Mojave Project Aero Max - Arrma 6s based speed runner

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Been working on several things lately with this car in CAD/3-D printing. Big thanks to @Tex Koder with an idea of what may have been wrong with my printer and he was right (dual Z-screws were not aligned.)

Out of the several things I am working on this little nugget is ready to show to you now. It is the rear arm/axle cover. There will be no rear upper a-arm 🤯 (more on this later)

This 3D printed part is a 2 Piece design that allows it to be removable. Now that I have decided to run it with no upper arm, I'll have to fill in that hole in the body where the upper arm went 😩

1670353850593.png
 
LibertyMKiii said:
Been working on several things lately with this car in CAD/3-D printing. Big thanks to @Tex Koder with an idea of what may have been wrong with my printer and he was right (dual Z-screws were not aligned.)
Click to expand...

Glad to be of assistance buddy 👍

LibertyMKiii said:
Out of the several things I am working on this little nugget is ready to show to you now. It is the rear arm/axle cover. There will be no rear upper a-arm 🤯 (more on this later)
Click to expand...

No Upper linkage (Zero, Zip, Zilch, Nada) on the rear suspension arms!!

That's taking streamlining to a whole 'nother level! 🚀

LibertyMKiii said:
This 3D printed part is a 2 Piece design that allows it to be removable. Now that I have decided to run it with no upper arm, I'll have to fill in that hole in the body where the upper arm went 😩

View attachment 260788
Click to expand...

Try using the clear plastic lids from a croissant box or a regular milk jugs as mending plate material ,to cover that hole.
Cheap, Plentiful and Easy to cut & work with.
You can double or triple layer it to stiffen up the area too.

1670356605926.png
 
Tex Koder said:
No Upper linkage (Zero, Zip, Zilch, Nada) on the rear suspension arms!!

That's taking streamlining to a whole 'nother level! 🚀
Click to expand...

Thanks man!

Tex Koder said:
Try using the clear plastic lids from a croissant box or a regular milk jugs as mending plate material ,to cover that hole.
Cheap, Plentiful and Easy to cut & work with.
You can double or triple layer it to stiffen up the area too.

View attachment 260804
Click to expand...

I am going to use fiberglass to keep the body a consistent material and strong.
 
Last edited:
Kindof off topic, but this video includes the very beginning of an early 00's late 90's Indy car, and there are a ton of cool little details if you are looking for them, like the airfoiled control arms. Might be able to get a couple ideas for this project, or others.

 
***If all goes well with what I have built so far during testing....

I have been dreaming today about a later phase of the project where the airfoil arms will be dynamic wings that can be driven off a microcontroller and go through a range of motion depending on the throttle input or braking, aggressive angle of attack at lower speeds then reduce that angle when the throttle input is over 50% up till 100%. Then stand back up for aiding in braking.

I took a brief look at RC plane hinges today and don't like anything I had seen. Most were plastic. I see most of the large-scale plane guys make their own using a metal tube or part of the main wood structure with bushings. I could see the leverage of the airfoil providing 10 + lbs force at extremely high speeds, so I may just have to make something....

The hinge may be the easy part. I am a little unsure how I would drive the action. My initial thoughts were maybe a metal bar across with gears inside the airfoil. The only issue there is that the suspension is going to move so the gear mesh might not hold 😩

I like this top shape the best for what I would need:

dynamic wing.jpg
 
LibertyMKiii said:
***If all goes well with what I have built so far during testing....

I have been dreaming today about a later phase of the project where the airfoil arms will be dynamic wings that can be driven off a microcontroller and go through a range of motion depending on the throttle input or braking, aggressive angle of attack at lower speeds then reduce that angle when the throttle input is over 50% up till 100%. Then stand back up for aiding in braking.

I took a brief look at RC plane hinges today and don't like anything I had seen. Most were plastic. I see most of the large-scale plane guys make their own using a metal tube or part of the main wood structure with bushings. I could see the leverage of the airfoil providing 10 + lbs force at extremely high speeds, so I may just have to make something....

The hinge may be the easy part. I am a little unsure how I would drive the action. My initial thoughts were maybe a metal bar across with gears inside the airfoil. The only issue there is that the suspension is going to move so the gear mesh might not hold 😩

I like this top shape the best for what I would need:

View attachment 262927
Click to expand...
That would be awesome,
Kind of like Travis Pastranas new Audi gymkhana car, with the active aero for braking
 
vwturbowolf said:
That would be awesome,
Kind of like Travis Pastranas new Audi gymkhana car, with the active aero for braking
Click to expand...
It's actually a Subaru GL Wagon dubbed "The Family Huckster". Block's the one with the Audi hoon machine ... and it's electric at that.

More to the topic: when an idea strikes and the part doesn't exist, 3d printing is a godsend. I can tell this project is incredibly serious if you're encasing suspension components in aero.
 
I'd research bellcranks and levers, much more likely to be able to mount the servo remotely and use a bit of rod and a bellcrank to pivot things upward. or put the dynamic downforce in the body voids instead of the arms (going to look like actual airplane arms at that point with all the electronic guts!)
 
autolex said:
I'd research bellcranks and levers, much more likely to be able to mount the servo remotely and use a bit of rod and a bellcrank to pivot things upward. or put the dynamic downforce in the body voids instead of the arms (going to look like actual airplane arms at that point with all the electronic guts!)
Click to expand...

Wow that is freaky! Do you have a hidden camera in my garage????

1671211637419.png

1671211681438.png


To clear the steering bits I'll have to put some bend in it. If I use ball bearings in the center section (which I plan to) This may have to be a 3 piece part given that you cannot slide ball bearinds down a rod with all sorts of bends in it.
 
Alright, alright, alright I have been working on something secretly and I'll show you the back side of it to make this a little harder.
I want to see if you can tell me what it is for (all can play except for @Tex Koder who already knows)

1671214780261.png
 
RadioHacktive said:
Those look like the wheel weights for crawlers, BUT, I see that these were 3d printed and judging by your aero work for the a-arms, I'll say those are panels to smooth airflow behind the wheels.
Click to expand...
Nailed it!
The plan is to run the car open wheel to see if it can set any records. I want to keep the air passing by the wheel and not trying to go inside of it.
 
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