Thank you for your kind words, "Don't Hang Up".
When I mentioned slanting the instruments I meant slanting them up around the horizontal axis only, like the panels of big jets.
Try this: search on Google for the following, select "images" for each , and then compare the indicators you see.
Which ones are easier to read?
Search words:
- Speedometer
- Vintage Speedometer
- Air Speed Indicator
- Air Speed Indicator Sopwith Camel
Update: It would appear that I have been somewhat vindicated. In a magazine article I came across the aircraft listed below, if you look at the instrument panel below, you would find that the ASI does read from left to right (like a speedometer). The green and white arcs (which in my opinion should be indicated by a large colored dot) are on the left side of the instrument.
Fläming Air English Site - Our aircraft products
See photos under
FA 01 S Smaragd Ul/Ml Sensing