Hyper PBS conversion on 12S lipo :)

[HugeOne]

This is our OFNA hyper PBS electric conversion:

http://www.truerc.net/canada2/threads/pbs1.JPG
http://www.truerc.net/canada2/threads/pbs2.JPG

We use a NEU 1912-1Y "ORK" motor and run it on 12S lipo with a CC phoenix 85HV. We choose that motor because it spin at max 36K rpm (max torque between 20K & 30K) therefore minimum gearing mod was required.

However a metal casing has to be made to seal the motor from dirt.

We first powered it with four TrueRC 11.1V 2100mAh packs in serie, these packs had powered a swift helicopter for a year so they were good for a suicide retirement. We didn't how much power the system could drain so we didn't wanted to risk fresh packs.

The buggy have an infinite amount of power, top speed in the 80-90 km/h range and it throw rocks so hard it's almost dangerous.

We had a small bashing session today in a dirtbike track and recorded it with eagletree micropower. The prop/headspeed measurement is actually ground speed calculated from motor rpm/gear ratio and tire diameter.

http://www.truerc.net/canada2/threads/hyper5.JPG

From that graph we can extrapolate a run time of about 14mins

-Hugo

[kufman]

Can you show more details of that clutch bell adapter?

[mindwreck]

lol peaking in a 2200 watts. 3hp? sounds like fun:D

[HugeOne]

Can you show more details of that clutch bell adapter?

We took a K factory 17T clutchbell that we drilled to 25/64, caution! this is very hard metal. Then we fitted a 10mm-5mm bore reducer over the motor's shaft held in plane with a dab of loctite (blue). We pressed the bored clutchbell onto the bore reducer with a pinion puller and voila.

lol peaking in a 2200 watts. 3hp? sounds like fun

We actually peaked to 3500W (4HP) but that smash the battery volatge down to 15V, so after reducing the throttle response setting we could limit peaks at 1800-2200W

-Hugo

[glassdoctor]

Awesome project!!!

How well does the start-up and brakes work with this controller?

[porra]

Nice I have another high voltage buddy LOL.How are you stopping the buggy. I thought the 19XX series only went up to 30K rpm, how is it holding up to the extra rpm?

[tcolesen]

If that 85HV is anything like my 110HV, then it starts the motor VERY smoothly. Mine had absolutely no problem starting the 12XL in my heavy 10s2p A123-powered Savage that was geared for ~75mph (in other words, overgeared).

[HugeOne]

The startup is very smooth, much better than we expected form an aircraft ESC. We use the ESC's brake and it also work quite well.

Steve Neu himself told me that I could run the 1912 at that speed for short burst and just watch motor temp more closely.

Porra,

I read your post about you HV truck and found about the Mod 1 pinion from mega motor, I just ordered a pair. The modified clutchbell I use seem a bit weak, take a look:

http://www.truerc.net/canada2/threads/gear1.JPG

The theeth are actually bent!

-Hugo

[porra]

The MOD1 gears from Mega are really nice. Make a video of the buggy in action. BTW my HV110 burnt and a few people said that the controller should have brakes disable, mine was disabled and it smoked pretty good LOL. I'm in the process of making a 200A ESC capable of handling 14S lipos. Please go to the following link for more details: http://www.rc-monster.com/forum/showthread.php?p=117404&posted=1#post117404
I'm having a hard time surfing radiocontrolzone, that is the main reason I haven't been here often.

[HugeOne]

My 85HV been running in the buggy for almost a year without issue. Yours may not have blown because it's in a truck, many others have blown for no reasons in airplane and helis alike. First runs of CC HV controller had problem in some units, but it's much better and the newest firmware is the icing on the cake.

Your ESC look really nice, if you plan to make a smaller 80-100A 100V one, I'm buyer and many of my helicopter flying friends as well.

-Hugo

[porra]

I'm working on getting a 100A 10 or 14S lipo controller and the engineer already told me it is easier to make a 80 and 100V ESC. The only problem is that I'm focusing on the vehicle side of the hobby and not the aircraft side.

[porra]

The engineer said he will send me a 100A controller, but it will not be the HV one. It will handle up to 7S lipos. He said that the FETs for the HV controller wasn't available.

[HugeOne]

Too bad you won't do airplane type compatible ESCs, anyway we could still use them by using only half of the throttle range.

I got a new pack for the buggy while waiting for the pinion:

http://www.truerc.net/canada2/custompacks/pics/12s2100saddlepack.JPG

It's a custom built TrueRC 12S 2100mAh saddle pack, should be a killer :)

-Hugo

[porra]

The 100A 10S controller that I have is actually meant for aircraft. The ESC is powefull. Check out the following links:

http://www. r c p i c s .net/view_single.php?medid=85681
http://www. r c p i c s .net/view_single.php?medid=85682
http://www. r c p i c s .net/view_single.php?medid=85683
http://www. r c p i c s .net/view_single.php?medid=85684

(Please remove the spaces)

[HugeOne]

We made three videos of the beast and inserted the eagle tree data in it.
Video#1 (http://www.truerc.net/vid/buggy12s1.wmv)
Video#2 (http://www.truerc.net/vid/buggy12s2.wmv)
Video#3 (http://www.truerc.net/vid/buggy12s3.wmv)

Enjoy!
-Hugo

[rccardude04]

Looks fast as heck, but why take the video on the sand where it just spins the tires?
-Eric