Malahini seats

Designs for inboard or outboard power

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Hercdrvr
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Malahini seats

Post by Hercdrvr » Thu Sep 29, 2016 4:53 am

I'm playing around with different seat angles. The seats per the plans feels way too much like a straight up and down church pew. My little wife likes a straight chair and church too but I want more of an F-16 seat position.

Any advice out there,
Matt B
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Back seat angle, too much?
Back seat angle, too much?

PeterG
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Re: Malahini seats

Post by PeterG » Thu Sep 29, 2016 6:31 am

Looks like a great start. I have this in mind for my boat project too. I did a search for the best boat seating ergonomics and a lot of info came back. The most consistent seat design seems to have a 10 degree down angle for the seat and 100 to 115 degree angle of the back to the seat. Here is a decent example for seating design guidelines: http://www.diy-wood-boat.com/Ergonomics.html
The dimensions given look like a great place to start, definitely mock it up and try it out in your boat.
In your picture the seat angle looks good, the angle of the back looks a bit more reclined than 100 degrees angle to the seat. BUT, it is all in what you want, after all that's why you are building a boat instead of buying one...
Murphy's Law: Anything that can go wrong, will go wrong.
Griffin's Law: Murphy was an optimist.

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DrBryanJ
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Re: Malahini seats

Post by DrBryanJ » Thu Sep 29, 2016 8:04 am

peter: when you say 100 -115 degrees. Is that measured from horizontal or from the seat bottom. (110 -125 from horizontal)
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."
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PeterG
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Re: Malahini seats

Post by PeterG » Thu Sep 29, 2016 8:44 am

Measured from the seat bottom. Using the guidelines from the web link with the seat back angled at 20 to 25 degrees from the vertical, and the seat bottom angled down 10 degrees, that would make for 100 to 105 degrees angle between the seat bottom and seat back. I would start with the 100 degree angle and vary to what I consider comfortable.
Murphy's Law: Anything that can go wrong, will go wrong.
Griffin's Law: Murphy was an optimist.

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rbrandenstein
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Re: Malahini seats

Post by rbrandenstein » Thu Sep 29, 2016 12:05 pm

Here is a diagram of my seats. I am at 96+ degrees, but as I told Matt at G10, the back could have just a little more back tilt. Sounds like 100 degrees would be about right.
Seats.JPG
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Bob
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Hercdrvr
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Re: Malahini seats

Post by Hercdrvr » Thu Sep 29, 2016 8:25 pm

Great replies, Bob, nice diagram with measurements and angles. My mock up seat is very close to your dimensions
with an extra 10 degrees recline.

Thanks, Matt

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gap998
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Re: Malahini seats

Post by gap998 » Sat Oct 01, 2016 3:23 pm

I've found this successful in the past. Specs are for lounge seating, but are a good place to start.
Seating Ergonomics.jpg
Gary

Planning a whole fleet, but starting with a Zip...I think.

"Just when you think you've made something idiot-proof, someone builds a better idiot!"

slug
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Re: Malahini seats

Post by slug » Sat Mar 04, 2017 4:40 am

Note that ALL these theoretical specs are dependent on having room to put your feet after the seat is installed. On my Gentry as built and finished to plan (unfortunately!) I have had to constrict the back angle and make the seat shallower (16") in order to have room for my feet! :(
Something to keep in mind when deck framing. I thought I was OK .
It definitely feels like a gentleman's racer now :?

Doug

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Bill Edmundson
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Re: Malahini seats

Post by Bill Edmundson » Sat Mar 04, 2017 6:23 am

This is why I recommend the 10% stretch. In the early '60s, the average man was 5'-8". A pro-football lineman might be 230# to 250#. Today those numbers would be 6'-0" and 350#.

Bill
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slug
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Re: Malahini seats

Post by slug » Sat Mar 04, 2017 9:10 am

Bill; Thanks for confirming I'm an average man (5'8") My wife has questioned this at times, me being a boat builder and all! :lol:

Doug

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Bill Edmundson
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Re: Malahini seats

Post by Bill Edmundson » Sat Mar 04, 2017 9:23 am

Doug

I'm 5'-8" also. We're the average height for a Viking. They were considered giants.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

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gap998
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Re: Malahini seats

Post by gap998 » Sat Mar 04, 2017 10:25 am

5'8" is giant - It's a good 2" taller than a normal man! :wink: :lol:
Gary

Planning a whole fleet, but starting with a Zip...I think.

"Just when you think you've made something idiot-proof, someone builds a better idiot!"

Moeregaard
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Re: Malahini seats

Post by Moeregaard » Sat Mar 04, 2017 1:41 pm

I think we went with 8.0 degrees from vertical on our Zip's seating, and if I were to do it again I would probably increase this to 12--15 degrees. Ours just seems a little too vertical. I would go out to your car, set the seat at some angle everyone likes, and use that as a starting point.

-Mark Shipley
A boat is just a wooden box with no right angles.

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Bill Edmundson
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Re: Malahini seats

Post by Bill Edmundson » Sat Mar 04, 2017 1:48 pm

Mark

That is exactly what I did.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

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mrintense
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Re: Malahini seats

Post by mrintense » Mon Mar 06, 2017 6:54 am

Yeah, I would like to see some of the more informative posts like this get pinned so that they stay within a click away. Good information.
Carl

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