RCCrawler Forums

Grizzly4x4 · 10-20-2008, 05:04 PM

Now here is a project with potential, I'm very interested to see some video.

Looks like a very well thought out first stab at it. I can't see it as a comp crawler but I can see it being alot of fun. Nice work.

cato · 10-20-2008, 06:12 PM

Grizz.....my friend, Turn away now....before you are sucked in for good!

run2jeepn · 10-20-2008, 06:40 PM

Lets see the Vid.... This is by far the Best job to date....

littleskull99 · 10-21-2008, 02:23 AM

Thanks for the props guys.

I took this beast out yesterday for some night crawling in the rain. (I couldnt wait for light and dry wether) Got another two tanks through it. The engine is just about run in now and the revs are freeing up nicley. I get about 20 mins from a tank.
It needs gearing up slightly, Gonna put a 16t clutchbell on instead of the 15t thats on there.

The first lot of footage will be up in the next day or two.

Matt

BrockGrimes · 10-21-2008, 02:48 AM

Quote:

Originally Posted by sweli

Nice job.

Is the fan you have enough to keep temps down? Can you channel the air in and around the heads with some plastic shrouding and cut the body you plan on using?
Are you considering a marine head for the nitro motor to aid in cooling it with a small electric pump and radiator setup? Somewhere I saw a post on RCgroups.com where someone had done that to a Tmaxx.
Can you run it rich enough to lower head temp?

The marine head on an original t-maxx was me.
It works great at keeping it cool, but for a crawler it would be on a larger
scale, but I think I could probably do it on a 1/10, haven't researched it.

BrockGrimes · 10-21-2008, 02:55 AM

Quote:

Originally Posted by littleskull99

Hey,

I wanted to have a stab at a Nitro Crawler. I have tested it and it works. Will have video up soon.

Specs:
Axial Axles
Axial X Trail Chassis
Moabs for the time being
Toki 1cc NB16 Engine
NB16 Gearbox (4-1ish)
R2 Gearbox

Matt

Good work! I've been thinking about building one because people say you can't. Just like my liquid cooled maxx. Well thought out. If you'd like to see what I had in mind drop me a PM. Well done!

littleskull99 · 10-21-2008, 08:56 AM

Quote:

Originally Posted by BrockGrimes

Good work! I've been thinking about building one because people say you can't. Just like my liquid cooled maxx. Well thought out. If you'd like to see what I had in mind drop me a PM. Well done!

Brock, Did yer maxx end up lots heavier?

Matt

Big Mike · 10-21-2008, 02:06 PM

I never thought of a marine head with some kind of pump. That would be cool if it did'nt add an ungodly amount of weight to the chassis.

In the back of my mind I've always hoped someone would step up to the plate and build a viable nitro crawler. This is the first "threat" made on the subject that was'nt some kid running his yap about wanting to hack up his Savage. I've thought about it breifly, but in all the years I've been into RC I've had a single nitro touring car. My experience is all electric (I determined the touring car engine had a serious shaft leak, which made it impossible to start of course. My "repair" was to make a custom motor mount for it and convert it to brushless!! Shows you how much nitro I know!)

Matt, it looks like you know what you're up against, and it sounds like you have enough brain-power to think the problems through and possibly come up with some solutions. I'm rooting for you dude, don't give up.

VID-E-O, VID-E-O, VID-E-O

littleskull99 · 10-21-2008, 03:38 PM

Quote:

Originally Posted by Big Mike

VID-E-O, VID-E-O, VID-E-O

Im on it man!

Matt

BrockGrimes · 10-22-2008, 01:03 AM

Quote:

Originally Posted by littleskull99

Brock, Did yer maxx end up lots heavier?

Matt

A little, I used a marine head on an original .15 pro
I made a radiator from parts off a minifridge.
Used a modified perry pump to move the water.
And used another small fuel tank to hold extra water.
I even installed a small computer fan on the radiator, later.
It cooled it enough and worked fine.

Dropped you a PM.

BrockGrimes · 10-22-2008, 01:22 AM

BTW are those pede drive shafts?
I can recommend some mods to the shafts to
help keep them from twisting and or poping off.
PM me for details. They are secret, lol.

littleskull99 · 10-22-2008, 02:16 AM

No worries brock, The shafts seem fine at the moment. If they do fail then I will upgrade them to maxx shafts.

The VID-E-O is up.

Its only the first run and not on technical lines (excuse excuse expletive!)

http://www.youtube.com/watch?v=4l8zhbnR7lw

Enjoy, and Im sure you guys will let me know what you think.

