RCCrawler Forums

MaxxinINtheAZ · 10-04-2005, 04:39 PM

Has anyone ever tried a direct drive, with no tranny just motor with pinion to spur which would be atached to the drive shafts? just curious

brendan h · 10-04-2005, 05:01 PM

the truck will be too fast to crawl

grover · 10-04-2005, 05:02 PM

The motor needed to produce enough torque weighs three pounds and costs like three hundred dallors. What would be the benifit of losing the tranny? Not wheight, not cost...simplicity maybe?

You are up to something aren't you?

MaxxinINtheAZ · 10-04-2005, 05:04 PM

simplicity... maby I am

rbgerrish · 10-04-2005, 05:50 PM

I've tried a motor connected right to a 1.5:1 T-case, and that didnt work. Then I tried a motor and a GD600 right to the T-case and that didnt work either. Not enough gear reduction and/or torque to crawl the vehicle. I even ran 2 GD600's bolted together, but it didnt work well. I ended up using a stampede tranny with 1 GD600 and it was perfect.

ryan

MaxxinINtheAZ · 10-04-2005, 05:59 PM

Alright I guess this is an impractical idea

TylerV · 10-04-2005, 06:41 PM

don't give up yet. Here's a couple links to motors with planatary gear reductions on them. Just replace the motor with a lathe and you've got a reletively small transmission and motor. You'd just have to figure out how to drive both axles with one motor.
http://www.lynxmotion.com/Product.as...&CategoryID=71
http://www.lynxmotion.com/Product.as...&CategoryID=71

MaxxinINtheAZ · 10-04-2005, 08:37 PM

dang! 189:1 ratio with that thing... hmmm, thanks

toyofast · 10-04-2005, 09:58 PM

Quote:

Originally Posted by MaxxinINtheAZ

Alright I guess this is an impractical idea

It might work... if you could find the biggest freaking spur and smallest freaking pinion you could, hooked to a 55 turn motor. Then get an axle like this, it might work...

flexthe2nd · 10-04-2005, 10:24 PM

that axle looks good where can you get those?

rerock · 10-05-2005, 06:46 AM

Please tell me that is a model portal axle used to model something bigger; like a 1:20 scale UniMog axle...Otherwise how much would something like that cost?

swell searcher · 10-05-2005, 07:50 AM

Quote:

Originally Posted by flexthe2nd

that axle looks good where can you get those?

x2 that's freaking awesome...

MC_StinkyNuts · 10-05-2005, 01:29 PM

I have a TLT with a RBX Laydown chassis and a Reflex 10 direct drive tranny and a 55 turn motor in it. I think I’m runny a 15 or 12 tooth pinion and a 87 or 92 tooth spur (can’t remember what combo I ended-up running). It crawlers ok, but it makes one hell of an all-around basher. You can get it down to a crawl very easily. No fat fingers here

. But with a little “fat finger” it has a Sh@# lode of “Wheel Speed”

. With a GD600 it would be easier to drive. But I like it the way it is.
Disclaimer

I use my 2.2 Clod for a true rock crawler.

JohnRobHolmes · 10-06-2005, 08:56 PM

If you really want to reduce your tranny size the portal axle or planetary is best. I bet those portals that toyo posted are a grand a set or more (if you can get them). Planetary sets are loud and inefficient, but work well and are fairly cheap.

TylerV · 10-07-2005, 12:01 AM

The planetarys that I have are actually very quiet.

DISTURBIN' tha PEACE · 10-08-2005, 06:34 PM

Yeah, I like toyo's pic too.........Where are they from?

10-04-2005, 04:39 PM	#1
MaxxinINtheAZ Newbie Join Date: Sep 2005 Location: PHX Posts: 28	Direct drive Has anyone ever tried a direct drive, with no tranny just motor with pinion to spur which would be atached to the drive shafts? just curious

10-04-2005, 05:02 PM	#3
grover Rock Crawler Join Date: Jan 2005 Location: Tumwater Posts: 910	robot wars motor anyone? The motor needed to produce enough torque weighs three pounds and costs like three hundred dallors. What would be the benifit of losing the tranny? Not wheight, not cost...simplicity maybe? You are up to something aren't you?

