[WIP] Bentley Turbo R LWB

[Michael217]

23 minutes ago, MP LEGO Technic creations said:

...the other side of the car still has it.

I looked at the view from below, the threshold looks quite good, it can be completed to the wheel, as on the original car, yes there will be one plate missing in length (I assume) but at the corner of the arch it will not be conspicuous)

[Seasider]

@Michael217 shows what I was talking about with the front axle and a-post

Also it took me a while to work out what the conversation about “threshold” was about. I’ve worked it out, you’re talking about the “Sill”. Yes this is a crucial design element. If you look most (not all) cars that have a conventional door hinge/opening won’t have the door as the full height of the side of the car, there will always be some sill shown. This is so you can open the door over a kerb/pavement/sidewalk.

in terms of the roof the high point is just above the b-post. Perhaps this is possible with plates/tiles?

but taking a further look of the side profile I think you need to check some of your dimensions in the scale you’re using. But I also think that because you’re building such a large scale model that the details become more important and sometimes harder to capture in Lego as they’re needed to not make it look like blocky Lego. One example is the slight slope you’ll see on the top of the front fender (wing)

[MP LEGO Technic creations]

So, I haven't really made any improvements to the a-pillars yet but a few other things have been changed.

Apart from some minor reinforcements, these are mostly related to the rear part of the bodywork:

I've tried to reproduce the original's silver lines around taillights - plates looked too thick, therefore I've settled on much more eye-pleasing brackets, even though these are neither metallic silver nor around the very corners. (Note that rear doors still do not close as far as they should to blend with the body, I still need to figure that out...)

 

Other than that - I've tried another approach to doorsills. Now the difference is equalled by overlaying multiple parts right in front of the doors.

The boot itself is relying on a double hinge mechanism (as well as every door, I've probably forgotten to mention that before), there's nothing supporting its weight when opened, though.

 

 

I've also installed all four new extra hard shock absorbers.

 

As I've found, even though these new shocks look extremely stiff, every suspension setup has its limits  (Apart from suspension drop there's no visible bending when adding about 10 kilograms of random weight)

In my opinion the car's slowly getting into right shape. Of course there is room for further improvement.

[rm8]

door frame as headlight patience to you

p.s.: nice looking VAZ 2106

[MP LEGO Technic creations]

Hi everyone,

I've made a little progress on this. Apart from some minor structural reinforcements, both rear view mirrors have already been installed and I've finally got rid of that makeshift front bumper and replaced it with a proper one. The only thing I haven't fugured out yet is the silver stripe. At the moment, I can't think of any other solution than a sticker 

Anyway, I consider the whole front part fairly recognizeable, even though it looks a bit block-ish.

Other than that - after many not-so-well looking attempts at the rear window's metallic silver frame this is what I came up with (those LBG parts will definitely be replaced).

However, it's the opening mechanism of the boot that I'm the most proud of. Four shock absorbers inside of the boot lid should be a record, right? 

The upper pair of shock absorbers is responsible for a sliding movement, which ensures the other one additional range of rotational movement. Its result is the most satisfying feeling when opening and closing ever  

A little demonstration can be seen here (Flickr)

And finally - I haven't found any info about this yet. Instead of an explanation, every mention sounds like it's kind of a miracle that provides an unprecedented driving characteristics unmatched by any predecessor 

On 9/2/2024 at 4:00 PM, MP LEGO Technic creations said:

According to some sources the rear sub-frame is anchored by a Panhard rod. I have honestly never seen a Panhard rod on a semi-trailing arm suspension (only on live axles). Is there anyone who could explain this to me?

Edited September 17, 2024 by MP LEGO Technic creations

[Appie]

Very nice progress and that mechanism for the trunk is very satisfying to watch. It opening fully with a minor push at the start and it closing on its own after a minimal push is great.

[Seasider]

@MP LEGO Technic creations - sorry missed the comment about the Panhard rod. I’ll see if I can find some info for you.

[Michael217]

Greetings! I look at the back part, it turned out to be very high, it catches my eye very much, this part is not so wide on the original, I would make it level with this plane.

[Seasider]

Regarding the Panhard rod, found this for you …

“The R was for roadholding, and it added much-needed suspension enhancements that were dictated by then engineering director, Mike Dunn. These changes included stiffer anti-roll bars and firmer damping, along with a Panhard rod to limit the lateral movement of the rear subframe. It worked.“

I can tell you that Bentley uses isolated rear subframes (mounted to the body via bushes, not hard bolted) and so adding a Panhard rod would limit the Subframes lateral movement in a similar way to a live axle on leaf springs.

[2GodBDGlory]

3 hours ago, Seasider said:

Regarding the Panhard rod, found this for you …

“The R was for roadholding, and it added much-needed suspension enhancements that were dictated by then engineering director, Mike Dunn. These changes included stiffer anti-roll bars and firmer damping, along with a Panhard rod to limit the lateral movement of the rear subframe. It worked.“

I can tell you that Bentley uses isolated rear subframes (mounted to the body via bushes, not hard bolted) and so adding a Panhard rod would limit the Subframes lateral movement in a similar way to a live axle on leaf springs.

