the build

Are we really doing this? On the same day I knew where I wanted to build it, I started digging. First we needed to transplant a walnut tree which decided to grow beside my chosen place. Easier said than done but after some swearing we could begin to dig the hole that would later support the telescope, it its around 80cm deep and has a length and width of one meter.

My sister helping me dig the main hole for the mount fundament.
The fundament is reinforced by steel.

The observatory is completely decoupled from the mount, a step necessary to reduce vibrations. The needed fundaments (11 in total) were dug with the help of a gas-powered drill a neighbour lend me (Thanks again!). This part was actually rather enjoyable although anything but relaxing.

The infamous gas-powered hole digger.

As you can see we used a sewer pipe (2m long, 25cm diameter) as our base for the mount. The pipe is equipped with sockets and everything needed to supply the equipment with power without getting caught in electric wiring. I also mounted hooks for the remote controls and drilled holes in the lower part of the pipe so the concrete and the reinforcement steel create a solid connection.

The prepared sewer pipe.

The connection between the concrete in the pipe and the equatorial mount, a Losmandy G11, is realised by an adapter made by JD Astronomie. The quality is top notch and it will allow me to upgrade to an EQ8 by Skywatcher if necessary. It also makes me want to own a lathe 😀

The adapter minus the part made for the Losmandy.

Okay in all honesty I got help for the hard work. We used approximately 3.5t of concrete for all the fundaments so I guess thats okay. I also got help cutting all the wood. A craftsman we knew helped to find faults in my design and delivered the material based on my construction plan.

Reassuring my measurements were correct (Fortunately they were).

The next step was filling the pipe with concrete and adding the adapter. At a temperature of above 32°C quite exhausting. It also needs to be guaranteed that it wont dry to fast which I did by simply keeping it wet for the next days.

120kg later it is all filled up,…
…aligned and leveled.

After a few days drying up I began to wire the sockets and painted the pipe black. This helped a lot in creating a more professional look (and subsequently destroying the “sewage”-association). The next step was digging the trench (80m long) for the power cable. Til today I think about the missed chance to rent an excavator…

Mogli inspecting my work.