missile specialists (altogether about 150 experts) was sent to the USSR. This group was headed by one of the closest Brown's employees in Peenemunde Helmut Grettrup. It included such well-known experts as professor Upfenbach, Dr. Hoch, Dr. Mangus, Dr. Wolf, Dr. Albring, etc.

Among listed, the name of Dr.V.Wolf, who was the main expert on ballistics in "Krupp", and headed the works on creation of ballistic support of "V-2", also attracts attention.

In May, 1946 the Soviet government passed the Resolution on creation of rocket production industry in the country, which played the defining role in development of missile weaponry of distant range. According to the Resolution, Head Ministries, special design bureaus (SDB), scientific research institutes (SRI), polygons, etc. were formed, both in system of the Ministry of Defense and in the industry. On the basis of the Resolution of the Central Committee of the CPSU and Council of Ministers of the USSR in Podlipki the head rocket Institute SRI-88 of the Ministry of Arms was created. It was headed by Major General of artillery L.R.Gonor, and its chief engineer was Y.A.Pobedonostsev. B.E.Chertok who headed simultaneously the department of control systems was his deputy. S.P.Korolev who headed the 3rd department of SDB of the institute was appointed the Main Designer of automatically operated ballistic missiles of distant range. He also headed the Council of design managers. Practically in all memoirs about S.P.Korolev his exclusive talent of the organizer and designer multiplied by intuition and ability to make predictions [1, 3] is mentioned. At the same time his scientific level is always estimated as rather moderate, that is evidently caused by absence of impressive works written by him and particularly practical orientation of his activity [5] fixed afterwards with a very honorable title, being nevertheless a label, "the founder of practical astronautics".

Together with this fact, careful analysis of S.P.Korolev's activity gives reasons to approve that this outstanding person possessed a huge scientific potential and aspiration not to solve the problems simply in the best way, but also to understand physical essence of studied problems thoroughly, and to find their scientific decision. Materials on the meetings of the Technical commission on rocket engineering [6] which took place in Berlin on 27-28th March, 1946, can prove it.

Generally speaking, S.P.Korolev, being sent to Germany in a rank of the lieutenant colonel, did not nominally hold leading position in the group of the Soviet experts. Initially he took up his rather modest post of the head of "Shot" group created for preparation of flight tests of trophy ballistic missiles "V-2". However, his immense authority earned as far back as working in Rocket Motion Research Group, and then in SRI of Rocket Motion, allowed him to take up a role of the informal leader very quickly and not just to report on the works "Preparation of  trial firing with "V-2" rockets" and "Restoration and development of the A-9 rocket project", but also acting in debates of the mentioned above meeting, to prove scientifically ten (!) possible methods of increasing the flight range of ballistic missiles of distant range.

The first launch of ballistic missile from the set of assembled at the development plant of SRI-88 from units and details of "V-2", taken out of Germany (series "Т"), took place on October, 18th, 1947 at 10.47 at Kapustin Jar polygon. The rocket covered 206.7 km and deviated from the considering point to the left by 30 km. The rocket airframe did not reach the surface and collapsed at dense atmosphere. The second rocket launch of the same series was executed on October, 20th. The rocket covered 231.4 km but deviated to the left by 180 km. Altogether eleven missiles were tested, five of them were assembled in Germany and the other six missiles at the plant of SRI-88. Let us note the important circumstance, that ballistics of "V-2" was reproduced in Germany by Russian theorists, who subsequently worked at the 3rd department of SDB, and then at Design Bureau-1, S.S.Lavrov and R.F.Appazov together with Dr. Wolf. Calculations of the "settings" using the restored tables of firing at trial launches were made by German experts.

Side deviations of falling points resulted from low accuracy of onboard gyroscopic devices and defects of used BS regarding inadequate definition of perturbing factors, mainly, thrust misalignment of propulsion unit.

Assembled completely of details and units of native production, BR R-1 passed the flight tests in 1948 (10 launches) and 1949 (12 launches). In 1951 it was added to national armory. Its range was 270 km. Soon the flight tests of R-2 and then R-5 began.

