Author Topic: Whiffs found surfing  (Read 300309 times)

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Offline Scotaidh

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Re: Whiffs found surfing
« Reply #2055 on: July 07, 2019, 07:11:27 am »
The very first car model I ever built was scratched from a box o' parts given to me by a college room-mate.  I used semi (HGV) duallies at the rear and slingshot dragster wheels at the front.
The chassis was made of sprue, IIRC - that was in 1977, ye ken, so my memory's a bit fuzzy on the details.

My tools consisted of a pocket knife and a tube of tangerine-scented glue ...

My point being that any car/truck parts can pretty much be used with any other car/truck parts.  We see this in the real world, too - the monster truck Bearclaw is a pickup truck attached to the top of an M5 Stuart chassis .
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Offline TheChronicOne

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Re: Whiffs found surfing
« Reply #2056 on: July 07, 2019, 10:01:04 am »
What was/is up with that citrus-ey smell anyway?  Nothing brings on nostalgia of childhood like the smell of Testors tube glue and enamels...
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Offline ChernayaAkula

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Re: Whiffs found surfing
« Reply #2057 on: July 07, 2019, 06:27:09 pm »
<...>
A 27-litre Merlin in 1/72nd scale scaleoramas out to 13.125 litres in 1/35th scale. <...>

Does it work that way with volumes?  :-\ Okay, 1/72 is roughly half of 1/35. So, wouldn't a single "1/35 litre" have space for eight "1/72 litres"? Twice as long, but also twice as wide and twice as high? Wouldn't a 1/72 Merlin then have a displacement of just 27/8= 3.375 litres when used on a 1/35 build?
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Actually just 3.101 litres (when figuring actual 35/72=0.486 and not for simplicity's sake 35/72=0.5).
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Offline Old Wombat

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Re: Whiffs found surfing
« Reply #2058 on: July 07, 2019, 08:36:17 pm »
Displacement is a cubed-variable - &, "No!", I'm not going to try & work it out - ChernayaAkula's on the money.
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Offline Scotaidh

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Re: Whiffs found surfing
« Reply #2059 on: July 08, 2019, 01:21:42 am »
What was/is up with that citrus-ey smell anyway?  Nothing brings on nostalgia of childhood like the smell of Testors tube glue and enamels...

The citrus scent did two things.  It indicated that there was no toluene in the glue (which is why, as a glue, it sucked ditch-water sideways), and it was an attempt to soothe non-modelers with a "non-chemically (nasty) smell" to increase popular (ie, non-modeler) tolerance for modeling and thus increase their customer base.  Not really a bad idea - if only the glue had actually worked.

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Offline Weaver

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Re: Whiffs found surfing
« Reply #2060 on: July 08, 2019, 02:40:49 am »
<...>
A 27-litre Merlin in 1/72nd scale scaleoramas out to 13.125 litres in 1/35th scale. <...>

Does it work that way with volumes?  :-\ Okay, 1/72 is roughly half of 1/35. So, wouldn't a single "1/35 litre" have space for eight "1/72 litres"? Twice as long, but also twice as wide and twice as high? Wouldn't a 1/72 Merlin then have a displacement of just 27/8= 3.375 litres when used on a 1/35 build?
.
Actually just 3.101 litres (when figuring actual 35/72=0.486 and not for simplicity's sake 35/72=0.5).
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Doh! Yes, you're right of course... :banghead: :banghead: :banghead:

I suspect it's more complicated than that, because we're dealing with the volume of cylinders. The piston stroke is a straight dimension which scales linearly, but the bore of the piston has to be converted into an area to get the volume and that makes it a square function. I've run a few examples where I've taken cylinders of the same volume but different proportions, scaled them linearly, and worked out the new volume, and it comes out different. The conversion factor between the volumes comes out as anything from x 8.5 to x 8.75.

Having said that, that isn't a big range of conversion factors when you consider that engines can be bored out in the original block without changing their outward appearance. And all of this is, of course, good news for Zenrat, since it means he can use a much wider range of sub-scale aircraft engines (including 1/48th) to make 1/35th hotrods.  :thumbsup:

Conversion factor for 1/48th to 1/35th = 2.58

« Last Edit: July 08, 2019, 02:48:17 am by Weaver »
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Offline kitnut617

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Re: Whiffs found surfing
« Reply #2061 on: July 08, 2019, 07:07:25 am »
Benelli make a 1 litre V-8 engine for one of their motorcycles, why not a 3 litre V-12
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Offline PR19_Kit

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Re: Whiffs found surfing
« Reply #2062 on: July 08, 2019, 10:09:04 am »

The citrus scent did two things.  It indicated that there was no toluene in the glue (which is why, as a glue, it sucked ditch-water sideways), and it was an attempt to soothe non-modelers with a "non-chemically (nasty) smell" to increase popular (ie, non-modeler) tolerance for modeling and thus increase their customer base.  Not really a bad idea - if only the glue had actually worked.


There's a styrene glue about now that smells of citrus too, it's called 'Limon-something or other' and it's meant to be wholly natural in content. I've got some (but can't find it to get the correct name  :banghead:) and I use it mainly for gluing paper and card onto styrene, not sure how well it works with styrene-styrene joints though.
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Online zenrat

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Re: Whiffs found surfing
« Reply #2063 on: July 09, 2019, 04:35:50 am »
<...>
A 27-litre Merlin in 1/72nd scale scaleoramas out to 13.125 litres in 1/35th scale. <...>

Does it work that way with volumes?  :-\ Okay, 1/72 is roughly half of 1/35. So, wouldn't a single "1/35 litre" have space for eight "1/72 litres"? Twice as long, but also twice as wide and twice as high? Wouldn't a 1/72 Merlin then have a displacement of just 27/8= 3.375 litres when used on a 1/35 build?
.
Actually just 3.101 litres (when figuring actual 35/72=0.486 and not for simplicity's sake 35/72=0.5).
.
.
.
.
.
.
.


