|Object Name:||Altimeter & TAS Indicator|
|Year of Manufacture:||1966|
|Location:||Archive Object Store|
Height & T.A.S. Display
Type No. 3D390
Ref. No. 6A/5407
Ser. No. 172/66
A.D.S. Nos: 10, 22, 53, 61, 66, 78, 87, 108
Marconi Collection Ref: 2052
The MoD Operational Requirement (OR946) of the 1960’s had a requirement for vertical tape instruments following the US fashion and Elliotts made a range of these. These instruments were designed by Markowski and Stafford Ellis.
The principle proved to be wrong and they were not as good as round instruments dynamically. Only one of the Elliott units remained in service, the TAS/Height which was used on the Buccaneer and the Concorde prototypes were also fitted with vertical tape instruments. However the production version of Concorde ordered by BOAC reverted to conventional dials.
The reasons for the reluctance to go for linear presentations (despite the fact that space is saved) were mainly based on the fact that linear displays can be difficult to read accurately, can give difficulty in comparing readings and provide a less informative rate reading than does a rotating
pointer. Another point is that it is difficult to get a natural
sense of motion on vertical tape instruments.
Moving Tape. Exptl
Marked as GEC Avionics