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#Post#: 2201--------------------------------------------------
Maserati 750 V8
DIR By: TheGiantTribble
Date: April 28, 2020, 6:00 am
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OK not exactly a build dairy, but a few details of how, why, and
maybes some pretty photos if I can get it to work!!!
Firstly why this particular car, well I personally like the more
aerodynamic shapes of the 1930's cars, and the challenge of the
more complex shapes...however this is not necessarily the
sensible option if you want a quick build.
Also it's a V8 in a see of straight 6's and 8's, it looks so
cool with a pair of pipes one down each side!
The first thing to decide was some dimensions, wheel base
decides all lot and is listed as a maximum of 66", mine is 63".
It should be noted the rules are very much spirit of, if you
choose an inspiration car that had a ridiculously long wheelbase
or engine compartment that's fine to go over the allowed, if
however you did it just to improve say straight line
stability...shame on you! IMHO the most important dimension is
the waist bulkhead, build it bigger height wise than you think
you can get away with, it so affects the ease with which you can
get in, and get out. It's worth mentioning, when calculating
dimensions, be prepared to fudge things a bit, well actually a
lot, base in mind the simple plan to shrink the car hits a
problem as soon as you cant shrink the driver, trust me I've
been trying to shrink myself for years! So to make some room I
removed the scuttle area this bought me several useful inch's
and so far no one has noticed.
The other thing to base in mind when scaling is take a thing
from model railways, the track can be a different scale to the
train, so in CK terms the height can be one scale, the length
another, capture the spirit and character is far more important
than scales acreate to 1/100000 of a mm.
Method of construction, the main structure is a plywood
monocoque or if that scale you a bit, a box, yup a simple box.
bulkheads of which there are 4 are 12mm plywood, the sides,
base, and top are 6mm ply. With some 16 x 38 PB where they join.
They were joined together with screws and Evostick waterproof
wood adhesive, good stuff that is.This is then wrapped in
fibreglass bonded with epoxy resin. Why you might ask epoxy as
it's dearer, well personally polyester resin causes me breathing
problems so really wasn't an option, and the designer in me
likes that's weight for weight Epoxy comes in a little bit
stronger. Please also note a small number of people can have
reactions to epoxy, so if your are doing this for the first time
whatever type of resin you are using do it outside in fresh air
and be prepared to back away in a hurry.
For the curves of the top of the front I cut what felt like
hundreds of stripes of 6mm ply approx. 7/8th running down to
5/8th...it would have been nice to have had access to a band saw
for this and with hindsight probably using flexi ply, or Rhys's
method of bending ply would have been significantly quicker.
The rather complex shape of the nose was created by first making
some thin plywood formers, IIRC about a dozen, these were hot
glue gunned to the front bulkhead, and the space between stuffed
with polystyrene, which was then attached with first a rasp and
the sand papered. Please not when working with polystyrene if
you have several layers do not glue them together as the glue
lines sand at a different rate to the polystyrene itself and
will not end up smooth. One other thing Epoxy is safe with
polystyrene, polyester attacks it.
So if you've got this far you have a lightweight box, that you
need to attached things to, so two lengths of 3 x 1 steel were
ordered and bolted to the box, where possible use threaded rod
so you can go across the whole of the CK, that way any shock
loads on one side are shared with the other reducing their
effect. Front suspension attached, engine mount at the back,
paint and you have your self a working CK.
Pictures to follow...
#Post#: 2205--------------------------------------------------
Re: Maserati 750 V8
DIR By: TheGiantTribble
Date: April 28, 2020, 6:58 am
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Unfortunately I seen to have a lack of build photos but have
some of the finished...they are never finished let’s be
honest...vehicle.
#Post#: 2211--------------------------------------------------
Re: Maserati 750 V8
DIR By: RhysN
Date: April 28, 2020, 2:00 pm
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Great posts, thanks Bill.
#Post#: 2225--------------------------------------------------
Re: Maserati 750 V8
DIR By: TheGiantTribble
Date: April 30, 2020, 5:51 am
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Thank you Rhys.
I have an article about the inspiration car, and some build
photos for you all...
#Post#: 2226--------------------------------------------------
Re: Maserati 750 V8
DIR By: TheGiantTribble
Date: April 30, 2020, 5:57 am
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And some more, including one showing the construction of the
original boot cover...boy was that ever a pain.
Hopefully I've capture the essence/character of the original,
mow if there was only some way to get that engine sounding like
a V8!
Any questions please don't hesitate :D
#Post#: 2229--------------------------------------------------
Re: Maserati 750 V8
DIR By: M.Z.Nahajski
Date: May 1, 2020, 3:45 am
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What a way to do it. That must have taken forever to do but the
finished product looks so good so the hard work paid off!
#Post#: 2234--------------------------------------------------
Re: Maserati 750 V8
DIR By: RhysN
Date: May 2, 2020, 2:21 am
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--- Quote from: Marek.Z.N link ---
>
> What a way to do it. That must have taken forever to do but
the finished product looks so good so the hard work paid off!
>
--- End Quote ---
Hi Marek, I'm curious as to your comment above. Can you please
expand, as I find, other than the tails, I can make these in not
much over a weekend, when sufficiently inspired.
#Post#: 2235--------------------------------------------------
Re: Maserati 750 V8
DIR By: M.Z.Nahajski
Date: May 2, 2020, 6:20 am
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using strips of wood to create compound curves in the tail is
very clever. this way of doing it looks almost like ribs of wood
and intercostal muscles of the other materials used. and the
amount of sanding necessary to clean that up all just sounds
like lot of effort but has been done expertly by Bill.
#Post#: 2236--------------------------------------------------
Re: Maserati 750 V8
DIR By: RhysN
Date: May 2, 2020, 10:02 am
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Have a look for "strip planking" in boat building methods Marek.
This one isn't GB but I think Stefan might allow. It's my friend
Dave in the US current build in lockdown. Maserati 250F. The
planks are balsa with isocyanate glue, then getting epoxy and
glass, probably as I am writing.
#Post#: 2237--------------------------------------------------
Re: Maserati 750 V8
DIR By: TheGiantTribble
Date: May 2, 2020, 12:53 pm
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The boot cover both mark 1 and 2 versions used
slates from a set of venation blinds, the two big differences
are
on the second one the slates where cut and trimmed much tighter
like boat
planking, and also the second one had a layer of thin wall
insulation
(the stuff designed to go under wallpaper) over the planking to
smooth things out a bit before fibre glassing.
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