home build : solid axles monster truck using 1/8 transmission
#136
cool post man, nice to see our common love of imagining and building rigid axles monster trucks !
here a shema ( cut view ) of my steel arms. the screw is tightened to the chassis. see how i drilled the hole in the steel arm : it's not a straight hole
rod : i use the piano wire i found here. 5mm diameter. that the most durable stuff i have. i have nothing else ! steel tube from the harware store here are basic steel and fragile...
while i wait for parts :
i jumped my eb48.
notice that it broke the front shock tower
fakie double backflip
here a shema ( cut view ) of my steel arms. the screw is tightened to the chassis. see how i drilled the hole in the steel arm : it's not a straight hole
rod : i use the piano wire i found here. 5mm diameter. that the most durable stuff i have. i have nothing else ! steel tube from the harware store here are basic steel and fragile...
while i wait for parts :
i jumped my eb48.
notice that it broke the front shock tower
fakie double backflip
Last edited by werner sline; 10-19-2017 at 01:05 PM.
#137
not a monster truck, but anyway :
<iframe width="560" height="315" src="https://www.youtube.com/embed/zHFDf3oXnpU" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/zHFDf3oXnpU" frameborder="0" allowfullscreen></iframe>
Last edited by werner sline; 10-24-2017 at 03:15 PM.
#138
time to step up the game
i broke 4 pcs of those steering knuckles. which is easy to understand as a rigid axles puts a lot of stress on the steering
so, a special truck requires special solutions : i can't build ball bearing carrier myself so i let them turned by a professional and i shaved them off a bit ( step 1 )
then i welded the upper and lower plates ( step 2 ) and used a 4mm bolt to hold them in the right position
finally some shaving and paint, even if it doesn't look perfect, it should be unbreakable
of course this added some weight. original part is 18 gr. steel part is 55gr. so about 160gr will be added on this 6 Kg truck, which is OK.
the rear axle is finished. i took off the rear steering ( but could put it back ) and kept the servo saver. this bring extra durability. i put a REDCAT 1/5 servo save that i cut down a bit. so it's no more a servo saver, it's more like a rim saver !
UNIQUE TRUCK, UNIQUE SOLUTIONS
i broke 4 pcs of those steering knuckles. which is easy to understand as a rigid axles puts a lot of stress on the steering
so, a special truck requires special solutions : i can't build ball bearing carrier myself so i let them turned by a professional and i shaved them off a bit ( step 1 )
then i welded the upper and lower plates ( step 2 ) and used a 4mm bolt to hold them in the right position
finally some shaving and paint, even if it doesn't look perfect, it should be unbreakable
of course this added some weight. original part is 18 gr. steel part is 55gr. so about 160gr will be added on this 6 Kg truck, which is OK.
the rear axle is finished. i took off the rear steering ( but could put it back ) and kept the servo saver. this bring extra durability. i put a REDCAT 1/5 servo save that i cut down a bit. so it's no more a servo saver, it's more like a rim saver !
UNIQUE TRUCK, UNIQUE SOLUTIONS
#139
i went back to some buggy action. a monster truck couldn't do that ( but a truggy can do a 360° cork )
<iframe width="560" height="315" src="https://www.youtube.com/embed/IN29rSJOFdI" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="https://www.youtube.com/embed/IN29rSJOFdI" frameborder="0" allowfullscreen></iframe>
#140
the center motor block can be taken out with 5 screw ( all 4mm diameter )
you got a better view of the suspension links and their rubber shock absorbers
you got a better view of the suspension links and their rubber shock absorbers
#141
it's time to jump this 13.25 Lbs truck again :
<iframe width="560" height="315" src="https://www.youtube.com/embed/2orIJodPZQ8" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
new pictures :
<iframe width="560" height="315" src="https://www.youtube.com/embed/2orIJodPZQ8" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
new pictures :
Last edited by werner sline; 12-11-2017 at 08:41 PM.
#142
what colour should be a nero ? well blacko !
#143
got to reload the pictures, thanks photobucket !
I welded the new axle around the migen mbx 7r eco diff box. no schema, i just started to cut and weld ! i 'm not patient enough to draw a shema !
i started with a square 20x20mm tube. thickness 1.5mm.
I surround the mugen mbx diff box and mimics the real monster trucks axles.
it's heavy, but this time weight doesn't matter as much. the lower folded plate is 2mm thick
here the process:
i added a "hat" for more realism
<iframe width="560" height="315" src="https://www.youtube.com/embed/B8OrdM7lHb4" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
I welded the new axle around the migen mbx 7r eco diff box. no schema, i just started to cut and weld ! i 'm not patient enough to draw a shema !
i started with a square 20x20mm tube. thickness 1.5mm.
I surround the mugen mbx diff box and mimics the real monster trucks axles.
it's heavy, but this time weight doesn't matter as much. the lower folded plate is 2mm thick
here the process:
i added a "hat" for more realism
<iframe width="560" height="315" src="https://www.youtube.com/embed/B8OrdM7lHb4" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
Last edited by werner sline; 12-16-2017 at 08:41 PM.
#144
some nice little jump with this concrete block and a mini wooden ramp
<iframe width="560" height="315" src="https://www.youtube.com/embed/YFFbPvPjbn8" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
the next video will show this :
the truck is complete warped in the air by a quadruple backflip ! yes 4 turns in the air with a solid axle truck ! it landed and survived without breaking !! and continued right after that to jump again and again !
the video of how i managed this will come soon
<iframe width="560" height="315" src="https://www.youtube.com/embed/YFFbPvPjbn8" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
the next video will show this :
the truck is complete warped in the air by a quadruple backflip ! yes 4 turns in the air with a solid axle truck ! it landed and survived without breaking !! and continued right after that to jump again and again !
the video of how i managed this will come soon
Last edited by werner sline; 12-22-2017 at 04:30 PM.