Doh! Yes, you're right of course... :banghead: :banghead: :banghead:

I suspect it's more complicated than that, because we're dealing with the volume of cylinders. The piston stroke is a straight dimension which scales linearly, but the bore of the piston has to be converted into an area to get the volume and that makes it a square function. I've run a few examples where I've taken cylinders of the same volume but different proportions, scaled them linearly, and worked out the new volume, and it comes out different. The conversion factor between the volumes comes out as anything from x 8.5 to x 8.75.

Having said that, that isn't a big range of conversion factors when you consider that engines can be bored out in the original block without changing their outward appearance. And all of this is, of course, good news for Zenrat, since it means he can use a much wider range of sub-scale aircraft engines (including 1/48th) to make 1/35th hotrods.  :thumbsup:

Conversion factor for 1/48th to 1/35th = 2.58



One of the tricks I use when I can't get off to sleep is to try to calculate this sort of thing in my head.

If I was hot rodding 1/35 vehicles i'd use the smaller 1/25 V8 engines, wheels and tyres.  They might be a bit on the large size but that would give a suitable cartoony look.
Speaking of which, Speedy here has 1/24 rear wheels and 1/32 front wheels - both Hawker Typhoon.
Speed Buggy 5 by Fred Maillardet, on Flickr
Fred

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

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Offline Scotaidh

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Re: Whiffs found surfing
« Reply #2064 on: July 09, 2019, 07:55:47 am »
<...>
A 27-litre Merlin in 1/72nd scale scaleoramas out to 13.125 litres in 1/35th scale. <...>
snip

One of the tricks I use when I can't get off to sleep is to try to calculate this sort of thing in my head.

If I was hot rodding 1/35 vehicles i'd use the smaller 1/25 V8 engines, wheels and tyres.  They might be a bit on the large size but that would give a suitable cartoony look.
Speaking of which, Speedy here has 1/24 rear wheels and 1/32 front wheels - both Hawker Typhoon.
Speed Buggy 5 by Fred Maillardet, on Flickr

Brilliant!   :thumbsup:
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Offline joncarrfarrelly

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Re: Whiffs found surfing
« Reply #2065 on: July 10, 2019, 05:00:59 pm »
Benelli make a 1 litre V-8 engine for one of their motorcycles, why not a 3 litre V-12

Ferrari made V-12s ranging from 1.5 to 5 litres. 3 litre V-12s were not uncommon.

BRM made a 1.5L V-16 and a 3L H-16.
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Offline joncarrfarrelly

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Re: Whiffs found surfing
« Reply #2066 on: July 10, 2019, 06:46:19 pm »
Going the other way from the 1/25th to 1/35th, the 136 in3 Ford V-8/60 flathead that comes in
one of the versions of the Revell Kurtis Midget racer kit scales roughly to a 373 in3/6.2L engine.

The engine measures about 1.5” from the front to the end of the gearbox, and the oil pan is about the
same length as the one moulded to the frame of the Bronco Kfz. 13 kit, which I bought some time back
with hot-rodding in mind.
 ;D

https://web.ipmsusa3.org/content/kurtis-midget-racer-edelbrock-equipped-v-860-trailer



http://www.armorama.com/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id=4724



A good series of articles on the little flathead:
http://www.curbsideclassic.com/automotive-histories/automotive-history-the-small-flathead-v8-part-one-the-pre-war-years/
http://www.curbsideclassic.com/automotive-histories/automotive-history-the-small-flathead-v8-v8-60-part-deux-the-post-war-fords/
http://www.curbsideclassic.com/curbside-classics-european/automotive-history-the-small-ford-flathead-v8-v8-60-part-three-the-simca-years/

 :thumbsup:
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Must leave successors more corrupted still."
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Offline Snowtrooper

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Re: Whiffs found surfing
« Reply #2067 on: July 10, 2019, 11:58:00 pm »
Regarding small V-8/V-12 engines, back when I was a kid, a local car magazine had an article how some local gearhead had modified a VW Beetle with a selfmade V-8 made from two Škoda 120 inline-4 cylinder blocks. Amazingly, the article claimed the contraption even worked and moved rather swiftly (apparently the builder had tuned the engine to produce more HP than two stock engines would have; can't remember if there was a blower or turbo and/or had he raised the compression ratio and/or lenghtened the stroke).

Offline Weaver

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Re: Whiffs found surfing
« Reply #2068 on: July 11, 2019, 01:52:56 am »
You could always be really ambitious and give it a working V-8....

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Offline joncarrfarrelly

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Re: Whiffs found surfing
« Reply #2069 on: July 11, 2019, 12:06:33 pm »
Just for giggles I did the scale-o-rama numbers for the 98in3 Offy Midget twin-cam
four-cylinder engine in the other version of the Revell kit.
It comes out at around 295in3/4.8L. :wacko:

Here’s a displacement calculator tool:
http://www.csgnetwork.com/cubicinchcalc.html

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And we, till now unmatched in ill,
Must leave successors more corrupted still."
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