Build Project: Midnight Panic

[ridenby]

But you didn't post the best pic...

Absolutely just cooler than hell.

 

[WaterH]

Hopefully it just pops the hose before mechanical failure, cause mechanical failure can be un predictable.

In the very last part you mentioned it was plumbed differently than before and thus now slower, I assume it was in parallel before and now series, or vice versa?
I'm sort of confused as to how that would work, I might need to draw that out to see what was going on.

It was in series before, so the pump only had to fill one cylinder. The fluid leaving that cylinder would fill the other. Now the pump has to fill both, so it’s twice as slow and twice as powerful.

 

[Wisconsinite]

Watched the whole video last night, great work man. I was very confused as how you were getting a reliable ground through the cyl and paint. Then you moved the ground directly to the cyl and it made me chuckle.

Keep up the good work.

 

[CarterKraft]

Brain is broken

Which way was it before, and which way is it now?

Since these cylinders don't have snubbers or bypass ports in the cans it will be very hard to get all the air out of the interconnected hose...

 

[Skipped_Link]

This is how it was plumbed before.

This is how it is plumbed now

 

[CarterKraft]

This is how it was plumbed before.

This is how it is plumbed now

But the red/blue are crossed?
As it is in the pic, nothing will move?

 

[WaterH]

But the red/blue are crossed?
As it is in the pic, nothing will move?

That is showing the plumbing, but the piston placement in the drawing is not correct. In practice, one piston would be full retract and one full thrust or both centered in stroke.

 

[CarterKraft]

That is showing the plumbing, but the piston placement in the drawing is not correct. In practice, one piston would be full retract and one full thrust or both centered in stroke.

Not as I see it.
Driving straight the pistons will nearly be centered (or very close) to allow for extension/retraction for right left turns.

 

[WaterH]

Not as I see it.
Driving straight the pistons will nearly be centered (or very close) to allow for extension/retraction for right left turns.

Yes. When you steer, one would retract and the other thrust. In the drawing , it shows them both retracted which could never happen. But the drawing was only to show plumbing.

 

[Skipped_Link]

But the red/blue are crossed?
As it is in the pic, nothing will move?

correct, that is the wrong schematic,

This is how it is plumbed now.

 

[CarterKraft]

correct, that is the wrong schematic,

This is how it is plumbed now.

Did you do any purging of the system when it was set up the other way?

I bet it was nearly impossible to get all the air out of the "inner" hose, which would cause the lack of control.

 

[Skipped_Link]

It was all air in the rod end if the cylinders,
Only residual oil, (very little)
In theory the tie rods should basically be linking the cylinders together to work the same as one dual ended ram, no?

 

[CarterKraft]

It was all air in the rod end if the cylinders,
Only residual oil, (very little)
In theory the tie rods should basically be linking the cylinders together to work the same as one dual ended ram, no?

Yes but you effectively only have one cylinders surface area not two ( if i am thinking about this right)

Edit: Probably why it was so fast.

 

[Skipped_Link]

Yes but you effectively only have one cylinders surface area not two ( if i am thinking about this right)

Edit: Probably why it was so fast.

I actually had more surface area than a dual ended cylinder with the same bore/piston size.



Either way, the check valve worked well this weekend, no more tires flopping around, & no broken cylinders.

Before heading out I added a little more containment to Allison’s seat, & we improved both of our head/neck restraint systems.

The front steering cylinders were changed out, & the leaking wheel was disassembled & re-sealed,

This weekend was 2 days, one show per day,
We completed two trick, racing, & freestyle both days, even winning racing & freestyle on Sunday,

I will say the rear steer is to slow, especially in this smaller venue, I felt I was fighting that more than anything,
Also I seen the transmission up around 275° after freestyle, so I may have to look into a converter change soon,

I have two wheels leaking again,,,,the two halves of the wheels are trying to come apart & bending at the flanger/bolt pattern,looks like a wheel upgrade will have to come sooner than later.

I’ll see if I can insert a short clip from our Sunday freestyle run.

 

[CarterKraft]

I actually had more surface area than a dual ended cylinder with the same bore/piston size.



Either way, the check valve worked well this weekend, no more tires flopping around, & no broken cylinders.

Before heading out I added a little more containment to Allison’s seat, & we improved both of our head/neck restraint systems.