#145
the video of the pic shown before ; a bit more violent flips.
just to be clear : my video show a REAL quadruple backflip. because for some folks, quadruple backflip mean 4 backflips in a row. i've been fooled more than once on such clickbaits ! mister T doesn't approve !! it's 4 flips IN THE SAME JUMP ! lol
<iframe width="560" height="315" src="https://www.youtube.com/embed/SAOMhouGzv8" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
just to be clear : my video show a REAL quadruple backflip. because for some folks, quadruple backflip mean 4 backflips in a row. i've been fooled more than once on such clickbaits ! mister T doesn't approve !! it's 4 flips IN THE SAME JUMP ! lol
<iframe width="560" height="315" src="https://www.youtube.com/embed/SAOMhouGzv8" frameborder="0" gesture="media" allow="encrypted-media" allowfullscreen></iframe>
Last edited by werner sline; 12-31-2017 at 03:15 PM.
#146
some pics that may inspires some home made monster truck LOVER out there !
i didn't make any schema for any of my projects ! because i like the touch the things, try to place the parts and imagine how parts would move. i love to make my brain work for little cynematics like that ; and actually it includes multiple aspects : will the universal joint stay in the center diff ? what is the exact suspension travel ? will the servo touch the arms or the chassis ? what if the truck crashes sideways ? how will the servo saver move ? how will the lower arms look good sideways ?
you see, there are some many questions and because each project is very unique, you got to start from scratch each time. you can just copy because it is impossible to have the exact same truck !
anyway, keep on imagining what parts you will use and how to get things working !
this truck and the previous were pure joy to imagine and built. there were some fails like bad ideas or parts i didn't use more than 1 minute ! but hey that's how you learn and get better at it. for example, for this truck i first imagine a double suspension to reach 90mm suspension travel : i built it, and it worked ok : but i didn't keep this idea because it was too heavy ( like 400gr added weight ) and it wasn't durable. they are some incredibly high load on RC's in certain area ! so sometimes you got to change and adapt your ideas.
parts i used :
- mugen mbx7r eco front and rear diffs ( approx 100 000 cst oil in them ) + mugen mbx7r eco center diff with a steel spur gear ( 300 000 cst oil in it )
- mugen mbx7t CVD from front and rear diffs to center diff ( long CVDs so that i got a 40cm wheelbase )
- from the diffs to the wheels : i use shortened unversals left from the hobao hyper mt when i upgraded the parts. i shortened and reweld them
- i now use a castle creation 2200kv motor with a 11T on my homemade motor mount . still 4s
- i now use a hobbyking trackstar 150a esc with a cheap hobbyking radio. works great
i didn't make any schema for any of my projects ! because i like the touch the things, try to place the parts and imagine how parts would move. i love to make my brain work for little cynematics like that ; and actually it includes multiple aspects : will the universal joint stay in the center diff ? what is the exact suspension travel ? will the servo touch the arms or the chassis ? what if the truck crashes sideways ? how will the servo saver move ? how will the lower arms look good sideways ?
you see, there are some many questions and because each project is very unique, you got to start from scratch each time. you can just copy because it is impossible to have the exact same truck !
anyway, keep on imagining what parts you will use and how to get things working !
this truck and the previous were pure joy to imagine and built. there were some fails like bad ideas or parts i didn't use more than 1 minute ! but hey that's how you learn and get better at it. for example, for this truck i first imagine a double suspension to reach 90mm suspension travel : i built it, and it worked ok : but i didn't keep this idea because it was too heavy ( like 400gr added weight ) and it wasn't durable. they are some incredibly high load on RC's in certain area ! so sometimes you got to change and adapt your ideas.
parts i used :
- mugen mbx7r eco front and rear diffs ( approx 100 000 cst oil in them ) + mugen mbx7r eco center diff with a steel spur gear ( 300 000 cst oil in it )
- mugen mbx7t CVD from front and rear diffs to center diff ( long CVDs so that i got a 40cm wheelbase )
- from the diffs to the wheels : i use shortened unversals left from the hobao hyper mt when i upgraded the parts. i shortened and reweld them
- i now use a castle creation 2200kv motor with a 11T on my homemade motor mount . still 4s
- i now use a hobbyking trackstar 150a esc with a cheap hobbyking radio. works great
Last edited by werner sline; 12-31-2017 at 03:37 PM.
#148
i made my first welding with the aim to build a steel axle ! i trained on tables and various little build for ma family and my work
i made a couple of home made monster truck that i made better each time
i think i now have a good truck, just like i wanted : durable and realistic ( mostly with a narrow axle so that the tires are close, just like the real monster trucks )
i do have to repair the shocks sometimes but i keep them because they look realistic
i could be big bore shocks with 5 mm shafts but i wouldn't look nice...
anyway, the last video about the tilting block trick :
https://youtu.be/vyr69kW75Os
<iframe width="560" height="315" src="https://www.youtube.com/embed/vyr69kW75Os" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
notice that it is the same tilting ramp method and effect here :
<iframe width="560" height="315" src="https://www.youtube.com/embed/QcdaYgOVI3M" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
#149
monster attack :
https://youtu.be/n01cY5Db_XU
<iframe width="560" height="315" src="https://www.youtube.com/embed/n01cY5Db_XU" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
a old picture of the gen 2, cool and nasty looking
https://youtu.be/n01cY5Db_XU
<iframe width="560" height="315" src="https://www.youtube.com/embed/n01cY5Db_XU" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
a old picture of the gen 2, cool and nasty looking
#150
<iframe width="560" height="315" src="https://www.youtube.com/embed/w9TIb-a0EdE" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>