Tip Top Tier Drop

Design & Construction of anything that's not a teardrop e.g. Grasshoppers or Sunspots

Tip Top Tier Drop weight measured

Postby WizardOfOdds » Mon Jul 18, 2016 8:25 pm

I finally got around to weighing the Tip Top Tier Drop (Pisa Ed) at the local landfill. The result: 550 lbs (+/- 10 lbs; the scale had a granularity of 20# and vacillated a little). This is just the empty trailer (includes tonge jack but no mattress or any equipment), and a little less than I anticipated. I expected the Pisa Edition to weight a few pounds less than the original, but it now looks like my original estimate was a bit heavy. (That estimate was made by adding up the volumes of various wood parts and applying an estimated density. It gave an estimate of 570# plus 30# allowance for metal hardware for a total of 600#.)

I am happy with the results because it falls within my desired envelope for towing with a 4 cylinder TV and I doubt I can bring the total down much without major concessions.
WizardOfOdds: Chalet shaped rag roof clam shell TIER drop for 4 cylinder tow
Tip Top Tier Drop thread http://www.tnttt.com/viewtopic.php?f=5&t=56232
Unusual Designs thread http://www.tnttt.com/viewtopic.php?f=5&t=64495
Tale of 2 Trailers thread http://www.tnttt.com/viewtopic.php?f=35&t=61451
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WizardOfOdds
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Re: Tip Top Tier Drop

Postby OP827 » Thu Aug 18, 2016 9:10 pm

Thanks for sharing. I really like the simplicity and yet great functionality of your design. I have read your thread in full now and noticed that back in 2014 you were looking for a free CAD program which can be used for modeling moving parts. I had the same need and found that in sketchup I could use move and copy tools in combination with layers to create copies of moving parts to view them in separate layers. I also had difficulties learning sketchup until I found (in my opinion) some very good tutorials to learn how to use sketchup here: http://jayscustomcreations.com/sketchup/
Using keyboard shortcuts saves me a lot of time and makes 3D modeling much quicker.

I wish you and yours all the best. Hope to see more of your creative thinking.
My foldable foam trailer build: http://www.tnttt.com/viewtopic.php?f=50&t=61344
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Re: Tip Top Tier Drop

Postby WizardOfOdds » Fri Aug 19, 2016 9:22 pm

OP827 wrote
Thanks for sharing. I really like the simplicity and yet great functionality of your design. I have read your thread in full now and noticed that back in 2014 you were looking for a free CAD program which can be used for modeling moving parts. I had the same need and found that in sketchup I could use move and copy tools in combination with layers to create copies of moving parts to view them in separate layers. I also had difficulties learning sketchup until I found (in my opinion) some very good tutorials to learn how to use sketchup here: http://jayscustomcreations.com/sketchup/
Using keyboard shortcuts saves me a lot of time and makes 3D modeling much quicker.

Thanks for the kind words and the tip on Sketchup. The reason I wanted a CAD that does moving parts is to help in dealing with an issure I call "lock down", a situation in which the trailer can be in either of two configurations (open or closed state) but can not move from one to the other because some parts limit movement before the other state can be reached. I call it lock down because I first encountered it with a design in which you could not lift the upper portion because as you lifted the back end, another part of the top needed to first rotate slightly downward (before reversing and raising upward). This is only a problem with multiple pivot designs. The fix was to accommodate the small downward movement with cutouts in the base, but the depth of the cut was not easy to calculate. I recall writing a program which displayed all the moving links for various degrees of opening, but it was still trial and error to get the cut out depth. I also recall there was a freeware program for doing stick figure cartoon characters with multiple pivots which calculated and drew the new locations of connected links as you move one of the joints, but I never got around to investigating it much.

Right now I'm busy with other things, but I'll try to see if I can draw up a stick figure to illustrate the problem. I'll also give Sketchup a try after looking over your tutorial links. Thanks for the tip!
WizardOfOdds: Chalet shaped rag roof clam shell TIER drop for 4 cylinder tow
Tip Top Tier Drop thread http://www.tnttt.com/viewtopic.php?f=5&t=56232
Unusual Designs thread http://www.tnttt.com/viewtopic.php?f=5&t=64495
Tale of 2 Trailers thread http://www.tnttt.com/viewtopic.php?f=35&t=61451
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WizardOfOdds
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