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Slot car - propeller-driven


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#1 Dallas Racer

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Posted 13 April 2018 - 09:23 AM

This is interesting.
 
Slot Car - Propeller-Driven

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#2 Dallas Racer

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Posted 18 April 2018 - 09:28 PM

What happened to this thread? I had posts in it, including Jairus's car which I wanted to comment on.


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#3 Dallas Racer

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Posted 18 April 2018 - 09:32 PM

And this thread isn't listed anywhere but in the "recent post" list.

 

It seems my writings aren't given the respect they deserve.  :laugh2:


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#4 Jairus

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Posted 18 April 2018 - 09:43 PM

This car?

Comment away.

2vhTcUrqxubMLY.jpg
 
2vhCUFpnxubMLY.jpg

Jairus H Watson - Artist
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#5 Dallas Racer

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Posted 18 April 2018 - 09:49 PM

Yes! That's awesome. You should finish it.  :good:


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#6 Jairus

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Posted 18 April 2018 - 09:59 PM

I hope to. Been busy.

Working on a braking system.
Key ingredients are low center of gravity and good brakes.   
Losing the front wheels, too.

Jairus H Watson - Artist
Need something painted, soldered, carved, or killed? - jairuswtsn@aol.com

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#7 Cheater

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Posted 19 April 2018 - 03:50 AM

It seems my writings aren't given the respect they deserve.  :laugh2:


Phil,

To keep from overwhelming the Recent Topics 'repeater,' the RSS eBay feeds are set not to appear in that list.

I'll move your thread to where it will appear in Recent Topics.

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Never forget that first place goes to the racer with the MOST laps, not the racer with the FASTEST lap


#8 gotboostedvr6

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Posted 19 April 2018 - 09:30 AM

That APC prop is not the best choice for this project. The root thickness and airfoil were designed to be used over 30,000 rpm and need 400 to 800 watts and sufficient airspeed be efficient. Using them in a slot car would put them in a full stall; this condition will produce insufficient thrust.

There are several GWS props that would serve you better. I'll work on a list and post later.

You're not gonna want to have to use a propeller adapter. Best to use a prop with a 1.5mm hole and drill it to 2mm for a direct fit. You can add a set screw to keep it in place.


Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. - Ronald Regan #40 (1911 - 2004)

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#9 Phil Hackett

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Posted 19 April 2018 - 10:05 AM

Think gyroscope if you're going to run that on a "road" track. It'll make turns one way **really** well.... the opposite turns... not so good... but it'll be fun to build. Another thing: it'll tend to run up on two wheels while accelerating and firmly plant down as soon as you brake.

 

Ask Dennis Hill about his "Air Car" from the 1980s. It was a fun thing to watch. I think he used a 3-bladed 6" prop on that car.

 

(edit-- I was informed it was a 3" 3blade prop)


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#10 MSwiss

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Posted 19 April 2018 - 10:46 AM

I thought a Slots of Fun racer posted a video, here, of a propeller driven drag car.

I thought it looked pretty speedy.

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#11 Jairus

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Posted 19 April 2018 - 10:48 AM

Well, the other option was a couple of turbine fans under the body running counter to one another.  This would create a huge suction effect keeping the car on the track.
The reason it never got finished, was because I had NOT figured out all the problems.


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#12 MSwiss

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Posted 19 April 2018 - 11:08 AM


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Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#13 Jairus

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Posted 19 April 2018 - 11:15 AM

How about something like this?
https://www.towerhob...p?&I=LXBWMA&P=M

 


Jairus H Watson - Artist
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#14 Jairus

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Posted 19 April 2018 - 11:19 AM

Or this with a nice high rev motor by Havlicek?
https://www.towerhob...p?&I=LXLXA2&P=7


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#15 Foamy

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Posted 19 April 2018 - 11:59 AM

The drag strip at Valley Raceway in Rosemead, CA, had no timing equipment and crappy no-traction paint. The locals were making fan-powered dragsters using motors from electric drills. I made one using an off-road R/C motor from the late Big Jim. An Astro Flight prop adapter held a Cox three-blade prop. It was unbeaten for about a year until... Guy Spaulding made one with two Group 20 motors and he carved a couple 1-1/2" props for it.
 
fan.jpg

This one is 1.9" diameter and flow a lot of air.


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Dennis Hill
 
"Just once I want my life to be like an '80s movie,
preferably one with a really awesome musical number for no apparent reason."

#16 Jairus

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Posted 19 April 2018 - 12:18 PM

I like it Dennis!

(Can I have it?)


Jairus H Watson - Artist
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Check out some of the cool stuff on my Fotki!


#17 Foamy

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Posted 19 April 2018 - 03:38 PM

Send me your address. You will need to drill a hole for the shaft.


Dennis Hill
 
"Just once I want my life to be like an '80s movie,
preferably one with a really awesome musical number for no apparent reason."

#18 Jairus

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Posted 19 April 2018 - 05:43 PM

Seriously?
PM coming. Thank you, Dennis.
 


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#19 Cheater

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Posted 19 April 2018 - 07:20 PM

It was unbeaten for about a year until... Guy Spaulding made one with two Group 20 motors and he carved a couple 1-1/2" props for it.


Dennis,

Is this the dragster to which you refer?

 

gd2.jpg

 

gd3.jpg

 

g1.jpg

 

I've been waiting years to post these pics, which I took when I visited Guy and his lovely wife at their home in Winston-Salem...


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Gregory Wells

Never forget that first place goes to the racer with the MOST laps, not the racer with the FASTEST lap


#20 gotboostedvr6

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Posted 19 April 2018 - 07:41 PM

Wait, Guy made something cool?

 

Greg, you must have him mixed up with another blogger!


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Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. - Ronald Regan #40 (1911 - 2004)

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#21 gotboostedvr6

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Posted 19 April 2018 - 07:54 PM

Using this propeller with estimated 30% slip, 30,000 RPM, will produce 20 MPH.
 
GWS EP Propeller (DD-2510 65x25mm)
Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. - Ronald Regan #40 (1911 - 2004)

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#22 gotboostedvr6

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Posted 19 April 2018 - 07:56 PM

Using this propeller with estimated 40% slip, 30,000 RPM, will produce 34 MPH.
 
GWS EP Propeller (DD-3020 82x50mm)
Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. - Ronald Regan #40 (1911 - 2004)

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#23 Foamy

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Posted 23 April 2018 - 11:48 AM

That's it! Or something like it. I remember wood props though...
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Dennis Hill
 
"Just once I want my life to be like an '80s movie,
preferably one with a really awesome musical number for no apparent reason."

#24 Guy Spaulding

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Posted 23 April 2018 - 12:42 PM

This is interesting.
 
Slot Car - Propeller-Driven

I think this is the link you're talking about. 


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#25 Guy Spaulding

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Posted 23 April 2018 - 12:53 PM

The recent car worked ok on straight battery power, but torqued over too much with 14v.

 

Attached File  New Bladerunner.wmv   244.88KB   13 downloads


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