Go Back  R/C Tech Forums > General Forums > Electric Off-Road
Schumacher Cougar KF!!! >

Schumacher Cougar KF!!!

Schumacher Cougar KF!!!

Old 11-13-2013, 05:35 PM
  #61  
Tech Master
iTrader: (2)
 
spu83's Avatar
 
Join Date: Nov 2010
Location: S FL
Posts: 1,619
Trader Rating: 2 (100%+)
Default

Also the belt on the KF is shorter and using smaller spur compare to K1.
spu83 is offline  
Old 11-13-2013, 05:50 PM
  #62  
Tech Champion
iTrader: (53)
 
Tony Newland's Avatar
 
Join Date: May 2005
Location: Utah
Posts: 5,932
Trader Rating: 53 (100%+)
Default

Exactly... being the internal ratio is adjustable like the SX and SV series via side gears, you can position the motor all over the place
Tony Newland is offline  
Old 11-13-2013, 05:57 PM
  #63  
Tech Addict
iTrader: (18)
 
Join Date: Sep 2011
Location: Muskegon, MI
Posts: 553
Trader Rating: 18 (100%+)
Default

We will have a couple of these hitting the tracks here in West MI as soon as possible!!
nhraman is offline  
Old 11-13-2013, 06:02 PM
  #64  
Tech Champion
iTrader: (53)
 
Tony Newland's Avatar
 
Join Date: May 2005
Location: Utah
Posts: 5,932
Trader Rating: 53 (100%+)
Default

Originally Posted by nhraman View Post
We will have a couple of these hitting the tracks here in West MI as soon as possible!!
Tony Newland is offline  
Old 11-13-2013, 06:05 PM
  #65  
Tech Adept
iTrader: (2)
 
StupidHead's Avatar
 
Join Date: Mar 2012
Location: Sydney
Posts: 197
Trader Rating: 2 (100%+)
Default

Originally Posted by Tony Newland View Post
The almost, 20mm longer wheelbase (285mm) aids in weight bias to the rear. The original SV and SV2 both are very short (267mm), therefore putting much more bias on the front tires. If you picture the forward most part of either the motor or battery in both cars the KF is much further back than the SV2. With the majority of the weight further back the pivot point will be further back
That's not true, the KF has loads more weight on the front wheels than the SV2. The original SV was 267, but the SV2 was 8mm longer, so only 10mm shorter than the KF. If you look at the two side by side, even with that extra 10mm, it is still massively nose heavy compared to an SV2 (or any other MM car).

Hopefully you guys can come up with some good setups to counter the weight balance and I get my KF on the track.
Attached Thumbnails Schumacher Cougar KF!!!-sv2-kf.jpg   Schumacher Cougar KF!!!-sv2-kf2.jpg  
StupidHead is offline  
Old 11-13-2013, 06:09 PM
  #66  
Tech Adept
iTrader: (2)
 
StupidHead's Avatar
 
Join Date: Mar 2012
Location: Sydney
Posts: 197
Trader Rating: 2 (100%+)
Default

Originally Posted by Tony Newland View Post
Exactly... being the internal ratio is adjustable like the SX and SV series via side gears, you can position the motor all over the place
This doesn't change the motor position at all, it is a vertical adjustment between the fixed position layshafts, the motor mount and thus motor position is not affected.
StupidHead is offline  
Old 11-13-2013, 06:15 PM
  #67  
Tech Champion
iTrader: (53)
 
Tony Newland's Avatar
 
Join Date: May 2005
Location: Utah
Posts: 5,932
Trader Rating: 53 (100%+)
Default

Originally Posted by StupidHead View Post
That's not true, the KF has loads more weight on the front wheels than the SV2. The original SV was 267, but the SV2 was 8mm longer, so only 10mm shorter than the KF. If you look at the two side by side, even with that extra 10mm, it is still massively nose heavy compared to an SV2 (or any other MM car).

Hopefully you guys can come up with some good setups to counter the weight balance and I get my KF on the track.
The SV2 is listed on Schumacher website as 267mm.... So the SV was 259mm?

The difference is the second pic you have is an SX3... the KF rear belt is shorter so that is not an accurate comparison to a SV2. The shorty mounted sideways is also misleading. With both cars built with same components the KF will be more rear biased.



