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Scale 4x2 and Buggy R/C vehicles This is the place to put your Sand Scorchers, Bajas and other various 2wd offroad R/C's


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  #31  
Old 06-04-2016, 12:20 PM
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Default Junkyard Stance Sand Scorcher, Negative Camber angle,,,

Here's a slight aside - there's been no "Junkyard" in this thread at all yet ! -

I promise will will get to the junkyard, in due course,

But for now, at least a little "Stance"

A little negative camber angle on the fronts, admit it, it just looks cool:

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I tested out my plan by fitting some washers in between the front lower arm and the "front axle" ( as Tamiya calls it )

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And decided with a longer lower arm shaft, I could play around with a negative camber angle

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The cast part has a similar flat side to tighten the grub screw against

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and allowed some quite extreme camber angles, when I tried out different spacers, here - two 4mm bearings ( this was very extreme )

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In the end, I went for a cast 5mm spacer

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One for each side:

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Here's the part going into the front assembly ( with a little grease )

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And with the lower arm attached

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And back on the chassis - the cast material is not a great match for the stock metal, so I may further tweak this going forward

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  #32  
Old 06-05-2016, 07:36 AM
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Default Junkyard Stance Sand Scorcher, inner wheel arches, and side panniers

Well come back to the front camber angle, as I experiment with it throughout the build.

But next, I've never been keen on the way you can see all the internals through the empty wheel arches on Tamiya's Sand Scorcher, so I decided to add the challenge of printing some inner wheel arches to my parts list

Firstly a pair of side panniers, both to look cool, and give me two of the three fixing points I need for the intended rear inner arches.

Here's my design

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And where they should fit on the Scorcher

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Here's the test pair printed out

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And fit to the work-in-progress body shell

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  #33  
Old 06-05-2016, 07:48 AM
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Default Junkyard Stance Sand Scorcher, nerf bars

Flipping round to the front of the Scorcher, I wanted to design a cast metal part to protect from front impacts - I do intended this be be a driver and not shelf queen - there is the stock item, or third party box-art style cage bumpers.

I was after something a little different -

How about a off-road take on the classic nerf bars style, you used to see fitted to a lot of Bugs ?

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I decided to use all six holes on the underside for extra strenght

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Here's the test nylon part, in primer, on the build

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I was happy, bring on the cast alloy version, this time with a nickel plated finish - which is about the shiniest Shapeways do

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  #34  
Old 06-05-2016, 08:01 AM
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Default Junkyard Stance Sand Scorcher, inner wheel arches, and side panniers

Back to those inner wheel arches, and although I liked my side panniers - they are going to act as fixing points for the rear inner arches - I wanted to push the idea a bit further

Add in a Jerry can on one side:

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And a couple of Nitrous canisters on the other

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and that's more like it !

With the plans I have for the engine for this build - these are both essential items !

Here's the test prints:

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They look a whole lot better in primer ( and way easier to photograph )

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And on the Scorcher

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  #35  
Old 06-05-2016, 08:06 AM
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Wow....! Is there a Shapeways located in the UK? I know that you are now putting together this thread , but it must have taken a while to order and receive those parts.....
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  #36  
Old 06-05-2016, 08:14 AM
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Wow....! Is there a Shapeways located in the UK? I know that you are now putting together this thread , but it must have taken a while to order and receive those parts.....
Hi Trini2DBone, thanks for checking back !

There is a Shapeways in the Netherlands that ships to the UK (no import duty, unlike from the US) - Parts do take a week or so from uploading to receiving

This build has been going on a while now, and although it's certainly not finished - they are still quite a few steps to show before it has caught up to where it is.

I was unsure how the whole process would go, but I decided to to photograph everything from the beginning regardless - unlike other projects - which I am pleased about now as this is looking like the first build that I will actually finish !





Plenty more to come,,,

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  #37  
Old 06-05-2016, 08:50 AM
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This is turning out really nice! Might be interested in parts!
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  #38  
Old 06-05-2016, 09:21 AM
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Default Junkyard Stance Sand Scorcher, inner wheel arches, and side panniers

So, on to the inner arches, firstly the rears,,

These took a lot of tweaking - the more contact points a design has with the curved surface of the sand scorcher, the trickier it is - and really tested the accuracy of the 3D model I was continually developing

My plans were reasonably ambitious - A five part assembly that that included both inner rear arches, the side panniers, and a rear shelf that would be visible through the rear window

Here are the parts

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and how they should fit together into the assembly

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The fronts are somewhat simpler - just a part for each side

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Here's a profile on the 3D Scorcher

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This was about the third print of the rear assembly

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Which finally fitted quite well, just some minor gaps, and the slot for the shock needed pushing backwards a touch

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With the rear wheel in place, it certainly gave the effect I was after

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The design was tweaked, and here are the revised parts, in the black nylon this time - i guess it saves on primer for a part you're going to paint dark anyway !

