Why asymetric steering bellcranks?

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Lonestar
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Why asymetric steering bellcranks?

Post by Lonestar » Tue Apr 17, 2018 12:55 pm

Howdy yall

I've had this one on top of my head a few times but never got to ask... but as I'm working on getting the LXT ready for action in May, it comes back to the surface again:

why the steering bellcrank asymetry on the first-gen losi steering bellcrank design? What is the obvious bit I'm missing here? Why the off-center hole and the longer left bellcrank?

(pic courtesy of ebay :mrgreen: )

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Thanks

Paul
Last edited by Lonestar on Tue Apr 17, 2018 1:37 pm, edited 1 time in total.
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jwscab
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Re: Why asymetric steering bellcranks?

Post by jwscab » Tue Apr 17, 2018 1:09 pm

that's always bugged me. the only thing that comes to mind is it's for ackermann geometry.

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Lonestar
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Re: Why asymetric steering bellcranks?

Post by Lonestar » Tue Apr 17, 2018 1:36 pm

mmh... that certainly influences ackermann angles, but in an asymetric way... :shock:
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Re: Why asymetric steering bellcranks?

Post by GoMachV » Tue Apr 17, 2018 2:07 pm

Common core math :lol:
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threesheds
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Re: Why asymetric steering bellcranks?

Post by threesheds » Tue Apr 17, 2018 3:18 pm

Anything to do with asymetry of servo?

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badnat
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Re: Why asymetric steering bellcranks?

Post by badnat » Tue Apr 17, 2018 6:14 pm

Ok i thought it was quite obvious for everyone here fellowers ... and that i was dumb :shock: so i never asked :roll:
Happy to see your confession on that subject’... i feel better now (big breath) :mrgreen:

Btw if anyone can help, i would really appreciate ...

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RC10th
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Re: Why asymetric steering bellcranks?

Post by RC10th » Tue Apr 17, 2018 10:04 pm

Possibly for roundy round racing ? Or someone made a mistake and set the machine up wrong ?
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Re: Why asymetric steering bellcranks?

Post by GoMachV » Tue Apr 17, 2018 10:09 pm

My thoughts were that they optimized it for a centered servo, which moved the crank over a bit, and putting the cranks too close would not be optimum. By offsetting both the sweep is somehow corrected with the geometry of the longer input side. I have NO idea if this is why, not any proof, but it was always my feeling
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Re: Why asymetric steering bellcranks?

Post by TRX-1-3 » Thu Apr 19, 2018 1:06 pm

My RIGHT bellcrank is longer. :roll: ha ha

When I got my JRX2 I also noticed this. I looked around at aftermarket / period "hop up" steering kits and they did not seem to be asymmetrical, further intriguing me. Maybe it's one of those Losi "one eye covered" inside jokes?
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Re: Why asymetric steering bellcranks?

Post by Lonestar » Thu Apr 19, 2018 2:31 pm

So no-one knows for sure... I love it :mrgreen: I like Jeff's tentative explanation tho :!:

@mytimac can you please ask Gil next time you see him? :D
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Re: Why asymetric steering bellcranks?

Post by mytimac » Fri Apr 27, 2018 2:12 am

Yeah, let me get the plane and ask him. :P
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Re: Why asymetric steering bellcranks?

Post by ThunderDan » Fri Jun 08, 2018 1:18 am

I think it was because of the original servo saver bendy arm setup. It may have been a work around to extend the the bendy arm and move the hole forward in the rack as they may have found the equal length drag link / driven bendy link resulted in too easily broken bendy links. Butt I’m only spitballing here. I think this flawed design results in the car having a tighter left turning radius. Goofy as hell. :D

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Re: Why asymetric steering bellcranks?

Post by RCveteran » Tue Jun 12, 2018 10:53 pm

I think Gil was drunk when he sketched it out and no one noticed. Good a theory as any. :D :D

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