WHAT KYOSHO ULTIMA CHASSIS IS THIS

[Jerzi]

I got theese pics long time ago from a guy who lived in Japan( not 100% sure) and he send me pics of an ultima that he told me was done an very small amount for an big rc-event.
Can somebody tell me the brand and the history of this chassis because it look very neat.

http://jerryn.kuvat.fi/kuvat/RC.AUTO%2520KUVAT/KYOSHO%2520ULTIMA%2520TRAILARMS%2520/

Jerzi

[Mr. ED]

I think I've seen this once before on the forum. Unfortunately I forgot the name of the member who owned it or built a copy, sorry

[Jirka]

I have seen an advertisement from that in RCCA in late 80's and/or early 90's. It must have been an full page ad because I didn't find it anymore from those scans: http://www.rc10talk.com/viewtopic.php?f=7&t=13306 . Could someone with those mags help?

Technically those are not trailing arms because inner hinge pins (and in this case also outer hinge pins) are longitudinal and there are also traditional upper arms and rear hubs. Position of inner hinge pin is interesting and I would like to see or hear how they work and what advantages or disadvantages there is.

Jirka

[RC10Eh]

Cool car and concept . I think a member here had been working on a triumph with the same trailing arms. Cant for the life of me remember the thread , but he also had a great indoor track in his back yard . Would love more info on this ultima !

[Mr. ED]

we're talking about the same member

And Jirka is right about the 'trailing' . My guts say the forwarded hinge locations got to have some effect on how the car behaves under acceleration or when braking, but I'm not sure to be honest.

[Jirka]

I think that the forwarded hinge pin locations creates higher forces to hinge pin and to suspension arm hole around hinge pin and because of this the suspension got "stuck" when it moves and it does not work as freely as normal A-arm suspension would work. If my theory is true it does affect acceleration and breaking a little like swaybar but installed front to back not like left to right like normally/allways installed. Also normal suspension in bumps and especially in jumps does not work so freely. I might also be totally wrong.

Jirka