Matt

wisey_86 · 10-22-2008, 03:26 AM

thats mad well done

TattooKenny · 10-22-2008, 05:15 AM

I think you are off to a great start! Looks like the weight is a issue already. Didn't get to see any side hilling or good climbs in the vid, but it looks like you have the first controlled nitro crawler! My hats off to ya my friend! I'll be watching this thread close

Get some video up of some climbs and side hilling!!!!!

littleskull99 · 10-22-2008, 05:27 AM

^Will do mate, As I said above its just the first video. I have about four tanks through and a few tweaks, since then and its much better. The next video will be longer, closer up, better lines and better rocks.

Weight - Just over 6lbs with a full tank.

Thanks for all the comments.

Matt

Big Mike · 10-22-2008, 07:38 AM

HOLY CRAP!! YEA!!! That was not bad at all. I am most definitely impressed. Great job so far Matt!!!

If you can keep the head temp in check and not have to rebuild the clutch after every run you are well on the way to success.

I was thinking how cool it would be to set something like this up on a 3 channel system with independant control of the brake and some kind of controllable clutch system. So you don't have to depend on motor rpm to open a centrifugal clutch, you engage the clutch yourself w/ a servo.

That would open up a whole new world of driveability, and would allow you to run at lower rpm's, which in turn would lower the motor operating temaperature...

hairba11 · 10-22-2008, 08:22 AM

Nice video, and thanks for reminding me why I haven't driven my savage in over a year, I forgot how annoying the swarm of angry bees sound is.

I liked the recovery, but you could hear the air bubble work it's way through the motor.

Very cool technically though. I like Big Mike's idea though, a spring locked clutch with a 3rd channel servo dissengagement. of course that just means you need 3 hands to steer gas and clutch.

maybe if the clutch servo was also connected to a brake? you could hill hold and rev it to power up an incline.
you could almost use slipper clutches, or actual fiber brake disks for cluth material. bound to be cheaper and easier to change than the shoes.

just some thoughts.

KAIKS · 10-22-2008, 02:28 PM

job well done

Mad Scientist · 10-22-2008, 03:16 PM

At leat you've got everything stuffed in there nicely

ubbb69 · 10-22-2008, 09:32 PM

Matt great job man, I am betting that he is having no clutch issues out of the ordinary. The rpm he is turning should be perfect for 2 shoe clutch set up. Lighter springs or none at all will give you a lower rpm grab and still work well on grip. Lightly sand the bell when you take it off each time.

Little work on the weight placement and you will be golden. Maybe switch to mini servo for throttle as low geared as you are breaking should work with mini servo. Great job man you did it and did it right

Nitro bieng my background in this hobby im really impressed.

10-22-2008, 02:16 AM	#32
littleskull99 Rock Crawler Join Date: Jan 2007 Location: Secret Crawl Location Deep In England Posts: 546	Vid-e-o No worries brock, The shafts seem fine at the moment. If they do fail then I will upgrade them to maxx shafts. The VID-E-O is up. Its only the first run and not on technical lines (excuse excuse expletive!) http://www.youtube.com/watch?v=4l8zhbnR7lw Enjoy, and Im sure you guys will let me know what you think. Matt Last edited by littleskull99; 10-22-2008 at 02:34 AM.

10-22-2008, 05:27 AM	#35
littleskull99 Rock Crawler Join Date: Jan 2007 Location: Secret Crawl Location Deep In England Posts: 546	^Will do mate, As I said above its just the first video. I have about four tanks through and a few tweaks, since then and its much better. The next video will be longer, closer up, better lines and better rocks. Weight - Just over 6lbs with a full tank. Thanks for all the comments. Matt Last edited by littleskull99; 10-22-2008 at 05:32 AM.

LinkBacks (?) LinkBack to this Thread: http://www.rccrawler.com/forum/general-crawlers/140650-nitro-crawler.html
Posted By	For	Type	Date
A nitro crawler, it can be done - VARCOR - Virginia Radio Control Off Roaders	This thread	Refback	10-05-2011 08:37 AM

10-20-2008, 05:04 PM	#21
Grizzly4x4 PapaGriz Yo Join Date: Apr 2004 Location: In the garage building the wife a crawler Posts: 13,137	Now here is a project with potential, I'm very interested to see some video. Looks like a very well thought out first stab at it. I can't see it as a comp crawler but I can see it being alot of fun. Nice work.

10-20-2008, 06:12 PM	#22
cato RCC Addict Join Date: Sep 2007 Location: WHEAT RIDGE, CO Posts: 1,102	Grizz.....my friend, Turn away now....before you are sucked in for good!

10-20-2008, 06:40 PM	#23
run2jeepn I wanna be Dave Join Date: Sep 2005 Location: USA Posts: 11,196	Lets see the Vid.... This is by far the Best job to date....

