Reply by Simeond

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Posted on Conoid Rocking Chair

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79 posts in 2367 days

#1 posted 09-09-2012 01:47 AM

Well, it is finished!

What a ride this project has been! I did a full scale mock-up in MDF (which was helpful conceptually, but not to get precise angles, since the actual weight of the whole piece matters to how the legs and seat were angled).

First, I discovered that BECAUSE it is a rocker the stress on the joinery is LESS than a stationary chair. With a stationary chair, there is a lot of torque on the joints. With a rocker, when you torque a joint, it ROCKS. :) That said, this chair is VERY stable. All the joints are 8/4 wood at the joint and at least 3” wide. I then sculpted away from the joint for a more delicate flowing look.

Also, knowing that the CoG changes once someone sits in it, I made it accordingly. Thus, when it is empty, it leans back further than normal rockers would.

The customer it is for didn’t want arms. However, I had the piece in a furniture show last night (at least 200 people – of all sizes – sat in this chair) and a number of people asked if there could be arms. I got another order for one, this time with arms. I think I will continue the “legs” up to arm height and then wrap the arms around back to the spine. This will also add side-to-side stability to the spine.

The spine has great strength in the direction of typical pressure. However, it does have a side-to-side wobble. That isn’t the direction of typical pressure, but that’s the one issue.

There are a few other considerations, but I’ll turn it over to you folks for comment, Thanks everyone for your thoughtful input!!!

-- "...a band of small discoveries, strung like pearls on a thread of curiosity, lending richness to our work...." - James Krenov.......

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