RCCrawler Forums

Jeeper · 10-07-2004, 09:14 PM

Anybody agree with me on making wheels have squares or triangles instead of hexes?

Mnster · 10-07-2004, 09:43 PM

I would have to see the benifit to know why. Triangles and squares are far weeker than hexes.

SR5Dave · 10-07-2004, 10:34 PM

Quote:

Originally Posted by Mnster

I would have to see the benifit to know why. Triangles and squares are far weeker than hexes.

A triangle is the strongest geometric shape.

nktrnl · 10-08-2004, 04:21 AM

Quote:

Originally Posted by Jeeper

Anybody agree with me on making wheels have squares or triangles instead of hexes?

no

CrawlinForLife · 10-08-2004, 06:22 AM

Whats wrong with hex's?

Jeeper · 10-08-2004, 07:49 AM

just figured that they wouldn't strip out as easily as hexes.

Ace · 10-08-2004, 07:50 AM

Not so fast guys. I think hex's suck for power transfer. I've seen to many plastic wheels wallered out by the hexs.

They work fine for their original application on a high speed relatively low torque t-maxx type truck. But for crawling I think they are marginal at best.

I could see a big triangle as being advantageous in transfering torque from a metal shaft to a plastic wheel.

sambmx · 10-08-2004, 10:18 AM

triangles and squares would be much better for power transfer. same goes for sockets torqueing something really tight or loosening an old rusted bolt you use a six point instead of a 12 point socket.

the only prob would be machineing the wheels and triangles,or square.

i had the idea of not even using the hexes, just make wheels with a slot for the pin to fit in, eliminating the entire problem.

dabid · 10-08-2004, 12:49 PM

Doesn't Yokomo have funky hubs that fit into their car wheels like that? I seem to remember them kinda looking like a triangle.......anyone else know what I mean?

CrawlinForLife · 10-08-2004, 12:58 PM

Quote:

Originally Posted by sambmx

triangles and squares would be much better for power transfer. same goes for sockets torqueing something really tight or loosening an old rusted bolt you use a six point instead of a 12 point socket.

the only prob would be machineing the wheels and triangles,or square.

i had the idea of not even using the hexes, just make wheels with a slot for the pin to fit in, eliminating the entire problem.

Oh... thats even worse. Anyone who has owned a nitro stadium truck like the RC10GT will agree with me. Nothing worse then destroying a rim with a pin.

I can't say I have EVER seen a Maxx size hex strip out, and I have ran .40 four strokes in Maxx's and everything else. Only way I could see it happening is if a wheel nut came loose or something I guess.

sambmx · 10-08-2004, 03:04 PM

i own an rc10gt, the pins they use are much smaller than maxx size pins also the wheel material and pin slot on gt rims is not the strongest, not close to a maxx wheel.what difference does it make if you distroy it with a hex or a pin, and why would the hex material withstand more than a wheel of equal material.

Ace · 10-08-2004, 03:13 PM

[quote="CrawlinForLife"]

Quote:

Originally Posted by sambmx

I can't say I have EVER seen a Maxx size hex strip out, and I have ran .40 four strokes in Maxx's and everything else. Only way I could see it happening is if a wheel nut came loose or something I guess.

I can show you about 5 of mine that have stripped.

In a crawler you can have one wheel wedged in a rock and have two motors supplying all torque to one hex... I'd bet even that .40 four stroke doesn't have near the final torque of two mag mahems geared 80:1

badger · 10-08-2004, 03:44 PM

Quote:

Originally Posted by CrawlinForLife

I can't say I have EVER seen a Maxx size hex strip out, and I have ran .40 four strokes in Maxx's and everything else. Only way I could see it happening is if a wheel nut came loose or something I guess.

Again, you are talking about a Nitro and not crawling.

I have a F'ed up hex I can show you.

CrawlinForLife · 10-08-2004, 04:36 PM

Guess I have just been lucky with the E crawling so far then. Of course I let off the throttle when a wheel gets wedged

Destroyer · 10-08-2004, 06:02 PM

I have had 3 hexes strip out on my E-Maxx...but then it is 14-16 cell brushless 8O

I even stripped an aluminum hex when a had a rear spool, CVD's and Big Joes. The best solution so far has been to just CA hexes in each wheel instead of reusing them for all my tires.

