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Portable, variable height piers; any good designs?

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#1 opticsguy

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Posted 30 July 2014 - 08:02 AM

Interested in designing and to build a "portable", variable height pier for a large refractor. Any recommendations? Tube weight about 150 pounds. Practical first-hand experience preferred.

Thank you!!

#2 Midnight Dan

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Posted 30 July 2014 - 08:22 AM

Can't imagine how the phrase "tube weight about 150 pounds" and the word "portable" can co-exist in the same post. :lol:

-Dan

#3 frolinmod

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Posted 30 July 2014 - 09:08 AM

How about one of these from Lunt Engineering?

#4 opticsguy

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Posted 30 July 2014 - 10:11 AM

OP here. Portablity is always relative to the individual. 2 people can move the OTA easily, however, raising it to the 7 foot height needed is a struggle and safety concern. So, moving the OTA to a pier at the 3 or 4 foot level and then raising the pier to the needed height is my thinking.

The Lunt tripods have a raising pier of only 4 inches and cost about $2000.

I have several ideas on how to do this but curious about ideas that are much better than mine.

#5 Raginar

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Posted 30 July 2014 - 02:59 PM

I have one. It's the original manufacturer of the Piertech astro piers. The company is called Linak. The one I have can lift 200 lbs. they do have other models. Search google for Linak DL2 and cloudynights and you should find the threads.

Mine is mounted in an observatory. The thread I was following was a portable version.

#6 Footbag

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Posted 30 July 2014 - 03:08 PM

How about one of these from Lunt Engineering?


These new Lunt's look awesome!

#7 Astronewb

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Posted 30 July 2014 - 09:19 PM

Here is one that is designed for about a 400 pound payload if I remember correctly:

http://www.altairast...&cat=320&page=1

The problem is that I envisage a 150# refractor being about 180 inches long, in which case the ota is going to be scraping the ground at any reasonable viewing altitude..:)

Regards...Paul

#8 opticsguy

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Posted 30 July 2014 - 11:24 PM

The Altair Starbase Ultra Stable Field Tripod / Pier system has a fixed height, no ability to raise the OTA several feet.

#9 Raginar

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Posted 31 July 2014 - 10:59 PM

The Pier Tech can do it.

You know, like I posted above :I.

#10 Hilmi

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Posted 01 August 2014 - 10:04 AM

Somebody recently posted a video showing how they used a hydraulic lift table to raise the OTA to an acceptable height for installation on dovetail clamp. That might be a lower cost option.






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