***__ The 1/8 Onroad Think-tank __***

[samwong]

Thanks for your data sharing...

Regarding the temperature problem in motor.... I have some thing not certain...

1. Given other things the same, Higher voltage 6S gives same MOTOR operating temperature as 4S. My thinking...

As either 6S or 4S, the motor rotating force depends on the current on the wiring of motor, and the more current through the wire, the heat will be in proportion. So the heat of motor should relate to Current from ESC, but not related to the voltage of Lipo.

So 6S or 4S will be the same for the Motor Heat issue.
Please correct me.. if I am wrong.

2. The faster the acceleration, the higher the temperature.

As force required is larger for higher acceleration, so current or heat are also larger.

If I adjust the driving style a bit, softer acceleration, that can help the motor heat problem. As currently the acceleration is like a rocket... faster than a 1/12th pan car ..... too much for me.. and others..


3. Braking also gives additional temperature rise.

Heavy and frequent brake ... can make motor suffered additionally.


I will have another trial run with Losi 2100kv ( Diameter is 39mm, maybe torque will be larger ) , 4S and 44T/19T and see the result.

[mabu]

Originally Posted by B4maz

From Red RC

A 2 speed with no mechanical brake? I'm assuming its not completed yet.

The conversions looks nice, but i also assume that's it is not finished yet ...

Looks like the mechanics of the brake are there, just no servo.

Here is the Capricorn Serpent 960 conversion finished.

[mabu]

i do not think that 2 gears are needed at brushless conversions. i removed the second gear in my revo ...

how much weight have your serpent conversions? ( including/excluding lipos/fepos? )
I guess my intended 6s fepo will have to much weight :(

[samwong]

Weight w/o Lipo: 2480g
Weight w/o 4s 6000mah Lipo:3155g

Another test today with 2100kv Losi:

45T s / 19T p
Run Time : 40mins!!
Speed : Comparable to 1/10 Gas Car (preparing to change to 5S or 6S)
Temperature: Motor 52 - 58deg cel. after continuous 10min run (still have around 10deg cel room)

Originally Posted by samwong

Weight w/o Lipo: 2480g
Weight w/o 4s 6000mah Lipo:3155g

Another test today with 2100kv Losi:

45T s / 19T p
Run Time : 40mins!!
Speed : Comparable to 1/10 Gas Car (preparing to change to 5S or 6S)
Temperature: Motor 52 - 58deg cel. after continuous 10min run (still have around 10deg cel room)

6S with your 2100KV motor and current gearing should give you around the same top speed as a gas powered 1/8th. Punch out of the corners is another story, you will leave them for dead!!!

I would love to see some video.

I was planning on running mine tonight against other 1/8ths at my local club as it turns out it has been raining and it also looks like I have to go into work

[magman]

Originally Posted by B4maz

Here is the Capricorn Serpent 960 conversion finished.

Any plans to do a Mugen MRX-4? I have 3 friends w/Mugens that would be interested in a kit.

[samwong]

Originally Posted by Countryhick

6S with your 2100KV motor and current gearing should give you around the same top speed as a gas powered 1/8th. Punch out of the corners is another story, you will leave them for dead!!!

I would love to see some video.

I was planning on running mine tonight against other 1/8ths at my local club as it turns out it has been raining and it also looks like I have to go into work

Last night changed to 5S Lipo, and use Losi ESC also, gearing the same. Test run and found Top speed comparable to Gas Powered 1/8th.
While Out of corner acceleration and start acceleration.... is totally different world ..

Another thing found is after changing ESC to Losi, and changed the timing to "low", also with two heat sinks added w/ thermal glue, the motor temperature dropped to 48deg cel only!! and ESC temp around 43deg cel. after continuous run.

Attached some photos after the changes.... should go to the track for a first run and try to take some video next Sunday.

[Ryu James]

Originally Posted by B4maz

Here is the Capricorn Serpent 960 conversion finished.

what size lipos are those in these pics and what are the largest lipo packs that will fit in this conversion? could a standard 4s or 5s 5000mah pack fit?

if so, that has got to be the cleanest conversion i have seen on a 1/8 Serpent. with the exception of Serums conversion here on the forum. he built a super clean 1/8 serpent that is very similar to the Capricorn kit.

[phatmonk]

I had a powerracing XR80 and just driving on dry summer pavement required tire traction compound and it was a handfull to drive.The payoff was winding it up and hitting 70 mph in seconds.So what brushless motor will fit this conversion.It looks like a 36mm XL fiegao type motor in the car now.I would drop the 2 speed though.Still very cool and I want one now.Would a Neu 1515/1.5d/F fit?

[Romster]

So where can we by the conversion? How much is this conversion?
I went on web-site nothing......when will it be available?
Planning on converting the 1/8 Kyosho evo.

[jhautz]

how do you change the batteries in that thing? Looks like you have to take the drive belt off to get to the battery.

[jahno30]

Hey guys....
I too am doing a 1/8 conversion..

I have the power racing X8and was considerring the CC 2650 combo , but am unsure as to where to get a single gear conversion and also if a 4S 25c 4000 zippy rhino will be enough to push the car to some decent speeds

heres a link to the battery it's weight looks really good for a 1/8 onroad project. Just not sure if It'll be enough
http://www.hobbycity.com/hobbycity/s...idproduct=7656
let me know what you think

[Romster]

Soooo it makes me wonder if they will have an update version since the New serpent 966 is coming out. Time to go on Flea--bay for serpent 960 roller.