e's ExMT

[ekd]

Turns out even dogs can be hard on batts. My Boxer tried to wake up my rig a while back, and turned on 1 esc... ruining the A123s in it. I pull the plug now... every time.

Even after it was apart, he kept messing with the parts, in a box, for over a week. He doesn't seem to want to hurt it, just wants it to play. He's gentle, but quite persistent.

He'll get his own, but he's last in line. Schedule 80 PVC pipe is the current thinking on chassis material.

The Hawk is in transit! A sent a pic of his finished v2, and T loved it. He really refined the design nicely.

Thanks to all you guys, this is going to be a fun Spring.

 

[ekd]

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

I may have found the batteries for all the adult crawlers. At 16mm x 34mm @ 15g ea. these will put out 72A for 10 seconds. They can be fitted to rigs in a lot of ways (the A123s I have been using are cumbersome).

I'm a fan of LFP. A little safer than Lipo, and they hold a constant voltage until nearly discharged.

I ordered 4, we'll see how they hold up.

 

[ekd]

The Hawk came in, it's as pretty as the pic. Thanks, Adam... very nice work, and exactly what I had hoped for.

The quality is first rate, guys.

 

[CREEPERBOB]

What are the ODs of the bearings used in Axial and Venom knuckles?

The Venom knuckles use 10X15X4 inner & 5X10X4 outer.

 

[ekd]

Thanks, Bob.

It's pretty clear that the only way to put an 8mm setup into any of these smaller parts is to give up something I'm not sure we really need anyway... ball bearings.

Bushings are great for heavy but slow loads. Sounds kinda like us. I can cut bushings from high grade material (self lubing) for a decent cost, and they may last a lifetime under the conditions we face.

They could be cut to accommodate quite a deep recess into the various knuckles. All I need to know is the distance from the joint's pivot point and the inner face of the knuckle's inner bearing boss (the ridge between the K's bearings).

Anyone up for an ultralight Mad that actually steers?

 

[ekd]

A found these... I bought them for my M/M:

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

I'll get to see what real steering is like. "thumbsup"

 

[ekd]

There is plenty of clearance left, and these are made of far better steel than the previous parts I've cut.

3.71mm... and the joints will fit inside the Mad Cs with the bearing pocket deepened. With a generous but thin bell (9mm OD) cut at the outboard end of my shafts, 60* is possible in a stock axle.

Anyone interested in making an interesting trade for a chance at breaking rare stuff in a truly cold blooded fashion? PM me.

 

[TSK]

If you can get it to run bind free at that angle, you got something good going on"thumbsup"

Where'd you get that cool angle finding ruler?

 

[ekd]

If you can get it to run bind free at that angle, you got something good going on"thumbsup"

Where'd you get that cool angle finding ruler?

There is no interference to 90*, but the joint begins to bind (gets lumpy) at anything much over 60*.

It will take an odd link/shock setup to use anywhere near 60. Maybe later?

Digital Angle Protractor - Rockler Woodworking Tools

They are on ebay at about the same price. Search "digital protractor". This one is quite well made, I was a little surprised. Beats the crap out of trying to read tiny scribed lines... "thumbsup"

Wish I had one of these back when I was building speakers:

DigiCompass Precision Drawing and Marking Instrument - Rockler Woodworking Tools

When they cut the price, I'm going to have to do it.

 

[TSK]

There is no interference to 90*, but the joint begins to bind (gets lumpy) at anything much over 60*.

It will take an odd link/shock setup to use anywhere near 60. Maybe later?

Digital Angle Protractor - Rockler Woodworking Tools

They are on ebay at about the same price. Search "digital protractor". This one is quite well made, I was a little surprised. Beats the crap out of trying to read tiny scribed lines... "thumbsup"

Wish I had one of these back when I was building speakers:

DigiCompass Precision Drawing and Marking Instrument - Rockler Woodworking Tools

When they cut the price, I'm going to have to do it.

Well 90* ain't much if it's locked up. Bind free at 60* is a pretty good number.

And thanks for the link. i've been looking for something like that and didn't know what they were called.

 

[monkeyracer]

There is no interference to 90*, but the joint begins to bind (gets lumpy) at anything much over 60*.

