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> Speed Record for Slot Cars, Is there a world record for straight line speed of a slot car?
Chris Frost
post 4 Sep 2007, 11:54
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Is there a "World Land Speed Record" for slot cars?

I've been contacted by a group of people keen to make a record attempt - and they are keen to know what the current record is - if there is one!

I know the record for a lap of a 155ft King Track went over 70mph a few years back. Obviously slot cars are capable of going faster than this in a straight line. With a bit of development on gear ratios and aerodynamics they could probably go quite a lot faster in a straight line.
So has anybody actually measured the speed accurately?
If so please lets have the details.

Chris Frost

P.S. I know there was a thread on this topic last year, but it didn't tell us what the current record is.
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zendragon
post 4 Sep 2007, 12:44
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Chris
There is/was a speed record for a scale mile, which was run a while ago for James May of Top gear fame.
they were using scalextric cars ONLY, and some crappy timing system. This was for a flying mile, and the scale speeds worked out at something over 650 mph.
If you are going to attempt this again, please keep me in the loop, I would love to do this again using proper timing and cars.
Would you want to run standing start or flying mile, and what would the power supply be, all relevant questions, before you go ahead.
Feel free to PM me for any other help I can give


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TSRF
post 4 Sep 2007, 12:50
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Hello Chris,
155' (or 47.25 meters) in 1.404" is the current record on the 8-turn King track. Of course it makes the Scalextric speeds set on the Top Gear show a bit tame.

The ONLY absolute speed record I am aware of set as such (besides the Scalextric/Top Gear attempt) is the one set by Champion with three 707-powered cars in 1966 for 80 hours where they covered 1200 miles on an oval track set in a parking lot.
You can see the report HERE.

In 1971, Miniature Auto Racing tried to set a competition for a speed record for slot cars in the 3 scales, but it came to nothing.

There are some HO 24-hour records, but I don't think anyone as yet really tried for a straight-line record. I have little doubt that a wing-car devoid of much of its rear shovel running on 36 volts could top 200MPH, for about a second or two before the motor would go poof.


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dgersh
post 4 Sep 2007, 13:42
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Seems the speed record would be in 1/24 slot drag racing, where I think the record is something like 4/10 of a second for the scale quarter mile - 55 ft. If my rough calculations are right, that's about 94 mph.

In scale speed, probably an HO dragster would hold the record, since you get to multiply the actual speed by 64 or 87, and these things are wickedly fast.

The Scalextric thing was more a publicity stunt than a real speed record, although it sounds like it was fun and achieved its purpose.

Don
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john's slotr...
post 4 Sep 2007, 13:54
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QUOTE (zendragon @ 4 Sep 2007, 13:44) *
There is/was a speed record for a scale mile, which was run a while ago for James May of Top gear fame.
they were using scalextric cars ONLY, and some crappy timing system. This was for a flying mile, and the scale speeds worked out at something over 650 mph.

Hi - the other postings on this thread are in actual speed
Not sure what the 650mph scale speed means
Is it anything like 650 divided by 32 to give a real speed of only about 20mph?
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superhornets
post 4 Sep 2007, 14:20
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Hi Chris
You know we did a thread on this a year or two back and we believed that it had never been done
I think you can count out the top gear /scalextric event as it was acomplete farce with less than 1 amp power and timing equipment that only worked when pete doherty wasn,t taking drugs
I believe Haynes museum are going to reprise this event next year again with the help of scalextric but knowing how Haynes museum operates I wouldn,t bet on it happening
When I talked to you last year I had formulated in my head how it could be done ,and in fact when steve francis and myself were down at the brooklands 24 hour I did offer it to them and he asked me to put together a package and present it to them ,which as I am too involved in my book at the moment I havn;t done
I would think we would need about 1500 pounds to set it up but once it was done it could be run as an annual event for little extra cost a bit like bonneville speed week
I must admit I am not interested in scale speed as that is pants for this competition
I,ll tell you why
A nine foot chassied 1/32 car (Mustang /Camaro ) doing real 10mph would effectively be doiing 320mph scale
The same chassis would fit under a 1/24 mini /imp and give or take a few vagaries would do the same 10 mph real speed but that would be only 240 mph scale
Right having established that any self respecting record attenmpt would need to be substantially quicker than a king track average (70mph real ) or the terminal speed achieved by 1.24 dragsters (125 real mph ) we need to supply lots of power and lots of straight and provide safety for people watching as I suspect the speeds could be in excess of 150 mph and the cars may become aerodynamically unstable at this speed. censored.gif
Any way if you trawl back to the previous thread you will see similar comments
I would be interested to know who your contact is Chris and do they have the spondooliks cos if they do I suspect Brooklands may well take it on thumbsup.gif
I think as it never appears to have been done before it could be sensational dribble.gif

Cheers tony


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zendragon
post 4 Sep 2007, 14:28
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20.8 MPH TO BE PRECISE.
As I say it was a publicity stunt for scalextric, and we had to use hornby parts they were scrutineered, not quite sure about the engine and gears in the winning car though. I am absoluteley convinced that the record would be broken by other makes, but it would depend on the regs, and that is were the problems would start, what would you be allowed to use, there are so many variables with different motors, gears bearings, and bodies, without the question of power supplies, where would you draw the line?.
I would still be interested in being involved with this enterprise, I might even be persuaded to offer some ideas for rules and regs.

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with all due respect to the other classes of racing
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superhornets
post 4 Sep 2007, 14:38
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Tony Condon
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Hi guys
all the stuff we talked about a year ago is still on this forum Page 5
Enjoy lmfao.gif

Cheers tony


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Dick Smith
post 4 Sep 2007, 15:24
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Tony and I have talked about this quite a few times during the past year, so I have few thoughts.

