smart51
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| posted on 12/7/10 at 01:07 PM |
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How do I make a cycle wing buck?
I want a pair of cycle wings for my 3 wheeled exo trike. I want tyre hugging ones but for very narrow tyres so I can't just buy them. I also
want a nice profile, not the usual flat top and flat sides with radiused edges to them.
I'm good with GRP and once I have a buck, I can make a mould and pull a pair of finished parts from them. I'm not sure how to make the
buck so that it is a) round rather than egg shaped and b) has the same profile all the way round. Oh, and c) isn't going to be a massive amount
of work. How is it done?
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SeaBass
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| posted on 12/7/10 at 01:23 PM |
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To get the radius uniform you'd probably want to laminate up some material to create a block that would include the centre point of the wheel.
You could then mark the radius, bandsaw and sand to shape on a vertical bandfacer as a starting point for your buck shape.
Alternatively use a spare wheel and tyre and attach a known thickness of material to the outside of the tyre? and start from there...
That cabin scooter is looking great BTW - just had a looky through the pics...
[Edited on 12/7/10 by SeaBass]
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coozer
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| posted on 12/7/10 at 01:52 PM |
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How about stretching some cling film over the tyre and taking a mould off that?
1972 V8 Jago
1980 Z750
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smart51
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| posted on 12/7/10 at 02:00 PM |
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quote:
Originally posted by coozer
How about stretching some cling film over the tyre and taking a mould off that?
Ooo now I like that idea. I'd like the wings to have a little more clearance than the thickness of cling film, and a slightly different shape
but there's definitely mileage in that. I'll have a think.
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RichardK
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| posted on 12/7/10 at 02:13 PM |
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What about getting an old tyre of the correct size and filling it up with expanding foam, cut off the tyre, cut in half and hey presto two bucks!
Just thinking aloud so could be a rubbish idea as I've never used grp!
Cheers
Rich
Gallery updated 11/01/2011
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CNHSS1
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| posted on 12/7/10 at 02:56 PM |
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scrapyard tyre of next profile up and then layup using the clingfilm method to get a 'clearance' inner profile. Then add filler or more
GRP to create the upper shape you require. Then take a mould from the top section, mould from underneath andmake a nice neat 2 part component, even
fill final item with expanding foam too for extra strength (dont use much or itll burst the final moulding!)
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
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Dale
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| posted on 12/7/10 at 10:03 PM |
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How about finding a tube for the next size up tire and doing a mold off of that. That would give you a nice round profile on the fender as well.
Dale
Thanks
Dale
my 14 and11 year old boys 22
and 19 now want to drive but have to be 25 before insurance will allow. Finally on the road
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iank
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| posted on 13/7/10 at 07:08 AM |
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Would be a bit heavy, but why not just cut up the next size up tyre and have rubber cyclewings.
I've seen it done before.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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