It will take an odd link/shock setup to use anywhere near 60. Maybe later?

Digital Angle Protractor - Rockler Woodworking Tools

They are on ebay at about the same price. Search "digital protractor". This one is quite well made, I was a little surprised. Beats the crap out of trying to read tiny scribed lines... "thumbsup"

Wish I had one of these back when I was building speakers:

DigiCompass Precision Drawing and Marking Instrument - Rockler Woodworking Tools

When they cut the price, I'm going to have to do it.

I have built a few Subwoofer boxes, and made some speaker adapters for cars of various sizes, and never needed anything more than a normal compass or even just marking equidistant marks with a ruler. The speaker frame has a little bit of fudge room, and you can always cut small and shave to size.
Recent boxes I have built have the hole cut with my speed saw and circle jig.
That would make it nice to get the exact size circle though.

I'll be making a box for my new car when it gets here from Japan in 6-8 weeks, but for this one I might have the box cut with a laser cutter at school (if I can get lab time on it) for exact precise cuts.


Back to topic:
60* is more than enough right now, anything further and you start sacrificing shock/link geometry, etc.

 

[ekd]

I have built a few Subwoofer boxes, and made some speaker adapters for cars of various sizes, and never needed anything more than a normal compass or even just marking equidistant marks with a ruler. The speaker frame has a little bit of fudge room, and you can always cut small and shave to size.
Recent boxes I have built have the hole cut with my speed saw and circle jig.
That would make it nice to get the exact size circle though.

I'll be making a box for my new car when it gets here from Japan in 6-8 weeks, but for this one I might have the box cut with a laser cutter at school (if I can get lab time on it) for exact precise cuts.


Back to topic:
60* is more than enough right now, anything further and you start sacrificing shock/link geometry, etc.

You're right.. there is no need for a digital compass, but if they hit $20 too, I'm getting one anyway. :mrgreen: In tools, I'm a sucker for $20 precision anything...

I enjoyed making speakers, but dealing with 4x8 sheets is problematic now. I still make stuff for myself, though.

And, yeah... 60* is excessive atm, and may always be. But, after running stock angles, it sure feels good having "too much steering". You'll see.

 

[ekd]

If these perform anywhere near their ratings(3Ah), they should be perfect for the job. We'll know soon.

They sure fit a lot of places.

 

[ekd]

What is the typical steering angle possible in 2.2? I'm wondering if I should use the CVDs I already have, or get T some UJs for 12mm hexes.

I'm still looking for another set or two of stock Mad wheels, tires, and hexes. The clean set Don sent has been finished... rims narrowed 12mm, and the treads cut to relax the shoulders. The tires take the new shape nicely now, and I think I'm going to try memory foam over the narrowed stock foam for the rover, and the upcoming kid's rigs. The stockers work OK on this terrain, but bounce a little, and it's high time I learned more about foams anyway.

 

[Abavuso]

With the XR-10 UJ's you can get almost 60 out of them and thery are really stoute too. I would stick with your CVD's till the blow up then move on to something diferent.

 

[asw27x]

i have an xr-10 with grinded uj's and i get about 55 or 60 i dont know

 

[ekd]

Thanks, guys. Looks like I'll get some use out of the CVDs. I didn't realize there was room for that much angle on the little rigs.

When the links show, I'll be able to check clearances in mock-up. I'm holding off on the axle/link mounts... I'm finding out just how little wiggle room 2.2 guys are living with... no room to guess on these. I'm learning a lot from this rig.

I hope the AAs work. The kid's rigs will be (sorta) Supers... I'm thinking +30mm M/Ms, so the batteries would all fit on the axles. Would make for simple, durable and fun crawlers at a good price.

 

[ekd]

The little LFPs came today. $10 for the 4, but a long wait.

60gr total... and a really useful shape. If they perform, I'll be going for more.

 

[Abavuso]

The little LFPs came today. $10 for the 4, but a long wait.

60gr total... and a really useful shape. If they perform, I'll be going for more.

I'm not seeing your photo.

Sent from my PC36100 using Tapatalk

 

[ekd]

That's odd.

Works here.