1/5 Brushless 4wd Conversion - RC-Monster Forums

Obeast44 · 06.01.2010, 08:33 AM

After reading a bit more, I am probably going to use the layout Ryu James used on his Rampage conversion. Outrunners look cool but the inefficiency, heat and the fact they dont like to be dirty makes them a hindrance IMO. Now I need to find a suitable motor/esc/battery combo that wont break the bank. Looks like more research for me :D

Ryu James · 06.01.2010, 02:15 PM

Quote:

Originally Posted by Obeast44

After reading a bit more, I am probably going to use the layout Ryu James used on his Rampage conversion. Outrunners look cool but the inefficiency, heat and the fact they dont like to be dirty makes them a hindrance IMO. Now I need to find a suitable motor/esc/battery combo that wont break the bank. Looks like more research for me :D

its a tough decisions cuz all of the "cheaper" options out there have not had good feedback. for example, kershaw designs makes a 1/5 brushless motor for a couple hundred bucks but i have not been seeing good things about it online.

maybe you should just get a Neu 2215 from offshoreelectrics.com for $425 and then a Castle HV 110. that would put you just over the $600 mark and then you can have my CNC'd motor mount and spur gear for cheap. i will pm you price. it would be a sick buggy but you almost need to wait to get it before dropping coin or doing too much.

Ryu James · 06.02.2010, 02:00 AM

obeast,

just a couple of quotes to consider from the forums as i have been reading more on 1/5 conversions:

"Neu, Plett, Lehner and Castle are the only guys with viable 1/5 inrunners I know about"

"I did a lot of testing with the 1717 motor and found that the top speeds are right about the same as with the stock gas motor, but the acceleration is much better."

that quote is with a baja conversion which weighs 28lb. it might do well on a 20lb conversion and could certainly reach that 40mph mark. but, if the buggy weighs 20lb now its likely to weigh a couple pounds more after redcat does their improvements to it.

06.02.2010, 03:40 AM

The lighter setup will serve you much better. A great motor with a 12 cell single series pack will only weigh 2.1 kg and give much more power and much better power to weight and 12-20 minute runtime depending on gearing.

The Neu 1917 variant I sell has 8mm shaft and fan and runs approx 18500 on 10 cells (5.2hp peak) or 23000 on 12 (8.5hp peak) - they weigh approx 1.1lbs. They run cool with bucket loads of power and cost $249. I recommend a sock or a open cell foam filter for motor cooling.

You can use cheap esc like the turnigy 200 and moderate rate cells - at least 30C cont and have a fast relaible car.

Obeast44 · 06.02.2010, 10:30 AM

Got a link to that motor? That motor sounds like itd be plenty powerful for what I need. Especially on 12s.
I was originally thinking of using 4 of the 6s 5800mah 30c packs from hobbycity. I know 4 of those things would weigh a lot, but the 40 minutes of runtime is absolutely critical. When racing I cant afford to change batteries while the gassers can just keep running. The extra weight in batteries is a sacrifice id be willing to make.

Ryu James · 06.02.2010, 01:05 PM

Quote:

Originally Posted by Obeast44

Got a link to that motor? That motor sounds like itd be plenty powerful for what I need. Especially on 12s.
I was originally thinking of using 4 of the 6s 5800mah 30c packs from hobbycity. I know 4 of those things would weigh a lot, but the 40 minutes of runtime is absolutely critical. When racing I cant afford to change batteries while the gassers can just keep running. The extra weight in batteries is a sacrifice id be willing to make.

so are you going to use 2 packs to create 12s and then 2 more to run in parallel? so you have 12s 11600mah?

Ryu James · 06.02.2010, 01:09 PM

Quote:

Originally Posted by Andrewg

The lighter setup will serve you much better. A great motor with a 12 cell single series pack will only weigh 2.1 kg and give much more power and much better power to weight and 12-20 minute runtime depending on gearing.

The Neu 1917 variant I sell has 8mm shaft and fan and runs approx 18500 on 10 cells (5.2hp peak) or 23000 on 12 (8.5hp peak) - they weigh approx 1.1lbs. They run cool with bucket loads of power and cost $249. I recommend a sock or a open cell foam filter for motor cooling.

You can use cheap esc like the turnigy 200 and moderate rate cells - at least 30C cont and have a fast relaible car.

what do you mean by Neu "variant"?

Ryu James · 06.02.2010, 01:20 PM

here is two thunder power 10s packs 5000mah for $136. normally $500 packs. if you had 10s packs and want to parallel you could saddle pack them on the chassis. just a thought. would look cleaner and might be easier to keep locked down than four packs floating around. this would give you 10s 10000mah.

http://www.espritmodel.com/index.asp...OD&ProdID=9837

Obeast44 · 06.02.2010, 02:11 PM

The 6s 5800mah 30c packs are small enough I can squeeze 4 of them in. Wired in series and parallel for 12s 11600mah. Unless I can find some 12s 5kmah packs somewhere. Those 10s packs are nice but honestly I dont know if theyd fit. Man I need to get my grubby hands on a test sample :)

@AndrewG Im curious to know more about this motor. I think Ryu James interest is peaked as well :)