Hi, I'm trying to find out about a double cranked pitman arm I briefly saw on the web it was on a model A sedan, could be a couple of years ago maybe longer. I had downloaded photo of it but the files from that period have got corrupted so I don't have any images of it any more. Can anyone point me in the right direction please. Thanks, Nige
something like this ? https://www.ebay.com/itm/1928-1929-...666370?hash=item2d178d5402:g:nL4AAOSwyfpfY9pg
No it was a pitman arm that cranked a lower pitman arm on a cowl steering set up, supposed to eliminate bump steer. I think the rod was entered in AMBHR but I'm not 100% sure.
this is the only image I could find but I can't blow it up large enough to see the detail, it goes all pixilated when I try
Looks like a conventional box with short pitman linked to a bellcrank short arm with bellcrank long arm in position to work with typical drag link. Very interesting, looks like if done right it could be a good solution, but must say it looks a bit busy. Maybe if the upper arm and link were inside it wouldn't look so clunky.
I believe it was pretty common on old sprint cars or modifieds. I ran it my old cowl steered T coupe and it was slick. I'll see if I have pictures. It was a frame mounted idler arm that had a drag link from the cowl mounted pitman arm, and another from the idler to the steering hoop on the spindle. Similar to the A sedan pictured, but both drag links were "horizontal". Found some pics.
I think it could be cleaned up quite a bit like the early sprint car pics that have been posted here recently
Not smart engineering,don't copy dumb things,an even more, never copy a dumb repair to dumb crap to start with. Stop,bad poor planning,fix it right at the start,if a steering box dose not fit were it needs to,you need fix that mistake,not try to cover one mistake,with another one. Cowl steering 99% of the time is done badly an has bump steer{from very bad bump or not so bad} It never looked cool too any one that understands engineering< It looks like a sign on the side of car that reads"I'm a copy cat fool" Know also ,every time you add a joint too steering,you add play*<even less control>plus you add another fail point. Take the time to find out that cowl steering crap. The one % done right,with out bump,still looks like ugly crap sticking out of chopped up cowl. Don't be ear to ear box of rocks. Sprint cars steer with the gas pedal,an put up with crap steering in many cases. You can find a good number of notes on HAMB,about how to do steering right. I raced n built close to every type of race car under the sun,won with them ,in my 40 years of that fun n games as well.
You beat me to it Dana, and I prefer it from your mouth as you are the master and I but a student. May all pay heed.
No more moving parts or radical departure from design of many factory steering setups, just arranged and located differently. Many old cars used a bellcrank araingment, just not so visible.
That’s for stability and standard for a long link in the later champ race cars. That car only turned left.
Racers like Don Brown and Greg Weld didn't do "dumb" things or "gimmicky" things. It was used to cut down on bumpsteer.