Twin pull cable steering on bikes

[Jon]

Hi

I'm pretty keen to run twin pull cable steering on my bike
I may never get to Bonneville but the Australian rules are based on SCTA rules.

The current rulebook does not allow cable and I can understand why a single cable is not allowed.
Twin pull cables can be safe and are the bassis for contol of most non commercial sized planes.
I got this pic of a bike from Speedweek this year;


I DO NOT want to cause any hassles for the owner of this bike and have tried to find his contact details without success.

Can anyone confirm if twin pull cable steering is now allowed for streamliner bikes under SCTA rules please.
Bumpsteer on a bike will make it pretty dangerous IMHO, this had been confirmed by the people who have been there.

Cheers
jon

[Nortonist 592]

E-mail Matt Schuss or Tom Evans at the SCTA and get a definitive answer.

[Dean Los Angeles]

Are you sure it is cable? There are no bends in the picture. Could be tie rods to other linkage.

[Glen]

Rule book says  direct, gear or link type only 7.H.14, pg 125.

[Jonny Hotnuts]

I'd bet there is a solid shaft in those......

~JH

[Jon]

Thanks guys.

I will track down Matt's and Tom's email address and get in contact.


I'll take the wager on them being cables.

Cheers
jon

[PatMc]

I'd bet there is a solid shaft in those......

~JH

Yeah, they appear to adjustable via heim joints, not something you'd do with cable.  It would just make more work for you.

[kiwi belly tank]

If thats a solid link in there you'd be asking for trouble with horizontal flex between the heim & the casing mount.
Control cables come with threaded ends, you screw on what ever you want.
It will be interesting to see the out come of this question.
  Sid.

[Jon]

I contacted Matt and received this reply;

"We do allow a pull-pull cable steering system. There needs to be some pre-load to make sure there is no slack in the system.
We have a rule change request to fix the rulebook."


Thanks people for their assistance.
jon

P.S. Woody made contact witht he owner of the above bike, they are cables.

[kiwi belly tank]

Well there ya go!
It's amazing how loose our rule book can be on occasions.
  Sid.

[bak189]

Yes, amazing how the rules change.....10 years ago I asked if I could build our LSR sidecar using cable steering......SCTA/BNI answer:  "no-way cable steering is not safe and I don't see SCTA/BNI ever approving that type of steering"..........New officials....New rules......These New Officials must have taken a look at Denis Mannings record M/C liner.....it has used cable steering for many years with great safety and great success........How times change!!!!

[bak189]

Not having raced with SCTA/BNI since 2002......my question is WHO is Matt Schuss....is he one of the NEW officials.......I certainly know Tom Evans...we go way back......and I also know  Van Butler......I do love New clear thinking OFFICIALS..........................

[Nortonist 592]

Bak.  Matt is Tom's replacement as tech head.  Very knowledgeable and affable.  The non BS variety of inspector.

[Dean Los Angeles]

So go ahead and run anything illegal and we will change the rulebook later.

Really stupid. There is a process to change the rulebook.

[WOODY@DDLLC]

The guy who built the bike did a very good engineering study on how and why it would work. He did not just build it and show up! It was a vast improvement on what he had been allowed to run according to the rule book! The problem with many issues that long to be tried is how to properly evaluate it and make it "legal" based on the prior art and experience. All safety rules come from real events and the attempts of the governing body to make sure it "never" happens again. [And CYA!! ]

IMO I don't think he received any special treatment! He presented his reasonable case to reasonable people! Does that happen every time - probably not!

Good judgement comes from experience and experience comes from bad judgement!

It's a process - keep at it!!