403
edits
PHI - Position and Homing Indicator: Difference between revisions
PHI - Position and Homing Indicator (view source)
Revision as of 20:52, 23 November 2020
, 23 November 2020no edit summary
No edit summary |
No edit summary |
||
| Line 7: | Line 7: | ||
With this speed difference technique, it was possible to establish the speed with high accuracy. The accuracy, however, decreased in the case of mountainous terrain or in turns. Therefore it was necessary to have two groups of beams to average the values and thus obtain a less error-prone result. | With this speed difference technique, it was possible to establish the speed with high accuracy. The accuracy, however, decreased in the case of mountainous terrain or in turns. Therefore it was necessary to have two groups of beams to average the values and thus obtain a less error-prone result. | ||
[[File:AD0091920 PHI MK2 - Principle of operation.jpeg|thumb|PHI mod MK2 - Principle of operation from confidential doc AD091920<ref>The canadian position and homing indicator mk.2 doc: AD091920. CLASSIFICATION CHANGES. TO: unclassified. FROM: confidential. LIMITATION CHANGES. TO: Approved for public release, distribution unlimited. | [[File:AD0091920 PHI MK2 - Principle of operation.jpeg|thumb|PHI mod MK2 - Principle of operation from confidential doc AD091920<ref>The canadian position and homing indicator mk.2 doc:[https://apps.dtic.mil/dtic/tr/fulltext/u2/091920.pdf|AD091920. CLASSIFICATION CHANGES. TO: unclassified. FROM: confidential. LIMITATION CHANGES. TO: Approved for public release, distribution unlimited. | ||
di RL JEFFERIES · 1955 | di RL JEFFERIES · 1955]</ref> (1955)]] | ||
It is important to remember that the technique was possible with the constant improvement of the quality of radars and their simultaneous miniaturization due to the rapid development of this device during and after the Second World War. The PHI model used in the FIAT G91 and in the F104s from the A-B to G series and in various civil aircraft including the DC8, was mechanical (ball integrator) and with tube electronics, no transistors were still used. | It is important to remember that the technique was possible with the constant improvement of the quality of radars and their simultaneous miniaturization due to the rapid development of this device during and after the Second World War. The PHI model used in the FIAT G91 and in the F104s from the A-B to G series and in various civil aircraft including the DC8, was mechanical (ball integrator) and with tube electronics, no transistors were still used. | ||