Anti-aircraft warfare
In 1925 the British adopted a new instrument developed by Vickers. It was a mechanical analogue computer Predictor AA No 1. Given the target height its operators tracked the target and the predictor produced bearing, quadrant elevation and fuse setting. These were passed electrically to the guns where they were displayed on repeater dials to the layers who 'matched pointers' (target data and the gun's actual data) to lay the guns. This system of repeater electrical dials built on the arrangements introduced by British coast artillery in the 1880s, and coast artillery was the background of many AA officers. Similar systems were adopted in other countries and for example the later Sperry device, designated M3A3 in the US was also used by Britain as the Predictor AA No 2. Height finders were also increasing in size, in Britain, the World War I Barr & Stroud UB 2 (7 feet optical base) was replaced by the UB 7 (9 feet optical base) and the UB 10 (18 feet optical base, only used on static AA sites). Goertz in Germany and Levallois in France produced 5 metre instruments. However, in most countries the main effort in HAA guns until the mid-1930s was improving existing ones, although various new designs were on drawing boards.

Q: What did the British designate the Sperry device as?
Predictor AA No 2
Luftvärnskrigföring År 1925 antog britterna ett nytt instrument utvecklat av Vickers. Det var en mekanisk analog dator Predictor AA No 1. Med tanke på målhöjden spårade dess operatörer målet och prognosatorn producerade lager, kvadranthöjd och säkringsinställning. Dessa fördes elektriskt till kanonerna där de visades på repeater-rattar till lagren som 'matchade pekare' (måldata och pistolens faktiska data) för att lägga vapnen. Detta system av repeterelektriska urtavlor byggde på de arrangemang som det brittiska kustartilleriet införde på 1880-talet, och kustartilleriet var bakgrunden till många AA-officerare. Liknande system antogs i andra länder och till exempel den senare Sperry-enheten, betecknad M3A3 i USA användes även av Storbritannien som prediktorn AA No 2. Höjdsökarna ökade också i storlek, i Storbritannien ersattes första världskriget Barr & Stroud UB 2 (7 fot optisk bas) av UB 7 (9 fot optisk bas) och UB 10 (18 fot optisk bas, som endast användes på statiska AA-platser). Goertz i Tyskland och Levallois i Frankrike tillverkade 5 meters instrument. I de flesta länder var dock huvudinsatsen i HAA-kanoner fram till mitten av 1930-talet att förbättra befintliga, även om olika nya konstruktioner fanns på ritbrädor. F: Vad betecknade britterna Sperry-apparaten som?
Anti-aircraft warfare In 1925, the British adopted a new instrument developed by the Vickers. It was a mechanical analog computer Predictor AA No 1. Given the target height, its operators tracked the target and the forecaster produced bearings, quadrant height and fuse setting. These were electrically taken to the guns where they were shown on repeater-wheels to the bearings as 'matched pointers' (goal data and the actual data of the gun) to lay the weapons. This system of repeater-electric dials was based on the arrangements introduced by the British coastal artillery in the 1880s, and the coastal artillery was the background to many AA officers. Similar systems were adopted in other countries and, for example, the latter Sperry unit, designated M3A3 in the United States was also used by the United Kingdom as the predictor AA No 2. Altitude seekers also increased in size, in the United Kingdom, World War I Barr & Stroud UB 2 (7 feet optical base) was replaced by UB 7 (9 feet optical base) and UB 10 (18 feet optical base, which were only used on static AA sites). Goertz in Germany and Levallois in France produced 5 meter instruments. However, in most countries, the main effort in HAA guns until the mid-1930s was to improve existing, although various new designs were on drawing boards. Q: What did the British label the Sperry device as?
Förutsägelse AA nr 2
Prediction AA No 2