[quote=“PaddyB”][quote=“Ducked”]Well you could use the evil power of Google to find out. Bit busy at the moment.
Anyway, I droned on about it extensively in an old thread and was pointedly ignored. Not putting myself through THAT again.
'Mericans call them “cutting brakes” or summat like that. Though they usually mis-spell the brakes bit.[/quote]
I did use the evil power of google and it yielded nothing useful. Or perhaps my abilities in the Queen’s English are insufficient for this particulary query.
I’m sure you’re going to go google it now and find exactly what you are talking about hahaha. Or you can just explain the idea in a nutshell. I won’t ignore you (at least not pointedly). [/quote]
Ok, well, in a coconutshell, the “handbrake trick” is intended to get you out of a situation where one driven wheel looses grip and spins. The differential sends all the drive to the spinning wheel, so the other driven wheel (which might still have grip) gets no drive and you stay put.
Applying the handbrake lightly feeds some torque through to the wheel with grip and you move, though you move against the resistance of the applied handbrake. (Very) poor man’s limited slip differential.
Twiddle brakes split the handrake system into two halves, so you can apply the handbrake independantly to the slipping wheel only. Since the handbrake system has two cables which converge in a yoke near the handbrake, its relatively simple to separate the two and connect them to separate levers, and theres hardly any extra hardware involved, though the cable routing might require extra or larger holes in the floor.
Although they are sometimes fitted to 4WD vehicles the main application I’m aware of is in the Trials motor-sport, which AFAIK is restricted to the UK. This involves (or involved, I’m not sure what the current status is) driving up muddy hills against time, in 2-seater, 2WD open “sports cars” vaguely reminiscent of the Lotus 7, though I think some classes were specially built, with centre-pivot front axles of extreme articulation.
Events were televised in the UK on Saturday mornings in the 60’s, when I was a regular viewer.
Co-drivers were usually women, and it apparently helped the tyres grip if they were big, and bounced up and down a lot. Large women bouncing up and down in sports cars in the mud probably made a big impression on me as a young lad, which may be the real reason I think twiddle brakes are great, though they are.
But tell that to kids today, and they’ll not believe you.
Anyway I’m droning on gain, just ignore me pointedly.
Already discussed ad nauseam http://www.forumosa.com/taiwan/viewtopic.php?f=75&t=80885&hilit=fiddle+brakes
(though the link to the DIY fitment to a Vitara is unfortunately but predictably dead.)