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Beerman's RcBros Berg build (update on page 7)
- Thread starter Beerman Crawler
- Start date
CrawlrKing
Rock Crawler
Efficient !
Beerman Crawler
Quarry Creeper
Had a great day crawling and looks like I get to crawl tomorrow as will. The weather was nice and the traction was great.
A crazy side hill shot
A crazy side hill shot
Beerman Crawler
Quarry Creeper
I have been working on this climb for the last few years. I've never seen any crawler ever make it. This is the first time I've ever seen it done. I'm glad to say it was me, done with the RcBro chassis. The chassis and the narrowed Voodoo gold tires makes for a great combination. I really wish the camera would truly justify the angles and how steep this climb is.
http://youtu.be/smLyn8c1TIM
http://youtu.be/smLyn8c1TIM
Beerman Crawler
Quarry Creeper
Got out for nice day of crawling, shot a short video clip along with some photos.
In the video it's a double step up climb
http://youtu.be/-ngY3Aqd8BU
In the video it's a double step up climb
http://youtu.be/-ngY3Aqd8BU
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Beerman Crawler
Quarry Creeper
I have a question about geometry I'm hoping someone could help me out with. The upper link mounting holes on the chassis you have the vertical holes and horizontal holes. When you move the upper links up the vertical holes that gives you squat, when you move the holes towards the ground that gives you anti squat. So my question is what does the horizontal holes play into relationship to the geometry, besides adjusting your front caster.
Hey JB, I don't claim to be an expert. However when we cut our link mounts I spoke with alot of people about geometry changes, and at the time I wrote it all down (my brain can't retain it) Here is what I have written down in our 4 link product page.
Link Lengths:
The upper link length controls the axle clocking, the longer the link the more the axle clock will increase with suspension travel, assuming your uppers are longer than the lowers. Since we don’t have pinions, it keeps the motor up and out of the way. The truck does feel more predictable with long upper links as it provides less movement in the axle and reduces the amount of clocking that can occur when compressed. A shorter link will do quite the opposite.
Vertical Seperation:
Shortening the vertical separation (distane between) between the uppers & lowers on the frame mount side will increase Anti Squat (rear rises) while increasing the vertical separation will do the opposite. This is assuming all else remains the same.
What is Anti Squat?:
When a crawler accelerates, the weight shifts rearward. The higher the weight is above the ground, the greater the shift off the front and onto the rear will occur. This extra weight will compress the rear suspension, making it SQUAT. But there is also a torque on the rear axle, equal and opposite of the tire torque. The axle will try to rotate upward. The links resist this torque by putting forces into the frame. These forces may try to lift upward. The upward force will cancel some of the squat from the weight shift, euqally ANTI-SQUAT.
Link Lengths:
The upper link length controls the axle clocking, the longer the link the more the axle clock will increase with suspension travel, assuming your uppers are longer than the lowers. Since we don’t have pinions, it keeps the motor up and out of the way. The truck does feel more predictable with long upper links as it provides less movement in the axle and reduces the amount of clocking that can occur when compressed. A shorter link will do quite the opposite.
Vertical Seperation:
Shortening the vertical separation (distane between) between the uppers & lowers on the frame mount side will increase Anti Squat (rear rises) while increasing the vertical separation will do the opposite. This is assuming all else remains the same.
What is Anti Squat?:
When a crawler accelerates, the weight shifts rearward. The higher the weight is above the ground, the greater the shift off the front and onto the rear will occur. This extra weight will compress the rear suspension, making it SQUAT. But there is also a torque on the rear axle, equal and opposite of the tire torque. The axle will try to rotate upward. The links resist this torque by putting forces into the frame. These forces may try to lift upward. The upward force will cancel some of the squat from the weight shift, euqally ANTI-SQUAT.
This thing is to much fun to drive! Got a chance to drive this the other day and its awesome! Especially coming from the scale crawler world. Can't wait to get my hands on one. Wish i could see the for sale section already! AWESOME build thread JB.
JARED
JARED
Beerman Crawler
Quarry Creeper
Glad you had a good time driving the crawler. You're going to get a lot of great information from reading these forms. Feel free to ask all the questions you want.
I sent you a PM on Facebook. I was not sure the best way to contact you. I would really like to get my hands on a RC bro chassis to start my build. I'll shoot you a PM on here.
redsawacs
RCC Addict
Re: Beerman's Berg: RcBro/ Secret Agent Chassis
what chassis is that?!?!?!? LOVE THE LINES....or lack of!!!
I am trying some black ice beadlocks out right now with my SLW's and I am liking them a lot so far."thumbsup"
what chassis is that?!?!?!? LOVE THE LINES....or lack of!!!
Beerman Crawler
Quarry Creeper
I've been really happy with the results that I've achieved with the tuning that I've done with my crawler. I truly believe I'm at the point where I'm at my final rough draft. So I started ordering last few parts I wanted, and I must say they are some nice parts. I've been in contact with Chris with creation fab and wanted him to make me custom-made skid plate to the dimensions of my desire. Chris was a great guy to work with, I ended up with exactly what I wanted. The reason for wanting a smaller skid over what came with the RC bro chassis was to give me more room to mount my electronics behind my motor. I also like to run longer front lower links. So over the next few weeks I'll be updating my build thread slowly with the new parts like a servo, motors, new front upper and lower links, and this custom-made skid. Here's some pictures to show off the great work Chris did for me.
The dimensions of the skid that I had Chris make
The size difference in the skids between the stock one on the left and the skid on the right that Chris made for me.
The dimensions of the skid that I had Chris make
The size difference in the skids between the stock one on the left and the skid on the right that Chris made for me.
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Beerman Crawler
Quarry Creeper
Pure sexy.
Beerman Crawler
Quarry Creeper
Ha, the best part it's already polish.
Crawllife
Fifth dimension
Is it direct fit into Will's servo mount? It is purdy!!
Beerman Crawler
Quarry Creeper
It's the same size as a 7950 but a few grams less.
sourdojack
Rock Crawler
I keep forgetting to post the updates to Jaybe's Berg. So here ya go!
Chris the Battery Man made up that shortened Delrin skid plate, so I modded the chassis to fit it. By the way, I HIGHLY recommend wearing gloves and a dust mask when working with carbon!
Chris the Battery Man made up that shortened Delrin skid plate, so I modded the chassis to fit it. By the way, I HIGHLY recommend wearing gloves and a dust mask when working with carbon!
