1717 in a Desert Boy Chassis, It can be done !

[Bondonutz]

13.2 oz each

[Bmr4life]

For the wheel and tire combo? Man. That's not bad.

[sikeston34m]

Originally Posted by Bondonutz

Finially finished the entire assembly, Had insomnia last night and was balanceing tires at 4am. I haven't ben feeling the greatest the last couple days so I may not test until Monday or Tuesday ?

I installed the ESC(pulled red wire) , 1200mah 2s ThunderPower RX battery and RX on battery tray, lots of room for electronics there.

Mounted and balanced PL Trenchers on 23mm 40series 1/2" offset Dyed PL Velocitys




The XL body doesn't fit to bad, Think the next thing I may consider makeing will be a roll cage for the cab and tie into the F&R shock towers ? A roll over w/this Heavy assed MoFo will destroy some Polycarbonate.
Time to look for some 1/4" 7075 solid rod and fire up my aluminum welder.

Very nice build there Bondo! That thing's gonna kick butt!

What's that rotor I see in picture #1?

Nice job fitting the motor in. Do you think it's possible to squeeze the 1717 into an E Revo? I'm thinking about taking a look at that when my order comes in.

[Bmr4life]

Bondo, I just realized you drilled those wheels out. Aren't you worried about them breaking under such a heavy vehicle?

[Bondonutz]

Originally Posted by sikeston34m

Very nice build there Bondo! That thing's gonna kick butt!

What's that rotor I see in picture #1?

Nice job fitting the motor in. Do you think it's possible to squeeze the 1717 into an E Revo? I'm thinking about taking a look at that when my order comes in.

Originally Posted by Bmr4life

Bondo, I just realized you drilled those wheels out. Aren't you worried about them breaking under such a heavy vehicle?

Thank You Sikes
Rotor, the 6mm shaft that I turned down from the 1717
1717 in a Erevo, It's possible but thats asking a lot. The motor is nearly 2lbs and hangin off a questionable qaulity aluminum plate and a plastic trans case I can't see it working for long if it fits ?
If you try, get the heli version w/the flat sides.

MB4;
Not worried in the least, The structural webbing/braces are still intact.

[Bmr4life]

Gotcha. Well they look nice. I may have to try that.

[Bondonutz]

Went and ran the truck this afternoon, ran very well ! I'm very happy with the way it handled, sure footed and really put th power down with all the weight it has. With weight biased being 70/30 Front to Back it hardley wants to wheely at all with good traction. So far the BP diffs are holding, I need to pull them and fill with heavier diff fluid. I filled them w/15K and it's a bit to light for my preference.

I ran 2 sets of 3s in series and all the temps were great except the lipos got a little warmer than I would like. They were 115 with 82 ambiant temps. Think I'll look into a larger spur rather than a smaller pinion.

Heres 2 short videos, just a church field nothing special. When I take it out for a serious bash I'll grab some video of some serious terrain challanges.

CLICK ON IMAGES

[sikeston34m]

Dial in some more punch control maybe?

It appears to have a ton of bottom end torque.

What speed do you top out at on 6S?

Too bad we don't have a good 8S Castle ESC yet.

The 1717 looks promising. I can't wait to get my Castle Motors.

I'll have a 1518, a 1520, and a 1717 to experiment with.

Thanks for the vids Bondo. I really enjoyed em.

[Bondonutz]

Yeah, I forgot to mention that I plan on checking my settings befor I change gearing (I think PC is set at 80% ?)

After second run the motor was 137*, only let it rest after first run long enough to change packs.

The ESC was barely 90*

[sikeston34m]

Originally Posted by Bondonutz

Yeah, I forgot to mention that I plan on checking my settings befor I change gearing (I think PC is set at 80% ?)

After second run the motor was 137*, only let it rest after first run long enough to change packs.

The ESC was barely 90*

The motor can handle much higher gearing than that.

If you were to do an Eagle tree graph on this setup, I imagine it's spiking really HUGE on take off. I would definately play around with the ESC setting to tame those spikes as best I could. Without taking away performance, of course.

I remember a setup in my E Revo. A 36-60mm Medusa Can that was 1500kv.

Gearing was 22/40 using Mod 1 gears.

The motor handled this just fine with a heat sink/fan setup.

BUT.............on 4S it would literally carry the front end around.

I also remember running 2-4S 4000mah 20C packs in parallel with this setup, for some really good runtimes. Well..........one day I charged em up and hooked up a "SERIES" connector by mistake. This shoved 8S power through the ESC.

It armed, so I took off running. Not realizing what I had done. Until I seen the truck do a 30mph backflip when I stabbed the throttle.

I immediately realized my mistake and changed back to paralled. Everything survived.

We do need a 8S Castle Controller.

[Jahay]

Isnt running a 1717 on 8s a little risky considering the motor is only rated to 45,000rpm?

If you run this motor on 8s, at 3.7v the motor is operating at 46,768rpm and at 4.2v its at 53,000+rpm!!!!!

So this would be a little worrying...

That is why i bought the 1520 as it is still rated to 60,000rpm ;) and i want to push 9s through it ;)

just a little heads up... im sure it would be fine to run 8s but just thought i would mention this if you didnt know

[Finnster]

Originally Posted by Jahay

Isnt running a 1717 on 8s a little risky considering the motor is only rated to 45,000rpm?

If you run this motor on 8s, at 3.7v the motor is operating at 46,768rpm and at 4.2v its at 53,000+rpm!!!!!

So this would be a little worrying...

That is why i bought the 1520 as it is still rated to 60,000rpm ;) and i want to push 9s through it ;)

just a little heads up... im sure it would be fine to run 8s but just thought i would mention this if you didnt know

Its borderline, but that is the unloaded rated IIRC. Kv should drop, as should voltage under load. I don't think it will see quite that high of rpm, but surely over 40K tho. It would need a really tough controller to handle that much power tho. I can only imagine the amp draw

I was playing w/ some gear calcs yesterday, and I was thinking about the CC 1520 on 8s too. The 1717 is superbaddass too, so IDK.

[Bmr4life]

Would amp draw really increase with the increased voltage?

[Jahay]

no amp draw should drop with an increase in voltage

[Finnster]

Originally Posted by Bmr4life

Would amp draw really increase with the increased voltage?

Back when I was doing alot of eagletree, radar gun and other testing, I usually found only a modest increase in amp draw with increased voltage. 5% or less. Its mostly the increased voltage that builds the power. This was in my old hv revo setup going from 9S A123s on upto 12S A123. No gearing changes were done.


YMMV based on how you are driving, the truck and the terrain. It maybe you get less as you don't throttle as hard as there is already so much more power there, or the chassis can't handle it w/o flipping.

Overall the point was the 1717 would be a hellfire beast on 8S.