After becoming the Design manager of ballistic missiles of distant range, and then the head of Design Bureau-1, S.P.Korolev was obliged to solve a great amount of organizational-economic, building, personnel and other problems practically excluding an opportunity of carrying out his own scientific developments.

Moreover, possessing state thinking, he perfectly understood, that time of ingenious single scientists had passed long ago. It was necessary to create scientific collectives capable of solving the most complicated scientific problems, set by the Design manager as the leader who had overrun his nearest colleagues by a level of knowledge and ability to realize purposes of scientific-technical prediction.

This circumstance can explain involving in 1950-52 a wide group of experts in researches concerning creation of various types of ballistic missiles of distant range, including "compound" missiles based on rocket packages of average range (themes N-1 : N-3), and then in researches concerning creation of missiles of intercontinental range or intercontinental ballistic missiles (themes T-1 and T-2). The latter began in accordance with the Decision of Council of Ministers of the USSR form February, 13th, 1953.

Already during this work S.P.Korolev, as its supervisor, aspired to use creative potential of members of Academy of Sciences, missile branch of Academy of artillery sciences (AAS) (being himself a correspondent member since 1947), experts of CAHI, CIAM, military and academic institutes and high schools and, naturally, first of all the employees of close and well-known for him SRI-88.

Naturally, BS of added to armory missiles was developed, in particular during the mentioned research work, by Russian engineers, though taking into consideration some experience of German experts.

It is possible to judge about the level of BS of that period of time uppermost by published, first in a confidential variant, and then in publishing house "Nauka" (1966) fundamental work of employees of Design Bureau-1 S.S.Lavrov, R.F.Appazov and V.P.Mishin "Ballistics of guided missiles of distant range" [7].

The first native intercontinental ballistic missile R-7 (8k71) was tested in 1957, and added to armory in R-7A modification in 1960. R-7 missile is known as the "legendary seven", which carried out the space launch of the first artificial satellite, and then the first man, our compatriot Yu.A.Gagarin.

While creation of BS of the first ballistic missiles launches, as it was already mentioned, was based on experience of German missile specialists, creation of BS of space flights was practically carried out by native experts from "fresh start".

A significant role in solving this problem at the initial stage of outer space development was played by a collective of the 4-th missile SRI of Ministry of Defense (SRI-4 MD) organized in 1946. This institute substantially executed functions of an original incubator of the staff in the field of space ballistics. The first steps connected with the origin of space ballistics in SRI-4 at that time were defined by activity of the head of ballistics and control of liquid-fuel ballistic missiles branch Mikhail Klavdievich Tikhonravov. Under his management the group of enthusiasts of outer space exploration was formed. At the beginning of 50--s the experts of this group, only by their initiative, executed a number of investigations arranged as reports on scientific research and directed to Design Bureau-1 to S.P.Korolev, in which the problems of ballistics of CR based on "the batch scheme", which was capable to carry payload into satellite orbit, were considered. Acquaintance with these materials gave S.P.Korolev reasons to order "Researches concerning creation of the artificial satellite of the Earth" which officially began in 1954 at SRI-4 MD. In this research for the first time the substantiation was given concerning an opportunity of creation of IBM BS with range of 8...10 thousand km with its simultaneous application as BS of artificial satellite CR. It took, however, about 10 years before semi-official activity of enthusiasts of the military SRI was converted into the strict frames of administrative structure. Indeed, only in May 1956 in SRI-4 the first specialized laboratory of space ballistics was created and headed by P.E.Eljasberg.

The artilleryman and participant of the Great Patriotic War, decorated with battle orders and medals, who subsequently became a skilled expert in ballistics, Pavel Efimovich was quickly accepted as one of principal space engineers of the country. He not only rendered a defining influence on development of the discussed scientific direction, but also brought up a significant group of the first class experts not only in SRI-4 where he had worked for many years, but also in the Lomonosov's MSU where in the beginning of 60s he read a corresponding course at an engineering stream of mechanic-mathematical faculty.

In absence of high-speed electronic computer facilities (a computer center based on EDCM M-20 was launched in SRI-4 MD only in April, 1960), the developed BS was meant for allowing manual simplified operating techniques (in the last resort, with application of computing automatic devices of mechanical type). This is the reason for the widest application of graph-analytic methods of calculation implemented by means of special pads and charts at that time. Their creation demanded talent, truly Russian sharpness, and often even an exclusive intuition, because it was required to combine, generally speaking, incompatible requirements of simplicity of usage and acceptable accuracy of calculations. At such level of BS development all main ballistic problems for the first artificial satellite were solved.