There are many 1:1 scale FIA ratified LSR's for different capacities, distances, wheel driven or jet powered "land vehicles", but the outright record is held by Thrust SSC a jet car, averaged over a two way run. I THINK that some of the ratified records are for one way runs. The distances are usualy 1 kilometer or 1 mile. I am not sure which distance the current outright record is over. There are also different records for flying and standing starts.

For practical purposes I would suggest that a slot car attempt is limited to:
1) Wheel driven 32nd scale cars, not jets!
2) Standing start scale 1 kilometer, a track 31.25 meters long plus a bit for deceleration, which could be aided by some short sections of reverse polarity and whatever system slot drag racing uses these days for catching the cars. If there was enough funding a longer track for flying starts could be built, something around 60 metres long. Only one lane is needed.
3) Three classes
a) Out of the box slot cars
b)Scratch built accurate (+/- 16th inch on all dimensions) 32nd models of record cars (Bonnevile Speed Week included)
c) Anything goes within a maximum width, length and height "box" as long as its wheel driven.

Could be fun.


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dgersh
post 4 Sep 2007, 15:28
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Those sound like very good guidelines Dick - but as long as we're fantasizing, why not a scale mile?

Also, I would have tended to go for 1/24, as the traditional slot drag class, which would definitely work better in the USA, but 1/32 would probably appeal more in Europe.

Don
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lmcollector
post 4 Sep 2007, 16:25
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Just curious about a point made in a previous post on this topic: does aerodynamic drag really have an effect on cars this small?
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Fergy
post 4 Sep 2007, 16:41
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QUOTE
does aerodynamic drag really have an effect on cars this small?


Yes! Just look at the 1/24 "wing cars" to see how aerodynamics have led to their design.

A simple test. Drive down the road at 40 or 50 MPH. Put your hand (a relatively small object) out the window and point it up or down in the air flow. You will feel a considerable aero effect. It may be less on a slot car but it will still be very noticeable.

Given that US HO drag cars topped the 100 MPH (real) barrier a few years back, I think aerodynamics is not something to be overlooked.


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dgersh
post 4 Sep 2007, 16:49
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I personally feel critical mass is gathering this time! Do you guys realize that about once every 7 years since 1964 or so, this subject has come up, been discussed very seriously and then faded into oblivion once everybody realized the actual problems and investment needed?

And on the forums, the subject also comes up regularly about every 6 months - so as the intervals get shorter, maybe we're getting closer to a real resolution.... the Brooklands connection sounds feasible - and maybe Rolls-Royce and BAE would like to contribute a steel/aluminum/composite track and some space-age electrics....

Don
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Fergy
post 4 Sep 2007, 17:04
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Odd you say it comes up every 7 years, Don! It was about 7 years ago that the subject was given serious visitation by the HO guys in North America. Because it was HO, they wanted to emulate Bonneville with a scale mile warm-up, scale mile timed section, and then a lengthy cool down section. It was forecast, based on the 100 MPH speeds reached in the scale (1/64) 1/4 mile, that speeds would likely reach 150-175 + MPH!

I have no doubt that 1/32 or 1/24 cars can reach or exceed the same level.

One of the key factors that prevented it from happening was the ability of someone to construct track modules that could be aligned and levelled with the sort of precision needed for cars travelling at such extreme speeds. Can you imagine a 1/24 car becoming airborne and leaving the track at 175 MPH? blink.gif


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Tropi
post 4 Sep 2007, 18:30
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The usual reason for fizzling and fading into oblivion is persistent upping of the ante until it spirals into cloud cuckoo land, then crashes and burns ignominiously without a wheel ever turning. Actual events rarely take place.

Regardless of any mocking criticism, the Scalextric effort actually DID take place, which is a tremendous tribute to Scalextric/Top Gear, and most particularly to Adrian Norman.

The absolute essence of making an event actually take place is to set the parameters at an affordable and easily achievable level. One can always make improvements based on that first base line. But if there IS no first base line, then nothing will happen, other than a lot of hot air, as usual! biggrin.gif

In my opinion, the Scalextric/Top Gear event event got a lot of basic things right , with flaky timing being the most obvious problem.
Better timing arrangements would not be difficult to arrange.

I believe it is highly desirable to use readily available plastic track and forget about purpose built precision track modules. Far better to have an event actually happen, albeit with less than perfect track, than not to have it happen at all because such a track is not available, or at least not at a price anyone can afford. To this end, sorry to say, but Sport track, with its less than ideal connections, is not the best. But there are others more suited to this purpose.

Another personal recommendation is to absolutely LIMIT the available power to a low level, but ensure that whatever the level chosen, it is consistent and close to bullet-proof reliable. A readily available, cheap and reproducible power STANDARD is essential. That would enable many more people to experiment themselves and then join in competition. Without popular support, such an event simply doesn't happen. In my opinion, the voltage should never exceed the 12-13 volt standard and amperage should be set at a low figure to start with. If sensibly low limits are not set, then the pie skyers (or should that be sky pie-ers) will be looking for a thousand amps and 240 volts in the rails.

I would also suggest that, if a future attempt were to be contemplated seriously in UK, it should definitely be based around the most popular scale of 1/32 and all others be completely forgotten about.

Enough - MAKE IT SIMPLE, MAKE IT ACHIEVABLE, MAKE IT APPEAL TO LARGE NUMBERS AND MAKE IT HAPPEN. smile.gif
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