KB45-17XL in a 1/5 FireHammer M/T

[Overdriven]

Originally Posted by magman

I love the size of the 7th scale more so than even the 1/8 stuff. I am just skeptical about getting one for a couple of reasons...

1. durability
2. part support
3. cost of converting one to elect. ( bigger batts, motor, etc..)

The firehammer is a clone of an FG, and most parts are interchangeable, so parts are out there. I can't speak for the firehammer, but my FG took some of the hardest hits I've seen. During a runaway, it hit a curb as tall as the truck dead on @ 30+, bounced up and over it without losing much speed, hit the wall that was 3ft behind it, then landed and stalled out. Nothing broke or even bent from that, or the other countless rollovers, cartwheels etc.

Cost, thats another story. Thats why I stretched my revo. Being 10lbs lighter, the cost of electronics will be lighter too. Still would love to do one though.

Aqwut, thanks for sharing your conversion and making vids for us too

[suicideneil]

Aye, nice work on the conversion Aqwut- she's a real beast.

[BL_RV0]

Seems like that KB will fry at 50mph...

[lydiasdad]

I have several runs on a kb45-8xl in my 1/5 scale buggy and am happy with the power, however my temps are high on the motor. It does make impressive power though. Nice conversion by the way, pretty snappy on 12s

[aqwut]

Thanks guys.. the motor may fry... but it hasn't shown any sign of being demagnetized yet.... fan really helps with the heat, going to put a tube over the motor to see what happens.. it still runs after 10 minutes of play... That KB-45 is not the most efficient motor by far.... but if you could find a way to cool it down, it works like a charm...

[aqwut]

Well, KB45-17XL runs great on 8S... yesterday at the track, I ran 12S and forgot to turn the fan on... Motor reached temperatures of 109 Deg. C. Of course, rotor was demagnetized and pooched. Here are some pics of the mounts.. it was easy..





Here's a video.. of it for fun, with the 2280 and 4S ... ESC Temp was 40 Deg.C , Motor 44 Deg.C and Batteries were 57 Deg.C a bit too warm.. Wait till you see the 2280-6 HA on 8S... :)

http://www.youtube.com/watch?v=dV51RnoBrGc

[jsr]

Wow, the FH flips over on 12s!...that's some serious power. It looks like even on 8s, it has plenty of power for nice acceleration and speed. In your videos, you seem to run for pretty short periods of time. What is your runtime on the packs you're running? Also, what temps are the ESC and motor hitting if you run until the packs are dead (hits LVC)?

Thanks.

[aqwut]

My text was off.. on the picture.. The batteries I was using were 3700mAh.... and used two of them, that whole run drew the whole two packs.... Just got the batteries charged, and it drew 3500mAh per pack....

That looks very nice! Do you got an other vehicle so I can see how big it really is? (My LST also looks small on pictures, but if I put my Rustler VXL beside it the LST is huge )

And I've got another question; where do you get that aluminium? I've been in several stores in the Netherlands an Germany but I can only find damn tin aluminium. I have to use steel to make my motormounts. But I could only find steel with holes in, that isn't that cool...
So could you/anyone give me a site where to order that aluminium?

Thanks!

[aqwut]

Originally Posted by Byte

That looks very nice! Do you got an other vehicle so I can see how big it really is? (My LST also looks small on pictures, but if I put my Rustler VXL beside it the LST is huge )


And I've got another question; where do you get that aluminium? I've been in several stores in the Netherlands an Germany but I can only find damn tin aluminium. I have to use steel to make my motormounts. But I could only find steel with holes in, that isn't that cool...
So could you/anyone give me a site where to order that aluminium?

Thanks!

I get all my aluminum from eBay... I just buy angle aluminum and 6061 sheets.. It's very cheap... You should have a lot of aluminum over there... Thyssen Krupt is a huge company in europe... try buying from them, I'm sure you could buy aluminum from any fabricator..

[aqwut]

Here's the picture of how I made the mount..