Systems tractors and other machinery

[1gor]

On 7/30/2021 at 9:33 AM, Rebel_Lego said:

Looks great, only the rear mudguards look off to me. They are to high above the wheel I think

I hope that this correction is satisfying

@eric trax I made photos of mudguards correction and put one thin yellow plate on bonnet to make it look realistic as I can with parts that I have

Next project development will be uploaded when some development would actually be done 

[Teo LEGO Technic]

This whole topic is filled with amazing work, looking forward to updates!

[Rebel_Lego]

Looks better now! Great work!

[1gor]

On 8/3/2021 at 6:17 PM, Teo LEGO Technic said:

This whole topic is filled with amazing work, looking forward to updates!

Thank you very much.  I feel honored despite developing one MOC (like Unimog or Fastrac) about 2 years each.

On 8/3/2021 at 6:43 PM, Rebel_Lego said:

Looks better now! Great work!

Thank you. Every idea, critics are always welcome. Feel free to express your self no matter it's praise or critic, noone is perfect and you can always see what I missed or didn't notice.

Edited August 6, 2021 by 1gor

[Jundis]

The bonnet now is really as perfect as you can get with the current Lego parts available. Great work, Igor :-)

[1gor]

6 minutes ago, Jundis said:

The bonnet now is really as perfect as you can get with the current Lego parts available. Great work, Igor :-)

Thanks buddy. Lucky for me my next project has no bonnet, so after solving drive (multiple steering modes and independent suspension are solved) and pto propulsion, there will be simpler task; cab and sides. It is the same scale based on 94.3 x 38 tires. Ideal will be to finish it during August (if solve drivetrain isduethis week) and from September to gain new 81 x 35 tires from Zetros for one smaller classic tractor (about 100hp).

[Thirdwigg]

Again, great work. The shape of the cab and bonnet are perfect. And boy do those tires look great here.

[1gor]

3 hours ago, Thirdwigg said:

Again, great work. The shape of the cab and bonnet are perfect. And boy do those tires look great here.

Thanks buddy 

As I always think I can improve something, so did cab and specially bonnet development took loooooooooong time to look like something valuable for sharing. Tires are real blessing for us tractors and machinery builders and new 81 will enable me to make some classic tractors or even smaller combines or telehandlers in future.

[1gor]

Little update in next project (yes, Fastrac will not be taken apart and Unimog optimisation follows).

Axle design

Chassis with steering, independent suspension, drivetrain (except motors)

(Sorry for bad photo quality)

As you can see wheelbase is 28 studs (3300mm real machine) and Unimog tires will be used to pretend tire with industrial / utility tread pattern.

[GerritvdG]

I like the way you share the process of creating your MOCs! That’s much more interesting then only see the end product.

what will this next project be? Or did I miss something?

[1gor]

On 8/5/2021 at 9:53 PM, GerritvdG said:

I like the way you share the process of creating your MOCs! That’s much more interesting then only see the end product.

what will this next project be? Or did I miss something?

This one; 

...but trailer will be done in future when I use all pf elements that I have + some other MOCS...  and will have tires pictured above

Edited August 16, 2021 by 1gor

[Jundis]

11 hours ago, 1gor said:

This one

Really nice pick for the new 81 tractor tires!

In general, I am really curious which agricultural builds will be done with the newer tires and the multiple combination ;-) 

Edited August 6, 2021 by Jundis

[1gor]

10 minutes ago, Jundis said:

Really nice pic for the new 81 tractor tires!

In general, I am really curious which agricultural builds will be done with the newer tires and the multiple combination ;-) 

In my chosen scale Deere 6m series, CLAAS Atos (those about 100hp) are possible; SynTrac with 81 mm tires would have to fragile suspension (tested with 81.6  balloon tires), so 94.3 are best fit for 1:15 scale and suspension is strong enough; @Madoca 1977 tested similar solution on his gorgeous tatras very successfully.

Kind regards

[1gor]

@Jundis, today I saw Fendt 411 with rear 600/65r34 tires, so if Lego releases red rims 43.2 x 26 this trac can be done; and I have lime rims from formula offroader so I'll test something after SynTrac is done 

[1gor]

After several days of absence from LEGO, today I had couple of hours or so time to work on Syn-Trac 420 project and finish drive and steering...but let pictures speak instead of me...