10-04-2005, 05:01 PM	#2
brendan h Quarry Creeper Join Date: Sep 2005 Location: Sydney, Australia Posts: 373	the truck will be too fast to crawl

10-04-2005, 05:04 PM	#4
MaxxinINtheAZ Newbie Join Date: Sep 2005 Location: PHX Posts: 28	simplicity... maby I am

10-04-2005, 05:50 PM	#5
rbgerrish I wanna be Dave Join Date: Mar 2004 Location: The Haunted Forest Posts: 3,586	I've tried a motor connected right to a 1.5:1 T-case, and that didnt work. Then I tried a motor and a GD600 right to the T-case and that didnt work either. Not enough gear reduction and/or torque to crawl the vehicle. I even ran 2 GD600's bolted together, but it didnt work well. I ended up using a stampede tranny with 1 GD600 and it was perfect. ryan

10-04-2005, 05:59 PM	#6
MaxxinINtheAZ Newbie Join Date: Sep 2005 Location: PHX Posts: 28	Alright I guess this is an impractical idea

10-04-2005, 06:41 PM	#7
TylerV Rock Crawler Join Date: Nov 2004 Location: Roseville Posts: 560	don't give up yet. Here's a couple links to motors with planatary gear reductions on them. Just replace the motor with a lathe and you've got a reletively small transmission and motor. You'd just have to figure out how to drive both axles with one motor. http://www.lynxmotion.com/Product.as...&CategoryID=71 http://www.lynxmotion.com/Product.as...&CategoryID=71

10-04-2005, 08:37 PM	#8
MaxxinINtheAZ Newbie Join Date: Sep 2005 Location: PHX Posts: 28	dang! 189:1 ratio with that thing... hmmm, thanks

10-04-2005, 10:24 PM	#10
flexthe2nd Newbie Join Date: Sep 2005 Location: nampa idaho Posts: 1	that axle looks good where can you get those?

10-05-2005, 06:46 AM	#11
rerock Quarry Creeper Join Date: Sep 2005 Location: Minneapolis Posts: 440	Please tell me that is a model portal axle used to model something bigger; like a 1:20 scale UniMog axle...Otherwise how much would something like that cost?

10-05-2005, 01:29 PM	#13
MC_StinkyNuts Newbie Join Date: Jul 2005 Location: Topeka Posts: 16	I have a TLT with a RBX Laydown chassis and a Reflex 10 direct drive tranny and a 55 turn motor in it. I think I’m runny a 15 or 12 tooth pinion and a 87 or 92 tooth spur (can’t remember what combo I ended-up running). It crawlers ok, but it makes one hell of an all-around basher. You can get it down to a crawl very easily. No fat fingers here . But with a little “fat finger” it has a Sh@# lode of “Wheel Speed” . With a GD600 it would be easier to drive. But I like it the way it is. Disclaimer I use my 2.2 Clod for a true rock crawler.

10-06-2005, 08:56 PM	#14
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	If you really want to reduce your tranny size the portal axle or planetary is best. I bet those portals that toyo posted are a grand a set or more (if you can get them). Planetary sets are loud and inefficient, but work well and are fairly cheap.

Sponsored Links

10-07-2005, 12:01 AM	#15
TylerV Rock Crawler Join Date: Nov 2004 Location: Roseville Posts: 560	The planetarys that I have are actually very quiet.

10-08-2005, 06:34 PM	#16
DISTURBIN' tha PEACE I wanna be Dave Join Date: Jun 2005 Location: On the G-Train!!!!! Posts: 6,081	Yeah, I like toyo's pic too.........Where are they from?

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