A monograph written by P.E.Eljasberg "Introduction in the theory of flight of an artificial satellite" [8], published by "Nauka" in 1965 after a long term of  tryout of the course, read by him in MSU, was a great generalization of this stage of BS of an artificial satellite creation.

Alongside with M.K.Tikhonravov and P.E.Eljasberg, we also should mention M.D.Kislik, A.V.Brykov, I.M.Jatsunsky, I.K.Bazhenov, V.D.Jastrebov, G.R.Uspensky, O.V.Gurk, A.V.Tsepelev as the developers of the BS of the first artificial satellites launches.

With creation of the first examples of electronic computers in the USSR new facilities of technical realization of BS of CR launches and flights of artificial satellites appeared.

The first computer centers (CC) based on EDCM "STRELA-1" with performance of approximately 2...3 thousand operations per second were created in the Ministry of Defense (CC-1), Academy of Sciences (CC-2 and CC-3) and Lomonosov's MSU (CC-4).

As it was already mentioned, in April 1960 a new CC-5 at SRI-4 MD was launched, which was equipped with the most effective for that time computer facilities: two three-address EDCM M-20 with performance of approximately 20 thousand operations per second.

As a result there appeared an opportunity of creation of program complexes for full automation of calculations at trial launches of ballistic rockets of distant range and maintenance of flights of both pilot and pilotless aircrafts, artificial satellites put into orbits, and also function formalization of coordination of the works assigned to coordinating computer centers (CCC). At various times Y.A.Mozzhorin, G.A.Tyulin, G.S.Narimanov, A.A.Bolshoy headed the first CCC based on SRI-4 MD.

Expansion of computing facilities led to natural aspiration to complication of used mathematical models and their high adequacy to real physical processes. It demanded specification of gravitational field of the Earth (GFE) and its atmosphere, influence of Sun activity on variations of atmospheric density, parameters of magnetic field of the Earth, radiation fields (belts), etc. Many organizations were involved in the corresponding works and first of all the systems of Academy of Sciences.

The results of initial work on creation of BS of space means were highly estimated by the Native land. For services in maintenance of the first artificial satellite launch P.A.Agadzhanov, I.K.Bazhinov, A.V.Brykov, M.D.Kislik, G.I.Levin, Y.A.Mozzhorin, G.S.Narimanov, A.I.Sokolov, M.K.Tikhonravov, G.A.Tyulin, P.E.Eljasberg and I.M.Jatsunsky were honoured with the Lenin award.

Preparation for the first piloted flight demanded realization of some additional measures on increase of reliability of both BS itself, and ballistic calculations carried out on its basis.

BS technology was being continuously improved. Its tryout was preliminarily carried out during five pilotless launches of the first "Vostok" spaceships. The fourth and fifth launches were carried out strictly under the program accepted for the piloted flight [9].

The choice of orbit parameters was uniquely determined from those reasons, that life-support of the cosmonaut on "Vostok" spaceship was intended for 10 days. Therefore according to reliability maintenance, the orbit was selected so that time of ballistic existence of the space vehicle in the worst case (the least possible real atmospheric density during the flight) did not exceed 8 days.

Alongside with the requirement on terms of ballistic existence of the spaceship, the problem of the guaranteed landing at the expense of only aerodynamic braking in case of retropack failure on safe territory for the cosmonaut was set.

Descent control in an off-optimum situation caused by retropack failure assumed manual reorientation of the module for change of the effective area of its cross section, normal to incident flow of the rarefied atmosphere. The schedule of swings had to provide an aerocapture of the spaceship on the orbit passing above the territory of the USSR. The basic problems that appeared during the development of the BS of the first piloted flight were reduced, mainly, to the following:

-        uncertainty of knowledge of atmospheric density parameters during the real flight;

-        impossibility of exact practical realization of a real orbit in relation to the chosen nominal one by virtue of rather significant mistakes of ascent;

-        discrepancy of knowledge of terrestrial gravitational field; therefore, errors of radio system binding were defined for the European part of the USSR by tens of meters, and for remote from the European part centers - by hundreds of meters;

-        essential errors of measurement of orbit parameters by used probing technologies;

-        low performance, small memory capacity and low reliability of computer facilities.

