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25jrjr
08-01-2017, 06:27 PM
Pretty impressive! So much for the theory that dlms wear out after a few races!

http://www.dirtondirt.com/story_9733.html
Krooser
08-01-2017, 10:12 PM
More than a theory... can't see the article but I'm assuming it's about an XR-1?
MI Dirt Fan
08-01-2017, 10:16 PM
I think it has to do with Rocket tweeting prior to last weekend at PDC the current house car being used has 43 wins (44-45 now) in 100 or so entered events.
MasterSbilt_Racer
08-02-2017, 05:51 AM
Pretty impressive! So much for the theory that dlms wear out after a few races!

http://www.dirtondirt.com/story_9733.html
One car doesn't speak for all of them. I have seen them break badly after 10. Lol
fastford
08-02-2017, 08:48 AM
a new chassis that breaks after 10 races that has not been in a serious wreck has some serious construction issues, maybe it was built on Monday...LOL
ptown
08-02-2017, 09:21 AM
106 starts and 43 wins is pretty impressive but only Richards knows if the tubing on that car is the same as a production car. After last night make that 107 starts and 44 wins.
Bubstr
08-02-2017, 10:27 AM
106 starts and 43 wins is pretty impressive but only Richards knows if the tubing on that car is the same as a production car. After last night make that 107 starts and 44 wins.

It would be pretty foolish to switch metal for the chassis that was sold. A couple minutes and a punch test would get you caught right a way. I would believe they sold you what they said.
b1eagle
08-02-2017, 01:46 PM
Is that the car Rumley designed?
25jrjr
08-02-2017, 03:19 PM
In the article, Mark states that Rocket cars are built with the best metal money can buy!

Any theories here?
#FALSuperman
08-02-2017, 08:48 PM
It's actually 45 in 108 now...PDC was #44
MasterSbilt_Racer
08-03-2017, 06:39 AM
In the article, Mark states that Rocket cars are built with the best metal money can buy!

Any theories here?

I am pretty sure he means docol. Any steel will last a long time if the car isn't built to be a spring.
Bubstr
08-03-2017, 01:35 PM
In the article, Mark states that Rocket cars are built with the best metal money can buy!

Any theories here?

The steel contains some amounts of Carbon, Molibneum and nickle. The number on the steel tells what amounts they are, such as 1000 is mild steel and anything starting with a 4 is a chrome moly. Ducol is a name brand for this German steel, not a identifying number. It almost has to have a identifying number for any Engineer to even think about using it. It gives you tested results for that steel. That is why you can verify with a punch test.
GRT62
08-03-2017, 02:47 PM
Is that the car Rumley designed? you got it.
Krooser
08-03-2017, 03:03 PM
SSAB is a Swedish company... Docol is good stuff but pricey.

MBRacer is correct... flexi-flyers don't last (apologies to George Smolen). If they did Model A Fords would still dominate racing...

https://www.ssab.com/globaldata/news-center/2016/12/05/12/08/racing-ahead-with-docol-r8-tube
MasterSbilt_Racer
08-03-2017, 04:14 PM
The steel contains some amounts of Carbon, Molibneum and nickle. The number on the steel tells what amounts they are, such as 1000 is mild steel and anything starting with a 4 is a chrome moly. Ducol is a name brand for this German steel, not a identifying number. It almost has to have a identifying number for any Engineer to even think about using it. It gives you tested results for that steel. That is why you can verify with a punch test.

Correct. I think there are only 2 or 3 recipes for Docol tubing. So that doesn't completely narrow it down. But for a properly designed race chassis, it isn't super critical. A properly designed car is designed for stiffness. Adequate stiffness compared to suspension stiffness, where a consequence of this, fatigue is of little concern. Unfortunately, many DLM chassis are not designed this way.