Braced swinging
- Thread starter Seags
- Start date
Dellortoman
Hero member
- Location
- Tasmania, Australia
Hmm ... It doesn't look like any of the better known products (eg: Metmachex, Calfab, Kwick) so no idea who made it. But I'm guessing it wasn't designed by an engineer.
I was in a bit of a quandary as whether to say anything, because any negative comment could put off potential buyers. But when you post something for sale on a public forum, I suppose you open it up for general comment. So, for what it's worth, my opinion as a mechanical engineer is that the bracing is ineffective. That doesn't necessarily mean the swing arm is not fit for purpose. It just means that the bracing is decorative rather than structural.
It's almost there though. Its structural rigidity could be massively improved with a couple of little struts added to it. So it's certainly not a piece of junk. Perhaps a more optimistic way to look at it is that it's un-finished.
Sorry Seags. No offence intended. It simply is what it is.
Edit: Rather than make vague inferences about the design of the brace being less than perfect, I've re-attached one of the photos with some yellow lines added to show where additional bracing should go (precise placement will obviously need to avoid interference with the chain). Those small additions would make the brace way more effective and the swing arm very rigid indeed.
Engineering Rule #1. The key to making rigid structures is to use triangles rather than parallelograms.
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piranha-bro2
Hero member
- Location
- Melbourne
Don't think so, Paul - just looks that way when the thing is upside down. Does the brace need to be that 'deep'? Reminds me more of a monoshock mount than actual bracing (if it was upside down!!).brake bracket wrong side
Dellortoman
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- Location
- Tasmania, Australia
Dunno, but I guess it was made that way to allow plenty of room for the chain. What's it supposed to fit anyway? I'm guessing a Laverda triple, but could be a 750 I suppose.
Dellortoman
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- Location
- Tasmania, Australia
Is that why they're called swingers?
You can tell for sure by the Adirondack chairs on the front lawn
http://www.tipsfromtown.com/umm-youll-never-guess-what-your-lawn-furniture-might-say-about-you/
martymoose
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- Location
- Sydney, Australia
chrisk
Hero member
- Location
- Brisbane, Australia
Whot Mart?
MarnixSFC
Hero member
.. in a 750, yes, but believe a 750 swinger in a 180 triple fouls the frame?
hooksey
Hero member
- Location
- Vic , Australia
Negative..........but is tight ! Can certainly slot in some bigger rubber tho
martymoose
Hero member
- Location
- Sydney, Australia
Was just interested in the design, looks solid enough
piranha-bro2
Hero member
- Location
- Melbourne
I swapped my SF swinger to TTW and it now lives happily in his 180 frame (yes, with more rubber).Negative..........but is tight ! Can certainly slot in some bigger rubber tho
This is my replacement:
