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Results! "NorCal V-Town Rumble" In Memory of Gene Husting - Drag Proxy


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#1 dc-65x

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Posted 15 September 2014 - 03:57 PM

"NorCal V-town Rumble"
In Memory of Gene Husting - Drag Proxy

 

FINAL RESULTS!  from  EDDIE'S SLOT CAR WORLD

 

(Pictures and text thanks to Rodney Chew)

 

THE ENTRANTS!

 

entrants1.jpg

 

What a great turnout! :good:

 

entrants2.jpg

 

The first results are for the "Big Dogs" - D-DRAGSTER

 

Here's the field:

 

Dragster entries.jpg

 

Fred Pierpoint - Low ET in class

 

1.247 ET @ 44.39 MPH

 

Original dragster restored and completed. Runs smooth and fast. Effortless looking down the strip. At 44 MPH hard to stop. Aluminum body dragster. Magnesium frame rails. Ram 857 with 3 volt armature.

 

Fred Dragster (800x450).jpg

 

Fred Dragster2 (800x450).jpg

 

Dave Cummerow

 

1.351 ET @ 42.33 MPH

 

Dragster #1.  Repro K&B dragster frame, Strombecker Destroyer motor rewound by Havlicek. Very smooth dragster.

 

Dave Cummerow Dragster #1 track view (800x450).jpg

 

Dave Cummerow Dragster #1 bottom (800x450).jpg

 

Johnny MacCall

 

1.503 ET @ 38.63 MPH

 

Multi-gear dragster. Vintage dragster. Lots of gears spinning with this one.

 

Johnny MAC Multi gear dragster (800x450).jpg

 

Johnny MAC Multi gear dragster rear (800x450).jpg

 

Rodney Chew

 

1.598 ET @ 35.78 MPH

 

Aluminum body and chassis. Short wheelbase. Stock Pittman 84-6 that has been blueprinted. Fast car for stock motor.

 

Aluminum body dragster short wheel base Rodney (800x450).jpg

 

Aluminum bodied dragster short wheel base2 Rodney (800x450).jpg

 

Paul Bass

 

Aluminum-bodied Texas dragster.

 

1.611 ET @ 32.41 MPH

 

Car wired "reverse" of our track and we first launched it backwards off the line! No damage other than body popped off. Another very smooth dragster. Geared just right. Went faster second weekend.

 

Aluminum bodied Texas Dragster Paul Bass (800x450).jpg

 

Aluminum bodied Texas Dragster2Paul Bass (800x450).jpg

 

Ron Steege

 

1.652 ET @ 32.05 MPH

 

"Canopy" dragster. Original dragster restored. Very smooth running car. Another car with effortless-looking runs.Front wheels slightly up when launching off the line. Perfect weight transfer. Magnesium frame rails. Ram 857 with a 6 volt armature. 

 

Canapy Dragster Ron (800x450).jpg

 

Canapy dragster2 Ron (800x450).jpg

 

Bill Bilancio

 

1.829 ET @ 29.90 MPH

 

"Chrome" body dragster. Very smooth and geared just right. Magwinder style dragster.

 

chrome dragster magwinder style Bill Bilancio (800x450).jpg

 

chrome dragster magwinder style2 Bill Bilancio (800x450).jpg

 

chrome dragster magwinder style3 Bill Bilancio (800x450).jpg

 

Rodney Chew

 

1.894 ET @ 27.06 MPH

 

Orange bodied dragster. Runs out of speed at the end of the strip. Armature tired? Pittman 85 with a 6 volt Ram armature.

 

Rodney Orange bodied dragster (800x450).jpg

 

Orange bodied dragster2 Rodney (800x450).jpg

 

 Paul Bass

 

1.894 ET @ 26.44 MPH

 

Brass dragster. Pittman or Ram motor. We knew to reverse the wires on this one. Nice-running dragster. Second weekend run was faster.

 

Paul Bass Brass dragster (800x450).jpg

 

Charles Carnell

 

2.473 ET @ 29.33 MPH

 

Blue Fiat dragster. Kemtron 503 motor with K&B frame rails. This car tried to kill the house controller. We tested the car on the power supply and all seemed OK. On the first run there was a fireball from the front of the car and the controller. I added some electrcal tape to the frame. Our driver got three runs in with lots of sparks while going down the strip. Great-looking dragster.

 

Charles Carnell Blue Fiat Dragster D Dragster on track (800x450).jpg

 

Charles Carnell Blue Fiat Dragster D Dragster bottom (800x450).jpg

 

Johnny MacCall

 

2.627 ET @ 16.08 MPH 

 

Brass chassis. Kemtron 503 12 volt powered dragster. Blown Ford plastic engine. Could probably use different gearing and zapping the motor would help.

 

Brass chassis Kemtron Johnny MAC (800x450).jpg

 

Brass chassis Kemtron2 Johnny MAC (800x450).jpg

 

Johnny MacCall

 

2.732 ET @ 21.82 MPH

 

Green bodied dragster. Pittman motor with brass frame. Runs straight.

 

Johnny MAC Green bodied dragster on track (800x450).jpg

 

Johnny MAC Green bodied dragster bottom (800x450).jpg


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#2 dc-65x

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Posted 15 September 2014 - 04:32 PM

A-ALTERED
 
Here's (most of) the field:
 
A Altered.jpg
 
Bill Bilancio - Fasted ET in class
 
1.711 ET @ 31.62 MPH
 
Yellow Fiat. Pittman motor with modified Dynamic frame. Very smooth-running car. Good power. Faster first weekend.
 
yellow fiat pittman w-dynamic frame Bill Bilancio (800x450).jpg
 
yellow fiat pittman w-dynamic frame2 Bill Bilancio (800x450).jpg
 
Dave Cummerow
 
1.752 ET @ 29.05 MPH
 
Orange '32 Ford roadster. WFO. Checkered Flag chassis, Kemtron powered. Car hooks up.
 
Dave Cummerow Orange '32 ford roadster A Altered on track (800x450).jpg
 
Dave Cummerow Orange '32 ford roadster A Altered bottom (800x450).jpg
 
John Burgos
 
1.881 ET @ 29.66 MPH
 
'32 Ford Orange Krate. Large Tradeship motor, wire and brass chassis. After a week of totally rebuilding the chassis and three gear sets later, the car runs very smooth and fast.
 
John Burgos '32 Ford Orange Krate A Altered on track (800x450).jpg
 
John Burgos '32 Ford Orange Krate A Altered bottom (800x450).jpg
 
Ron Steege
 
1.970 ET @ 22.28 MPH
 
'32 Ford. Resin colored. Work in progress. Tradeship motor with Dynamic chassis. Fast with torque monster motor.
 
'32 Ford A-Altered Ron (800x450).jpg
 
'32 Ford A-Altered2 Ron (800x450).jpg
 
Rodney Chew
 
2.0001 ET @  22.37 MPH
 
Yellow '34 Ford. Kemtrom 503 motor with Ram 8 volt armature. Custom brass chassis.Changed gearing second weekend and went .4 seconds faster.

 
Rodney Yellow '34 Ford now in A-Altered class on track (800x450).jpg
 
Rodney Yellow '34 Ford now in A-Altered class bottom (800x450).jpg
 
Rodney Chew
 
2.032 ET @ 23.82 MPH
 
Green hot rod. Slight wheel spin down the strip hurts times. Wrong compound tires.

 
green hot rod a-altered rodney (800x450).jpg
 
green hot rod a-altered2 rodney (800x450).jpg
 
Johnny MacCall
 
2.049 ET @ 26.04 MPH
 
Red Bantam. Blown Hemi. K&B Challenger motor with brass frame. Car looks great going down the strip. Car does wheelies.

 
Rede Bantam A Altered Johnny MAC (800x450).jpg
 
Rede Bantam A Altered2 Johnny MAC (800x450).jpg
 
Johnny MacCall
 
2.769 ET @ 18.72 MPH
 
Silver and black roof Moon Equipped hot rod. Kemron motor and Dynamic frame. Good-looking vintage hot rod.

 
Johnny MAC Silver and black roof Moon Equiped hot rod A Altered on track (800x450).jpg
 
Johnny MAC Silver and black roof Moon Equiped hot rod A Altered bottom (800x450).jpg


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#3 dc-65x

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Posted 15 September 2014 - 04:52 PM

G-GAS

 

Here's the field:

 

G-Gas.jpg

 

Rodney Chew - Fastest ET in class

 

1.595 ET at 34.01 MPH

 

Red, white, and Blue Plymouth. Highly-modified Pittman 85 with 6 volt Ram armature. Brass chassis. Good weight transfer off the line with front wheels slightly rising off the track. Strong motor. Second weekend run was faster.

 

Red white blue Plymouth G Gas Rodney (800x450).jpg

 

Red white blue Plymouth G Gas2 Rodney (800x450).jpg

 

Rodney Chew

 

1.692 ET at 33.61 MPH

 

Blue Willys. Ram 850 with Captain Rick 6 volt Ram armature. Kemtron kit frame. Car hooks up. Great power.

 

Blue Willys RAM850 G-GAS Rodney (800x450).jpg

 

Blue Willys RAM850 G-GAS2 Rodney (800x450).jpg

 

Rodney Chew

 

1.734 ET at 31.46 MPH

 

Black '55 Chevy. Ram 850 6 volt motor integrated into aluminum chassis. Launches hard. Lots of weight transfer. Exciting-looking car going down the strip.

 

Black 55 Chevy G Gas Rodney (800x450).jpg

 

Black 55 Chevy G Gas2 Rodney (800x450).jpg

 

Black 55 Chevy G Gas3 Rodney (800x450).jpg

 

Johnny MacCall

 

1.943 ET @ 2.469 MPH

 

Red and white '53 Ford. Kemtron motor with Dynamic chassis. Good-looking car that is fast.

 

Johnny MAC red and white '53 ford G Gas on track (800x450).jpg

 

Johnny MAC red and white '53 ford G Gas bottom (800x450).jpg

 

Rodney Chew

 

1.946 ET @ 27.53 MPH

 

Grey Ford Falcon. Stock Pittman 65-6 motor. Brass frame. Great bracket car. Very consistent. Geared just right.

 

Grey Ford Falcon G GAS Rodney (800x450).jpg

 

Grey Ford Falcon G GAS2 Rodney (800x450).jpg

 

Johnny MacCall

 

2.041 ET @ 25.37 MPH

 

'41 Willys Gasser. Black and red primer. Kemtron motor and chassis. As Johnny says, the car goes down the strip perfectly straight even though the chassis looks bent. Car does wheelies. Faster second weekend.

 

'41 willys gasser black red primer johnny mac (800x450).jpg

 

'41 willys gasser black red primer2 johnny mac (800x450).jpg

 

Bill Bilancio

 

2.16 ET @ 21.38 MPH

 

Red Willys. Large Kemtron motor with brass chassis. Very nice car with out of round rear tires. With trued tires and with a different compound the car would be much faster.

 

red willys g-gas bill bilancio (800x450).jpg

 

red willys g-gas2 bill bilancio (800x450).jpg

 

Johnny MacCall

 

2.278 ET @ 19.73 MPH

 

Blue and white '51 Chevy Belair. Kemtron motor and Kemtron kit chassis. Smooth running car that does wheelies. Faster run second weekend.

  

Blue and white chevy belair G GAS Johnny MAC (800x450).jpg

 

Blue and white chevy belair G GAS2 Johnny MAC (800x450).jpg

 

Johnny MacCall

 

2.515 ET @ 23.04 MPH

 

Grey '55 Chevy. Kemtron motor and frame. Runs straight.

 

Johnny MAC Grey '55 chevy G Gas on track (800x450).jpg

 

Johnny MAC Grey '55 chevy G Gas bottom (800x450).jpg

 

Charles Cornell

 

2.604 MPH @ 21.63 MPH

 

Purple '41 Chevy. Dynamic chassis with Pittman RP66. Smooth-running car.

 

Charlezs Cornell Purple '41 chevy G Gas on track (800x450).jpg

 

Charlezs Cornell Purple '41 chevy G Gas bottom (800x450).jpg

 

Johnny MacCall

 

2.686 ET @ 16.88 MPH

 

Yellow and black Henry J. Kemtron motor and brass chassis. Pops wheelies.

 

Johnny MAC Yellow and black henry J G Gas on track (800x450).jpg

 

Johnny MAC Yellow and black henry J G Gas bottom (800x450).jpg


Rick Thigpen
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#4 dc-65x

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Posted 15 September 2014 - 05:24 PM

SC SPORTS CAR

 

Captain Rick Thigpen - Fastest ET in class

 

1.473 ET @40.06 MPH

 

Black 427 King Cobra. Brass chassis. Car is a work in progress. Still needs "King Cobra" decals and clear coat. Ram 850 with 3 volt armature. Car launches straight and really hooks up. Very fast and smooth running car.

