Mercedes 300SL Gullwing 1/24 Tamiya with photoetched detail up set from Hobby Design

[silver911]

Now they would look nice in 1/12 for my engine 🤔🙃

 

Seriously mate...stunning attention to detail as always...love it.

[CrazyCrank]

On 9/28/2020 at 10:07 AM, silver911 said:

Now they would look nice in 1/12 for my engine 🤔🙃

 

 

This kind of case could be managed easily 😉

 

Well, good evening Gentlemen

 

I've finally 3D printed 9 wedging candles for the chassis, and 4 of them appeared to be bad printed and unserviceable, so a new 3T printing is ongoing at the moment.

 

  

 

  

 

  

 

 

I can't go on today with the chassis painting job because, inexplicably, the primer coats are not totally dry, and remain slightly sticky when handling, so, I'm supposed to wait still a few days.

 

Consequently , it's time to continue this build with the engine....

 

A fairy tale, indeed: once upon a time, it was a scale models brand, Tamiya, which supplied pretty but inaccurate parts in their kits

 

Seriously, some parts supplied by Tamiya to build the engine are totally inaccurate, for instance the injection pump or the ignition cable assembly.

I've so decided to try to "scratch" them with Fusion 360

Stay tuned for next steps

 

 

[CrazyCrank]

Good evening guys

 

3 coats of Tamiya X18 semi-gloss black have been sprayed on the tubular chassis.

I have now to wait a few days for the complete drying before spraying gloss clear coats, in order to give it the right color (according to Tamiya recommendations ) and to protect it. during  future handlings

 

That's where I am at the moment:

 

 

  

 

I've also slightly modified the engine valves cover, on the left side, and the oil tank, in order to allow further enhancements, such as fabrication of the oil circuit between the engine, the oil tank, and the oil cooler, taking inspiration of this exploded view:

 

 

At least, having found a lot of photos of the genuine injection pump, I'm now able to design it with Fusion 360 with more accuracy:

 

  

 

  

 

  

 

   

 

  

 

  

 

I fight daily with this software to make it obey, and only make slow progress, but I manage to get things right, and have actually reached that point:

 

 

 

  

 

  

 

  

 

 

All that stuff took me about ten hours , but I think it was worth it...

 

That all for now, Folks

Thanks for watching...

 

[Mr Mansfield]

Such an eye for detail! I’d just stick with pretty but inaccurate 

 

interested to see how this comes out. What did the Tamiya injection pump look like?

[CrazyCrank]

7 minutes ago, Mr Mansfield said:

Such an eye for detail! I’d just stick with pretty but inaccurate 

 

interested to see how this comes out. What did the Tamiya injection pump look like?

Thanks for your kind comment, @Mr Mansfield 

 

Here is the Tamiya part, recto and verso. It includes the towing arm (on the left on the outside view) and the front part of the injection pump that I've not yet drawn:

 

Inside view:

 

 

Outside view:

 

 

And at the moment, I'm here:

 

 

   

 

 

 

  

 

Obviously, all that stufff, once 3D printed in real size of 1:24 scale, will be very small, and all the details you can see on the drawings won't be visible, for the major part of them.

But, if I feel like printing this at 1:8 scale, for instance to build a MB300 SL engine's replica, all the work done has been useful

 

 

 

[Pouln]

Does look very good, Thierry. 
Scaling it up or down is a nice consequence of this 3D stuff, isn’t it?

[Hamden]

 

Your attention to detail is second to none

 

  Stay safe        Roger

[CrazyCrank]

Thanks guys for your kind compliments

 

[harveyb258]

14 hours ago, CrazyCrank said:

But, if I feel like printing this at 1:8 scale, for instance to build a MB300 SL engine's replica, all the work done has been useful

 

Excellent work Thierry, you're getting the hang of this 3d stuff, aren't you?

 

Why stop at 1:8, you could do it 1:1... it would make an excellent display piece in its own right.