,

I'm sure but there is no oil acting on the second cylinder in the first version so you really just had two single acting cylinders.

24v should nearly double the speed right?

edit" it still kicks ass, but does look like the rear isn't keeping up.

 

[Mr. Mindless]

I like your RII lane light style 👍

 

[Thornbird1]

nothing like building a legit monster truck and taking it monster truckin. Badass

 

[CarterKraft]

nothing like building a legit monster truck and taking it monster truckin. Badass

If I won the lotto I don't think I could pull off what he's done

 

[Skipped_Link]

24v should nearly double the speed right?

According to google, twice the input voltage should gain nearly twice the motor speed,
So using 24 volt should be quite an increase in speed.

I’ll be re-wiring & hopefully testing that next days off.

 

[WaterH]

According to google, twice the input voltage should gain nearly twice the motor speed,
So using 24 volt should be quite an increase in speed.

I’ll be re-wiring & hopefully testing that next days off.

So how would you accomplish this? Some kind of transformer? Just another battery. I suppose you can charge a battery for each show.

Edit, I wonder if a Dewalt battery could run that thing for a show? You could probably even get dewalt to sponsor you. lol.

 

[SLOWPOKE693]

According to google, twice the input voltage should gain nearly twice the motor speed,
So using 24 volt should be quite an increase in speed.

I’ll be re-wiring & hopefully testing that next days off.

Would upping the steering hose size from -6 to -8 increase the flow/speed? Those hoses (-6) seem small for having to move such a large amount of fluid quickly.

 

[CarterKraft]

Would upping the steering hose size from -6 to -8 increase the flow/speed? Those hoses (-6) seem small for having to move such a large amount of fluid quickly.

Speaking of what is the rated GPM @ 12v for that pump, I speculated 1.5-2

Do any of the "pros" use engine driven pumps at this level?
These smaller arenas are really dependent on rear steer it seems.

 

[gt1guy]

If I won the lotto I don't think I could pull off what he's done

Sure you could. Just starts with handing Mr. Skipped Link a big check.

 

[WaterH]

Sure you could. Just starts with handing Mr. Skipped Link a big check.

That might get me the truck, but now I have to learn to drive.

 

[gt1guy]

That might get me the truck, but now I have to learn to drive.

Foot to the floor and try to postpone the crash as long as possible.

 

[Skipped_Link]

So how would you accomplish this? Some kind of transformer? Just another battery. I suppose you can charge a battery for each show.

My plan is to use a series-parallel relay, similar to what would be used on an old semi truck before they made 12 volt starters that would crank a big diesel,
In those trucks everything is 12 volt, except the starter,
I’ll get more in depth in how I’m going to wire it when that time comes, but here is a schematic for said relay/switch.

Would upping the steering hose size from -6 to -8 increase the flow/speed? Those hoses (-6) seem small for having to move such a large amount of fluid quickly.

Not at 12 volts, the #6 hose is plenty for the volume of the pump at that speed,
We’ll see if doubling the voltage increases the flow enough to be restricted by the #6 hose.

Speaking of what is the rated GPM @ 12v for that pump, I speculated 1.5-2

Do any of the "pros" use engine driven pumps at this level?
These smaller arenas are really dependent on rear steer it seems.

I may have documentation on the GPM of this pump, I’ll see if I can come up with that number.

The vast majority of trucks run an engine driven pump for the front, but I don’t know that any do for the rear steer.

 

[woods]

nothing like building a legit monster truck and taking it monster truckin. Badass

I'm curious how something like that would do on "trails" and stuff. Like, legit offroading.

 

[Frodo]

I'm curious how something like that would do on "trails" and stuff. Like, legit offroading.

Where I am it would suck. The trails are are tight for my friend with a f250 on 44s. A monster truck just wouldn't fit.

 

[SLOWPOKE693]

I may have documentation on the GPM of this pump, I’ll see if I can come up with that number.

The vast majority of trucks run an engine driven pump for the front, but I don’t know that any do for the rear steer.

What are the other trucks with quick rear steer running for an electric pump?

 

[SLOWPOKE693]

How long before a new or modified chassis and fiberglass body come along? I would hate to ruin such a nice chassis/body doing monster truck things with it. I would also assume once the tricks and jumps get bigger you are going to want more cage around you like the MJ truck chassis have.

If/When you roll this truck I think 99% of us here on IBB are going to cry.