R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Oval, Larger Scales and More

Like Tree1Likes
Reply
 
Thread Tools Search this Thread
Old 10-21-2012, 08:48 PM   #991
Tech Addict
 
Join Date: Sep 2005
Posts: 665
Trader Rating: 26 (100%+)
Default

Looks like there's quite a few 8th elecs now.
I'm kicking off my 8th electric dreams again.
My previous setup CLICK

What I'm really interested in is
Motor:..................Size/KV
Battery:................?s ?Mah ?C ?Brand
Run time:..............?Sec (flat out racing. No car park bashing)
Gearing/Speed.......?Spur ?Pinion ?Top speed KM/h Mph (or nitro comparison)
Ready to race weight.....?Kg's

What I learnt with my original setup was it's all about compromise.
Runtime vs Weight (direct effect on handling)

Could I ask the guys who've been running and testing these setups to post up their results?
CountryHick is offline   Reply With Quote
Old 10-21-2012, 09:14 PM   #992
Tech Addict
 
Join Date: Sep 2005
Posts: 665
Trader Rating: 26 (100%+)
Default

I'll go first.

Motor:..................NEU1512/2050KV
Battery:................6s 2650Mah 45C Thunderpower
Run time:..............280Sec (4.40mins) (flat out racing. No car park bashing)
Gearing/Speed.......45Spur 21t Pinion No radar but top speed feels same as nitro, punch is unbelievable.
Ready to race weight.....2.75Kg's

Other notes.
The packs were used already. They showed signs of puffing before use and more puffed after use.
Motor saw 70 C at end.
Speed control (MMM) didn't break a sweat.

Thinking about dropping motor KV and gearing up.
Will this change give more runtime and comparable temperatures/speed?
CountryHick is offline   Reply With Quote
Old 11-03-2012, 12:41 PM   #993
Tech Master
 
MikaR's Avatar
 
Join Date: Oct 2006
Posts: 1,526
Default

Motor:..................ORION 1950KV sensored
Battery:................6s Orion 4600 mAh 90C
Run time:..............8 mins (flat out racing. No car park bashing)
Gearing/Speed.......45Spur 18T - 22T Pinion
Ready to race weight.....

Other notes.
Cooling intake added on top of the Lola body, haven't tested it yet but previously the 18T was max gearing that didin't temp cut
__________________
http://modelcartuning.simplesite.com/
MikaR is offline   Reply With Quote
Old 12-10-2012, 05:16 AM   #994
Tech Regular
 
Join Date: Jan 2007
Location: Rantoul,Il
Posts: 424
Default

Hey Yodog- couple of questions. 1. how much did your original car weigh? 2. How thin a material can I get away with on a new chassis for my Evolva? (In G10, graphite is too expensive and hard to work with) My Evolva currently weighs 82.5 ounces, I'd like to get it down to 80 ounces. I'm using a 4s A123 pack. After rereading the whole thread I now know that I must use 5mm. Your original car weight must have been between 5.5-6 lbs. Thanks, Don

Last edited by DLS II; 12-10-2012 at 06:04 PM.
DLS II is offline   Reply With Quote
Old 12-10-2012, 10:47 PM   #995
Tech Master
 
YoDog's Avatar
 
Join Date: Aug 2006
Location: Lompoc, Ca.
Posts: 1,652
Trader Rating: 26 (100%+)
Default

Quote:
Originally Posted by DLS II View Post
Hey Yodog- couple of questions. 1. how much did your original car weigh? 2. How thin a material can I get away with on a new chassis for my Evolva? (In G10, graphite is too expensive and hard to work with) My Evolva currently weighs 82.5 ounces, I'd like to get it down to 80 ounces. I'm using a 4s A123 pack. After rereading the whole thread I now know that I must use 5mm. Your original car weight must have been between 5.5-6 lbs. Thanks, Don
Hi Don, I actually didn't weight it. You could probably get away with 4mm for the chassis but as you said, it's normally 5mm.
YoDog is offline   Reply With Quote
Old 12-11-2012, 05:04 AM   #996
Tech Regular
 
Join Date: Jan 2007
Location: Rantoul,Il
Posts: 424
Default

Thanks, Don
DLS II is offline   Reply With Quote
Old 12-13-2012, 03:28 AM   #997
Tech Apprentice
 
Join Date: Mar 2009
Location: Germany
Posts: 70
Default

Hi,
my name is Armin.
Working for Shepherd Micro Racing in Germany.
Design in cooperation with a passionated Swiss Ingineer.

In attach some Pictures of our 1/8 Scale Project!!!

More informations will follow soon....
Attached Thumbnails
Will there ever be a 1/8th scale Electric onroad car-v85.jpg   Will there ever be a 1/8th scale Electric onroad car-v84.jpg   Will there ever be a 1/8th scale Electric onroad car-v83.jpg   Will there ever be a 1/8th scale Electric onroad car-v82.jpg   Will there ever be a 1/8th scale Electric onroad car-v81.jpg  

veloxrc is offline   Reply With Quote
Old 12-13-2012, 07:07 AM   #998
Tech Addict
 
Cadman1981's Avatar
 
Join Date: Nov 2012
Location: Montreal, Quebec
Posts: 551
Trader Rating: 1 (100%+)
Default

Hey guys, i've been reading through this tread, and the cars look great. In montreal, 1/8 scale gas is popular, especially Serpent models, so i'm interesting to see how these cars evolve.

