[Intergrali]

I believe ortmann tyres are made of a resin/rubber mix.
Resin is harmful if inhaled and so should these tyre not be excluded from racing due to health hazard?

Also what do people think about paying £2.75 for a pair of tyres, is it not getting somewhat expensive considering the cost of Slot.it P2's are under £2 for a pair?

 

[GRAH1]

welcom back rob and congrats on the test
re the ortmans Ive still got my original pair that I bought specificaly to use on your track where as the p2s I use on other tracks only last a couple of events due to the treatments required to make them work , sure the dust of ortman tyres is a worry until we get a definate statement re saftey from the manufacturer ,maybe one of our german members can clear this up once and for all,
The main problem I see is thatin competitions suchas the audi and porsche challenges when you run in the heat following some one who has just run on the same lane using ortman or silicon tyres is that there is a cleaning effect and the rubber that has been laid down by p2/3s etc gets removed and grip suffers I had this happen at pendle my run on red lane was wasted due to this happening , Don Stanley also suffered may be others too I think for next season we specify rubber silicon or ortman at each round and stick to it

 

[Intergrali]

I'd be happy with that Graham.
I didnt have a problem because I had so much power I didnt know how much wheelspin I had, oops. I think the problem is ortmanns.

 

[GRAH1]

I'll put that forward as a proposal at the committe meeting after the wolverhampton .

 

[Intergrali]

I'm with you on that one

 

[R Livingston]

There was a discussion of Ortmann material on Slot Car Illustrated.
They are polyurethane, or you could call it urethane. One of the guys (RichD) did some chemical analysis, ruled out silicone.

The dust from these should not be harmful.

One of the points raised by Philipe de Lespinay was that he believes there are NO rubber tires as original equipment on slot cars today, all are some form of plastic

 

[Intergrali]

I will agree with Phillippe that there are no pure rubber tyres these days.

 

[GRAH1]

True Robert there are no real rubber tyres but the real problem is the cleaning effect I described earlier the difference it made to me was immense my times increased by 1/2 a second wich really puts you out of the running on a track like pendle , luckily the rest of my runs were fast enough to ensure me a place in the final although it left me with no lane choice but I was happy with black anyway so it was not that bad in the end

 

[Intergrali]

Yes, agreed but hadnt noticed with the stupid power I had

But yes the same happens at our place and it pisses me off

but no one is willing to drop the ortmanns so kind of ducked in that respect.

 

[GRAH1]

Did you try the spongies I gave you?

 

[Intergrali]

Been busy lately so only been going to the club for racing then left asap for this reason and that. Will try them on monday though.

 

[GRAH1]

clean them with sun tan lotion ,you can also try a bit of castor oil on them thata all we used for the proxy and every car had loads of grip ,Might not work on your ortman encrusted track though

 

[Intergrali]

ortmann encrusted sounds about right, have a huge temptation to get the spirits out on monday

 

[Revvvs]

Can anyone help in pointing me in the right direction to get these tyres in the UK?

I've sent a couple of e-mails to rsslotracing last week but had no reply.... anyone got a contact phone number or an alternative source?

thanks in advance,
Paul

 

[thomas]

Orthmann and Wiesel tires are out of Polyurethane - a well known fact. And both "manufacturers" don't earn a lot of money with these products - but both are fanatic slotracers - and Stefan Wiesel also produces excellent 1/24 kits and Michael Orthmann offers suitable wheels for his tires.
Available in most of the german e-shops.

 

[Intergrali]

Buying Ortmanns in the UK is a pain in the proverbial backside.

You better off buying them overseas

 

[Robert Davies]

QUOTE (GRAH1 @ 3 Oct 2004, 00:09)......the real problem is the cleaning effect I described earlier the difference it made to me was immense my times increased by 1/2 a second wich really puts you out of the running on a track like pendle , luckily the rest of my runs were fast enough to ensure me a place in the final although it left me with no lane choice but I was happy with black anyway so it was not that bad in the end
<{POST_SNAPBACK}>

Re: the cleaning effect of ortmann tyres.

I did alittle work on this alleged phenomenon before the last Porsche challenge round @ Pendle.
Not desperately scientific but interesting nonetheless

.

The circuit consists of 70' of cleaned Carrera track with straights of 8', 16' and 12' and two tight infield sections.

First I ran my treated p2 tyred car for one hour, keeping note of laptimes. For the first 45 minutes the laptimes were good, then poor. In the final 15 minutes of the run the track appeared to 'come to' the car and the laptimes dropped by over a second and a half (Low 8s to mid to low 6s).

Next I ran my Ortmann shod car for an hour - laptimes varied between 6.2 and 6.4....

Finally I ran the p2 shod car again - its' laptimes remained in the low 6 second bracket for the following hour - which to my mind appears to refute the 'cleaning' or deleterious effect of ortmann tyres to a rubber shod car.

...and then I went looking for a plaster for the blister on my thumb

Anyway... back to the Pendle Porsche round... All went well till I got the red lane... Not much grip at all

It was like someone had splashed lighter fluid on random bends! Perhaps there's a tyre/prep system that buggers the grip for both ortmanns and conventionally prepped rubber tyres?

-Rob

 

[GRAH1]

Rob have you managed to find grip at wrexham with other tyres than ortmans yet?

 

[Robert Davies]

QUOTE (GRAH1 @ 4 Oct 2004, 23:26)Rob have you managed to find grip at wrexham with other tyres than ortmans yet?
<{POST_SNAPBACK}>

I'd just come back from the club when I wrote the previous post. I did some extensive running (after everyone had cleared off home) with both a ProSlot Porsche GT2 with all Slot.it running gear, and p2 tyres, and a Slot.it Audi R8 with p2s.

So in answer to your query, IMHO...

p2s with the usual prep... and clean the track of the dust that emanates from downstairs

Ortmanns still seem better on longer runs though. On Carrera, with the track 'rubbered in' there's nowt to choose really between Ortmanns and p2s. Obviously, because of the differing nature of the way the two types of tyres give up their grip, there are subtle differences in car setup required to extract the best from them both.

It appears to be a dust related issue - rubber tyres do not run well in a dusty environment - Ortmanns are nowhere near as badly affected.

-Rob

 

[TSRF]

But the real question remains:

QUOTE should these tyre not be excluded from racing due to health hazard?

Intergrali, it all depends on how many you inhale each day, and on their size. Let say if you inhale more of the Ortmann 1/24 scale tires for the Carrera Avus cars, will you die sooner than if you have a regular diet of FLY "Classic"s? I guess only a neuro-chemical surgeon will be able to tell you.

Also I believe that rear axles should be banned because they may hurt your eyes when you stab yourself with said axles, especially if there is a gear on them as them' little teeth are lethal on retinas.