Suck down winch?

[Jefferson87]

I've searched and searched, can't find anything on here. You guys call them something different?

I want to add one to my capra and if it works well some longer shocks for more droop when I get hung on the belly.

Who all is running one?

 

[HumboldtEF]

Winch down or suck down winch is what I hear them called most often.

I put one on a rig a few years ago, I just took the guts out of an RC4WD winch and 3D printed a mount in a crossmember.

pics in post 1 here:

Thread 'Venduro X4.2 Dumpster fire build'

Jul 17, 2020

From my giant pile of spare parts I've been assembling an unholy abomination that I've coined the Venduro (X4.2)


HPI Venture chassis rails, Element Enduro Axles and links, Axial SCX10.2 skid and kit tranny, TRX4 shocks with Enduro springs, Junfac drive shafts (front is too short but working)


I ordered up UCFab's Enduro servo on axle mount to make the steering simple, plus I dont have any servo on axle setups on 1.9"s so this will be a nice change.

I had to drill new holes for the skid (I 3D printed a jig)
The SCX10.2 tranny is mounted...

• HumboldtEF
• Replies: 34
• Forum: 1.9 Scale Rigs

$10 gets you a winch motor/gearbox replacement, then all you need is a spool, a bearing and some line.

(out of stock everywhere it seems) RC4WD Replacement Motor/Gearbox for 1/10 Warn 9.5cti Winch

Its pretty useful although the rig I have it on is already super low so on something with longer travel it should be much more useful.

 

[ktse]

I am not running one but instead running a much more primitive method; rubber bands/hair ties to pull the front end down.

I do think it's a brilliant idea to have the ability to drop the front end on command especially on a more trail oriented rig. I have not seen anyone use them, most folks will just install regular winches before installing a suck down winch.

 

[Timmahh]

Take a good quality mini servo. mount it above the axle on the chassis, with a fairly long arm (Reefs has a long arm for the mini servos).
Then a piece of cable mounted to the axle, to the end of the servo arm, just long enough to make it between the 2 points.

No need for a 'winch' when a servo and long arm will do. servo arm is down for full suspension, and up for suck down.

 

[Jefferson87]

Winch down or suck down winch is what I hear them called most often.

I put one on a rig a few years ago, I just took the guts out of an RC4WD winch and 3D printed a mount in a crossmember.

pics in post 1 here:

Thread 'Venduro X4.2 Dumpster fire build'

Jul 17, 2020

From my giant pile of spare parts I've been assembling an unholy abomination that I've coined the Venduro (X4.2)


HPI Venture chassis rails, Element Enduro Axles and links, Axial SCX10.2 skid and kit tranny, TRX4 shocks with Enduro springs, Junfac drive shafts (front is too short but working)


I ordered up UCFab's Enduro servo on axle mount to make the steering simple, plus I dont have any servo on axle setups on 1.9"s so this will be a nice change.

I had to drill new holes for the skid (I 3D printed a jig)
The SCX10.2 tranny is mounted...

• HumboldtEF
• Replies: 34
• Forum: 1.9 Scale Rigs

$10 gets you a winch motor/gearbox replacement, then all you need is a spool, a bearing and some line.

(out of stock everywhere it seems) RC4WD Replacement Motor/Gearbox for 1/10 Warn 9.5cti Winch

Its pretty useful although the rig I have it on is already super low so on something with longer travel it should be much more useful.

Nice, glad someone is doing it. Surprised it's not more common.

I'm not to worried about the winch it's self, I'll either do the reef 99 or similar.

I am not running one but instead running a much more primitive method; rubber bands/hair ties to pull the front end down.

I do think it's a brilliant idea to have the ability to drop the front end on command especially on a more trail oriented rig. I have not seen anyone use them, most folks will just install regular winches before installing a suck down winch.

It's how any serious 1:1 crawler buggy is set up. Low works well for climbing and side hills, but then you get hung on the belly easy. Winch gets you the best of both. Also with the ability to suck the shocks to full bump.

Take a good quality mini servo. mount it above the axle on the chassis, with a fairly long arm (Reefs has a long arm for the mini servos).
Then a piece of cable mounted to the axle, to the end of the servo arm, just long enough to make it between the 2 points.

No need for a 'winch' when a servo and long arm will do. servo arm is down for full suspension, and up for suck down.

I actually thought about that also would work well, and simple if you could get enough throw. Might try it for the heck of it since I have a spare high tq micro.

