| Download | - View final version: Relationship between the aiming plane and the seating plane of 5 ¾ inch diameter SAE headlamps (part 2) (PDF, 1.7 MiB)
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| DOI | Resolve DOI: https://doi.org/10.4224/40003124 |
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| Author | Search for: Mackenzie, Colin1 |
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| Affiliation | - National Research Council of Canada, National Aeronautical Establishment
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| Format | Text, Technical Report |
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| Physical description | 23 p. |
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| Abstract | It has been suggested that many people when changing headlamps assume that because the original headlamp was properly aimed, the replacement will also be aimed properly if the headlamp aiming adjustments were not altered during replacement. For SAE headlamps, the photometric aim relative to the aiming plane is controlled during manufacture. For installation in a vehicle the aiming plane is then used as a reference by mechanical aiming devices. When changing headlamps the only physical reference points are the seating pads which form the seating plane, so the relationship between the seating plane and the aiming plane of the original and replacementlamps determines the change in aim of the replacement lamp.
This note describes and tabulates measurements done on twenty-five headlamps to determine the relationship between the seating and aiming planes. The results obtained from similar measurements in LTR-ST.695 (reference 5) are included in figures 6, 7 and 9. |
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| Publication date | 1975-01-20 |
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| Publisher | National Research Council of Canada. National Aeronautical Establishment |
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| Series | |
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| Language | English |
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| Peer reviewed | No |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 52734fc2-57f2-4337-8e02-eb103af1810b |
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| Record created | 2023-08-01 |
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| Record modified | 2023-08-01 |
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