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Learning how to build Lotus Seven replicas...together!
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 Post subject: Re: R.M. Classics Eight
PostPosted: November 5, 2018, 11:07 pm 
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Joined: November 4, 2016, 10:00 pm
Posts: 13
Location: Winnipeg
I guess I should pick up where I left off. I was having some issues with the lower A arm, the geometry was wrong and as was pointed out it was under-engineered. I cut it apart, corrected the angle and added a gusset. See before and after.


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 Post subject: Re: R.M. Classics Eight
PostPosted: November 6, 2018, 12:00 am 
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Joined: November 4, 2016, 10:00 pm
Posts: 13
Location: Winnipeg
Brakes front and rear are standard Mustang II stuff. I considered upgrading the rears from drum to disk but decided against it. It was a good decision, the brakes are more than adequate. Pedal box is an OBP universal kit car unit which fit the bill nicely. It came with the right cylinders and nice reservoirs. I did have to trim everything down due to the tiny foot well. Other than the wider track this car appears to be the same dimensions as an original Series 3 which means there's no room to spare anywhere. Brake lines are the copper nickel variety, I'm using a pressure style brake light switch which needs way too much pressure to actuate the lights. I'll have to come up with a pedal switch replacement.


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 Post subject: Re: R.M. Classics Eight
PostPosted: November 6, 2018, 8:10 am 
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A nice touring locost!

What is the story behind the suspension pic and toe link? Plenty of brake capacity, but it looks like the joints are at an odd angle. Appears the ubj could run out of travel in droop. At ride height, the joint body should be squared to the spindle boss (center of the range of motion) for equal movement available in droop or bump. On these spindles, the upper boss appears to slope down inward about 10 degrees but the joint is tilted up about the same amount. I guess you were running out of joint movement in bump?

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 Post subject: Re: R.M. Classics Eight
PostPosted: November 6, 2018, 11:17 am 
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Joined: November 4, 2016, 10:00 pm
Posts: 13
Location: Winnipeg
Thanks for the observation, I think the joints look like they're at an odd angle because the steering tie rod is disconnected and the wheel is at full deflection. You're also seeing the "before" picture, I was just trying to show the brakes. Further work was done later in the build.

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 Post subject: Re: R.M. Classics Eight
PostPosted: May 2, 2021, 8:29 pm 
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Joined: March 30, 2021, 5:27 pm
Posts: 1
This might sound like deja vu but I have recently purchased an unstarted rm-eight kit. This was done entirely on the net and I have seen only pictures to this point. The deal included the spaceframe chassis assembly and all the body fiberglas panels in blue and white. There is also a Pinto engine from the early 70,s with twin downdraft Webers and the matching inlet manifold and a mated Ford four speed gearbox, brakes all round (but not sure what they are from), steering rack but no column or wheels, driveshaft and complete rear end assembly. There is also a Lotus 907 engine and gearbox which need rebuilding. I suppose that there could well be other small items as well but that is the major list at this point.
Because of the Pandemic I have no idea when it will be possible to actually get all this stuff here but it does leave a lot of time for researching and planning.
So, as was said before on this forum, I am looking for any advice which you might have on how to best proceed from here. The front suspension certainly appears to be an area which will require a lot of advice!


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