 

Black 427 Cobra sports car Captain Rick (2).jpg

 

Black 427 Cobra sports car Captain Rick (4).jpg

 

Black 427 Cobra sports car Captain Rick (1).jpg

 

Another car that's hard to stop. Here it is buried in the "parachute"!

 

Black 427 Cobra sports car Captain Rick (3).jpg

 

Dave Cummerow 

 

1.887 ET @ 28.71 MPH

 

Orange Ferrari. Dynamic chassis with Ram 426 motor. Nice-running car originally built for road course use.

 

Dave Cummerow Orange Ferrari sc sports car on track.jpg

 

Dave Cummerow Orange Ferrari sc sports car bottom.jpg

 

Rodney Chew

 

1.955 ET @ 23.57 MPH.

 

Orange Corvette. Brass chassis. KTM 8 volt motor. Squirrelly down the straight. Looks exciting going down the strip.

 

Corvette Sports Car Rodney.jpg

 

Corvette Sports Car2 Rodney.jpg

 

S-STOCK

 

Rodney Chew - Fastest ET in class

 

1.656 ET @ 30.22 MPH

 

Blue-colored '62 Ford. KTM blueprinted motor. Kemtron kit brass chassis. Launches very hard off the line. Noisy gears.

 

Blue '62 Ford S STOCK2 Rodney.jpg

 

Blue '62 Ford S STOCK Rodney.jpg

 

Rodney Chew

 

1.856 ET @ 30.39 MPH

 

'62 red Pontiac. Ram 850 motor. Kemtron kit chassis. Car launches nice off the line with the front wheels raising just a little for proper weight transfer.

 

'62 pontiac S Stock Rodney.jpg

 

'62 pontiac S Stock 2 Rodney.jpg

 

D van Moppes

 

2.047 ET @ 30.25 MPH

 

Green Mercury Marauder, space frame chassis with Pittman 65-6 motor. Car looks great going down the strip. Some braid arcing.

 

D Van Green Mercury Marauder S Stock on track.jpg

 

D Van Green Mercury Marauder S Stock bottom.jpg

 

 

1/32 NON-SCALE DRAGSTER

 

Dave Cummerow

 

1.502 ET @36.80 MPH

 

Homemade wire chassis. WFO body. Pittman 196B powered. Very smooth dragster.

 

Dave Cummerow 1-32nd scale Dragster track.jpg

 

Dave Cummerow 1-32nd scale Dragster bottom.jpg

 

 

1/32 SCALE DRAGSTER

 

Rodney Chew

 

2.018 ET @ 24.54 MPH

 

Black '55 Chevy. Sideways off the line then hooks up. Stock Pittman 196A motor. Production brass frame.

 

1-32 '55 chevy Rodney.jpg

 

1-32 '55 chevy 2 Rodney.jpg


Rick Thigpen
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There's much more to come...


#5 dc-65x

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Posted 15 September 2014 - 06:09 PM

AWARDS
 
BEST ENGINEERED AWARD
 
Bill Bilancio's magwinder style dragster
 
chrome dragster magwinder style3 Bill Bilancio (800x450).jpg

 
BEST CONSTRUCTED AWARD
 
Captain Rick Thigpen's 427 King Cobra
 
King Cobra (47).jpg
 
1 002 (800x600).jpg

 
FASTEST THREE CARS OF THE MEET
 
Fastest three.jpg
 
Fred Pierpoint's dragster - 1.247 ET @ 44.39 MPH
 
Fred Dragster (800x450).jpg
 
Dave Cummerow's dragster - 1.351 ET @ 42.33 MPH
 
Dave Cummerow Dragster #1 track view (800x450).jpg
 
Captain Rick Thigpen's 427 King Cobra - 1.473 ET @ 40.06 MPH
 
Black 427 Cobra sports car Captain Rick (2).jpg
 
 

RAFFLE PRIZES AND DONATIONS
 
donations door prizes.jpg
 
Thanks to everyone that donated!!!
 
Rick Bennardo of R-Geo Products donated a blue anodized vintage style dragster frame won by Captain Rick Thigpen.
 
scrgeo@comcast.net with inquiries.
 
Bill Bilancio with B. A. Duelly's Racing donated the aluminum set-up block won by Charles Cornell. Bill also donated a two injector sets won by Rodney Chew and Johnny MacCall.
 
www.badracing9.com
 
DVan donated s Stombecker Devestator motor won by Dave Cummerow and also donated K&B parts won by Paul Bass and Bill Bilancio.
 