Originally Posted by StupidHead View Post
This doesn't change the motor position at all, it is a vertical adjustment between the fixed position layshafts, the motor mount and thus motor position is not affected.
The side gears do not by themselves, your absolutely correct, but if you change the internal ratio and change the spur/pinion to compensate and achieve the same FDR, the motor can be moved fore and aft
Tony Newland is offline  
Old 11-13-2013, 07:15 PM
  #68  
Tech Adept
iTrader: (2)
 
StupidHead's Avatar
 
Join Date: Mar 2012
Location: Sydney
Posts: 197
Trader Rating: 2 (100%+)
Default

Originally Posted by Tony Newland View Post
The SV2 is listed on Schumacher website as 267mm.... So the SV was 259mm?

The difference is the second pic you have is an SX3... the KF rear belt is shorter so that is not an accurate comparison to a SV2. The shorty mounted sideways is also misleading. With both cars built with same components the KF will be more rear biased.
The SV was 267, Schumacher have had the incorrect length on the site for the SV2 since day one.

Here is another picture to demonstrate using a K1 and SV2. I have moved the SV2 forward 10mm as I believe the KF does away with the battery tray. There is no way a motor and centre assembly will fit between the red lines. I was going to put the SX3 centre in there against the batteries to show the exact dimensions, but I don't want to re-mount everything. I can if you really want me to though.
Attached Thumbnails Schumacher Cougar KF!!!-kf-sv23.jpg  
StupidHead is offline  
Old 11-13-2013, 07:23 PM
  #69  
Tech Champion
iTrader: (53)
 
Tony Newland's Avatar
 
Join Date: May 2005
Location: Utah
Posts: 5,932
Trader Rating: 53 (100%+)
Default

Im not too worried, time will tell. Mine will be here early next week, Im hoping to get to the track one day for some practice before raceday

I wrenched on a buddies Centro B4 a couple weeks ago and made it push, so if we have that much grip this thing should be good to go
Tony Newland is offline  
Old 11-13-2013, 07:56 PM
  #70  
Tech Adept
iTrader: (2)
 
StupidHead's Avatar
 
Join Date: Mar 2012
Location: Sydney
Posts: 197
Trader Rating: 2 (100%+)
Default

Yeah, don't take me highlighting the different weight distributions out of context. I'm still very excited to get the car, even if it may not be much use to me. When I drove my converted SX3 on super high grip, it was the best car I had ever driven and that was with a slap together "setup", so the KF can only be better. On a track where you're running slicks, I'm sure it will be a good thing.

I'm still praying for a new 285mm SV2 though
StupidHead is offline  
Old 11-13-2013, 07:57 PM
  #71  
Tech Addict
iTrader: (1)
 
trevcoll's Avatar
 
Join Date: Mar 2012
Location: Naugatuck, Ct
Posts: 671
Trader Rating: 1 (100%+)
Default

This might be my first Schumacher buggy in over 2 decades if it can be made to work on a medium traction indoor dirt track.
trevcoll is offline  
Old 11-13-2013, 08:02 PM
  #72  
Tech Champion
iTrader: (53)
 
Tony Newland's Avatar
 
Join Date: May 2005
Location: Utah
Posts: 5,932
Trader Rating: 53 (100%+)
Default

I agree... in the right conditions MM is untouchable. back when I tried a SV it was only good 2 weekends a year... the 2 big races we had and the track grooved up good. The rest of the time it was absolutely undrivable. Longer was better on that car, and should be even better on this one. Im excited to try it
Tony Newland is offline  
Old 11-13-2013, 08:15 PM
  #73  
Tech Master
iTrader: (2)
 
spu83's Avatar
 
Join Date: Nov 2010
Location: S FL
Posts: 1,619
Trader Rating: 2 (100%+)
Default

Now the big question is when.
spu83 is offline  
Old 11-13-2013, 08:38 PM
  #74  
Tech Champion
iTrader: (53)
 
Tony Newland's Avatar
 
Join Date: May 2005
Location: Utah
Posts: 5,932
Trader Rating: 53 (100%+)
Default

Very soon
Tony Newland is offline  
Old 11-14-2013, 06:27 AM
  #75  
Tech Addict
iTrader: (8)
 
Join Date: Oct 2012
Posts: 502
Trader Rating: 8 (90%+)
Default

You guys seen this?? KF domination at Silverstone.

http://www.racing-cars.com/scp/news/...partno=race748
juicy74 is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.