WW II, a British focus  






  1. Details of main armament not already fully reported or which is unusual in type (e.g. multi-barrel rocket projector). If possible specimens for trial in this country should be obtained.
  2. Details of secondary and AA armament not fully reported or of unusual type.
  3. Any data or reports on accuracy of tank guns, particularly those which can throw light on the “target” figures aimed at (e.g. round to round dispersion, variation of jump etc.)
  4. Information on technique employed at the experimental ranges, and in particular, information regarding the methods of obtaining range table data.
  5. Use of mortars in tanks.


  1. Information on hyper-velocity shot and particularly on its accuracy.
  2. Information on hollow charge ammunition to be fired from tanks, if any.
  3. Data on tracer.
  4. Any methods, experimental or in production, of assisting observation of fall of shot.

Sights and Optical Instruments

  1. Any information on rate computing and range finding sights.
  2. Details and specimens of modern eyepieces giving large apparent fields (up to 75 deg) for tank users.
  3. Sights for AA tanks, if any.
  4. Any details of reflector sights giving wide angled fields.
  5. Didymium filters having been found in German tank telescopes. Why were they introduced?
  6. Any reports and data on the problem of magnification and the question of continuously variable versus alternative magnification.
  7. Research and manufacturing data on graticules, particularly as regards illuminated graticules and the problem of obscuration of target by graticule lines.
  8. Details of methods used in producing silvered surfaces in optical components (eg. Range finder prisms), and also information of the durability of such surfaces.
  9. Data on methods of sealing optical instruments.
  10. Information on methods of training personnel to use optical instruments (eg. Stereo range finders).

Fire Control

  1. Information on policy regarding the use of range finders in tanks.
  2. Methods used for indirect fire, including determination of angle of sight.
  3. Methods of correcting for range.
  4. German methods of attack on the problem of obscuration, including specimens and full details of any unusual muzzle attachments, or any modifications to ammunition (eg. Long primers) directed to the same end or any use of flash shutters, or filters.
  5. Information on policy regarding relative merits of flashless and flashing ammunition in respect of concealment of tank against good observation by gunner.
  6. Any information on remote control of guns in tanks.
NOTE: No information was sought concerning the use of infra-red equipment for fire control at night, as this subject has been adequately covered by other investigators.


Any research reports and information on development work on the use of stabilisers in tanks.

Electrical Equipment

  1. Any information on small high speed motors (>20000 rpm), particularly as regards bearings, which might be used as rate measuring gyroscopes.
  2. Use of special suspension such as cross spring pivot or torsion bars for small parts.
  3. Application of radar to tanks.
  4. Test methods and equipment for evaluating turret performance.
  5. Details of high accuracy magslips and selsyns.
  6. Details of high accuracy potentiometers wound with very fine wire, including methods of production and performance.
  7. Any remote indication and remote control devices for repeating angles.
  8. Details and specimens of miniature components (not VHF).
  9. Details and specimens of power supplies for electronic equipment suitable for tanks.
  10. Information on research and experimental equipment for recording purposes, especially those with high natural frequency.
  11. Details of methods of measuring muzzle velocities, particularly portable equipment.
  12. Methods of measuring blast pressures.