Specifics of measuring trajectory velocity of small aircraft by means of optical chronographs

Authors: Bogomolova P.D.
Published in issue: #8(13)/2017
DOI: 10.18698/2541-8009-2017-8-149
Category: Aviation and Rocket-Space Engineering | Chapter: Aircraft Dynamics, Ballistics, Motion Control
Keywords: optical chronograph, velocity measurement, drag coefficient, trajectory velocity, ballistic track
Published: 12.07.2017

The study focuses on optical chronograph design. We pinpoint the specifics of their functioning under various environmental conditions. We used chronographs to measure trajectory velocity of small aircraft, provided that the trajectory segment under consideration is horizontal or close to horizontal. We employed chronographs to work with small aircraft samples on a ballistic track. We calibrated the chronographs over the course of conducting several experiments. We computed the drag coefficient of the aircraft sample.

References

[1] Kol’tsov Yu.F. Kratkie svedeniya o metodakh izmereniya skorosti dvizheniya snaryadov i pul’ na traektorii [Summary on measurement techniques for bullet speed and movement on its trajectory]. Moscow, 1959. 25 p.

[2] Emel’yanova N.S. Software for experimental research on ballistic track. Molodezhnyy nauchno-tekhnicheskiy vestnik, 2014, no. 6. Available at: http://sntbul.bmstu.ru/doc/723443.html.

[3] Ilyukhin S.N. Drag coefficient evaluation technique in process of experimental research on a ballistic track. Molodezhnyy nauchno-tekhnicheskiy vestnik, 2014, no.1. Available at: http://sntbul.bmstu.ru/doc/704437.html.

[4] Ilyukhin S.N., Moskalenko V.O., Khlupnov A.I. Experimentally studied influence of the bullet head shape on dispersion characteristics at subsonic airspeeds, Aerokosmicheskiy nauchnyy zhurnal [Aerospace scientific journal], 2015, no. 5, pp. 38–48. Available at: http://aerospjournal.ru/doc/819074.html.

[5] Zlatin N.A., Krasil’shchikov A.P., Mishin G.I., Popov N.N. Ballisticheskie ustanovki i ikh primenenie v eksperimental’nykh issledovaniyakh [Ballistic installation and its use in experimental research]. Moscow, Nauka publ., 1974. 344 p.

[6] Kol’tsov Yu.F. Opredelenie koeffitsienta lobovogo soprotivleniya strel’boy na ballisticheskoy trasse [Drag coefficient evaluation by means of shooting at the ballistic track]. Moscow, Bauman Press, 1964. 28 p.

[7] Dmitrievskiy A.A., Lysenko L.N. Vneshnyaya ballistika [Exterior ballistic]. Moscow, Mashinostroenie publ., 2005. 608 p.