112 replies to this topic

[HarV Wallbanger III]

Very cool idea if the motor shaft will take a hit without bending...

[MSwiss]

Guys use 2mm axles for Eurosports and these cars, shockingly enough, go a fair amount slower. LOL.

[Michael Rigsby]

Mike,
 
This is a great idea and a great design by you and Jerry. This has a whole lot of potential for new 1/32 scale classes where it brings it down to who is the best driver. Great for kids who don't have the attention span to learn how to do gear mesh, tire sizes, final ratio, etc..
 
Kudos... I like this.

[Dennis David]

I can use it on a number of Fly classics that's for sure. It might be a while for the plastic crowd to warm to it if ever but I'm more of a scale hard body fan than a plastic racer.

I definitely want one of these motors. Now if they could come up with Version II with a shorter can that would really be something.

[scaleuser]

Can it be extended to high performance 1/24 scale? Is there a problem having the motor turn forward instead of backwards?

Save me some trouble... because I love the idea.

[Tex]

Pretty cool car!

[Don Weaver]

WOW! No more spec gear ratios!  
 
Don Weaver

[Dennis David]

This might actually be more popular in the UK where there are groups that race commercial type cars but are more open to 1/32.

[SlotStox#53]

Very cool idea!! Neat chassis and very clever running without gears. Wonders how you don't just get wheel spin without gears...

[W. J. Dougherty]

Mike,
 
Any idea on the specs for the motor Jerry is using for this car?? It would seem to me this is a high torque/low RPM motor otherwise it would just spin the tires off the hubs as it went down the track. As cool as it might be I don't see any easy application with the motors we currently have because they rev too high...
 
Come on, Jerry, prove me wrong...

[MSwiss]

I think the first post mentions it's a new motor.

[Gator Bob]

WOW! No more spec gear ratios!  
 
Don Weaver

 
Spec... 1:1 only... LOL.

[HarV Wallbanger III]

Guys use 2mm axles for Eurosports and these cars, shockingly enough, go a fair amount slower. LOL.

Yes but those are drill blank not soft shaft... Like I said cool idea...

[MSwiss]

The shafts on FK motors are excellent.
 
Remember, I ran one 3,411 actual miles.
 
How could have that been done if the shaft was soft?

[MSwiss]

Here's your "soft shaft" after traveling cross-country.
 

[Jairus]

Back when I was in college I designed a planetary gear set inside the motor can, attached to the axle shaft with the arm wound onto a tube over the axle powering the gears. That would allow a sort-of direct drive similar looking to the new JK motor.
 
Never got around to building a prototype.

[Tim Neja]

I'll have to get a couple of those to try on our "home tracks" with Dennis Samson, Phil Nyland, Mill Conroy, and myself!!!  

Ya listening, Jerry??

[HarV Wallbanger III]

I was just saying if the shaft took a hit, Mike, the outside can be hard and not wear while the shaft can bend easy was what I hope does not happen as then the only way to correct is a new motor...

Like I said it is a cool idea...

"Soft shaft" as opposed to a drill blank was what I was talking about. Ask Stu about surface hardness for wear... as compared to shaft deflection... two different things.

Like I said, cool idea.

[MSwiss]

I don't think the cars will go fast enough to bend the shaft.
 
But if they do, just bend it back.
 
I drop my Dremel tool all the time, catching the cord on a chair leg or such, and break the disc and bend the mandrel.
 
I just spin it, mark the high spot, and straighten it.

[Samiam]

This concept would work perfect for a rental car. 1/24 scale with .030" body. Anything beats the rubber band drive Whisper Jet.

[havlicek]

Cool idea, Mike!
 
-john

[SlotStox#53]

Any ideas to rewind one, John?! To see what can be done!

[W. J. Dougherty]

Mike,
 
How much heat is generated in that car? Is the motor winding out to peak RPM? Is it going to be bogged since it can't wind out?
 
Thanks...

[havlicek]

Any ideas to rewind one John?! To see what can be done!

 
I would have enjoyed being part of figuring this all out, Paul, but I'm sure Mike and Jerry have access to waaaaaay more developement than I could muster. Without ever having screwed around with this, it seems like it would be very cool for some applications, but that the advantage gearing provides... both mechanical AND with fine-tuning a car for a specific track and power (i.e. a tooth here and a tooth there) isn't going anywhere. There's also chassis dynamics and for some cars, just having the motor that far back will be a disadvantage. This is basically a super-radical "sidewinder" and it seems that anglewinders long-ago proved more useful.  
 
I could see using a shorter (like a Hawk!) motor to allow more tire if that were needed (seems not!), and it wouldn't be difficult to even go to a 3/32" drill blank shaft. Although as Mike says, the Eurosport guys use 2mm axles out there on the bleeding edge of technology and they seem to work for them. I guess that the motors are wound for lotsa torque and far lower RPMs (obviously)... a bunch of skinny wire and "maybe" a different lam.  

In the end, I applaud the guys who look at slots and say... "Hey, what if we did this?!", and then actually go and do it!
 
-john

[MSwiss]

How much heat is generated in that car? In that car, a fair amount.

 
But, It's not the motor Jerry is using. And it's been soldered in the chassis two times and required quite a bit of heat to get out, the first time.
 

Is the motor winding out to peak RPM?

No, but on my flat track, none do.