[silver911]

On 10/6/2020 at 10:12 PM, CrazyCrank said:

Thanks for your kind comment, @Mr Mansfield 

 

Here is the Tamiya part, recto and verso. It includes the towing arm (on the left on the outside view) and the front part of the injection pump that I've not yet drawn:

 

Inside view:

 

 

Outside view:

 

 

And at the moment, I'm here:

 

 

   

 

 

 

  

 

Obviously, all that stufff, once 3D printed in real size of 1:24 scale, will be very small, and all the details you can see on the drawings won't be visible, for the major part of them.

But, if I feel like printing this at 1:8 scale, for instance to build a MB300 SL engine's replica, all the work done has been useful

 

 

 

If your thinking of a 1:8 engine print...please let me know Thierry...as Mr C is desperate for me to do something in that scale 😇

 

Seriously good work though mate

 

Ron

[CrazyCrank]

Good evening Gentlemen

 

Well, I think my Injection pump's drawing is now finished, apart from the bearing pedestal, which is already included on the engine block supplied by Tamiya, and from the towing arm, that I've to turn on the lathe.

 

I really don't know where we are going with the 3D printing, because the majority of details are often less than 0.1 mm thick at 1:24 scale, and so the printer could fail.

But for the fun, and because of the enormous amount of efforts I've done to make this drawing, I'll print it, and we will see.

I'll print it also at 1:12 and 1:8 scale to see how it comes out.

 

That said, anticipating a potential disaster with the printer, I've  primed and painted the part supplied by Tamiya to represent the injection pump, and of course, although it's inaccurate, it's not that bad !

 

Hereunder some pictures of the injection pump, after Fusion 3D rendering :

 

The 4 view drawings :

 

 

Rear and front views:

 

  

 

Inside and outside views:

 

  

 

Top and bottom views

 

  

 

Three-quarter inside and outside views

 

  

 

Close view on the pipe connections for pressure valve holders:

 

 

Wire frame views, with and without hidden edges

 

  

 

Despite some difficulties, I begin to tame Fusion 360

 

The amount of sketches is 109

 

 

The amount of plans and axis is 107

 

 

And 83 bodies and components. !

 

 A cat wouldn't be able to sort out her own kittens !

 

One the STL file generated and imported in Chitubox, we have this:

 

  [

 

And 1:24 plus 1:12 scales together:

 

 

Stay tuned for the next step: result of 8 hours 3D printing

+

[ejboyd5]

How much time might be involved in a 1:1 scale printing.  I can envision a reasonable market among fans of the 300 SL.

[CrazyCrank]

1 minute ago, ejboyd5 said:

How much time might be involved in a 1:1 scale printing.  I can envision a reasonable market among fans of the 300 SL.

Wow, coming from you, a specialist of this mythic car, I'm touched by this huge compliment, thanks so much

 

[silver911]

Oooooh....1/12.....very nice

 

Great job mate.

 

Ron

[nick]

1 hour ago, CrazyCrank said:

Good evening Gentlemen

 

Well, I think my Injection pump's drawing is now finished, apart from the bearing pedestal, which is already included on the engine block supplied by Tamiya, and from the towing arm, that I've to turn on the lathe.

 

I really don't know where we are going with the 3D printing, because the majority of details are often less than 0.1 mm thick at 1:24 scale, and so the printer could fail.

But for the fun, and because of the enormous amount of efforts I've done to make this drawing, I'll print it, and we will see.

I'll print it also at 1:12 and 1:8 scale to see how it comes out.

 

That said, anticipating a potential disaster with the printer, I've  primed and painted the part supplied by Tamiya to represent the injection pump, and of course, although it's inaccurate, it's not that bad !

 

Hereunder some pictures of the injection pump, after Fusion 3D rendering :

 

The 4 view drawings :

 

 

Rear and front views:

 

  

 

Inside and outside views:

 

  

 

Top and bottom views

 

  

 

Three-quarter inside and outside views

 

  

 

Close view on the pipe connections for pressure valve holders:

 

 

Wire frame views, with and without hidden edges

 

  

 

Despite some difficulties, I begin to tame Fusion 360

 

The amount of sketches is 109

 

 

The amount of plans and axis is 107

 

 

And 83 bodies and components. !

