Bruder D11

[motocrawler]

I've had the new Bruder D11 model sitting on the shelf for a while and finally I had enough time to tackle the conversion. I have to say that the level of detail on this model is quite impressive and the plastic is quite beefy...it's almost like Bruder knows these are going to be used for conversions.

I am using Pololu 99:1 geared motor as my drives and at 7.2v it should produce about 200 oz/in torque per motor.
First I made an axle to connect the motor to the drive wheel and hub.

[tc1cat]

Promising start!! Keep the pics coming Will be watching this conversion

[rc_farmer]

Those motors will work but the speed to toque ratio is very high. Reducing the voltage down to 7.4 will cut the speed but also will cut the torque rating too........ something around 150:1 would be much more suitable......if you have access to those motor.....don't want to discourage you, but wanted to let you now before you buttoned everything up.

[RCP57]

It's going to be a fast dozer! Those motors are 100rpm at 6v. I like how you have them set up though.

[motocrawler]

I agree the dozer will not be to scale speed but I had these motors kicking around so I figured I would use them. I can always adjust the EPA's on my radio to scale the speed back. Plus I have so much rc stuff from years of racing and building etc that I told myself that I will use what I have and not buy more stuff (let's see how long that lasts...). More pics and progress coming soon.

[motocrawler]

So I got to working on the blade lift. I decided to use servos tucked into what would be the track tensioner.





I had to make a sliding mount for the servo horn to mount to. This was made with styrene and slides in the angle styrene brackets.

[kaptain Jack]

Looking good.Have you tested the range of motion? Is the servo strong enough?

[baker3]

I thought about mounting a similar blade setup like that but ended up going with screwdrive type rams. Interested to see how that works out!

[motocrawler]

Originally Posted by kaptain Jack

Looking good.Have you tested the range of motion? Is the servo strong enough?

The range of motion is perfect, it travels exactly to the physical stops/limits on the model. I am using metal gear servos on each side so it is plenty strong it has an approximate combined torque of almost 100 oz/in.

[motocrawler]

I didn't like how the tracks had no rollers/bogies so I cut out the faux rollers and made some rollers.

[motocrawler]

I used a metal gear servo for the blade tilt







From there I added some LED's

[motocrawler]

Here is a shot of the guts, the semi circle pieces are wheel weights I had kicking around from 2.2" proline tires, they are zap strapped together and held down with heavy duty double sided tape. I need to put it on a scale but with the battery in it definitely has some weight behind it now.

[motocrawler]

So I got the dozer almost done. I decided not to automate the ripper as I have my doubts about the tracks holding up to the strain of ripping. I want to test it first and perhaps add some different grousers. I need to make the orange flashers and clean up some wiring and painting/weathering and it will be fully done. In the meantime here are some almost finished photos.

[motocrawler]

Here is a test video of it. Just need the monsoon rains we are getting in Vancouver to subside so I can get some actual working footage of it in the dirt.

[Mikeo78]

Looks great! Nice job. Can't wait to see it push! 👍

[baker3]

Nice job! I want to put some LEDs on mine but am clueless as to how and where to get them.

[motocrawler]

Originally Posted by Mikeo78

Looks great! Nice job. Can't wait to see it push! 👍

Thanks so much! Just need some decent weather so I can ge this thing out.

Originally Posted by baker3

Nice job! I want to put some LEDs on mine but am clueless as to how and where to get them.

Most hobby stores carry LED light kits, I find the E flite kits work well to get the desired affect. But on these custom conversions I just end up making my own LED's.

[kaptain Jack]

Nice job,I wish we had rain instead of -25c

[longhairRandy]

Great build! Any video of it moving dirt/rubber yet?

[Stuff]

looks really great! well done!