SG PRIMA - Bandit Inox A2

[Trass]

Hi all,

To change, a small chassis (1/8) that I unearthed via FB and a Greek enthusiast who was kind enough to sell it to me as I wanted, that is to say without what can be associated with nitro (engine , tank ...)

This is an SG chassis and the model is "PRIMA".

Simplistic chassis moreover, but well thought out on a lot of things.

It arrived as it is, missing the front bodypost, i will fix it;) and the front bumper is as I would have wanted if it was me who had prepared this chassis, because I have the body for a while...

It will of course be equiped with stainless steel A2 screws;)

Here are the photos at receptions....... IT SHINES!!!!





I've started some small work as it will go off the shelf and potentially be in working order, but in an electric version.... SACRILEGE will you tell me, I would reply that SG has done a lot of electrics compared to its counterparts for years 80.

Before the dismantling to make it a little more different and changing screws, I noticed the rear transmission axle, the brake square and the spur holder were not shiny enough.

Also, the rear axle was not free as it should be...

I looked at the chassis which is neither twisted, nor veiled, nor anything at all and I noticed something rather suspicious.

The distance between the two rear transmission bearings had a difference of almost 2 millimeters (just over 1.5mm) between the chassis and the upper part, despite the black reinforcing steel piece.

After trying to unscrew/rescrew, nothing works.

So I decide to create a spacer "flange" which will also be used for the rest. Witj this trick, no more worries and the rear shaft is much freer!!!

The measurement is not easy because the bulks are not symmetrical/ identical and have particularities.

Here is what it looks like;










And here is the body that will go on it: SG BANDIT taken from the McRea GM9 (1980-1983)

So it was another coincidence that the GREEK FB member had the same bodywork, which is what made me decide to buy it.
As much to tell you that I would have the front bumper less to do...







Jerome

[Trass]

So I completely disassembled the chassis (last weekend) and I started to give it a little cleany shiny time.

When disassembling, I noticed a few things:

First, the inserts in the rear bearing supports are not all pushed in "fully" (there must be less than 1/10 mm) and it must play on the previous problem that I solved with my aluminum part made above. The remedy will be extremely simple with a little filing.

Secondly, an axis of the servo mount is made of brass or similar, the 3 others are of steel ...

Thirdly, the white of the rear bearings supports and the front crosspiece, just like the spur gear are not white it deserve ...

Hydrogen peroxide + sun, only 4 days outdoors since last Saturday, and that with rain at least one day



BEFORE:






AFTER:






This project, like almost all my preparations and restorations, is the subject of a total change of the screws and bolts by a stainless steel A2 version and a small "RESTOCK" is necessary.








TADAMMMMMMMM!!!!








BUT ... I'M an a-hole ... SOME NECESSARY A2 STAINLESS STEEL ACCESSORIES HAVE BEEN FORGOTTEN, WHICH WILL DELAY THE REBUILT




Jerome

[Trass]

Hi

The reassembly started last night to extend until now without really being finished.

Electronics will be vintage Sanwa


Here are the pictures with a few caveats...


Attempt to mirror polish the chassis to make up for certain imperfections.
The most visible imperfections are gone, but some scratches are not!!!

In addition to these scratches that remain, lots of micro-scratches from polishing have appeared and I can't seem to make them disappear.







Assembly of the rear cell and the front axle and change of the screws in full A2 stainless steel












Polishing of my personal piece.
Once polished, you might think it's original






Change of steel pin on the servo supports by A2 stainless steel version.





File adjustment for the rear pod cup washers so that it looks much nicer











Small overview






I decided to put back the original braking system , but the latter will work together with the mechanical variator.





Realization of the motor control servo cable passage .















Overall view with the bumper that will blend perfectly with the bodywork





THE FAMOUS POLISHING SCRATCHES and THE BIG SCRATCH !!!










To be continued...

jerome

[Dadio]

That looks stunning , I've never seen servo mounts like those , very clever . The fine polishing scratches might be from dirt in the cloth and they also look Linea , polishing should be done in a circular motion but don't let it detract from such a beautiful car , well done

[Trass]

That looks stunning , I've never seen servo mounts like those , very clever . The fine polishing scratches might be from dirt in the cloth and they also look Linea , polishing should be done in a circular motion but don't let it detract from such a beautiful car , well done

Thank you!
They are from SG
I tried to remove polishing scratches with new clothes/cotton at each step, nothing done as i wish.
I will buy a rotary polishing machine to try.



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Here are the progress from last night.

I started to make a plate which will receive the receiver and the speed controller



Tiny drawing made with a small washer:






A piece of carbon from a 1/12 chassis in bad condition:





Drilling holes:





A big cutting/filing/vacuuming session:












Tadaaaaaa:






Test :





Installation of the inserts that will be used for fixing:











Test with the future receiver (it will be restaured too):








To be continued ...


Jerome

[Trass]

I did some tests with an original Graupner variator.

That's good !!!.

I also made sure to "restrict" the reverse gear by playing on the brake stop;)

So, I validated and I made holes...















Jerome

[Trass]

Hi,

Here is some work of last few week on this chassis:

optimization in 3d print of the speed controler mount




Here is the result once printed and installed:











lot of work for body mount and kind of realistic parts

There are a lot of pictures missing that I forgot to take

Here are the pics, a bit out of order:



































To be continued ...



Jerome