Destroyer
...got the name for a reason!

:P

MOJOJOJO · 10-12-2004, 01:06 PM

ive had my stock electric stampede and nitro stampede, savage 25, and my e-maxx strip out hexxes and i dont leave my nuts loose...trust me
lol
but yea i think that the farther the drive hub shape is from a circle the better tourque tranfer there will be...

just my opinion

Ian

Falldownboy · 10-13-2004, 04:16 PM

Any merit in doing what the bicycle industry has done? Mountain bikes used to all have square taper cranks and now have almost all gone (starting with big-hit bikes) to splined cranks for stiffness and strength.

Of course that did bring about at least 2 different "standards" for the splined parts.

My thinking would be that if the gears in your tranny aren't stripping, using that interface on your wheel, but using all the teeth at once might work.

JakeDaSnake · 11-07-2004, 04:10 PM

A Triangle would be far weaker than a hex... the more points a shape have to transfer the stress the more torque it can take... so a hex having 6 sides can in theory take twice the stress a tiangle one having 3 sids could take... yea just like the "Octa-link" on mountain bikes and 8 plined shaft insead of a square shaft....

Later
Jake

phillyb · 11-08-2004, 09:14 PM

well this has already been discussed by the unlimited engineering guys, robin was ripping out hexes on every run. apparently a C5 strapped to a razorback was more than enough power to rip out hexes.

then he got alu wheels made, no more stripped hexes. this is an expensive and heavy solution though.

also proline is making 23mm hexes,

http://www.prolineracing.com/proline...hex-system.htm

not sure if that will help but oh well.

JasonInAugusta · 11-08-2004, 09:58 PM

Unlimited Engineering's fix was to get rid of the cross pin in the axle.

He did this by making the section of the axle that protrudes from the bearings hex shaped. The actual hex that fits into the wheel fits onto this hex axle shaft.

The assembly is the absolute strongest axle/hex assembly I've seen for RC.

Doesn't do much for plastic wheels though.

Pro-Line's 23mm hex wheel is a cool idea, you increase the surface area, which spreads the load over a larger area.

The downside is that you're forced to use Pro-Line's wheels for the 23mm hexes. It's a sure-fire way to limit your wheel choices.

You'll also transfer the load to the axle's cross pin, which I've snapped several of with a metal, standard size, 14mm hex.

10-07-2004, 09:14 PM	#1
Jeeper Rock Stacker Join Date: Aug 2004 Location: wasatch front Posts: 77	triangles/squares instead of hexes Anybody agree with me on making wheels have squares or triangles instead of hexes?

10-07-2004, 09:43 PM	#2
Mnster MWRCA'er Join Date: Apr 2004 Location: Machesney Park IL Posts: 3,995	Re: triangles/squares instead of hexes I would have to see the benifit to know why. Triangles and squares are far weeker than hexes.

10-08-2004, 06:22 AM	#5
CrawlinForLife Quarry Creeper Join Date: Sep 2004 Location: Michigan Posts: 240	Re: triangles/squares instead of hexes Whats wrong with hex's?

10-08-2004, 07:49 AM	#6
Jeeper Rock Stacker Join Date: Aug 2004 Location: wasatch front Posts: 77	Re: triangles/squares instead of hexes just figured that they wouldn't strip out as easily as hexes.

10-08-2004, 07:50 AM	#7
Ace Rock Crawler Join Date: Apr 2004 Location: Longmont, CO Posts: 901	Re: triangles/squares instead of hexes Not so fast guys. I think hex's suck for power transfer. I've seen to many plastic wheels wallered out by the hexs. They work fine for their original application on a high speed relatively low torque t-maxx type truck. But for crawling I think they are marginal at best. I could see a big triangle as being advantageous in transfering torque from a metal shaft to a plastic wheel.

10-08-2004, 10:18 AM	#8
sambmx Pebble Pounder Join Date: Aug 2004 Location: orange county n.y. , building the hydro crawler Posts: 195	Re: triangles/squares instead of hexes triangles and squares would be much better for power transfer. same goes for sockets torqueing something really tight or loosening an old rusted bolt you use a six point instead of a 12 point socket. the only prob would be machineing the wheels and triangles,or square. i had the idea of not even using the hexes, just make wheels with a slot for the pin to fit in, eliminating the entire problem.