10-21-2008, 02:23 AM	#24
littleskull99 Rock Crawler Join Date: Jan 2007 Location: Secret Crawl Location Deep In England Posts: 546	Thanks for the props guys. I took this beast out yesterday for some night crawling in the rain. (I couldnt wait for light and dry wether) Got another two tanks through it. The engine is just about run in now and the revs are freeing up nicley. I get about 20 mins from a tank. It needs gearing up slightly, Gonna put a 16t clutchbell on instead of the 15t thats on there. The first lot of footage will be up in the next day or two. Matt

10-21-2008, 02:06 PM	#28
Big Mike I wanna be Dave Join Date: Oct 2006 Location: Martinsburg WV Posts: 2,781	I never thought of a marine head with some kind of pump. That would be cool if it did'nt add an ungodly amount of weight to the chassis. In the back of my mind I've always hoped someone would step up to the plate and build a viable nitro crawler. This is the first "threat" made on the subject that was'nt some kid running his yap about wanting to hack up his Savage. I've thought about it breifly, but in all the years I've been into RC I've had a single nitro touring car. My experience is all electric (I determined the touring car engine had a serious shaft leak, which made it impossible to start of course. My "repair" was to make a custom motor mount for it and convert it to brushless!! Shows you how much nitro I know!) Matt, it looks like you know what you're up against, and it sounds like you have enough brain-power to think the problems through and possibly come up with some solutions. I'm rooting for you dude, don't give up. VID-E-O, VID-E-O, VID-E-O

10-22-2008, 01:22 AM	#31
BrockGrimes Rock Crawler Join Date: Feb 2006 Location: Warner Robins Posts: 803	BTW are those pede drive shafts? I can recommend some mods to the shafts to help keep them from twisting and or poping off. PM me for details. They are secret, lol.

10-22-2008, 03:26 AM	#33
wisey_86 Newbie Join Date: Aug 2007 Location: somewhere near you!!!!! Posts: 10	thats mad well done

10-22-2008, 05:15 AM	#34
TattooKenny Who's your Daddy-0! Join Date: Mar 2008 Location: Augusta Posts: 5,009	I think you are off to a great start! Looks like the weight is a issue already. Didn't get to see any side hilling or good climbs in the vid, but it looks like you have the first controlled nitro crawler! My hats off to ya my friend! I'll be watching this thread close Get some video up of some climbs and side hilling!!!!!

10-22-2008, 07:38 AM	#36
Big Mike I wanna be Dave Join Date: Oct 2006 Location: Martinsburg WV Posts: 2,781	HOLY CRAP!! YEA!!! That was not bad at all. I am most definitely impressed. Great job so far Matt!!! If you can keep the head temp in check and not have to rebuild the clutch after every run you are well on the way to success. I was thinking how cool it would be to set something like this up on a 3 channel system with independant control of the brake and some kind of controllable clutch system. So you don't have to depend on motor rpm to open a centrifugal clutch, you engage the clutch yourself w/ a servo. That would open up a whole new world of driveability, and would allow you to run at lower rpm's, which in turn would lower the motor operating temaperature...

10-22-2008, 08:22 AM	#37
hairba11 RCC Addict Join Date: Mar 2007 Location: St. Louis (High Ridge) Posts: 1,279	Nice video, and thanks for reminding me why I haven't driven my savage in over a year, I forgot how annoying the swarm of angry bees sound is. I liked the recovery, but you could hear the air bubble work it's way through the motor. Very cool technically though. I like Big Mike's idea though, a spring locked clutch with a 3rd channel servo dissengagement. of course that just means you need 3 hands to steer gas and clutch. maybe if the clutch servo was also connected to a brake? you could hill hold and rev it to power up an incline. you could almost use slipper clutches, or actual fiber brake disks for cluth material. bound to be cheaper and easier to change than the shoes. just some thoughts.

Sponsored Links

10-22-2008, 02:28 PM	#38
KAIKS Newbie Join Date: Aug 2008 Location: Honolulu Posts: 7	job well done

10-22-2008, 03:16 PM	#39
Mad Scientist RCC Addict Join Date: Mar 2005 Location: Saginaw Posts: 1,721	At leat you've got everything stuffed in there nicely

10-22-2008, 09:32 PM	#40
ubbb69 Rock Crawler Join Date: Sep 2008 Location: Mid Mo. Posts: 544	Matt great job man, I am betting that he is having no clutch issues out of the ordinary. The rpm he is turning should be perfect for 2 shoe clutch set up. Lighter springs or none at all will give you a lower rpm grab and still work well on grip. Lightly sand the bell when you take it off each time. Little work on the weight placement and you will be golden. Maybe switch to mini servo for throttle as low geared as you are breaking should work with mini servo. Great job man you did it and did it right Nitro bieng my background in this hobby im really impressed.

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Thread: Nitro Crawler