DH Lift | Dropped deck | Ronin cast trucks | Hub motor | Backpack drive | Backpack Battery

ESK8 Builds
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26

That will skip like crazy, donā€™t go lower than 14. Get a 38-40 on the wheel instead

27

Hi, If I should suggest you a setup with parts I should use these parts:

This will give you a max speed of 35km/h by 4500W max power.

If you find a suitable motor mount you can choose the belts and stuff, I know @whitepony has a motor mount for Ronin trucks on his awesome build. But thereā€™s one major problem, I donā€™t think you got enough space to put 2 of these motors on one truck. maybe with smaller beltsā€¦ Or you can just buy a kit from DIY and just unscrew the trucks every time you go uphill :smiley:

1 Like
28

No, the solution is basically :

  • climbing uphill (5 km / 8%) with a motor drive mounted on my Ronin cast trucks (at minimum 20 km/h ),
  • then remove the battery and e-wheels and put them in my backpack,
  • then ride downhill with my dh wheels (DTC Ray SETAE 72 mm) and the motor disconnected (in other words : just pure gravity based acceleration/braking and no motor based accelaration/braking),
  • no trucks or any objects harder than my back + back protector in the backpack for safety reason in case of dh crash on the back.
29

Ahhhh. But youā€™re going to be carrying around at least a battery in that backpack. Thatā€™s like the worst thing to fall on.

2 Likes
30

I read this dimensions/weight for this battery pack : Cell Weight: 114g Cell Size: 128 x 42 x 10mm

According to their weight, if we put only 5 cells below the deck it increases the board of 500g and itā€™s a good compromise to avoid the backpackā€¦ Do you have an expectation of the ā€œvery min and max rangeā€ that can be done at 20 km/h and 8% with 5 cells ? maybe the only answer is ā€œletā€™s try !ā€ :wink:

31

Wait you wanne make a 5S battery pack instead of a 12S pack? Because if you do that the max power will decrease sooo much like max 2000W instead of 4500W. If you wanna go for less cells under your deck 6S is a lot used. it will have not as much power as a 12S pack because itā€™s half the voltage but the weight will be less thatā€™s true. But them you can chose other ESC which are a lot cheaper and the max topspeed will be lower which is better. I will make a list if you want ;;

32

oh no forget it ! as a newbie I misconfused the packs and cells sorryā€¦ But yes comparing the two version 6S and 12S is interesting. Basically, if less powerful (6S) means less speed, less range but also less heat so more chance that nothing burns, Iā€™d preferā€¦ By the way, Iā€™ve asked to the DIY for their mechanical mounts vs my Ronin trucks but no answer yetā€¦

1 Like
33

If Iā€™m not wrong the smaller battery will produce more heat. The motors will pull more current due to the lower voltage. I donā€™t think anyone has any mounts for ronins yet. There are some guys who have modified their ronins to fit a mount though.

34

Yeah a 6S battery will no problem to use. Because right now the build is getting a bit too extreme. A dual motor setup on 6S batterie will stil give you like max 4000W and with a max speed of 30kmh that will really be no problem :wink: You could use these:

35

You need a pusher that can attach to the back of the board. Probably around the truck. Maybe a quick release to attach it. No changing wheels / trucks. The batt/esc is in the pusher. 1 motor geared for torque. Might be a bit heavy in the backpack, but the battery could be protected. I dunno :disappointed: - just thinking.

36

Or how about something like this? The range seems really short though. http://www.riserobotics.com/kickstick/

37

my advice would be to use your downhill board for down hill and get a separate electric board for flat ground.

there is no way you can have the best of both worlds. there is always a compromise.

38

Why not trying to mix :

  • the pusher ideas of @SageTX and @LaCha with the SK8-Booster dedicated e-wheel/truck concept, but with the e-wheel that could be put down to the ground to climb up the hill, and moved up, may be through the deck (in the middle) to go dh,
  • with a pluggable/unpluggable battery packs.
  • and that respect in a way the advice of @lowGuido : donā€™t try to integrate the dh and ā€œeā€ setups !

OMG, the phone will ring and I will wake up soon :wink:

To avoid carry the battery pack in a backpack to save weight in the board while dh and preserve safety and damage in case of crash, one can purchase for several lower range packs (5 km each) store them down the hill, and leave them up the hill. After 4/5 dh runs : take your car, go up the hill and bring back the packs down the hill, and redo 4/5 runsā€¦ Ok : one need a car, but dh people are used to use their car up and down all the timeā€¦they just will do it less with such a dh lift which is good for the planet,and much more cool as being (only) 5 big guys in a small car in leather suits with protections and your big board is not always so fun, especially for the owner of the car (or his/her parents) :wink: I fear I still havenā€™t wake up :wink:

39

@LaCha : the KickStick could have been a solution, but the project seems not live anymore. Some times ago, I also looked for this one, but no commercial version yet.

40

It looks like something you can make though! Probably less to worry about compared to an eskate.

41

Get a drone that will follow and video your downhill runs and also carry your batteries to the bottom of the hill. Then strap the batteries to your board and the drone to your back for the ride back up to conserve itā€™s battery, rinse and repeat. Sure, you might need a ridiculously large and expensive drone that could accomplish this, and sure it might be seen by some as a potential flying bomb, but thatā€™s the price of progress, I guess.

42

i would either make an eboard that is quick enough to be proper fast up AND downhill (that would require a really strong setup though), or Id have a small electric board in my backpack to have an undiluted downhill experience. if its just a lift for you, it could be a tiny single motor board with short gearing for 20kph max and an enduring liion battery (best energy / weight). a board like that weights about 5-6kg with 350ish Wh and small wheels!

my and other builders small jet spud might be the one: https://www.electric-skateboard.builders/t/carbon-jet-spud-freebord-bindings-single-vesc-10s3p-lg-hg2/5805

43

Thankā€™s for your feedback and your ā€œreferenceā€ built ! Yet, having a board in my backpack is not possible for safety reason.

After reading again on esc vs vesc and discussing with Dexter from http:// about their upcoming hub motor version, the target of 5 km at 8% for my 180 lbs seems ok for him. I will still have to machine a little bit my Ronin cast trucks sothat these hub wheels fitā€¦Iā€™m looking at that for now and will post the part list he suggests in cas youā€™ve got any feedbacks.

44

What about this?

45

Thankā€™s for this link, itā€™s a quiet good alternative (the ā€œpusherā€ one as @SageTX suggested here ). Iā€™ve looked at this review of this device and the truck drive seems quiet heavy when the guy takes it in his hand (1:40). Iā€™ve looked also at this video of the people making this device and they are dh riders, yet they never use it as a ā€œdh liftā€ for their dh session, which is exactly what I want to doā€¦ So I fear climbing hill is not really in the target program of this device (too heavy to dh with it at the rear, too risky to have it in your backpackā€¦). But for a lighter ā€œthird power truckā€ solution, one could try to replace this ā€œnot light enoughā€ adaptative truck by a composition of lighter gbomb drop bracket and torsion tail. One still need to tighten the drop bracket to the rear of the deck (at the top), but it should not be a big party. And to go dh, removing the power wheels should be the only action to do : leaving the bracket asis without the wheels should not cause any problem during the dh run as they are light enough and wonā€™t touch the ground.