Ofna DM-One Brushless Conversion (DM-1)

[ClodMaxx]

any updates on this, jeff? i'm watching this thread eagerly... i'm not a on road car guy, but my LHS does have an indoor track...although i don't think it's 1/8 scale. but it'd be fun to practice there! your car is just plain wicked...

[Nuclear]

any more vids or updates on the car.....that is one sweet Ofna DM-1

thanks for reminding me why i hate nitro cars all that noise and no go worth a toss.
I could see you were struggling with the brakes in the video as you mentioned i wonder why the stock brakes are so naff is the car heavier than nitro form?

Also what servo are you using for brakes perhaps you need one that has more torque.

[jhautz]

Originally Posted by chilledoutuk

thanks for reminding me why i hate nitro cars all that noise and no go worth a toss.
I could see you were struggling with the brakes in the video as you mentioned i wonder why the stock brakes are so naff is the car heavier than nitro form?

Also what servo are you using for brakes perhaps you need one that has more torque.

The brake servo is an airtronics 94758 digital (115oz) so it should have plenty of torque. When the brakes are cool and fresh it can lock the tires up easily, but after only a couple hard stops they heat up and fade to the point of being useless. They get so hot when I picked it up to check what was going on I could smell them burning.

The car is ever so slightly heavier than the the nitro form. But not much at all. The guy whos body I was borrowing runs his DM-1 nitro and we were comparing the weight of the 2 by holding one in each hand. We concluded that my electric was heavier, but it was so slight it was very difficult to tell by comparison. Couldn't be more than a few ounces different. He has the same problem with brake fade on his also so I think its just a function of trying to have a single disk do all of the work to stop that thing. Buggies have 2 disks and truggies typically have 4. This probably weighs about the same as a typical buggy. I think if I upgrade to a 2 disk setup I should be OK.

[MetalMan]

Feigao XLs are 36mm in diameter, KB45s are 45mm in diameter. So figure 9mm, or 1cm or 1/2" for clearance.

Did you ever figure out anything for the brakes? I want one of these things, bad. I would want to do an hv setup, probably on an airplane controller, so I would run the mechanical brakes. You can just double them up, correct? Or if you swap to the center diff, you could use the buggy brake setup. Ill probably end up using a center diff and doubled up front discs with a single rear.

[jhautz]

Originally Posted by Nuclear

jUst wanted to know, how much were your electronics, I want to really get my project DM-1 started someday soon.... besides the electronics, what else did you have to modify or buy from RC monster?

thanks a whole bunch for the excitment!

The speed control is available here at RCM for about $275 and the motor was aorund $325. You dont have to use that high end of equipment to make one go though. The Mamba Monster Max or Tekin 1/8 controller/motor setups will likely be cheaper than that and should be a great fit when they are released (soon hopefully). Even a Mamba Max and Feigao on 4s would work. The car is no heavier than a 1/8 buggy and they work fine in that application.

The only other thing I bought was the Jammin Buggy motor mount from RCM. The rest of the stuff I made myself.

Originally Posted by B15

Did you ever figure out anything for the brakes? I want one of these things, bad. I would want to do an hv setup, probably on an airplane controller, so I would run the mechanical brakes. You can just double them up, correct? Or if you swap to the center diff, you could use the buggy brake setup. Ill probably end up using a center diff and doubled up front discs with a single rear.

Any of the solutions you mentioned should work fine for solving the brake fade issue I ran into. I got a pair of fibergalss disks to replace the singel steel disk. I haven't been able to test it yet due to the winter weather, but expect it should do the job as well.

[jzemaxx]

What kind of speeds are you building this setup for??

[Nuclear]

the speed i like would be just like the vid shown here......

[jhautz]

Thats set up for right about 60mph. Plenty for general bashing. You could easily gear it higher for speed runs.

[DRIFT_BUGGY]

Far out that is nice. Everything is clean and looks factory, Top Job

[Nuclear]

arrrrggghhhh No updates, vids yet? arrrrgghhhhh ;-)

[Nuclear]

wow,,,,no updates or vids yet??????? its summer!!!! (LOL)

[jhautz]

Dude!!!! You are relentless.

I have run it a couple times, and tried to get vid once, but it doesn't really get anything cuz its to dark out in the lot where we run. Thats why I painted it yellow. SO I could see it in the dark lot at night.

As for updates. What is there to say besides what I said already. It runs nice. Very fast. Actually to fast, but in a good way. About the time I start to outrun the nitros it kicks into 2nd gear and its like nitrous oxide and its just gone. The last time I had it out there I had 2 guys laughing at it cuz it was so fast they thought it ridiculous. Another one of them was telling me that it was no good cuz I would spin the tires to easy, and then I lapped him and I didn't hear any more.

Its loads of fun, but I haven't been able to run it as much as I would like. I have been spending most of my RC time at the track with my buggy and truggy.

Build one, they are fun. I'll try to get some vid next time I take it out.

[lutach]

Originally Posted by jhautz

Dude!!!! You are relentless.

I have run it a couple times, and tried to get vid once, but it doesn't really get anything cuz its to dark out in the lot where we run. Thats why I painted it yellow. SO I could see it in the dark lot at night.

As for updates. What is there to say besides what I said already. It runs nice. Very fast. Actually to fast, but in a good way. About the time I start to outrun the nitros it kicks into 2nd gear and its like nitrous oxide and its just gone. The last time I had it out there I had 2 guys laughing at it cuz it was so fast they thought it ridiculous. Another one of them was telling me that it was no good cuz I would spin the tires to easy, and then I lapped him and I didn't hear any more.

Its loads of fun, but I haven't been able to run it as much as I would like. I have been spending most of my RC time at the track with my buggy and truggy.

Build one, they are fun. I'll try to get some vid next time I take it out.

It's funny how some nitro guys still thinks nitros are faster . You must love all the excuses you get from them. You should find a new group of nitro guys just to take their money .