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#Post#: 3380--------------------------------------------------
Re: Riley Special chassis
By: synthpunk Date: December 30, 2020, 4:09 pm
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French Curves!
I did the guitar making course at London Guildhall uni in the
90s, one of our regular classes was technical drawing and
instrument design. Once wed got taught the maths behind how and
why music and instruments work (fibonacci numbers, euler
spirals, french curves and the Golden Ratio) we were allowed to
go and design something. Wierdly, most of the guitars came out
looking like strats. Turns out Freddy Tavarres (the original
strat designer) was a big fan of french curves.... ;c)
I remain a fan of french curves to this day. Dont tell the
missus..... :D
#Post#: 3381--------------------------------------------------
Re: Riley Special chassis
By: Adrian Date: December 30, 2020, 4:14 pm
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Your secret is safe with me.(My wife was drawn using a
flexicurve). :)
#Post#: 3382--------------------------------------------------
Re: Riley Special chassis
By: synthpunk Date: December 30, 2020, 4:24 pm
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Hehehehe!!
/trying not to chortle suspiciously as Mrs S wanders past/
#Post#: 3383--------------------------------------------------
Re: Riley Special chassis
By: synthpunk Date: December 30, 2020, 4:46 pm
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Oh yeah- further design tweaking wot i forgot about-
Following on from another conversation with Rhys (cheers mister!
Much appreciate your time!) ive decided to forgo the GRP
cladding on this one, as the cuprinol should stop it rotting,
and a good yacht varnish should protect it. Im also thinking
about forgoing the whole unibody idea and basically building it
as a Modular design, more akin to a Stephenson kart. So instead
of the seat being glued to the sides and eventually turning the
whole car into one structure, im thinking of keeping the two
side rails removable (bolts) and building a whole actual tub
that incorporates the seat, scuttle, footwell etc.
Pros: if i mess it up, or break it, it will be much more
repairable. And modifiable. Hooray!
It might also then fit in my car in a dissassembled state, which
could be useful. Drive through the night to Stretton, arrive at
6am and then play with Meccano till its a car again, hopefully
by playtime.. ;c)
Cons: its going to require another sheet of plywood, thus making
it 1 sheet of plywood heavier.
It may also end up being a little bit less rigid. We shall see.
Im keeping all the patterns ive made for this one, i reckon i
could build a second identical one in a fraction of the time now
ive got the router patterns and drill guides made. Id quite like
to make a PDF when its all done that includes all the patterns
in printable format, just in case anyone else wants to build a
wooden, Riley 12 shaped cyclekart chassis using a router, a
drill and a jigsaw. When i do build another one i reckon ill go
for Marine grade ply rather than furniture ply (which will cost
more but then wont need Cuprinol), and also make the rails from
an 18mm centre with 6mm skins rather than all 6mm, just to save
on time and glueing. Its an awful lot of G-clamps!
#Post#: 3448--------------------------------------------------
Re: Riley Special chassis
By: synthpunk Date: January 13, 2021, 2:40 pm
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Been busy with various other things over the last week, but ive
done a bit more to the seat. Its now very much a bucket seat.
The cushion is suspended on foam blocks, and now seems plenty
bouncy, and the bucket sides do a fine job in firming everything
up so its now rock solid.
Its remarkably comfy- i sat in it for an hour last night whilst
watching a documentary on youtube, its actually more comfy than
my studio chair...
#Post#: 3453--------------------------------------------------
Re: Riley Special chassis
By: M.Z.Nahajski Date: January 14, 2021, 7:47 am
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very cool! i like it a lot and its definitely different
#Post#: 3456--------------------------------------------------
Re: Riley Special chassis
By: Adrian Date: January 14, 2021, 11:15 am
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I have an admittedly old but very cumfy studio chair for
sale?:>)
#Post#: 3468--------------------------------------------------
Re: Riley Special chassis
By: synthpunk Date: January 15, 2021, 4:57 pm
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Heheh- im not saying my studio chair isnt comfy; it cost a
fortune when it was new, made in west Germany... i found it in a
skip outside the old factory i used to live in ;) .... but this
seat really is quite comfy.
Ive invested 50 quid in an 8x4 sheet of 6mm marine ply for the
rest of the tub, rear end, floor and scuttle. Hopefully ill get
some time this weekend to get said parts cut out and dry
fitted..
The marine ply is nowhere near as pretty as the Baltic Birch
furniture ply that the rest of the bits are made from. Is also
noticeably heavier- it looks and smells like something pretend
mahogany like from the phillipines, but im not sure what species
it is yet. Its brown and hard, but its not teak or nyatoh.
/edit- i think its Meranti ply. Or maybe lauan but im veering
towards meranti because its heavier than expected, quite coarse,
and seems within range for colour, and also the smell... I
wouldnt want to use it for a guitar but i reckon itll do for the
tub.
#Post#: 3470--------------------------------------------------
Re: Riley Special chassis
By: RhysN Date: January 16, 2021, 3:33 am
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Meranti is my favourite for boat building :)
#Post#: 3488--------------------------------------------------
Re: Riley Special chassis
By: synthpunk Date: January 17, 2021, 12:07 pm
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Quick update photo- ive been storing all the bits in my studio
for the last couple months, which has been a bit inconvenient at
times. Ive now cleared/rearranged the garage so theres enough
room to fit the kart in and still get to the workshop at the
back. I found a quite nice sackbarrow/trolley being thrown away
on the industrial estate my work is on last week- some work on
the tyres and axle had it fixed up so its now a fairly perfectly
sized dolly for moving the kart about on in its currently
wheel-less state. Hurrah!
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