Naturally, all possible steps for reducing negative consequences of the specified factors were undertaken [9]. Along with the head role of CC SRI-4 MD, all existing at that period CC were involved as duplicating ones.

During launch preparation all programs for solving problems of preliminary processing of trajectory measurements, definition of orbit parameters by trajectory measurements, forecast of motion parameters, forecast for multidaily intervals and calculation of lifetime, calculation of data on descent from an orbit in a regular mode, calculation of control parameters of descent from an orbit in case of retropack failure, calculation of illumination, visibility ranges and target designation for measuring centers, etc. were worked through and tested.

Interaction with measuring centers (MC) was fulfilled. Principles of duplication of the most responsible calculations in CC SRI-4 MD and verifications of the most significant results with other CC were specified. The program of angular motion control in case of an off-optimum situation caused by retropack failure was developed for a nominal orbit on all admissible interval of flight. It was delivered to Y.A.Gagarin before the launch.

And though it was clear, that for such situation calculation of concrete settings should be made directly by results of measurements of orbit parameters, the developed technique was perceived by its authors, as capable to render, first of all, positive effect on a cosmonaut [9].

We know, however, that the reality exceeded all predicted negative conditions.

Because of errors in action of the CR control system when the functional reached the demanded value the propulsion of the second stage engine was not terminated, therefore the speed of the spaceship at the point of separation was by 23 m/s up on the nominal speed, and the height of apogee exceeded the nominal one by more than 80 km. The measurements of orbit parameters were received from only two measuring centers. From the two other centers no measurements were gained, or they had such a poor quality that could not be subjected to the subsequent processing. Nevertheless, even in these extreme conditions, the purpose of flight was attained.

The modifications and practical application of BS of subsequent flights of "Vostok" spaceships were also accompanied by serious complexities. During G. S. Titov's flight there was a failure at binding the measurements to universal time that led to a very complicated situation. The formation flyings of A.G.Nikolaev and P.R.Popovich, and then V.F.Bykovsky and V.V.Tereshkova were also not trouble-free. However, the high level of BS tryout, selflessness of the task groups, who provided these flights, allowed successful solving of the problems.

The first (initial) step of development of space flights BS came to an end with the flights of "Vostok" spaceships. As a result of carried out works on ballistic support of the first artificial satellites and "Vostok" spaceship launches and flights an invaluable experience of their realization was gathered up and the information, allowing to guarantee the further progress in practical astronautics was received.

The next years gave the applied space ballistics the further development. The circle of the organizations taking part in solving the discussed problems essentially extended. The role of the Central Research Institute for Machine Building began to increase, and soon it became the head of the forming group of the ballistics experts in Russia.

As for the "beginnings" it is unconditional, as it follows from the stated, that with participation of many experts from different organizations, the defining role in solving the problems of ballistic support of CR launches and spaceships flights at this stage was played by the experts of SRI-4 MD and the experts of corresponding departments of Design Bureau-1 who took an active and interested part in coordination and practical application of the offered decisions.

 

Lev Nikolayevich Lysenko, graduated from N.E.Bauman MHTS. Since 1987 he is a Head of Ballistics and aerodynamics department of N.E.Bauman MSTU. Dr. Sci. Tech., professor, the Honoured Science Worker of the Russian Federation, the Honoured Inventor of RSFSR, the laureate of the President of the Russian Federation Award. The author of more than 300 published works, including 16 monographs, textbooks and manuals, a number of which reissued in foreign countries. The author and the co-author of more than 100 copyright certificates and patents for inventions. He is a Full member of the Russian academy of Rocket and artillery sciences (RARAS) and Tsiolkovsky's Russian academy of astronautics. The author is a member of the presidium and the head of branch "Ballistics and flight control" of RARAS, the vice-president of Advisory council of Supreme Certifying Commission of the Russian Federation. Areas of scientific interest: ballistics and motion control of rockets and space vehicles.



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