Wow, a Panhard rod to keep the subframe from moving! That's some wild engineering!

[MP LEGO Technic creations]

6 hours ago, Seasider said:

Regarding the Panhard rod, found this for you …

I'm really thankful for all this information 

Now, when I understand it in theory, I still have one other question. This diagram shows how rear subframe of this Bentley looks. There's a rear subframe crossmember connected to the final drive crossmember (that's where the diff is) via six rods. Are those multiple Panhard rods (I feel quite dumb asking this) or is there one anywhere else?

 

[Seasider]

I’ll have to look it up and see what those rods are, but I don’t think they’re the Panhard. You normally only have one rod, not 6.

where did you get the drawing from?

[MP LEGO Technic creations]

9 hours ago, Seasider said:

where did you get the drawing from?

I've found a service manual for Turbo R, which seems to be the same as for a bunch of other RR and Bentley cars of that time. Here's the link:

https://bmlec1heritageimages01s3.s3.eu-central-1.amazonaws.com/technical-library/TSD4700.pdf

To make your searching easier - the whole rear subframe is showed on page 285 and there are a few other diagrams on page 306.

I really appreciate your help!

Edited September 20, 2024 by MP LEGO Technic creations
typo

[dantheman12]

Im very absorbed in this WIP, the highly realistic mechanic parts combined with the system bricks for the panels is such a great combination, love the boot mechanism as well, it just perfectly mimics real life. Well done so far.

[MP LEGO Technic creations]

On 9/18/2024 at 5:48 PM, Michael217 said:

I look at the back part, it turned out to be very high, it catches my eye very much, this part is not so wide on the original, I would make it level with this plane.

I've worked on the rear part and managed to achieve a little improvement. I hoped it to be more visible but I believe that even one plate of difference in height can make a difference, even though not as significant.

Other progress includes the addition of a rear bumper and an exhaust pipe, either of these two could be easily rebuilt in the future if needed.

Problematic use of only one rim per wheel can be seen in picture below - I've tried many ways of fitting 11x11 technic ring into each tyre and connecting these to rims, unfortunately that didn't bring any positives.

And finally - I've started rebuilding the boot in tan, as this will be my version's colour of interior. I was once more surprised by how few tan liftarms there are available on Bricklink 

The whole underside will be covered in inverted tiles when finished.

I know that it would be better to place both a-pillars at a proper angle instead, the right time for that is definitely yet to come 

The weight of the car is now roughly 5 kilograms.

Edited September 30, 2024 by MP LEGO Technic creations

[bruh]

Wow dude, this has come so far since I first saw it! It looks very sleek, and although some of the issues pointed out are true, it is still a crazy feat of engineering! 
Also, props for incorporating System and technic together! 
By the way, what is the yellow machine on top of the Bentley? It looks sick!

[MP LEGO Technic creations]

16 hours ago, bruh said:

...

Thank you! A huge thanks goes to the amazing community of Eurobricks for help as well 

That yellow machine has been in progress for already about three years and it's a sugar beet harvester (in this photo without its front digging part)

You can find some further info here (although due to my laziness there are no recent updates...): 

I have another sugar beet machine from ROPA in progress, maybe I shouldn't create separate topics all the time.

 

[MP LEGO Technic creations]

Dear friends,

it's been a month or so since I've updated this topic and now I feel that there's a progress worth mentioning.

• The most significant change seems to be a completely reworked suspension setup. I finally got rid of all those turntables that unfortunately added friction (and made the model completely undriveable) in favor of conventional wheel hubs. I also couldn't stand those tyres falling off, therefore these had to be omitted as well. I'm glad to report that no more issues have popped up since. 
• There are a few design changes here and there, further reinforcements and such usual things.
• As far as the engine is concerned, I also wanted to try something different here (and I had a feeling that classic engine block would look too tiny). I know that there's definitely been another builder with same/similar idea, thus I won't claim any credit for designing it.

 

A few more shots of the bodywork:

 

 

 

 

 

The true pain turned out to be designing of the car's bonnet. I can't figure the right and stable geometry out for God's sake. My current iteration looks like this, it's faaaaaar from being useable, though:

Inner part of the trunk is now less colourful and more tan than ever before 

And a shot from the bottom, so I have something to conclude with. Those four links at the rear are used for stabilizing both semi-trailing arms (not realistic but... )

Now it's time to fill in the floor gap I guess.

Enjoy December, folks 

[2GodBDGlory]

I continue to love this model! The change to Unimog tires and Defender rims is probably wise from a usability standpoint. The studfull dark green bodywork just looks so good, and the scale allows for some interesting techniques! The large-scale V8 is pretty cool too! Similar to the old 2x2 square ones, but, well, round!

[tomek9210]

Nice changes! Would you mind showing us wheel hubs? Does the front suspension have all the proper angles? Kingpin, caster, ackerman?

[Aleh]

13 hours ago, tomek9210 said:

Nice changes! Would you mind showing us wheel hubs? Does the front suspension have all the proper angles? Kingpin, caster, ackerman?

Especially the rear one seems to be complex and realistic 

[damian_kane_iv]

A thing of brick-built beauty

[Mikdun]

It gets better with every iteration!