Having some fun with 8s, 9s and 10s A123 cells (videos)
 

After switching from a Neu 1512/2Y (1400kv) to a Neu 1515/2Y (1100kv) i made some test runs with 8s, 9s and 10s A123 cells. This setup powers a 1:8 buggy/truggy hybrid (Robitronic Protos buggy Chassis with Robitronic Mantis truggy arms and tires). Overall gearing is 1:13 with a 14 tooth pinion and a centerdiff filled with 30000 silicone oil. ESC: Kontronik Jazz 55-10-32.

Click me to see me run with 8s A123 (Max 25500rpm, 78A, 1620 Watt)

Click me to see me run with 9s A123 (Max 28000rpm, 85A, 1920 Watt)

Click me to see me run with 10s A123 (Max 31000rpm, over 2KW)

Click me to see a short slowmotion clip.

Nice..love the slow motion flip!!

That's crazy!! :surprised:

I could cut my pizza with those front wheels on 9 and 10S. :yes:

cool. got some power there

pizzas in the oven(literaly)

that thing is crazy!

Awesome. My truck did the same thing on 10S A123. It actually jumped about 2 feet off the ground. It's just awesome power. Great videos.

my pizza burned..

I do love that Mantis, and those A123 cells. How do they all fit on the chassis, got some more top-less shots for me/us to drool over? The esc is super smooth too.

damn! lol. that things got some amazing power on 10cells lol. and love the slow motion flip haha

how much runtime do you get?

Cool pizza cutter but if it flips that way you end up cutting yourself :lol:

Great vids...

haha..I always had fun w/ my 1515/2Y on 10s A123 or 8S lipo, tho I didn't have the gearing quite so high as you. Mostly I pulled about 1700W.. there was plently of gearing to go up but it was plenty powerful and fast. Stayed dead cold too. :)

Altho I did do 12s A123 once... that was a show. The poor Revo didn't know what to do with itself

i got about 20-25min bashing.. and on the track I burned 1600mah in 10 min of racing.

Glad you all enjoyed those videos.

@kyosho501x
Runtime varies between 7-10 minutes depending on what surface i run her.

@suicideneil
A few months ago i started with the Robitronic mantis truggy. It was fun to drive but was not as agile as the buggy i drove before. Right now the car is based on the shorter Robitronic Protos buggy chassis using the Robitronic mantis truggy front and rear axle parts as well as the 52z spur of the truggy. Basically a truggy with the wheelbase of a buggy.

http://www.braintrust.at/2007/ds/rc/...run63_img1.jpg

http://www.braintrust.at/2007/ds/rc/...run63_img2.jpg

http://www.braintrust.at/2007/ds/rc/...run63_img3.jpg

http://www.braintrust.at/2007/ds/rc/...run63_img4.jpg

From time to time i run her as she was meant to be with shorter buggy arms and tires.
http://www.braintrust.at/2007/ds/rc/...run31_pic1.jpg

Click me to see me run with buggy tires and arms (Gearing with 15z pinion 1:1213 and 8s1p A123)

Click me to see me run as buggy/truggy hybrid with 8s A123 (1:13 gearing) on the same track

Click me to see me run as buggy/truggy hybrid with 10s A123 (1:13 gearing) on the same track

@Finnster
For 10s A123 she definitely is geared too high (temps still remain in check but performance is crazy). Ultimately i think i will gear her 1:13,8 and using 9s A123.

@brushlessboy16
Sorry about your pizza ;-)

Just for reference: Before i switched to the shorter buggy wheelbase i tried different gearings using the truggy chassis.

Click me to see the robitronic Mantis truggy with 10s A123 and 1:14,56 gearing
Click me to see the robitronic Mantis truggy with 10s A123 and 1:12,13 gearing

Wow, thats something a bit different and special. Kinda like the revo2.5 vs slayer with shorter arms. I like...

what camera do you have? lol nice tbruggy too :)

@A4DTM
All those videos were shot with a digital (photo) camera which also features a video function (resolution max 640x480 and 30fps): Canon Ixus 800 IS (european model) which is labeled Canon Powershot SD 700is in the US. Very handy and comfortable when used with a small telescopic tripod and quality suffices for web viewing. I converted those videos from AVI MJPEG to Windows Media files (using Premiere Pro or Windows Media encoder), so that their size is more appropriate for web viewing.