| Description | The file contains Theatre Projects Consultants Ltd correspondence with the clients and various contractors and consultants regarding power flying, including problems with the Lyttelton house curtain; disagreements over Hall Stage Equipment Ltd's fee and whether they are going to complete or refuse to continue; noisy motors; the state of completion of the contracts for sub-contractors Hall Stage Equipment Ltd and Mole Richardson (Stage & Studio Engineering) Ltd; snagging, faults and remedial works; sound tests; the traction wire resetter drive; the poor state of the work and lack of completion of the power flying machinery; the sudden departure of Evershed Power-Optics Ltd's engineer and unauthorised modifications he made; acceptance tests; problems with the control system; the completion and acceptance of Evershed Power-Optics Ltd's systems; failure of the house tabs; replacement of the electronic and control equipment; masking screens; and valuation of the equipment. Correspondents include Evershed Power-Optics Ltd; the National Theatre; Hall Stage Equipment Ltd; Denys Lasdun Redhouse & Softley; Sir Robert McAlpine & Sons Ltd; Sound Research Laboratories Ltd; Renold Ltd; the South Bank Theatre Board; Davis, Belfield and Everest; Vickers Ltd; the Greater London Council (GLC); and Tele-Stage Associates Ltd. The file also includes an Electronics and Power Supplement from June 1979 on connectors; sketch number W7909 'National Lower Power Flying - Proposed Control Panel Format'; and sketch number 904/SK/1001 'National Theatre Schematic Details of Proposed Power Flying Modifications'. The original card folder has been disposed of. '4 Power Flying Oct 77-Dec 79' was written on the front, and 904~5B5 the National Theatre File 4 Powered flying Opened. Nov. '77' was written on the spine. |