10-08-2004, 12:49 PM	#9
dabid Quarry Creeper Join Date: Aug 2004 Location: HP lounge Posts: 289	Re: triangles/squares instead of hexes Doesn't Yokomo have funky hubs that fit into their car wheels like that? I seem to remember them kinda looking like a triangle.......anyone else know what I mean?

10-08-2004, 03:04 PM	#11
sambmx Pebble Pounder Join Date: Aug 2004 Location: orange county n.y. , building the hydro crawler Posts: 195	Re: triangles/squares instead of hexes i own an rc10gt, the pins they use are much smaller than maxx size pins also the wheel material and pin slot on gt rims is not the strongest, not close to a maxx wheel.what difference does it make if you distroy it with a hex or a pin, and why would the hex material withstand more than a wheel of equal material.

10-08-2004, 04:36 PM	#14
CrawlinForLife Quarry Creeper Join Date: Sep 2004 Location: Michigan Posts: 240	Re: triangles/squares instead of hexes Guess I have just been lucky with the E crawling so far then. Of course I let off the throttle when a wheel gets wedged

10-08-2004, 06:02 PM	#15
Destroyer Rock Crawler Join Date: Apr 2004 Location: North GA Posts: 824	Re: triangles/squares instead of hexes I have had 3 hexes strip out on my E-Maxx...but then it is 14-16 cell brushless 8O I even stripped an aluminum hex when a had a rear spool, CVD's and Big Joes. The best solution so far has been to just CA hexes in each wheel instead of reusing them for all my tires. Destroyer ...got the name for a reason! :P

10-12-2004, 01:06 PM	#16
MOJOJOJO Rock Stacker Join Date: Mar 2004 Posts: 62	Re: triangles/squares instead of hexes ive had my stock electric stampede and nitro stampede, savage 25, and my e-maxx strip out hexxes and i dont leave my nuts loose...trust me lol but yea i think that the farther the drive hub shape is from a circle the better tourque tranfer there will be... just my opinion Ian

10-13-2004, 04:16 PM	#17
Falldownboy Newbie Join Date: Sep 2004 Posts: 20	Re: triangles/squares instead of hexes Any merit in doing what the bicycle industry has done? Mountain bikes used to all have square taper cranks and now have almost all gone (starting with big-hit bikes) to splined cranks for stiffness and strength. Of course that did bring about at least 2 different "standards" for the splined parts. My thinking would be that if the gears in your tranny aren't stripping, using that interface on your wheel, but using all the teeth at once might work.

11-07-2004, 04:10 PM	#18
JakeDaSnake Quarry Creeper Join Date: Feb 2004 Location: Mobile AL Posts: 217	Re: triangles/squares instead of hexes A Triangle would be far weaker than a hex... the more points a shape have to transfer the stress the more torque it can take... so a hex having 6 sides can in theory take twice the stress a tiangle one having 3 sids could take... yea just like the "Octa-link" on mountain bikes and 8 plined shaft insead of a square shaft.... Later Jake

11-08-2004, 09:14 PM	#19
phillyb Rock Crawler Join Date: Nov 2004 Location: roanoke Posts: 550	Re: triangles/squares instead of hexes well this has already been discussed by the unlimited engineering guys, robin was ripping out hexes on every run. apparently a C5 strapped to a razorback was more than enough power to rip out hexes. then he got alu wheels made, no more stripped hexes. this is an expensive and heavy solution though. also proline is making 23mm hexes, http://www.prolineracing.com/proline...hex-system.htm not sure if that will help but oh well.

11-08-2004, 09:58 PM	#20
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	Re: triangles/squares instead of hexes Unlimited Engineering's fix was to get rid of the cross pin in the axle. He did this by making the section of the axle that protrudes from the bearings hex shaped. The actual hex that fits into the wheel fits onto this hex axle shaft. The assembly is the absolute strongest axle/hex assembly I've seen for RC. Doesn't do much for plastic wheels though. Pro-Line's 23mm hex wheel is a cool idea, you increase the surface area, which spreads the load over a larger area. The downside is that you're forced to use Pro-Line's wheels for the 23mm hexes. It's a sure-fire way to limit your wheel choices. You'll also transfer the load to the axle's cross pin, which I've snapped several of with a metal, standard size, 14mm hex.

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