Szczerba's 3rd CXT, Build #57

[Szczerba]

Originally Posted by new2rocks

The axles are very similar to the SCX-width NC60s that are currently available through the BowHouse Shapeways store. Pricing will be slightly higher than the SCX-width version due to slightly larger size. We'll announce everything in a few weeks. And thanks to Shane for being the Guinea pig!


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Totally missed that question bigski asked but x2!

I used SSD rear XR Wide Mod and front XR wide mod CVDs straight from the packages with these housings and VP wraith parts. No issues.

[BigSki]

No worries mate, I didn't realize that these were made by someone else. I have lots of stl. files that would be soooo nice made out of metal, just haven't been brave enough to squeeze the trigger from shapeways.

Your walking beam- I'm guessing that the parallel arms are just to space the axles for measurements as it wouldn't allow for lateral flex? You gots to have flex...

[Szczerba]

Originally Posted by BigSki

Your walking beam- I'm guessing that the parallel arms are just to space the axles for measurements as it wouldn't allow for lateral flex? You gots to have flex...

Rear suspension flexes just like a 4-link setup. Since it has the lower axle "beams" it works in like a teeder-todder motion as well, on top of the normal 4 link action.

Ill get a short video up in a few days. Still tweaking on the setup.

[new2rocks]

Originally Posted by BigSki

I have lots of stl. files that would be soooo nice made out of metal, just haven't been brave enough to squeeze the trigger from shapeways.

Just an FYI - the material for the printed axle housings is what Shapeways used to call alumide. It's nylon plastic with aluminum dust particles mixed in and is only slightly more expensive than the standard nylon. The metallic particles give it a little sparkle and make it more brittle than their standard nylon. It looks great (and very metal-like) if you get it a little greasy and dirty. They also offer printed metals, but those are much more expensive. But enough from us...you're here for Shane. :-)

[BigSki]

Originally Posted by Szczerba

Rear suspension flexes just like a 4-link setup. Since it has the lower axle "beams" it works in like a teeder-todder motion as well, on top of the normal 4 link action.

Ill get a short video up in a few days. Still tweaking on the setup.

Not seeing how the 2 axles can 'cross up' against each other, hopefully the vid will clarify it.

[Szczerba]

Originally Posted by BigSki

Not seeing how the 2 axles can 'cross up' against each other, hopefully the vid will clarify it.

If you think of the driveshaft as the center pivot, then no, the axles cannot flex opposite of each other on that pivot. Ill take better pictures and video in the near future.

[CM9000]

Originally Posted by BigSki

No worries mate, I didn't realize that these were made by someone else. I have lots of stl. files that would be soooo nice made out of metal, just haven't been brave enough to squeeze the trigger from shapeways.

Your walking beam- I'm guessing that the parallel arms are just to space the axles for measurements as it wouldn't allow for lateral flex? You gots to have flex...

get what you want in nylon. you will be impressed.

im just waiting on a xr wide housing for the front of my sporty

I wonder what shane has up his sleeve for behind the cab on this one...

[ribaja]

Ok I need my CXT build fix more pictures and updates please please

[Szczerba]

Originally Posted by BigSki

I have lots of stl. files that would be soooo nice made out of metal, just haven't been brave enough to squeeze the trigger from shapeways.

:

Are you concerned with the strength of printed parts?

[Szczerba]

Originally Posted by CM9000

I wonder what shane has up his sleeve for behind the cab on this one...

Got the rear suspension to a final "mock up" stage last night. Started on the cab roll bar, cab second roll bar, cab top rack and mounted front bumper last night. Pics in due time.

Originally Posted by ribaja

Ok I need my CXT build fix more pictures and updates please please

I have this random picture of the front VP V2 front wraith axle with a Dinky RC steering mount. This work for now? Lol


How about a wheel picture?

[ribaja]

Originally Posted by Szczerba

Got the rear suspension to a final "mock up" stage last night. Started on the cab roll bar, cab second roll bar, cab top rack and mounted front bumper last night. Pics in due time.




I have this random picture of the front VP V2 front wraith axle with a Dinky RC steering mount. This work for now? Lol


How about a wheel picture?

Thanks I needed that lol

[Szczerba]

Also, Do I need a BEC?


Holmeshobbies SHV500 Servo

SPECIFICATIONS:

Weight: 73g
Dimensions: 41x20x40mm
Spline: 25 tooth (Futaba type) M3 threaded
Torque @ 11.1v: 32.4 kg/cm (450 oz/inch)
Speed @ 11.1v: 0.10 sec
Torque @ 14v: 37.5 kg/cm (520 oz/inch)
Speed @ 14v: 0.08 sec

[wblteen]

I thought you ran that servo straight off the battery. No BEC needed

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[Szczerba]

Originally Posted by wblteen

I thought you ran that servo straight off the battery. No BEC needed

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See sarcastic smiley face. Well, I wanted it to be a sarcastic smiley face.

Yes, takes up to 14volts direct, however you choose to supply it.

[wblteen]

I was wondering how you missed that, lol. Long night at work for me last night

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[CM9000]

.08 for speed and 520 oz at 14v? man.. that would be one bad A$$ servo in a 8ight 4.0.... strong servo right there.

digging the wheels shane!

[Shinjari]

Those wheels beadlocks? Love the military look of them =)

[Szczerba]

Originally Posted by CM9000

.08 for speed and 520 oz at 14v? man.. that would be one bad A$$ servo in a 8ight 4.0.... strong servo right there.



digging the wheels shane!

Yup, this will go up front and a hitec 7950 out back until i can get another shv500.

Originally Posted by Shinjari

Those wheels beadlocks? Love the military look of them =)

Nah, the tires will have single stage dueces wild foams, so glue the tires to the wheels and be done.

Primo R/C Engineering (joshtoyz4x4)
1.25" wide

[Szczerba]

Been working on this 3-4 hours a day.

Most of the metal work is done. Most. Top cab piece from grill to 1st rear roll bar is removable.
Rushing and making stuff up as I go, in my normal hacktastic fashion. Still a lot left to do.



The way I made the front of the top cage remove-able. Should have done this on the back end too. Nut welded to tube (pic before welding here). Used Carter Fab tabs to do the top side screw setup.

[Szczerba]

For those curious of the 5-link walking beam, here it is broken down.

Axles with two side beams and panhard mount.


Center pivot shaft/4-link setup


Together


Add some more shocks and custom made 1/4 steel links, slight bends on lowers. Panhard link is behind 4-link.
Front and rear shocks are externally limited 15mm, with 3k diff fluid in the shock bodies.
Center shocks are externally limited 8mm with 100wt shock oil and some sweet firm springs I scored off of ebay.