The originals and the RCR´s have the front clip mounted in a way which allows you to take it off in less then 2 minutes and put it back on without the need of readjusting anything. This is just perfect on the race track. As i would like to be able to do the same for the rear clip, i constructed a original style rear frame, incorporating the same concept ; excentric adjustable bobbins and sliders mounted in the rear clip.
The original RCR set up is a great one, especially the adjustability of it, makes the rear clip aligning very easy. I wanted to keep this advantage and mounted the bobbins on a slotted base plate.
I looked to some of original pics and coppied this style basicly but not to the last detail. My target was also to reuse the original RCR bottom plate plus the heimjointed top struts.
This is what i came up with.
First step: the basic rear frame
made out of 25mmx25mm steel
Step 2: the slottet base plate for the bobbins, the bobbins itself ( just mock ups will be replaced by black PU ones and threaded rivets for mounting the original RCR base plate installed
Step 3: the RCR base plate screwed on
Step 4: rear frame mounted to RCR mounting points on the chassis, utilizing the RCR heimjointed struts.
Step 5: fabrication and mounting of the slider plates. This i made of 10mm aluminium. THis is also a mock up design to check the correcttness of dimensions and function, will be replaced by one with a close to original design. After mounting the rear frame i placed the clip in the final position and measured the dimensions from the slider plate to the mounting plates of the rear clip to get the correct spacer size, which i than made on my lay.
The angle of the slot was choosen in a way that if the clip is closed it faces slightly backwards, so it can not be lifted as long as the latches are closed. In open position they still point downwards the floor so that the clip can not slide of.
Step 6 ; mounting the rear clip: it all went good, the clip adjustment was just fine. The excentric bobbins allowed me to adjust the height correct and the slotted base plate the fore and aft position. Last test was the opening curve. This also went fine. The whole construction is rock solid and allows me to take the rear clip on and off in less than a few minutes without the need for readjusting. I dimensioned the bobbins that the slider plates are centered in the rear clip slot. I like this clean view. The slot in the slider plate will also be locked later on with on of JERGENS KWIK LOCK PINS.
TOM
I'm still considering doing the same with mine..