Rodney Chew donated the event plaques...
 
Event plaques.jpg
 
... and Johnny MacCall and son donated the time slips and time sheets used to keep track of the event.
 
Johnny MAC and Son time slips.jpg
 
Also thanks to the owners of Slot Car World – Eddie and Janet. They cleaned the track multiple times after the earthquake to make the track perfect for the event.
 
Until next time, guys,
 
Rodney
 
until next time....jpg
 

For all DVan’s results of the Rumble on Bracket 500 click HERE.


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#6 SlotStox#53

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Posted 15 September 2014 - 07:23 PM

Congratulations to everyone. Great cars and some great ETs!!! :D



#7 Gator Bob

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Posted 15 September 2014 - 08:06 PM

Great turn-out, very nice cars and great reporting. :good:

 

It's all there! :victory:

 

What was the voltage?


Bob Israelite

#8 SlotStox#53

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Posted 15 September 2014 - 09:17 PM

From what I remember, Bob, in the main thread they mentioned it being 16v with one cap.  :good:



#9 boxerdog

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Posted 15 September 2014 - 09:20 PM

Thanks to the V-Town crew for a great event.

 

Bob, I think the voltage was 16.0-16.2v?? Or that is what I think I heard?? I know it is a battery/cap combo.


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#10 dc-65x

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Posted 15 September 2014 - 09:36 PM

Hi Bob,
 
Here's the word from Rodney,
 
"Some said 18 volts. I had Eddie check the voltage. Eddie measured 16.1 volts with his voltmeter."
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#11 BillB

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Posted 16 September 2014 - 09:34 AM

Congratulations to everyone who participated in this great race!!!

Thanks to Rodney and DVan for making it happen and to Eddie's Slot Car World for hosting the event, also a great job Rick on the write-ups. Love that Cobra!!! 

Thanks to all for their donations; the winners will enjoy them.
 
It's been a lot of fun and I'm looking forward to next year's event. :good:
Bill Bilancio

#12 hiline2

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Posted 16 September 2014 - 02:42 PM

Thanks to all who put up with  "tuning" cars to run better (not backwards)!  Love all the cars entered!  

 

The Multi-gear rail is so cool. How many gears, ratio, etc.??


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#13 DVan

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Posted 16 September 2014 - 05:49 PM

Track: 1/4 mile. Power 16.2 volts. 1 cap.

 

Hiline, I will check with Johnny Mac with your question. It might take me a few days to get back to you...

 

 DVan


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#14 dc-65x

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Posted 16 September 2014 - 06:35 PM

The Multi-gear rail is so cool.

 
I love it too, Paul. I asked Rodney about it. He said it is a time capsule lifted right from "the day" and raced without much prep and it still ran strong.
 
I like the idea of moving the motor forward a bit to help keep the nose down. I know Weldun gears and ball bearings can really be set up smooth as silk. My six-wheel racer's set up is super smooth:
 

Thanks guys. :) I was going to do wheels and tires next but I just couldn't resist setting up the rear end. It's a ball bearing salesman's dream come true:
 
6-wheeler048.jpg
 
It's an all vintage Weldun affair with a 48 pitch crown and 64 pitch spurs and idler gears. The 64P mesh smooth as silk:
 
6-wheeler050.jpg
 

 

Hope DVan can get some more info on it for us both! :victory:


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#15 hiline2

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Posted 16 September 2014 - 08:54 PM

Just way too cool!! :dance3:


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#16 gluebomb

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Posted 16 September 2014 - 09:24 PM

Wow, some real beauties in there!


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#17 DVan

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Posted 18 September 2014 - 11:29 AM

OK, let's see if I can get this to work.
 
Multi-Gear Dragster:
 
mg9.jpg
Right hand side
 
mg7.jpg
Left hand side
 
mg1.jpg
Left side brass screws hold gear cover, gears look to be pinion 38 - large gear 60-62
 
mg2.jpg
Underside of gear area, smaller around 24 teeth, larger one 34-36 to rear axle.
 
mg3.jpg
Right hand side, underside close-up look.
 
mg5.jpg
Top view of motor and gears area. All axles seem to have ball bearings.
 
mg8.jpg
Top view, driver, motor, gears, and rear axle.
 
This dragster seems to be a factory-made chassis. John MacCall thinks it is. we're trying to determine if this chassis is either homemade or a factory chassis, as well as what kind of motor the dragster has? Any help with this information would be greatly appreciated.

