WPVT Posted June 11, 2022 Share Posted June 11, 2022 I just noticed in the specifications for my 1929 White truck that the RH turning radius is considerably smaller than the LH turning radius. I wasn't aware of this aspect of auto engineering. It now makes sense to me when I consider most of the turns a truck is required to make on roads in right hand driving countries . Is this true of all RH drive vehicles then and now ? Link to comment Share on other sites More sharing options...
Gunsmoke Posted June 12, 2022 Share Posted June 12, 2022 hmmm... curious to hear some answers. Most 30's era steering boxes for cars are set up so that worm gear in box is dead center with sector gear in straight ahead position, and there are equal rotations of steering wheel in both directions lock to lock. So I would assume turning radius would be same for left or right. But, what do I know! Trucks may be different setup. 1 Link to comment Share on other sites More sharing options...
TTR Posted June 12, 2022 Share Posted June 12, 2022 (edited) While I've ran into this peculiarity on more than one (LH drive) pre-war car and after confirming everything else being aligned, correct and/or undamaged, I've never researched/studied its root cause. Can't recall if all were same, as in RH turn smaller than LH, or other way around. Never seen it in post-war cars. 🤔 Edited June 12, 2022 by TTR (see edit history) Link to comment Share on other sites More sharing options...
Mike "Hubbie" Stearns Posted June 12, 2022 Share Posted June 12, 2022 My truck definitely turn right smaller than left. On mine it’s because of the drag link location. When turning to the left the tire hits the drag link. Mike Link to comment Share on other sites More sharing options...
Gunsmoke Posted June 13, 2022 Share Posted June 13, 2022 Mike said "When turning to the left the tire hits the drag link". Most late 20's/30's era steering linkages I've seen had a stop on the axle on both sides (referred to as lock to lock) which the steering arm on both sides came up against when at full turn, (and before steering box was at it's limit) preventing the wheel from striking the drag link (which would not be good). Many drag links had a specific built in curvature to prevent wheel contact. So I'm not sure Mike what you may have encountered, perhaps over-sized tires/wheels, or incorrect drag link. In designing these very simple systems i cannot imagine why any company would allow wheel/drag link interference. Link to comment Share on other sites More sharing options...
Mike "Hubbie" Stearns Posted June 13, 2022 Share Posted June 13, 2022 Gunsmoke, you are correct. Next size up tires and worn out drag link. Mike 1 Link to comment Share on other sites More sharing options...
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