 

 A cat wouldn't be able to sort out her own kittens !

 

One the STL file generated and imported in Chitubox, we have this:

 

  [

 

And 1:24 plus 1:12 scales together:

 

 

Stay tuned for the next step: result of 8 hours 3D printing

+

Looking really good. Too late now but I would have cloned the small version 3 or 4 times in chitubox. There’s no time penalty, the material cost is pennies and for detail that fine you’ve got a few chances of getting a good one, there’s really no downside. 
 

good luck. 
 

Nick

[CrazyCrank]

Morning chaps

 

Here is the result of 9 hours D printing. Not so bad at 1/24 and 1/12

 

At 1/24 scale:

 

  

 

At 1:12 scale:

 

  

 

The majority of thinnest details disappeared at  1:24, and the 6 pipes for fuel lines are unequal and of course too thin for being able to host fuel lines

So, I've decided to simplify the drawing for 1/24 scale, and to replace the 6 pins by 6 holes 0.4 mm, in order to be able to make the piping with very thin insulated wire.

 

Thanks for watching

 

[harveyb258]

1 hour ago, CrazyCrank said:

The majority of thinnest details disappeared at  1:24

That is a real shame after all the drawing hours, Thierry.

 

1 hour ago, CrazyCrank said:

So, I've decided to simplify the drawing for 1/24 scale, and to replace the 6 pins by 6 holes 0.4 mm

Sounds like a good plan. I'm sure you will find the perfect solution....

 

[CrazyCrank]

Evening guys

 

Hereunder the result of the new drawing, waiting the 3D printed parts to cure:

 

 

 

The parts look good:

 

.   

 

[/url   [url=https://flic.kr/p/2jSc6m4]

 

 

And after a coat of primer, test fit on the engine block:

 

  

 

  

 

Much better than the kit part, isn't it ?

 

  

 

Next step: attempt to scratch the 6 fuel lines that come out of the top of the injection pump, after the painting job of the part

 

Stay tuned I f you like

 

[CrazyCrank]

Wood afternoon guys

 

While the second gloss clear coat on the tubular chassis was drying, I've achieved the fabrication of the injection pump and of the fuel lines

 

The resin towing arm wasn't very accurate and refused to stay straight, bending itself as a bow, so I cut it off and replaced it with brass tubes:

- 1 tube 0.8 mm diameter and 13 mm long for the larger section

- and 2 tubes 1.2 mm diameter and 2 mm long for the two ends

-  the whole set glued with tiny droplets of CA gel and threaded on the pump body.

 

To simulate the 6 fuel lines, I used:

- 0.2 mm diameter copper wire (that gives  approx. 5 mm at 1:1 scale, so probably a bit too thin)

- 0.3 mm outer diameter (and 0.2 inner) insulated wire from ZERO Designs

 

 

 

I stripped out the metal wire from this one over 20 mm length and cut 2 dozens of 1.5 mm sections of the plastic tube (2 dozens because I needed 2 sections per few line and I knew that much of those tiny tubes would run away from y bench  )

Then I threaded 2 sections of plastic tubes on each of 6 copper wires and I got this stuff.

 

  

 

It required then a lot of patience in order to glue the 6 duke lines on the top of the pump body, glue the pump in place on the engine body, and then to bend correctly the fuel lines and to thread the 6 ends into the 6 holes I had drilled previously at the right place

 

  

 

  

 

But it was worth the efforts :

 

  

 

If I want to be closer of the real, it remains some piping to add on the injection pump, but that's another story...I've to sleep on it 🙄

 

Next step, add the distributor and its wiring ans spark plugs, another challenge 😉

 

Stay tuned if you like

 

[CrazyCrank]

Good evening  morning Gentlemen

 

The injection pump has been a bit weathered, as the engine body, with Tamiya Black Panel Line Accent Color.

One should remain slight with the accentuation because actual owner of this kind of very expansive vehicle pamper lovingly their car....hum, I hope...in any case, if I owned one, that would happen !

 

 

I've sprayed 2 coats on the tubular chassis, having before taken the precaution to remove the black paint on the oil tank cap, in order to make the brass color apparent

And I've assembled the rear axle .

