Click to enlarge.
A1: Top of the ramp.
A2: Pitch at the base of the ramp.
A3: Top of the 60ft pitch above the ramp.
B1: Top of the 50ft pitch.
| Scanned slides by Frank Addis (1985). Click to enlarge. A1: Top of the ramp. A2: Pitch at the base of the ramp. A3: Top of the 60ft pitch above the ramp. B1: Top of the 50ft pitch. |
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