Outrunner motor for 1/8th trophy truck?
 

Hey guys I am building a 1/8th trophy truck and I am going to use an outrunner to power it, outrunner to wraith axle. I was wondering how big of one I need? It isn't going to be light due to its chassis being made of steel rod and a cage made out of steel tubing. I need a length and diameter so I can buy one to use in it. Can one of you outrunner guys help me out?

I ran an outrunner for a period in my two and four wheel slashes. Not the same I know but I was suprised at how a small motor could move them so well. The only disadvantage I found was the braking abilities of outrunners are sub par compared to an inrunner setup. If I wasn't racing I would not have cared the least. And they sound wicked when they run at high rpm. Tons of tourqe. I would say find a setup that has the kv for your voltage setup ie 30-40k rpm and around 1200w continuous at least.

Thanks for the info. I won't be racing so I could care less about the brakes. Do you think this motor would be enough on 3s lipo or should I get something with less Kv and god with a 4s set up because of the weight?

I'd recommend 500-700 size heli outrunner. I used one for awhile in my 1/8 Kyosho LM rally car. I also run the 600XL in a tunnel hull. My kv's were 1600 and 1650 on 4s.
Sounds tops.

http://www.wattsuprc.com.au/goods.php?id=1258

Thanks for the input. I used the speed calculator and it says a 1600kv motor is going to get me going like 60mph on 2s though... I am using the AX10 axle ratio which may be different from the Wraith ratio which I can not find out. Does anyone know what the Wraith axle ratio is?

Do you mean wraith as in AXIAL? Anyway, have a look at this link as it gives you exact measurements of 500, 600 & 700 sized Align outrunners.

http://www.wattsuprc.com.au/category.php?id=112

Pete

Yeah, Axial Wraith. I think I am going to go with a 35-42 700kv motor on 3s lipo to get about 40mph. Thanks for the help guys.

Sweet. I have the Honcho.:yipi: I ran it stock for awhile and it was awesome. I've always wanted to try a sensored setup so now I'm running a Ezyrun 21.5T motor with HUGE 5000mah 3s lipo.:lol: Goes all day! Got the MMP in there.

Anyway, I've always wanted to try an outrunner in it too. There's talk on rccrawler about one in production, so I plan to wait till I hear all the goss about that. It's a pretty tight fit in my honcho so the motors really have to be 540 can size.

Let us know how your selection goes.

Regards
Pete

That battery is a little too big for the truck lol. I ordered it yesterday and paid for the faster shipping form Hong Kong so it should be here in a week or so. I will keep you updated and I put a link in my signature to my build if you want to check it out.