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48 points choult | 3 comments | 15 Oct 24 18:28 UTC | HN request time: 0.205s | source

1. matsemann ◴[15 Oct 24 20:11 UTC] No.41852608[source]▶

>>41851569 (OP) #

But the sun isn't always at the same place at noon? So how is the magnifying glass aimed?

replies(2): >>41852948 #>>41855456 #

2. Pengtuzi ◴[15 Oct 24 20:48 UTC] No.41852948[source]▶

>>41852608 (TP) #

Down and to the left

3. perilunar ◴[16 Oct 24 03:56 UTC] No.41855456[source]▶

>>41852608 (TP) #

Same azimuth, different altitude. You could adjust the altitude angle daily, or just set the fuse along the north-south axis, and it will be lit in a slightly different place each day.

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The Sundial Cannon of Åtvidaberg (2017)