Gearing is and these are approximations of the gears we can see, the chassis is epoxied together so taking this dragster apart for further review at this time is impossible. It runs in ther 1.4-1.5 sec range.

Gears are
Pinion 38 - 60 or 62 - 24 - 34 or 36 rear axle. What would be the final gear ratio for this dragster?
 
This all the information I have on this particular dragster, if you would like share some information, either post it on here, or email me at bracket500@live.com.
 
Thanks,

 

DVan


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#18 Uncle Fred

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Posted 18 September 2014 - 11:55 AM

I made a number of Magwinders back in the late '60s. The last one was an idler gear one like this.

 

I can tell you for certain that this is not a factory-made chassis. No one manufactured even a true Magwinder let alone an idler gear car. 

 

Very interesting car.


Fred Correnti

#19 DVan

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Posted 18 September 2014 - 12:27 PM

Uncle Fred, for what reason would you have an idler gear? What sort of gear ratio did these cars have?

Also what size tires would these run? Any clue on what motor this is?

 

  Thanks

     DVan


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#20 Cheater

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Posted 18 September 2014 - 03:31 PM

Gears are:

Pinion 38 - 60 or 62 - 24 - 34 or 36 rear axle. What would be the final gear ratio for this dragster?


DVan,

When you have an idler gear set-up, regardless of the number of idlers, the gear ratio is determined solely by the first and last gears.

The idlers have no effect on the ultimate ratio - only the first and last gears.

 

Idler gear tatio

If the car has a 38 tooth pinion and a 34 tooth gear on the rear axle, the ratio is 0.895:1.

If the axle gear is 36 tooth, the ratio is 0.947:1.


Gregory Wells

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


#21 Uncle Fred

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Posted 18 September 2014 - 03:32 PM

The idler gear would position the motor further forward allowing you to run with less added weight on the front end. Should be a slightly lighter car as a result.

 

Motor looks like a Ram 850. Some very nice machine work! Did you change the gears? They look new and may be a result of whatever would fit.

Idler gears were usaually 1:1 otherwise.


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#22 Uncle Fred

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Posted 18 September 2014 - 03:50 PM

Taking another look at the pinion, it appears to be a 28 tooth gear. Matched with a 60 tooth would be 2.14 ratio. But the idler gears DO change the final ratio! If the idler gears are 24 and 36 that would be 1.5 ratio = 3.21 which would be about right for a car like this. 

 

The gear ratio is very restricted unless there would be some sort of adjustment built in to the chassis. 

 

Tires seem right.


Fred Correnti

#23 DVan

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Posted 18 September 2014 - 04:07 PM

Greg, thanks for the information and link.

 

Fred, again thank you for your information, it's not my dragster, and like I posted under the picture that it's all epoxied in. "The chassis is epoxied together so taking this dragster apart for further review at this time is impossible."

 

As to adjustment, I couldn't see any whatsoever, Each axle rides with its own bearings and there is no room to adjust anything.

 

Thanks for all your replies. I will pass them to the proud owner of this dragster.

 

We just need tire size now..

 

DVan


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Posted 18 September 2014 - 04:12 PM

But the idler gears DO change the final ratio!


Fred,

I hate to be difficult, but idler gear do not affect the final gear ratio.

Please take a look at the link I provided and Google the issue for further info.

Gregory Wells

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


#25 dc-65x

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Posted 18 September 2014 - 04:21 PM

The gear ratio is very restricted unless there would be some sort of adjustment built in to the chassis. 

 

A change in gearing on a fixed system can be made although in somewhat large increments. The gear spacing, therefore the adjustment, stays the same if you change the pinion and spur by the same amount. For example, going one tooth more on the pinion and one tooth less on the spur.


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#26 Uncle Fred

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Posted 18 September 2014 - 04:23 PM

That's only if the idler gear is the same size. This car has four different size gears.
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Posted 18 September 2014 - 04:31 PM

Fred,

No sir, that is not true.

The gear ratio that exists on the input side of an idler gear is reversed on the output side.

Another way to view is is that when the first gear moves the idler one tooth, it also moves one tooth on the following gear.

From Wikipedia:

"An idler gear does not affect the gear ratio between the input and output shafts. Note that in a sequence of gears chained together, the ratio depends only on the number of teeth on the first and last gear. The intermediate gears, regardless of their size, do not alter the overall gear ratio of the chain. But, of course, the addition of each intermediate gear reverses the direction of rotation of the final gear."


