I am prepping my fcx24 unimog for a competition. I will be removing items that add weight to the unimog Grab a fcx24 here www.fmshobby.com/?ref=jacob_r...
Making a trail rig a comp rig! This is not an easy task for this one. I don't like laying down shocks because the suspension geometry is compromised, rather i prefer to leave shocks more upright and change the shock size and/or shock spring length, combined with limiting straps/bands. A good example of this is the popular yet flawed practice of laying down shocks to often even horizontal positions and removing the springs which severely hinders traction response and changes shock performance throughout the travel. Many people will lay down their shocks, and expect that rubber bands will fix the flop, but it doesn't really fix it, and if it does then it has lost the benefit of springs. Proper oil shocks with springs are essential for great traction. This is a tough one. Heavy body, high CG, poor turning radius. Looking at the specs, it's quite wide. This has pros and cons, obviously. 142mm, is that the width from edge to edge of the tires? Ive been wondering about these axles. It's too bad that they reverse the rear axle rotation (iirc), and so we can't put on some X15 with wideners and offset wheels? I've been thinking about buying one of these bodies to throw on a tow-rig, with flatbed, gladiator chassis rails, scx24 trans, and X15 axles. I'm not sure the problems I'll face. Thank you for the video. I'm really interested to see it in action during the comp!
@@MrsRabbit8 I have done a little bit of testing on my rock pile and out in the wild with this set up and off the bat it definitely needs some better wheels and tires these little guy trench kings are not my favorite but it’s what I had on hand when a I took it out of the box new. I know exactly what you mean about laying the shocks down it is not a actual improvement and is a little bit of a hindrance but this chassis is very limited on placement so I’m working with what I have as I don’t want to go crazy and put a lcg and brushless set up
I would expect tyre rub to cause a fairly serious reduction in performance, with regard to power loss, reduction of axle articulation and reduced steering angle. I am also thinking that suspension droop relates directly to articulation which relates directly to traction and consequently reducing it will impair performance. It seems that in your effort to lower the centre of gravity you have reduced the suspension travel and the ground clearance, causing further loss of performance. Weight reduction is almost always a good thing though...
I see where you’re coming from and understand what you mean but the way I have the suspension set up with the rubber bands acting as limiting straps. The suspension travel is about the same as it was before. With RC car crawling you don’t particularly want to have a whole lot of suspension articulation because it could hinder performance even on a very flat uneven surface. You could potentially roll over. The Fcx24 main downfall is its turning radius so even with the end points setting maxxed it still doesn’t turn the greatest. Now, does this truck need more weight down low oh for sure. It definitely needs better wheels and tires and possibly some brass on the axle. I just haven’t got that far. I was trying to do it as efficiently as possible without adding a bunch of parts.
@@jacob_rc_nerd thanks for the reply. I guess an increase in track width would bring great improvements but I presume not so easily achieved. At the end of the day, it's all about choosing your compromises I suppose - everything is a trade off against something else... and then different terrain and conditions need different compromises.
Unimogs are making a comeback. This fcx24 is nice. 🔥👍🏾
unimog is awesome 👌 👍👍subscribed 😀👍
Making a trail rig a comp rig! This is not an easy task for this one.
I don't like laying down shocks because the suspension geometry is compromised, rather i prefer to leave shocks more upright and change the shock size and/or shock spring length, combined with limiting straps/bands.
A good example of this is the popular yet flawed practice of laying down shocks to often even horizontal positions and removing the springs which severely hinders traction response and changes shock performance throughout the travel.
Many people will lay down their shocks, and expect that rubber bands will fix the flop, but it doesn't really fix it, and if it does then it has lost the benefit of springs. Proper oil shocks with springs are essential for great traction.
This is a tough one. Heavy body, high CG, poor turning radius.
Looking at the specs, it's quite wide. This has pros and cons, obviously.
142mm, is that the width from edge to edge of the tires?
Ive been wondering about these axles.
It's too bad that they reverse the rear axle rotation (iirc), and so we can't put on some X15 with wideners and offset wheels?
I've been thinking about buying one of these bodies to throw on a tow-rig, with flatbed, gladiator chassis rails, scx24 trans, and X15 axles.
I'm not sure the problems I'll face.
Thank you for the video.
I'm really interested to see it in action during the comp!
@@MrsRabbit8 I have done a little bit of testing on my rock pile and out in the wild with this set up and off the bat it definitely needs some better wheels and tires these little guy trench kings are not my favorite but it’s what I had on hand when a I took it out of the box new. I know exactly what you mean about laying the shocks down it is not a actual improvement and is a little bit of a hindrance but this chassis is very limited on placement so I’m working with what I have as I don’t want to go crazy and put a lcg and brushless set up
I would expect tyre rub to cause a fairly serious reduction in performance, with regard to power loss, reduction of axle articulation and reduced steering angle. I am also thinking that suspension droop relates directly to articulation which relates directly to traction and consequently reducing it will impair performance. It seems that in your effort to lower the centre of gravity you have reduced the suspension travel and the ground clearance, causing further loss of performance.
Weight reduction is almost always a good thing though...
I see where you’re coming from and understand what you mean but the way I have the suspension set up with the rubber bands acting as limiting straps. The suspension travel is about the same as it was before. With RC car crawling you don’t particularly want to have a whole lot of suspension articulation because it could hinder performance even on a very flat uneven surface. You could potentially roll over. The Fcx24 main downfall is its turning radius so even with the end points setting maxxed it still doesn’t turn the greatest. Now, does this truck need more weight down low oh for sure. It definitely needs better wheels and tires and possibly some brass on the axle. I just haven’t got that far. I was trying to do it as efficiently as possible without adding a bunch of parts.
@@jacob_rc_nerd thanks for the reply. I guess an increase in track width would bring great improvements but I presume not so easily achieved. At the end of the day, it's all about choosing your compromises I suppose - everything is a trade off against something else... and then different terrain and conditions need different compromises.