New zzmt build

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redrustbucket
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Re: New zzmt build

Post by redrustbucket »

The devil made me do it the first time, the second time I done it on my own...
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frizzen
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Re: New zzmt build

Post by frizzen »

That looks great. I'd love to find one for a ZZ-M accessory. Or maybe something useful to do with the PowerScout chassis...

So, from a pic on Ebay, the Stomper sled seems to just use a string for weight box. Molded pulley at top of ramp. Probably string just fixed around forward axle? Gravity all that holds box on track?

***EDIT***
Hey, look what I found...
http://www.patentgenius.com/patent/4389810.html


Um, I guess with as often as I'm hijacking threads, I need to change my avatar to a CooperLock.
Last edited by frizzen on Mon Feb 02, 2009 6:20 am, edited 1 time in total.
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Re: New zzmt build

Post by redrustbucket »

Yep, that's pretty much how they work.
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Re: New zzmt build

Post by redrustbucket »

Ordered this today.
http://www.microflight.com/Online-Catal ... -bare-cell
2-4 weeks delivery so I guess I've got time to mess with some other stuff on it.
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Re: New zzmt build

Post by redrustbucket »

Made some progress. :mrgreen:

Take one new se chassis.
Image

Remove pcb and battery.
Image

Hack off front end.
Image

Remove top cover and steering motor.
Image

Trim till you have this left over.
Image
Voila! One stupid low reduction box.

Did some preliminary body mock up as well.
Image

Image

Image
It will sit higher and farther back than the second pic shows but you get the idea. :-o
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Re: New zzmt build

Post by redrustbucket »

Progress...

Had to hack out a spot for the reduction box to sit low and forward. Without the hacking, the pinion won't mesh. I ended up reinforcing the chassis with a piece of aluminum also.
Image

Couple of shots with final trim to fit and the tab to hold the box.
Image

Image

Test fit. Mesh looks good. Hope to be able to adjust it some by bending the tab.
Image
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sidewinder
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Re: New zzmt build

Post by sidewinder »

I gotta say, I love your builds, they are really thought out. :-o
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Re: New zzmt build

Post by redrustbucket »

Thanks. If I could do the same thing twice they'd go a lot faster but I'm always tweaking something.
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frizzen
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Re: New zzmt build

Post by frizzen »

Dude you were right, trimming the drivecups makes it way more better!

I just trimmed a set for my Tatra, slapped some electronics in, and now despite the solid axles and a 4" wheelbase, it'll turn within about 2 feet. Tires turn to just before rubbing the chassis. It's nice to have that truck move under its own power, thanks for the push.
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redrustbucket
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Re: New zzmt build

Post by redrustbucket »

Sweet. Glad it worked for ya. :-o
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Re: New zzmt build

Post by supergroup_crawler »

RRB, that's the problem I had with the SE gear box. I didn't think to put it on the shaft.
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Re: New zzmt build

Post by redrustbucket »

So yours was skipping teeth right? Doing it this way solves that problem.
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Re: New zzmt build

Post by supergroup_crawler »

I responded to your post on RCcrawler about my problems with the SE GR. I never got to the point of testing it to know what you are talking about with the teeth missing. I wasted a micro servo and an SE trying to hack a GR box for my Willys. I just went about extracting the gear box the wrong way and was never happy with the way it looked. Hard to explain but if I had to do it over again I would definitely do it the way you've done it.

You've got me itching for another build. As soon as I finish up this Bronco scaler I've been poking around on for about a year it seems. :roll:
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Re: New zzmt build

Post by redrustbucket »

Okay, I thought you had installed one.

Yeah, remove it like I did and then trim the rear of the mt chassis down and you can epoxy it on top so it meshes with the drive gear. There's no real need to mount it out front like I did with this one but it will help lower cog and move weight forward. The trick is getting the mesh tight but not too tight. There's a lot of slop in the se gearbox.

Not sure if I explained this before or not. If so disregard. :grin:

Start it anyway. I've got projects in every scale going on right now. I get burnt out on one and switch to another. Just keep coming back till one's done.

Interested to see what you come up with.
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redrustbucket
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Re: New zzmt build

Post by redrustbucket »

frizzen wrote: ***EDIT***
Hey, look what I found...
http://www.patentgenius.com/patent/4389810.html
Funny someone patented that.
The devil made me do it the first time, the second time I done it on my own...
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