Build 97 on 40s Expo Build
- Thread starter ExpoMax
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- #222
Haha thanks!
I ended up with about 2” between the door and sub. Already being a shallow mount sub, there is plentiful room for it to extend.
Wow just read through this all, love the build. This is awesome stuff right here, keep up the great work!
What are the details on that antenna you are running in the stock spot?
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- #225
Just a Walmart special!!
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- #226
Got my bumper built....for the most part. Still need to decide if I want real quarter panel protection.
- finished it the night before a Moab trip! Soo nice having a swing out.
- finished it the night before a Moab trip! Soo nice having a swing out.
Thats gonna wiggle quite a bit
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- #228
Doesn’t move at all. Maybe have 1/4” of movement because I haven’t secured the corners of the bumper yet. Will do so when I decide on stuff for the quarters. Everything is double shear and 2x2x1/4” so I have a hard time believing I could of possibly built this thing stronger.
You have over a hundred lbs cantilevered several feet over a 2" square tube thats anchored several feet away from the moment.
Not hating, this is the reality of all swingouts of this style. Youd need to anchor in a third spot (roof?) to form a plane rather than rely on the modulus of your 2" tube to hold it firm.
Just for fun, a 2", 0.25 wall diameter round tube (which is more rigid than a square tube) of 30" long with a 36" lever arm on it will act like roughly a 200lb/inch torsion bar. That's assuming your bushings and pivots are perfectly rigid and the arms are perfectly rigid and a bunch of other stuff that isn't even true.
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- #231
It’s going to be getting finished up this week, so I’ll post up pictures this weekend.
Agreed. But I don't like the idea of anchoring something that is attached to the frame to the roof. Too much movement.
Looks good.
Doubling up the bottom 2x2 (one on top of the other) of the swingout and stitching the two would reduce torsional flex.
I have marks on my tailgate from my carrier that was "never going to move" making contact.
While nothing is rock solid without some extensive triangulation and/or another mount, IMO building in double shear on both ends adds an immense amount of strength and rigidity compared to all the single shear swingouts available commercially.
Totally agreed and good point.
SameDoubling up the bottom 2x2 (one on top of the other) of the swingout and stitching the two would reduce torsional flex.
I have marks on my tailgate from my carrier that was "never going to move" making contact.
Meh. At best, it doubles the torsional rigidity since it has to twist both sides of the arm. But I doubt the locking pin is an interference fit
and those little red bushings are going to be pretty compliant with that sort of lever on there.Meh. At best, it doubles the torsional rigidity since it has to twist both sides of the arm. But I doubt the locking pin is an interference fit
Definitely not a good ol interference fit! Ha!
I agree that the poly bushings and pin are the limiting factor for him now. Did you ever have to rework the Labs bumper to better handle your spare?
Never did. Im just moving it in the cab and laying it on the floor for now
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- #238
Agreed. But I don't like the idea of anchoring something that is attached to the frame to the roof. Too much movement.
Looks good.
Doubling up the bottom 2x2 (one on top of the other) of the swingout and stitching the two would reduce torsional flex.
I have marks on my tailgate from my carrier that was "never going to move" making contact.
I think what I did is plenty for that spare. Maybe if I go to 44s I’ll do what you guys are suggesting. But to actually have any usuability at all both you and @nukegoat ideas are out. I see no reason to fix how much rotational force is put on that bar. That’s how I designed it, and it is welded/guesseted accordingly.
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- #239
Totally agreed and good point.
Same
Actually think I just had a decent idea...maybe. Essentially just have 3 or so gussets that come down from the swing out and just rest on the face of the base 2x2 piece. Would that not reduce most of that rotational force, and simply transfer it to the bottom part that is actually welded to the frame?
@NateMob @mudgudgeon
Sorta like this
If its bound (preloaded) when closed and youre reacting right at the intersection of the upright, then maybe. But the loads at that location are very high.