Now the wooden structure of the obsy was designed and built by a professional shed builder. Some aspects of the design were developed even as the structure was being built. The main specifications was that it had to be tall enough to fit the telescope in place and allow me to walk inside without having to stoop. I did not want it to be too large, so it ended up a footprint of 1.8 x 1.8 meters. But it is also definitely tall enough to walk in even with the roof closed.
As a wooden roof would prove to be too heavy, a compromise was made to have polycarbonate roofing, which would still be very strong. The plan was to insulate the entire shed anyway, so the shed should not become a greenhouse, particularly during the summer months.
Next came the task of painting the shed both inside and out. My youngest daughter did help with painting the inside of the obsy. It already looks so much nicer.
Now one of the problems encountered was that the roof opening mechanism protrudes into the obsy when the roof is open, so we had to think of how to change the design so it would still open and close the roof properly but not protrude into the obsy at all.
In the meantime I proceeded with insulating the entire obsy – roof, walls and even the door, using AirTec double reflective bubble foil and a staple gun. I also used foil tape to secure the edges to the wooden frame.
Next came the task of using black waterproof and windproof roofing underlay (Protect A1) to line the roof and walls. I used upholstery pins to secure these reinforced plastic felt sheets in place. It was also around this time that the roof opening and closing mechanism was sorted out.
Now the 3 outstanding things left to do are:
- Extend the chains securing the roof on the right side to allow it to open even further out, so as to give more access to the sky. You can see from the picture above that it does not open out as much as the left side.
- Secure some garden shading netting to the outside of the polycarbonate roof to protect the obsy from heating up too much during summer.
- Mount the telescope in there and start imaging.
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