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Another Marui project - Ninja/Shogun 1 year 8 months ago #72181

It maybe time for me to start the active part of this project.

Except stickers, I have everything to be able to tackle the Ninja.

I ordered a bunch of modified pilots from Optima House : they have been modified  specially for me so it won't require any additional work to make the vent holes on the front (that was painfull when I did the Samurai). And when I say a bunch, I have around 20 of them. The 3 parts pilot will be easy to paint, and with the vent holes it should help to have this nice driver standing out (and yes, I intend to put it in many more cars, and the different possibilities of fixation make this quite easy :). Anyway, I picked up 2 of the box I received, and they will be for the Ninja and the Shogun, and I'll probably get 2 additional ones for the Samurais, so I can paint them all together...


I won't do my driver box art like. I do like to make different helmets at least. I have some ideas with those, and it will rely on some masking... And for sure the 3 parts head will make my life easier...

As for the wheels and tires, I hope to find some nice original foam wheels set for the Coors. For the off road tires, the problem is not that complex : the Ninja has a proper set of tires, and for the Shogun (and as well Coors offroad), there is some of the Tamiya tires which looks like the original Marui tires so that will do it,  but since they are 2inches, I'll have review the wheels size to accomodate with this. 

For the on-road tires, we are looking for wide tires (wider than most of the current tires). Some vintage references exists under HPI Vintage range, and as well within Tamiya range, but none is exact size apparently : I found some 34 mm width HPI tires, and I know that Tamiya has some 30mm wide slick tires. Original foam tires are righ in the middle of that, but on the other hand, the rims where the same except the colour and larger tires should work, as I believe original off road tires were 36mm width... We will see in time...

Beside the wheels, I'm still missing :
- a driver for the Coors
- central shaft for the Coors

For the central shaft, I thought about a aluminium rod in 8mm diameter, but when we tried to work it out on my brother machinery, it did not go exactly as expected due to the vibrations. My brother wanted to find another way to deal with this, and in the meantime, he proposed another alternative solution to try and which could evntually work:

- two wiper blades trimed to the proper length
- two pla parts, fixed with some band

It may work properly, and while I'm not confident in this on the longer run, as long as the blades are in opposition (they are slightly curved), that should work. I will give this a try (for the science :-) )...
I buy kits to built and ru(i)n them :-)
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Last edit: by silvertriple.

Another Marui project - Ninja/Shogun 1 year 8 months ago #72184

This afternoon, I put some wheels on my desk...

I started by the complex rims. Shogun wheels are highly refined. They are part of the nicest out there...

First a revolve to set the main bodies


I then did tried multiple ways to set the arms...

Not close enough... 

Decided the right way was to loft from a plan tangent to the wheel diameter to a plan perpendicular to the axis and to apply them some revolve to correct what was wrong...

And this is much better... I could not then resist to apply some gold :)


Then spend a bit of time to create tires (not perfect as I do not have new ones as a reference : this is derived from what I have.

(if someone has brand new tires available, height of the cone, center of the cone measurements please, plus one profile picture :) )

As there was still sometime, I decided to start the Ninja wheels, satrting by front one. Very easy rim to model. I will need to copy and past as new to derive the rear one from it (there should be Few measurements changing).


(there is just one single meausrement on the spoke which is improper but it is to respect the minimal 1mm thickness asked by most printers.

I have already a quick look at the tires, they are a bit more complex than others I did until now as this will require more than just one sketch per spike...
I buy kits to built and ru(i)n them :-)
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Another Marui project - Ninja/Shogun 1 year 8 months ago #72185

I love them.

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Another Marui project - Ninja/Shogun 1 year 8 months ago #72188

Removing the tire took a few seconds for the rear Ninja wheel...

Took the caliper and measured the width and other parameters required to be changed, and then went back to my stuff to fetch the front rim. This is similar as teh Samurai. both rear and front are different diameter. Finding tires will be as difficult as for the Samurai. Anyway, the original rims are in, and they are a good case for parameterized wheels, exactly like the Samurai, for the same reasons (but it will be less fun this time :-D)... But I won't tackle this now...

I buy kits to built and ru(i)n them :-)
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Another Marui project - Ninja/Shogun 1 year 8 months ago #72196

After this morning run, I went back home after the lunch, and decided to pursue the work on the Ninja, this time with the tires...

I did the front tire first. First the tire profile. Then five spikes to define as new bodies, each of them defined with  
- a point 
- a tangent plan at this point
- a sketch
- an extrusion, 
- and a midplane of this extrusion,
- a sketch
- two symmetric revolve of 90 degrees and an extrusion between
Then once every single spike is defined, I apply a circular pattern to reproduced the bodies along the tire profile, and then I combined them with the tire profile, and that's it :)


For the rear tire, the principle is exactly the same except there is 6 spikes to define...


Just had a look at the timeline when this was completed, it's quite heavy, and thanks my screen is a big one otherwise I would not be able to see it in full :)


Anyway, we have our wheels... A symmetry will be applied to get the four wheels with proper tire orientation (which I'm not sure what it is as I did not open the manual :-D)
I buy kits to built and ru(i)n them :-)
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Another Marui project - Ninja/Shogun 1 year 8 months ago #72197

Yeahhh awesome Marc 

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Another Marui project - Ninja/Shogun 1 year 8 months ago #72208

Today, after my work day, I took the Shogun chassis to check the status and content.

One hour to tear it down to parts.


It goes quite fast. It is definitely faster than when you tear a Samurai down to parts  :lol: 

Status :
- the sway bar is missing (but I knew that when I bought this car)
- rear gearbox is complete, but having small bevel gears in Nylon instead of metal (they were in Nylon on the Ninja) : I have metal small bevel gears somewhere for a while, as I suspected it could be the case.
- the right side of the gearbox is coming from a Ninja (black instead of grey) and at least two of the holes are bad. The holes may be an issue easy to repair, but it's black. The plan is to rely on OptimaHouse rear gearbox instead of this one, and I got it printed by Ryo in grey polyamide. It's lighter grey than the original one, but I intend to dye it in the proper shade of grey.
- the rear shocks are not Marui shocks, but Tamiya Super Hotshots rear shocks. Fortunately, I have a set of NIP Marui yellow shocks.
- there is a few metal sleeve which have  been replaced by copper, but I have what is needed to replace them.
- the central shaft is missing on one of the three cars, I would assume it is this one at this stage.
- the front gearbox is missing the bevel gear going to the central shaft. Fortunately, I have one already.

This car being the one in the worst state from the three Ninja, Coors and Shogun, I would say it is not to bad... And it's not that dirty, I guess the cleaning would not take much time (and there is not much metal parts neither, as all was entering in the two small buckets you can see on my work plate.
I buy kits to built and ru(i)n them :-)
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Another Marui project - Ninja/Shogun 1 year 8 months ago #72210

It's time to build the coors 😁😁😁😁
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Last edit: by stingray-63.

Another Marui project - Ninja/Shogun 1 year 8 months ago #72211

Actually, Flo, you are wrong : this is for the Shogun :-)
I buy kits to built and ru(i)n them :-)
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Another Marui project - Ninja/Shogun 1 year 8 months ago #72213

Replace it by the coors🤪

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