Gregory Wells

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


#28 Uncle Fred

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Posted 18 September 2014 - 05:04 PM

Perhaps it's the definition of an idler gear that's the problem here... This system does not have just one gear but is attached to shaft with a different size gear on it. It is not really a simple "idler gear".


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Posted 18 September 2014 - 05:12 PM

I'm willing to listen, Fred, but so far you're not convincing me...

 

Perhaps you could mock up the gear system you're seeing and actually test my claim?


Gregory Wells

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#30 Uncle Fred

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Posted 18 September 2014 - 05:40 PM

I see that a simple idler gear does not change the ratio, when it is between two gears, but there is a shaft with a different size gear on it attached to the idler gear with a different number of teeth on it.


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Posted 18 September 2014 - 11:00 PM

A gear train with intermediate gears set at 1:1 becomes an idler set-up not effecting the original Drive/Driven ratio.

Varying the tooth count on the intermediate gear set will change the final drive.

 

I think either method works on slot cars.

 

Full Definition of IDLER GEAR

1:  a gear placed between a driving and a driven gear to transfer motion without change of direction or gear ratio  


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Posted 19 September 2014 - 12:47 AM

Fred,

 

The more I think about it, the more I think you are correct.

 

What that dragster has is two "chains" of gearing that are geared together.

 

Bob, 

 

The definition you posted seems inaccurate to me.

 

The direction of rotation of the final driven gear is determined by how many idlers are interposed between the initial driving gear and the final driver gear.

 

If there is an odd number of idler gears, the final driven gear rotates in the same direction as the driving gear.

 

If there is an even number of idler gears, the final driven gear rotates in the opposite direction as the driving gear.


Gregory Wells

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


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Posted 19 September 2014 - 01:36 AM

Fred,

 

Looks more and more like you are correct.

 

See this LINK.


Gregory Wells

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


#34 Uncle Fred

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Posted 19 September 2014 - 07:01 AM

Thank you, Greg.


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#35 George Blaha

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Posted 19 September 2014 - 02:23 PM

Hey ya awl,

 

There are no idler gears in this setup – they are all driven gears – loosen the setscrew on any one of them and you'll have no movement of the vehicle – therefore no idler gear or gears. Assume the outer ratio is 2:1 and the inner ratio is 2:1, then the overall gearing is 4:1. 

 

George Blaha



#36 Uncle Fred

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Posted 19 September 2014 - 02:37 PM

Perhaps it's the definition of an idler gear that's the problem here... 
 


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#37 Uncle Fred

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Posted 19 September 2014 - 02:46 PM

George,

 

I'm sure you recall the Magwinder chassis I gave to you because I deemed it too flimsy. You built it up with a Pittman 85 that worked pretty well.


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Posted 19 September 2014 - 02:49 PM

George,

 

Please see this LINK.


Gregory Wells

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


#39 Gator Bob

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Posted 19 September 2014 - 03:11 PM

What that dragster has is two "chains" of gearing that are geared together.

Bob, 
 
2. The definition you posted seems inaccurate to me.
 
The direction of rotation of the final driven gear is determined by how many idlers are interposed between the initial driving gear and the final driver gear.
 
3a. If there is an odd number of idler gears, the final driven gear rotates in the same direction as the driving gear.
 
3b. If there is an even number of idler gears, the final driven gear rotates in the opposite direction as the driving gear.
 

1. Gear 'chains'... Sprockets ???
 
2. Take that up with - Merriam Webster. :dash2:  :laugh2:
 
3. Result may vary.
Gear Drive_500_2.jpg
Bob Israelite

#40 George Blaha

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Posted 19 September 2014 - 03:12 PM

once a cross is rotating at a reduced speed this now becomes the output speed of the motor and you go thru a second set of gears that are not a 1 to 1 ratio (I assume we are talking about the magwinder) the gear that is driving the final rear end gear is smaller and therefore the speed of the rear gear is reduced again by the ratio of input gear to output gear. the overall ratio will be determined by multiplying the out side gear time the inside gear. I have read the post suggested.  Physics is physics.

 

George Blaha



#41 Uncle Fred

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Posted 19 September 2014 - 03:19 PM

Here we go............. Does the squeaky gear get the oil?


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#42 Gator Bob

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Posted 19 September 2014 - 03:23 PM

Jack Shaft.


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