Hour Dial for Solar Motion & Position Demonstrator

Add an hour dial to your Solar Motion & Position Demonstrator to show how time is related to the position of the sun in the sky.  The original demonstrator is available from here:  Solar Motion & Position Demonstrator by 3DMason | Download free STL model | Printables.com

How to Install

Rotate the analemma crescent so that it is parallel/aligned with the latitude crescent. Undo the top pivot screw located on the analemma crescent & place in the hour dial face up. Make sure to pick the correct dial; i.e. northern vs. southern hemispheres. Reinstall the screw through the available hole located at the center of the hour dial.  Making sure that both analemma & latitude crescents are still aligned, rotate the 12 o'clock marking on the hour dial so that it is in line with the bottom portion of the latitude crescent.  Tighten the screw.  The dial should rotate in unison with the analemma crescent.  If it doesn't then apply a bit of glue where the bottom of the dial meets the top of the analemma crescent so that the dial remains coupled to the analemma crescent.  Make sure not to put glue in the pivot point area or on the latitude crescent.

How to Read

Read the time in relation to the position of the sun by rotating the analemma crescent about the observer.  You can place a dot on the latitude crescent near the bottom of the dial to simplify the reading, as shown in the image below.

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