(To make it finished I'll need red shocks and dark bluish gray biscuit pieces)

[GerritvdG]

Wow, impressive! Can’t wait for the next step 

[1gor]

Thank you very much 

Because it is cloudy today where I live I could find some time to work on it later today, but after after installing battery box and receivers I'll have to test it to see if there is a need to make some changes if something will not end up without desired stiffness.

[1gor]

Small update; axle optimisation that results with change from 36 tooth to 20 and made chassis more simple and robust....

Any comments are welcome

 

[jorgeopesi]

It looks very good, your optimizacion of the space is getting better and better. I like to see machinery I did not know yet.

[1gor]

1 hour ago, jorgeopesi said:

It looks very good, your optimizacion of the space is getting better and better. I like to see machinery I did not know yet.

Thanks buddy; optimisation has one more benefit - more parts for next MOC. Mostly i look to make machinery that is unordinary and systems tractors are one of them. There are some futuristic concepts that I'm considering to made, but that is the possibility for future. In this MOC there is only one challenge left actually; to make proper sides using panels, but have to fix receiver holders. What I made so far is just placement not finished solution.

Edited August 19, 2021 by 1gor

[1gor]

Since @Jundis noticed that new Zetros tires will be ideal for SynTrac, to make Fastrac in appropriate scale I needed tractor tires with 87 to 94mm diameter. So in the meantime (when babysitting my 4 months old kitten) I got an idea for 1:18 scale Fastrac 8330. Rear tires are no specific problem (710/70R38 have 1959mm diameter and in 1:18 scale this is about 109mm which can easily be done with putting 94.8 balloon tire inside CLAAS tire and on standard wheel racing medium 56x34mm), but what about front tires? At the moment of writing this post I have not a slightest optimismus that Lego will produce tractor tire with 94mm diameter. So last few months I have thinking how to stretch Zetros tire but maintain correct shape...and I need at least 87mm for 1:18 scale (as you can see on image below smallest front tire is 540/65R34 - tire with 1566mm overall diameter).

My idea is to put tire 24 x 43 from 851 set inside Zetros tire to maintain bigger diameter. 24 x 43 is narow 82mm tire that if fited inside Zetros tire (which usas you know 81mm) could give needed diameter. So I've put it inside and there is tire with 87.5mm diameter (just need to fit Zetros tire nicely to sides and problem is solved - at least this one).

Any comments (specially from purists) are welcome

Edited November 8, 2021 by 1gor

[Jundis]

1 hour ago, 1gor said:

So I've put it inside and there is tire with 87.5mm diameter

This really works? I'd never have thought that you could stretch a lego tire to this extend! If it works, it works. :-)

[1gor]

10 minutes ago, Jundis said:

This really works? I'd never have thought that you could stretch a lego tire to this extend! If it works, it works. :-)

It works another question is weather this harder tire has less grip on soft surfaces, but I don't plan to run tractor outside... Sadly I can't make video because I need extra hands for that purpose, also I don't recommend this to someone who doesn't have strength in fingers. Let's say I have some experience with Lego tire modifications in the past... After kitten will be few months older I'll start to work (again) on Fastrac 8 series chassis...(it will be more compact than current 4 series and will end up packed with motors...) I'll probably stole idea for front wheel steering with m-motor from @Ngoc Nguyen's PF modification of Zetros...to save space in central part to install technic battery box.

You can read dimensions on digital caliper...

[Ngoc Nguyen]

1 hour ago, 1gor said:

I'll probably stole idea for front wheel steering with m-motor from @Ngoc Nguyen's PF modification of Zetros

I tested that idea on the 42124 PF Conversion, and it turns out it didn't really work well. In the 42124, It can steer while the front wheels are rolling, but can't steer when the model is standing still. The direct output from the motor doesn't have enough torque to overcome the weight and friction of the wheels.

[1gor]

30 minutes ago, Ngoc Nguyen said:

I tested that idea on the 42124 PF Conversion, and it turns out it didn't really work well. In the 42124, It can steer while the front wheels are rolling, but can't steer when the model is standing still. The direct output from the motor doesn't have enough torque to overcome the weight and friction of the wheels.

My problem with PF servo is that after some (short) time wheels return to starting position...