Custom Outrunner Setup

[Takedown]

Thats what the diffs are for BB. If you place very heavy diff fluid in both diffs it will somewhat act like a slipper on the 1st diff that the outrunner runs. This will not only save the diffs but it will help me feel safe. Plus you can probably use different ring gear sizes for gearing.

[brushlessboy16]

I understand what ur saying, but wont the diff just unload when u abuse i with ur trigger finger? and that will be alot of tuning with diff fluids, why not just make a slipper? it would be a hellova lot less complex too. take a look at the B44's clutch

[lincpimp]

Originally Posted by Takedown

Thats what the diffs are for BB. If you place very heavy diff fluid in both diffs it will somewhat act like a slipper on the 1st diff that the outrunner runs. This will not only save the diffs but it will help me feel safe. Plus you can probably use different ring gear sizes for gearing.

Unless you lock the first diff, it will just unload and spin the out drive that is not connected to anything (going by your pic I am talking about the top diff)

Using a center diff will help the ft & rr diffs survive. I would just ude a center diff, and the correct size pinion gear directly off the motor shaft. No need to have another diff. If mike brings out the slipperential we will have a great solution as it has a slipper built in. No worries about drivetrain shock with that setup!

[Takedown]

Ya linc, I was looking into that and it would be nice to have. When is it suppose to be released? I was also thinking that I could run a 2/1 gear ratio so I could double the 300rpm's coming from the outrunner.

[DrKnow65]

Takedown, have you played with BrianG's speed calculator yet?

As noted, you HAVE to lock the first diff, or else it will just unload on the side that has nothing connected to it. At that point, you may as well be using a spur gear there. There is absolutely no benefit to the added rotational mass of a diff if you have to lock it anyway. You can argue all you want, but there is absolutely no reason to have a diff in that location.

[Takedown]

Just tested it out. Heres what I got...

[Takedown]

Ok here are some pics of the overall room and the layout of the Low CG HPI chassis... I think this custom setup can be done.

[brushlessboy16]

Hey Ryan, i had an idea that u might like... have u thought of running mechanical brakes off the outrunner? It will allow you to run cheaper-Higher voltage plane escs. or it would just take the stress off of you current speed control under braking.

[DrKnow65]

Looking at the chassis (mabey you could set the motor in there just for size reference) I would say using a center diff (you can put heavy fluid in it to keep it from unloading too bad) and a large pinion gear (like sikes O-Maxx) would be the best bet. Later on you could get RCMikes slipperential to replace the center diff and you'd have all the bases covered. I realy liked the idea of a indirect mounted pinion gear (basically what you are doing with the motor-dogbone-2nd diff) to keep the load off the motor bearings, but I'm not sure you have the room to do it?

Mechanical brakes are a good idea too. You could run them on the center diff just like a regular buggy.

[brushlessboy16]

that is exactly what i was gonna say. Get some savvy brake hubs and disks, get a center diff mount, brake pads and caliper and a spare servo

[Takedown]

I would really like to try this out though... Might open up new doors for future outrunner conversions as an option.