Limitless Liberty's "Unlimited" dream speed build - Stretched Arrma Limitless

LibertyMKiii said:

I am thinking about testing it out on a senton 6s or another SCT sized 1/8 GT setup initially. The shape and design would all be the same only would have to cut the back end shorter to fit that vehicle. I don't have the balls to drive that "stretched" carbon fiber chassis at high speeds until I prove the body has stability and reliable function etc...
-Liberty

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I think that's a very wise and frugal part of the testing phase. If you take it out before it's ready and wreck it you know that's not only going to cost you but it's going to set you back big time.

There's an old English proverb that fit's the bill; "Slowly, slowly, catchy Monkey".

GMballistic said:

I think that's a very wise and frugal part of the testing phase. If you take it out before it's ready and wreck it you know that's not only going to cost you but it's going to set you back big time.

There's an old English proverb that fit's the bill; "Slowly, slowly, catchy Monkey".

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Thanks! (I hadn't heard that one)

Here is a picture of the mold. It's coming along nicely!
The consensus is that it resembles a bathtub:

I have been debating on using s-glass vs carbon fiber. I'm about 90% convinced to use carbon fiber, since I'll have the antenna out above the body. (CF blocks RF)

Hopefully a few weeks till I have a body made!

-Liberty

LibertyMKiii said:

The consensus is that it resembles a bathtub:
View attachment 52408
-Liberty

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Omg I can’t ? that’s awesome.

@LibertyMKiii That's brilliant but yep 100% looks like a bathtub. Pmsl.

Actually @LibertyMKiii, it kind of looks like a bed pan, but it is just a mold. I'm sure the body will be super slick and aerodynamic AF.

Ahh, you've spent all this time perfecting and making a cat bathtub..!! ????



On a serious note, it looks sick as f*#k..!! I say lay up the body in carbon fiber and you have light and strong all in one..???

Excellent work 11/10..???

Notorious J said:

and aerodynamic AF.

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For any casual readers passing by this forum, the translation of that acronym is "and aerodynamic Arrma Forum"!

I was able to pick up a used 6s Typhon today for a smoking deal. This will be the test mule for the body.
I'd rather replace a $9 Typhon chassis during testing than what I have invested in this carbon fiber one.



Installed the new DS Blue 25kg servo in there also. It runs extremely quiet and fast. Hopefully it holds up well for me. (I have seen a few bad reviews on it)

LibertyMKiii said:

I was able to pick up a used 6s Typhon today for a smoking deal. This will be the test mule for the body.
I'd rather replace a $9 Typhon chassis during testing than what I have invested in this carbon fiber one.

View attachment 52803

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You got a fast one too ?

Note to any potential speed runners. Use GRP tires until you can't (they are rated to 160mph)

Their grip is easily 2x the BSR foams. BSR foams only grip well with significant downforce, but they are pretty much mandatory once you get to 160mph and above.

LibertyMKiii said:

Note to any potential speed runners. Use GRP tires until you can't (they are rated to 160mph)

Their grip is easily 2x the BSR foams. BSR foams only grip well with significant downforce, but they are pretty much mandatory once you get to 160mph and above.

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What shore BSR tires did you try? This kind of goes against what many speed runners do, so I’m trying to square it all.

jondilly1974 said:

What shore BSR tires did you try? This kind of goes against what many speed runners do, so I’m trying to square it all.

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I spoke with Philipp Jolley and he said it was the same experience for him. Couldn't get grip with the Typhon using foams. He was the one who said they likely need downforce to get traction and only uses them on certain cars.
Mine are softer than what many speed runners use Double Pink – Duro 35-40

Looking back and noticing tires used, I couldn't find any successful open wheel buggy runs on foams.

Man this is coming along nicely. Well done sir! Can't wait to see what you pull for times.

LibertyMKiii said:

Note to any potential speed runners. Use GRP tires until you can't (they are rated to 160mph)

Their grip is easily 2x the BSR foams. BSR foams only grip well with significant downforce, but they are pretty much mandatory once you get to 160mph and above.

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I agree. I like BSR's because the larger diameter gives you more top speed, but as far as grip goes it felt like about half the grip of a good set of GRP's. I have had practice runs where the car was fishtailing under acceleration at 90 mph because the BSR's couldn't hook up. The GRP tires would just hook up and go. I've only used the double pink BSR's, so maybe other compounds are better

Notoriousone said:

I agree. I like BSR's because the larger diameter gives you more top speed, but as far as grip goes it felt like about half the grip of a good set of GRP's. I have had practice runs where the car was fishtailing under acceleration at 90 mph because the BSR's couldn't hook up. The GRP tires would just hook up and go. I've only used the double pink BSR's, so maybe other compounds are better

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Same here all of my sets are XX Pink

LibertyMKiii said:

Same here all of my sets are XX Pink

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Tires, tires, tires. All you talk about is tires. Show me the body!!!!!(yelled at the top of my lungs like Cuba Gooding Jr.)

Notorious J said:

Tires, tires, tires. All you talk about is tires. Show me the body!!!!!(yelled at the top of my lungs like Cuba Gooding Jr.)

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Yesterday I wet sanded the mold all the way up to 1500 grit, and then ran over it with buffing compound and polish.
Tuesday I took a day off and will be doing a test body out of fiberglass. (the final will be Carbon Fiber )

Hopefully I have enough resin left!

LibertyMKiii said:

View attachment 53875


Yesterday I wet sanded the mold all the way up to 1500 grit, and then ran over it with buffing compound and polish.
Tuesday I took a day off and will be doing a test body out of fiberglass. (the final will be Carbon Fiber )

Hopefully I have enough resin left!

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??????

Although I scheduled a PTO day on Tuesday I got too excited and jumped the gun. I did 2-3 layers of standard boat cloth e-glass fiberglass. After the resin cured it popped out of the mold very easily. (sigh of relief)

This image is just after popping it out of the mold no clean up at all.


The below video explains everything, but this is a short version not made to the full length of the mold. Also you can see some white on it where some of the mold gelcoat pulled out and will need to be patched before I make the carbon fiber final product.

Very happy with the results!!!!

I have tested the body to 60mph so far. Nothing to write home about. Weather has been bad, and work is insanely busy. Weather is either too cold (I don't run my cars below 50 degrees) or the wind is blowing over 10mph or raining.

Been prepping the mold for a final product out of carbon fiber in my free time. Trying to get all the chips from the test body filled back in. Lastly I'm waiting for some free funds... Christmas has my wallet drained at the moment! Need about $150 in materials to do the carbon body.

Sometimes I just go in the garage and look at it for a few mins. I think my wife is getting jealous.