Thread: Light weight seat build
03-31-2010, 11:40 AM #1
Light weight seat build
Well since I got this old seat here, I decided I'm going to make lightweight seat out of it.
I already took the foam off completly from the seat frame. The middle plastic was cut at some point before I got it. It looks like it was cut along the seam for sealing the seat in the back. Maybe for more air?
The middle of the seat had a big chunk missing too. maybe for f/a"s?
so I cut the rest of the middle completly out now, just the seam to seal it is left. it's quite strong still and snaps right on the ski still nicely. I left the double edged front on it for support for the hinges.
I took some cardboard and made a templete for the fiberglass. trimmed as necessary to get a good fit. looks good. Found some metal that will go across the seat for support. I will glass those into the fiberglass.
The seat weighs 5 lbs empty all cut. We'll see how low I can keep the weight.
Now I'll cut the glass to fit the templete with a little oversizing for trimming later on.
I'll be using some thicker roven cloth. Very strong stuff. About 3 layers should do the trick!. Then glass those metal bars into the 2nd and 3rd layers.
I'm gonnatry to find some waterproof foam thats super lightweight and try to keep the seat under 10 lbs.
Will be using the Pros original seat cover for this poject. When I take that seat in to get recovered,Ill swap the cover to this 1It has 1 cut in the seat but other than that its decent. I'll fix that also before putting the cover on.
03-31-2010, 11:54 AM #2
03-31-2010, 12:25 PM #3
- Join Date
- Jul 2007
- near Toronto, Canada
Do not underestimate how much loading the seat might need to handle.
When you come off a good sized wave and slam back down onto the seat harder than normal, the instantaneous loading can be rather high. Twice your body weight, maybe more.
The stock seat pan handles those high loads in part by flexing and deforming, then recovering. Your re-engineered seat needs to either be able to absorb the force by flexing (but not too much), or it needs to be very stiff and strong.
You might consider creating a shallow curved metal dome to cover the entire opening, with the bump facing upwards. A curved surface is stronger than a flat plane, especially a convex shape.
03-31-2010, 01:43 PM #4
I have more supports for it if needed. I agree with the loading of it. we'll see how the glass holds after its glassed in. May just pop off. Not sure, may have to screw the glass to the plastic while its wet and then it would be strong enough not to be pulled thru if I bounced on it hard.. Maybe a another support in it too. We'll see what I come up with. lol
Just a prototype here so.. anything could happen.lol! long term project to experiment with.
03-31-2010, 08:26 PM #5
- Join Date
- Sep 2006
have you seen sniper he looks like skin an bones , now just dont let a fat-ass like me ride it
04-01-2010, 08:12 AM #6
Yeah true,, lol I'm thinner than fatter . Thats for sure.. There will be a weight limit on that seat!
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