D4 Trapezium

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deuce4

climber
Hobart, Australia
Topic Author's Original Post - Mar 7, 2018 - 09:19pm PT
Proud to announce efforts of last five months: http://www.bigwallgear.com/d4-trapezium.html
Prototype Trapezium #10 built for solo winter big walls in Baffin Isla...
Prototype Trapezium #10 built for solo winter big walls in Baffin Island
Credit: deuce4
skywalker1

Trad climber
co
Mar 7, 2018 - 09:34pm PT
Thats interesting. I'm gonna ask a couple dumb questions, which is my greatest strength. Do you then share foot space? Then does the taller be on the outside? I'm taller. Or does the shape (Line AB against the wall. Line BC Diagonal, Line CA. And Line AB is same as BC) just make it same either way if that makes sense?


Cool!

Thanks

S...

edit: I just did a drawing and so the length is the same you just share a common foot area nearest the wall?
deuce4

climber
Hobart, Australia
Topic Author's Reply - Mar 7, 2018 - 09:49pm PT
People initially think it is too small, but after actually sleeping in it find it fine and appreciate the increased stability. Easy to stretch out comfortably without the fly. With the fly, a bit of coziness with two, but still not too bad. No problem with one. The small packed size is key (25").
skywalker1

Trad climber
co
Mar 7, 2018 - 10:02pm PT
I get what you are doing. Light and stable is nice. Coziness is fine too.


Thanks!

S...
deuce4

climber
Hobart, Australia
Topic Author's Reply - Mar 7, 2018 - 10:08pm PT
Yes, for extended big walls, the full size D4 portaledge is the way to go. But this new tool offers packability and full storm survival for two. Ideal as a single multipurpose ledge, too. Wish I had one when I was in wild adventure mode back in the day!
frostback

Social climber
great white north
Mar 8, 2018 - 06:41am PT
John,
The right tool for the job. Nicely done.
Matt's

climber
Mar 8, 2018 - 07:03am PT
Deuce-- you're creativity is inspiring.

Would love it if you designed a two person Alpine tent in the 3 lb range!
Mungeclimber

Trad climber
Nothing creative to say
Mar 8, 2018 - 11:10am PT
light weight hunter stand?
John Mac

Trad climber
Breckenridge, CO
Mar 8, 2018 - 12:39pm PT
what a great idea. Love the size.

I couldn't find what the measurement were between corners when you are sleeping?

Thanks
Late Starter

Social climber
NA
Mar 8, 2018 - 01:22pm PT
Interesting...looks like a race to the market between this and the new Runout Customs design.
deuce4

climber
Hobart, Australia
Topic Author's Reply - Mar 8, 2018 - 04:13pm PT
Regarding triangular designs, triangles have about 15% less area for a given perimeter of tubing compared to a regular double size ledge. The pure triangle structural truss concept is appealing, but unfortunately doesn't offer any advantage in terms of usable space compared to the same size and weight rectangular design, in my opinion, based on building and testing several folding triangular prototypes.

The trapezoid shape is the way forward for ultralight big wall shelters. I have been thinking of trapezoid frames for some time, and this latest delve into design has led to the discovery of quite a few cool new concepts while building a series of prototypes to optimize the ergonomics, foldability, and ease of setup.

Very excited about the usability of the D4 Trapezium--I believe it is my best work yet in terms of how foldable shelters can be used to push new boundaries on extreme climbs (as well as being a great kids cubbie!).
Mike.

climber
Mar 8, 2018 - 05:29pm PT
Im holding out for the 16 semi-circular XL pizza caddy with patent pending insulated fly with pockets for crushed red pepper and Parmesan.
Moof

Big Wall climber
Orygun
Mar 8, 2018 - 11:23pm PT
Take my money.
T Hocking

Trad climber
Redding, Ca
Mar 9, 2018 - 06:53am PT
Im holding out for the 16 semi-circular XL pizza caddy with patent pending insulated fly with pockets for crushed red pepper and Parmesan.

LOL, a couple beer caddies would be nice too! :)

Good luck with the new design John,
Tad
Late Starter

Social climber
NA
Mar 9, 2018 - 08:30am PT
I'd agree with everything you've stated John, the question for me will be at what price point vs. Luke's ledge will I be wiling to pay for that addn'l. useable space.

Looks like the perfect set-up for me, just a matter of $ (like anything).

Thanks for the innovation/"outside the box thinking"!!
John Mac

Trad climber
Breckenridge, CO
Mar 9, 2018 - 09:18am PT
Can you share what Luke's design is like? I didn't see anything on his website. Thanks.
hooblie

climber
from out where the anecdotes roam
Mar 9, 2018 - 10:27am PT
come on man, show a little respect for the creative, industrious and ever so generous
persona that is the driving force behind the technology that harbors us hacks in the vertical world.

http://www.supertopo.com/climbers-forum/2944881/Good-Bye-Spreader-Bars-and-plug-for-the-new-D4-Portaledge
it's a class act to lay it all out in plain sight, the copyists will be along soon enough

not so much give the man his due, as give the man his day

edited, dammit
Kauait

Big Wall climber
salt lake city
Mar 9, 2018 - 10:43am PT
How about a system that allows you to flag your ledge up and not get destroyed on non overhanging areas?!
deuce4

climber
Hobart, Australia
Topic Author's Reply - Mar 9, 2018 - 12:01pm PT
Thanks for all the good words!

First batch getting sold out, a few left, sign up at bigwallgear.com.

deuce4

climber
Hobart, Australia
Topic Author's Reply - Mar 12, 2018 - 04:25pm PT
Price announced. (below, email sent to first 25 who signed up)

Firstly, Thanks!

I am sending this email to the first 25 people who signed up for the D4 Trapezium.

I am getting more materials this month, and should be able to make the first five production models before May (I will be in the USA May/June). The rest will be made this fall starting in July. I expect to be able to build at least 50 this year, so no worries on getting one by the end of the year, as you have signed up early!

I appreciate your vision, and really believe this new "1.5" ledge will find its way in your adventures with which you never thought about bringing a portaledge. It is a super cool tool and look forward to making one for for each of you.

The price for early adopters will be $590 for the ledge and haulsack, and the fly will be $325. Retail on these will be $625 and $350 respectively. Shipping from Australia to USA should be about $75 or so.

Can you confirm your interest and if you are able to put down a 50% deposit right away. Please also specify if you want the ledge only, or ledge with fly.

I am asking for a deposit in order to make a larger order for some of the parts. One thing you might have noticed watching the video is that the frame really sets up easily. The D4 Trapezium is the first ledge with my new patent pending joint system, which is a major innovation in portaledge technology, and which will also be part of my full size D4 portaledge. This new joiner system makes the ledge assemble like butter, and is a big improvement over the existing sleeved tube design prevalent on all other ledges. Though the new CNC joiners add significant cost to the frame, I feel it is worth it in terms of strength and ease of setup.

Thanks again

___
John Middendorf
Big Wall Gear, LLC
http://bigwallgear.com
http://johnmiddendorf.net
EMAIL: deuce4@mac.com
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