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To join the shelf to the wheel arches, I used four M2.5 12mm cap heads

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Here's the final assembly, ready to go in,, you can see the two m.16 screws ready to fix into the holes in the cage of the panniers

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  #39  
Old 06-05-2016, 09:42 AM
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Default Junkyard Stance Sand Scorcher, inner wheel arches, and side panniers

The inner rear aches have pilot holes to drill through, once I had it held tight to the Scorcher - the nylon material is quite flexible, so it was possible to flex it into a really tight fit on the body, while marking holes.

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Here are the front two fixing holes for the rear arches - these line up with the panniers, and the whole lot screws together

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From the inside

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I couldn't work out another way of securing the rear of the inner arch, so as I'm not a fan of gluing anything on car you plan to drive reasonably hard, a discrete screw through the body work was the only solution.

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From above, the shelf looks cool, and the screw is barely noticeable - particularly once this Scorcher has been to the Junkyard !

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The front inner arches do clear the top of the stock front suspension, but in case I modify the front set up later ( no plans just yet ) I've left a substantial hole in the top of the printed part, should extra clearance be needed later.

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The inner front arches fix on at the front using the hole where the nose cap attaches to the main body shell - I've used an M2 8mm cap head

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The rear fixing point for the front arch, again, is a drill-through-the-bodyshell affair,

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But the m1.6 cap head does tuck in behind the hinge of the door, so it's not too obvious

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Here's view of the final fit

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  #40  
Old 06-05-2016, 09:47 AM
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Quote:
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This is turning out really nice! Might be interested in parts!
Thanks lilsami87 !!

Happy to answer any questions you might have
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  #41  
Old 06-05-2016, 10:28 AM
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Default Junkyard Stance Sand Scorcher, the electronics box

So i reckon, anyone who's had the patience to read this far, wading through the excitement of inner wheel arches, deserves a little treat.

I never been a fan of seeing all the untidy cables and suchlike in the clear plastic "water proof" (80's style) electronics box

Here's my solution,

Firstly, I painted the recessed Tamiya stars in the lid with black gloss acrylic - firstly with a tiny brush - then pushing the paint into the corners with a needle - Some very light sanding with some p800 was needed to clean up the mess

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The I masked off the entire outside of all three parts that make up the box

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Spray the inside with about eight coats of lime green gloss, waited a week to dry ( it was winter ), and the here you are

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Reassembled

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My nod to Tamiya

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And refitted to the chassis

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I got to admit - I'm still loving the negative front camber, and the nerf bars !

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  #42  
Old 06-05-2016, 11:13 AM
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I gotta admit, I don't like the camber at all. I do like everything else you've done though. I'm most looking forward to the weathering process, that's my favorite part of any build.
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  #43  
Old 06-05-2016, 11:22 AM
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Default Junkyard Stance Sand Scorcher, sit back, take stock

It's that time again to sit back and take stock of progress,

From the front, this build is going in the right direction, the Junkyard Stance Scorcher is looking mean and ready for the junkyard treatment

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But from the rear it's a sorry state, there's an ill fitting louvered sun shade, and other than that. it's just a bit, bare

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But wait, there is hope ! What's that I see,, a wider, lower rear cage

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Here's my designs for a revised rear cage - one with enough space for an engine appropriate for the build -

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  #44  
Old 06-05-2016, 11:26 AM
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Quote:
Originally Posted by DougJ View Post
I gotta admit, I don't like the camber at all. I do like everything else you've done though. I'm most looking forward to the weathering process, that's my favorite part of any build.
Hi DougJ, thanks for showing interest ! , I guess it's "each to their own" in matter of camber, or perhaps "camber is as camber does",,

Plenty of weathering coming up, watch this space !
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  #45  
Old 06-05-2016, 11:56 AM
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Default Junkyard Stance Sand Scorcher, Engine build, The plans

So, we are finally here - after a weekend of cropping and typing !

In many ways the story of this build, is really the story of this engine build

Ever asked yourself the question - what's the ultimate engine you could squeeze into the back of a Sand scorcher, or indeed any VW Beetle ?

The natural evolution of the flat four air-cooled unit designed by Ferdinand and friends has to be the the air-cooled flat six that became the 911 workhorse for decades. When I discovered that they are crazy dudes who have slotted a flat six Porsche unit into beetles in the real 1:1 world, that was it - I became obsessed

Folks, I offer you my plans for my Junkyard Stance engine:

A Porsche flat six, air-cooled, twin turbo boxer beauty:

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