Beach Buggy

[grindinggears]

It has been some time since my last model so here is one that I finished some time (exactly one year) ago.

It's a Beach Buggy with huge tires:

I wanted to use a very simple design with only few gears which is similar to the 8297 Offroader. Having finished the drivetrain and the basic chassis I had some time to do bodywork and some interior.

The Buggy uses one PF M-Motor for steering and one XL-Motor for powering the rear axle. Both are remote controlled and the battery box is easily exchangeable.

One major problem was the torque at the differential which broke two 12-tooth gears and weared out the differential.

Still it was a nice build and I am quite happy with the result.

I'd really like to hear your opinion so feel free to comment!

You can find additional information on my BLOG

and there is also a German version

You can find the yet to be moderated Brickshelf gallery here

grindinggears

[Crtlego]

Nice!! I really like the look of the buggy. It looks so rugged and probably is. I particularly liked the use of the large offroader tires. They are awesome!

One major problem was the torque at the differential which broke two 12-tooth gears and weared out the differential.

I have had a similar problem with several of my differentials and have had to order back-ups.. Just curious.. Which version of the differential are you using? Are you using new ones like the one in the 8297 or the older ones?

[Milan]

You need to make some kind of hub-reduction, or another stage of gear reduction after differential.

I had the same problem on my JCB backhoe with power puller tires, and that solved it.

[grindinggears]

It looks so rugged and probably is. I particularly liked the use of the large offroader tires.

Yes it's really robust and I enjoyed letting it fall down a bit. The sound of the tires is pretty cool then 8-)

I actually designed it for these "little" wheels but it looked really out of proportion and I didn't have the 8297 wheels. So I chose my good old 8466ers and I was amazed how big the steering lock actually can be although the steered axle is even 2 studs narrower than the rear axle.

I have had a similar problem with several of my differentials and have had to order back-ups.. Just curious.. Which version of the differential are you using? Are you using new ones like the one in the 8297 or the older ones?

You need to make some kind of hub-reduction, or another stage of gear reduction after differential.

I had the same problem on my JCB backhoe with power puller tires, and that solved it.

I was using the new differential inside this frame and transferred the torque without any further reduction to the wheels. This was of course a mistake and I have learned my lesson from that and I will use more gear reduction in every future model with big wheels, the standard Lego parts for suspension and transferring the motion to the wheels are simply unsuitable for anything than flat ground.

@Milan I already made an attempt of hub reduction a bit earlier in my first Trialtruck:

and I just didn't use it to reduce building time of the Beach Buggy.

BTW: more pictures of the Buggy are available in the gallery on my blog