I just can't help but notice how... the chassis layouts are, with the batteries at the extreme sides of the car, it must make the cars handle strangely? Has anyone modified a chassis with the belt that runs down the side going down the middle? It should be straight forward, move the pully in the front to infront of the motor, switch the belts, and move the batteries closer to the centerline, and the ESC and reciever on top.
Cadman1981 is offline   Reply With Quote
Old 12-13-2012, 07:36 AM   #999
C@T
Tech Adept
 
C@T's Avatar
 
Join Date: Oct 2012
Posts: 186
Default

It would be possible to run the belt in the middle, but then you will have the motor sticking out to the side by something like 100 mm from the centerline.

Rough calculation: Motor 74 mm + fixture 6 mm + pinion 10 mm + cables ???.

Not a very nice design.
C@T is offline   Reply With Quote
Old 12-13-2012, 07:46 AM   #1000
Tech Addict
 
Cadman1981's Avatar
 
Join Date: Nov 2012
Location: Montreal, Quebec
Posts: 551
Trader Rating: 1 (100%+)
Default

No no, leave the motor where it is, keep it a 3 belt design,
Cadman1981 is offline   Reply With Quote
Old 12-13-2012, 09:32 AM   #1001
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by veloxrc View Post
Hi,
my name is Armin.
Working for Shepherd Micro Racing in Germany.
Design in cooperation with a passionated Swiss Ingineer.

In attach some Pictures of our 1/8 Scale Project!!!

More informations will follow soon....
A couple of concerns...

1. The enlarged (1/8th, 2wd, direct ) Pro-10 car YoDog is working on appears to be a better solution. Its is lighter, simpler and has an infinitely more efficient drive train.

2. Sensorless motors have horrible race start and throttle response. A 2wd 1/8th direct drive pan car running a 550 size sensored modified motor on 2s would be faster everywhere than a Nitro 1/8th car. Modified 4wd sedans on rubber tires are going 65mph on large asphalt tracks today.
__________________
Adrian Martinez
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series
AdrianM is offline   Reply With Quote
Old 12-13-2012, 10:17 AM   #1002
Tech Champion
 
robk's Avatar
 
Join Date: Aug 2001
Location: Macho Business Donkey Wrestler
Posts: 7,531
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by AdrianM View Post
A couple of concerns...

1. The enlarged (1/8th, 2wd, direct ) Pro-10 car YoDog is working on appears to be a better solution. Its is lighter, simpler and has an infinitely more efficient drive train.

2. Sensorless motors have horrible race start and throttle response. A 2wd 1/8th direct drive pan car running a 550 size sensored modified motor on 2s would be faster everywhere than a Nitro 1/8th car. Modified 4wd sedans on rubber tires are going 65mph on large asphalt tracks today.
Couple questions....what happens when air packs under the nose @ 80 mph on a 3 lb car? And how will a giant pan car hold up to those types of crashes?
__________________
A mutually re-enforcing cascade of failure

"Failior [sic] crowns enterprise." Robert Goddard

I-Lap Scoring Systems http://www.rclapcounter.com/
robk is offline   Reply With Quote
Old 12-13-2012, 10:19 AM   #1003
Tech Master
 
2wdrive's Avatar
 
Join Date: Mar 2009
Location: The Netherlands
Posts: 1,316
Default

Why make a 1/8 scale pancar when you can buy a 1/10 scale 235mm pancar (pro10) and be done?

A pro10 will be lighter, can drive more comfortable on smaller circuits and is fast. A pro10 with lola, 2s with 7t delta will have more corner speed and acceleration then many can handle comfortably. Everything is already there if you want to drive a pancar really really fast.

(German Masters pro10 2012)
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


(German Masters pro10 2009)
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
__________________
www.rc-lemans.de

Last edited by 2wdrive; 12-13-2012 at 10:32 AM.
2wdrive is offline   Reply With Quote
Old 12-13-2012, 12:14 PM   #1004
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by robk View Post
Couple questions....what happens when air packs under the nose @ 80 mph on a 3 lb car? And how will a giant pan car hold up to those types of crashes?
It will take off and fly.

It will be fine.
__________________
Adrian Martinez
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series
AdrianM is offline   Reply With Quote
Old 12-13-2012, 12:26 PM   #1005
M7H
Tech Elite
 
M7H's Avatar
 
Join Date: Dec 2004
Location: The Netherlands
Posts: 2,193
Default

Quote:
Originally Posted by AdrianM View Post
Sensorless motors have horrible race start and throttle response.
This equipment is totally different from what you have seen so far, so believe me, in this case you are wrong.

Here you have there previous motor/esc combination.
http://www.youtube.com/watch?v=EdEhCun8ZRg
__________________
Serpent
M7H is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTT Nitro onroad 4 electric onroad rswartz R/C Items: Wanted to Buy 0 02-16-2008 05:22 AM
WTT: 1/10th scale electric offroad for onroad... M2_Driver R/C Items: For Sale/Trade 7 10-22-2007 06:48 AM
Electric heli and 1/5 scale onroad F/S... Nitrobuzzard R/C Items: For Sale/Trade 3 08-18-2007 07:41 PM
1/8 electric onroad?? Saber186 Electric On-Road 2 04-22-2006 10:25 AM
I need electric Onroad xxxssportracer R/C Items: Wanted to Buy 5 05-20-2003 04:00 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:49 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net