I want to try something I saw a long long time ago, like back in the tlt axles on proline smashers days guy had the winch mounted on one axle, rear I think. He had the cable running through a small tube mounted in the chassis ran to the opposite axle. The front had softer springs, so it would suck the front down first, then once the front was full bump it would suck the rear down also.

 

[XtrmTJ]

Doesn't Full Droop achieve the same results?

 

[Saltrock]

A winch keeps the end winched down while a droop suspension can unload on the hill and that always sucks. Limiting straps can also sorta help like a winch.

 

[Chingon]

Hey Jeff, I've been talking with you on Irate about your Capra. You might look at how Logan set up the suck down winch on his DLux Capra build. He talks about it at 6:55 in this video. Looks like he sells a Capra-specific winch mount.

 

[ferp420]

i once knew a girl that fit that discription!

 

[Jefferson87]

Doesn't Full Droop achieve the same results?

I've never tried it. Wouldn't the front end unload on vertical climbs?

A winch keeps the end winched down while a droop suspension can unload on the hill and that always sucks. Limiting straps can also sorta help like a winch.

The strap will help on climbs or side hills, but will end up on your belly more.

Hey Jeff, I've been talking with you on Irate about your Capra. You might look at how Logan set up the suck down winch on his DLux Capra build. He talks about it at 6:55 in this video. Looks like he sell a Capra-specific winch mount.

Bmxbry9 or '84 Bronco II? :flipoff2:

I watched that video and have seen his mount. It looks decent, I was just hoping for another option. I'd like to put it on the axle. I was playing with it the other day, a micro servo will fit directly on top of the steering servo and just kiss the x under the hood. So I may try to just make a simple bracket to do that.

 

[Chingon]

I've never tried it. Wouldn't the front end unload on vertical climbs?



The strap will help on climbs or side hills, but will end up on your belly more.



Bmxbry9 or '84 Bronco II? :flipoff2:

I watched that video and have seen his mount. It looks decent, I was just hoping for another option. I'd like to put it on the axle. I was playing with it the other day, a micro servo will fit directly on top of the steering servo and just kiss the x under the hood. So I may try to just make a simple bracket to do that.

'84 Bronco II, I didn't think my Irate username fit very well over here.

I think @XtrmTJ is talking about a full droop setup where you have springs inside the shocks under the piston so that they are always applying force to keep the shock collapsed.

The problems with this are that you will lose travel since the springs will take up some space inside the shock when they are fully compressed (full droop), and even if you get light enough springs that will let the axle droop out fully when you belly out, your tires aren't going to make very good contact with the ground since the springs will be supporting some portion of your axle weight. Your shocks also won't be able to absorb impacts when you have to bump things since the shocks will probably be bottomed out already and effectively be rigid.

I personally just use elastic hair ties on the front end since a suck down winch is not legal in the classes I compete in. I still get the full range of shock travel and it is enough to keep the front end from unloading completely when on steep climbs. It still has the downside of taking weight off the axle when drooping out, but it is a tuning tradeoff how much you want the front end to unload vs how freely the front end can droop out while bellied out.

 

[Jefferson87]

'84 Bronco II, I didn't think my Irate username fit very well over here.

I figured

I think @XtrmTJ is talking about a full droop setup where you have springs inside the shocks under the piston so that they are always applying force to keep the shock collapsed.

I remember seeing it back in the day, I thought some guys just ran no springs with super thick oil.

The problems with this are that you will lose travel since the springs will take up some space inside the shock when they are fully compressed (full droop), and even if you get light enough springs that will let the axle droop out fully when you belly out, your tires aren't going to make very good contact with the ground since the springs will be supporting some portion of your axle weight. Your shocks also won't be able to absorb impacts when you have to bump things since the shocks will probably be bottomed out already and effectively be rigid.

Exactly what my thoughts were. Seems like it could be a cheap easy way to may a low stable crawler. But there are obvious down sides.

I personally just use elastic hair ties on the front end since a suck down winch is not legal in the classes I compete in. I still get the full range of shock travel and it is enough to keep the front end from unloading completely when on steep climbs. It still has the downside of taking weight off the axle when drooping out, but it is a tuning tradeoff how much you want the front end to unload vs how freely the front end can droop out while bellied out.

As of now, this is just for fun, I like the super technical side of crawling and have 2 channels left so why not.

 

[XtrmTJ]

There are several variations of "droop". Full, 3/4, 1/2, and 1/4.
Desert Lizards provide various weight springs for several different setups. I run full droop on all my crawlers except my Bomber as I use that as a rock bouncer.