Wild Heerbrugg RDH
Tachymeter using a horizontal staff.
Product details: Wild Heerbrugg RDH | Wild Heerbrugg | Tachymeter | Survey | Material: Brass
The Wild RDH or Reduktions Distanzmesser für waagrechte Latte was based on the T16. It required the use of a special horizontal staff mounted on its own tripod stand. The stand and staff are very cumbersome and actually were orginally not included with the object. I obtained this one from a geodetic college ('Hochschule') where they do not seem to have had much use as is customary for a school (take 'm out a few times a year at most). When I asked them if they still had the staffs they came up with one after a long search. It cost me a little extra and a long wait as the mail does not take objects this long. One of their teachers dropped it of at my house during a visit to the Netherlands. Otherwise I would have had to travel to Munich, quite a distance. It would have been worth it tough as the staffs are the rare part.
Measuring with the RDH is not very straightforward as the manual will tell you untill you understand the way the staff is set up. Without it, the insrument cannot be used properly (in contrast with the RDS from the same era). The image is splitt in two using an optical wedge allowing two parts of the staff to be viewed at the same time and brought into coincidence.
More information / other collections
RDH
Data sheet
- Year
- 1952
- Serialnumber
- 30185
- Type of use
- Survey
- Material
- Brass
- fine reading
- direct (analog)
- image direction
- inverted
- magnification
- 25
- field of view @1000m in m
- 28
- weight instrument in kg
- 7.2
- Size case (l x w x h) in m
- 0.16 x 0.24 x 0.44
- weight case & in kg
- 7.0
- country obtained from
- Germany
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Tachymeter using a horizontal staff.
Product details: Wild Heerbrugg RDH | Wild Heerbrugg | Tachymeter | Survey | Material: Brass