And painted all my workshop candles.

 

Hereunder some close pictures of the rear axle :

 

 

 

  

 

Another of the oil tank

 

 

And others of the chassis put on candles:

 

  

 

  

 

Sans titre by Thierry Decorniquet, sur Flickr

 

That's all for now.

 

All the parts needed to assemble the front axle have been cleaned and primed and are drying before their semi-gloss black coat.

 

Stay tuned for next steps, and thanks for watching

 

[Pouln]

The chassis is looking great, Thierry. ( and so do the stands)

[Hamden]

 

Your injection pump and chassis look stunning as do your axle stands!

 

   Stay safe        Roger

[CrazyCrank]

Afternoon, chaps 😎

 

All parts of the front axle and of the exhaust system have been painted and are drying.

 

I've also painted the 3 batteries I'd made, and I'm frankly stunned by the details level you get with a resin 3D printer !

 

What's the battery's manufacturer ? (do not guess ! try to read on the picture below)

 

  

 

The battery won't be visible, but I'm happy with the result, comparing it with the "genuine" parts:

 

 

Have a nice evening

 

 

 

 

[CrazyCrank]

Good evening guys

 

Battery painting job finished and this major part of the car has been put in place:

 

  

 

Tonight, I have begun to work on the set of ignition wires, this part :

 

 

In reality, if we look at the reference photos on Mercedes Benz website, we see that:

 

 

So we can see that the plug wires come in a kind of "flute", and are distributed toward the engine via 6 holes onto it.

We can also see that this "flute" is flat and not rounded.

 

The kit part provided by Tamiya is this stuff, not bad at all for its shape, but absolutely unusable if one want to simulate the correct wiring between the distributor and the spark plugs.

 

 

So, having slept on it several nights, I've found that solution:

 

- 1. Take a. 1.3 mm brass tube, cut 20.5 mm length, clean it

- 2. Place it  between the jaws of you vise on the milling machine

- 3. mesure precisely on the engine where are placed the spark plugs and drill six 0.5 mm holes at the right location on the tube.

 

 

- 4. Flatten the drilled tube between your vice jaws, carefully

- 5. You've got the beginning of an acceptable flute, rather flat, 1.45 mm width (as the kit part), and 1 mm thick (as the kit part)

 

 

- 6. Spin the flute 90° between the vice jaws and with a 0.8 mm drill bit, drill 4 "oval" shaped holes (drilling two 0.8mm holes  0.3 mm apart ) 

 

- 7. Your work will result in this:

 

 

- 8. Take a 0.56x0.56  mm squared styrene rod, 10 mm long and glue it with CA gel on the bottom flatten face of the flute, and you've got the right stuff:

 

 

(You can see that drilling a 0.8 mm hole, I've drill too deeply ! )

 

- 9. And when I did a set fit on the engine block, I saw that:

 

 

When I glue this part on the engine block, it will be easy to place it correctly in order to obtain a good orientation.

 

Well, chaps, a lot of work remain to do on this:

 

- Prime and paint (Steel I think) the flute (Easy)

- Fabricate 6 wired spark plugs and glue the wires into the flute holes (easy)

- And the hardest, fabricate 6 wires coming out the front end of the flute, and glue them onto the distributor

- At least glue the wired distributor and the flute  in place without ruining the whole set, and then glue the spark plugs on the engine

 

I've made enough tonight, it's time to take my dinner 🙄

 

Stay tuned for next steps

 

 

 

[CrazyCrank]

Good evening gentlemen

 

A little progress tonight ...

 

I've finished to assemble the front axle:

 

  

 

And overall, I've made the six spark plugs wires, glued them on the engine block, glued the flute over the camshaft cover, and threaded the 6 spark plus wired into the 6 holes of the flute, without glue, in order to get a very clean aspect.

 

And frankly, I'm pretty proud of the result:

 

   

 

It remains to fabricate the 7 wires set that goes from the flute, to the distributor, and the wire that goes from the end off the flute toward the ignition coil 

 

Stay tuned if you like