mmog balance bags ala aarn
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Daniel Lemieux
(Dichotomous) - F
mmog balance bags ala aarn on 09/08/2011 11:21:05 MDT Print View

so seeing the aarn theories, I have a thought that adding some pockets up front might be nice, and have the ability to do so to my bag. but I have some questions:
1. having a gut or having boobs are often cited as reasons for back pain, so wouldnt adding weight up front be bad?
2. wouldnt weight be handled best closer to the spine to reduce torsion loads? they completely miss this fact in their force diagrams, somehow the loads on the regular bags show as torsion loading, but that is all gone with theirs..... when in reality if you loaded the front pockets, they are typically more than 12" FURTHER away from the spine, which would cause HIGHER torsional loading... need explaination on that one.

Daryl Daryl
(lyrad1) - MLife

Locale: Pacific Northwest, USA, Earth
Re: mmog balance bags ala aarn on 09/08/2011 15:21:15 MDT Print View

Daniel,

I can't answer any of your questions but I have used a front bag for well over 10 years. Last year I made a pack for a friend of mine and he is now a front bag user as well.

Here's a link for more info:

Daryl

front bag

Edited by lyrad1 on 09/08/2011 15:21:52 MDT.

Brett Harrison
(nihil) - F
Aarn on 01/01/2012 22:19:39 MST Print View

Check out this very long thread on Aarn packs. Towards the end I explain a bit about how they work and others weigh in with detail about the reservations and experiences.

http://bushwalk.com/forum/viewtopic.php?f=15&t=1038&hilit=aarn

I have two and I love them. It's gives you back your natural center of gravity, which, in the context of backpacking, is revolutionary, IMO.

Daryl Daryl
(lyrad1) - MLife

Locale: Pacific Northwest, USA, Earth
Re: Aarn on 01/02/2012 10:46:43 MST Print View

Brett,

Thanks for the link. Interesting to see what people say about the concept.

I also use a pack with front bag. Love it. I made one for a friend and he is now a convert. I think a person has to try one for awhile to know if it works for him/her.

Daryl

Daryl Daryl
(lyrad1) - MLife

Locale: Pacific Northwest, USA, Earth
Ladder Comparison on 01/04/2012 20:50:41 MST Print View

When I use my backpack with a front bag my body feels in balance(i.e. I'm not straining forward or backward) The "feel" of things is similar to what I feel with the balanced ladder in this photo.

here

The ladder comparison is a bit confusing because there is an equal amount of ladder in front of and behind me. With a front bag backpack the front bag has much less weight than the back bag but,with a little trial and error, I can adjust things so my body feels in balance.

(edited to reduce confusion over the word "balance")

Edited by lyrad1 on 01/04/2012 22:14:37 MST.

David Thomas
(DavidinKenai) - MLife

Locale: North Woods. Far North.
Re: mmog balance bags ala aarn on 01/04/2012 21:36:58 MST Print View

Carrying a baby in front is harder than carrying a much larger toddler on my back.

I've carried rucksacks front and rear to aid a weaker hiker. But I wanted less than half of the weight to be in front.

When I've had to carry another person's BP (NON-UL!) plus mine (this was in the 1980s), I'd lash their's above mine - both on my back. Their 55 pounds in back and my 25 pounds in front was still too front heavy.

Based on all of that, I'd say less than 1/4 of total weight, probably better 1/5 of total weight could go in front.

You are not a sideways burro that needs equal loads on each side. Think of your back more like the burro's back (lots of weight) and front like the burro's nose (little of no weight).

Daryl Daryl
(lyrad1) - MLife

Locale: Pacific Northwest, USA, Earth
Re: Re: mmog balance bags ala aarn on 01/04/2012 22:02:07 MST Print View

David,

What you say is correct so my ladder comparison has only confused the issue.

When I'm wearing my backpack the back bag might have 20 lbs or so and the front bag maybe 5. I'll move things between bags until I feel in balance, even though the bags are far from balanced in a weights and measures type of way (i.e. they are far from being equal in weight).

The "feel" of my pack when the contents are correctly apportioned between front and back bags, however, is similar to the way I feel when the ladder is balanced like in the photo. I'm not straining forward or backward to keep myself in balance. Carrying a canoe near the mid point would have a similar feeling.

Daryl