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Learning how to build Lotus Seven replicas...together!
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 Post subject: Re: The Altimate Go-Kart
PostPosted: December 23, 2019, 1:03 am 
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Posts: 30
I haven't been able to spend much time in the shop the last couple weekends. But I did steal a couple hours out there Saturday morning. I added the diagonal support for the main hoop and started looking at how to build the engine mounts.

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 Post subject: Re: The Altimate Go-Kart
PostPosted: January 6, 2020, 3:22 am 
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I haven't spent much time on the build recently so there isn't much to update.

A tubular gusset added to the front motor mount.
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This picture shows the mock-up of the removable tube that goes over the engine. I added it so I could see what the profile would look like. You can also see the beginnings of the rear engine mount. I want to keep the area under the mount clear for the exhaust, that's why I mocked up this design. I like the 1" tubes triangulating from the upper frame rail to the rear suspension node but the cross tube will flex too much the way it is. In the end I'll probably drop a tube from the mount to the tube going between the lca mounts. Even though I was trying to avoid that.
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Thanks,
Jonathon


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 Post subject: Re: The Altimate Go-Kart
PostPosted: February 6, 2020, 12:55 am 
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I made the left side motor mount. It needs some bracing and a little polishing to be complete.

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 Post subject: Re: The Altimate Go-Kart
PostPosted: February 6, 2020, 8:02 am 
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I follow your thought process. Might be easier if you put everything in place to know your available clearance with standard mandrel bends and desired exhaust. Did the expected strut upper location help determine the upper rail location for minimal offset? Why did you step the tubing size down? The narrower-than-the-drivetrain chassis is interesting; kind of like a motorcycle with the engine sticking out. Nice welding!

I made a similar tool using welding rods through corrugated cardboard wrapped around the tube, with a little overhanging tape to keep the rods from falling out but wasn't all that useful since the tube has to be too long to line up. Hard to cut it longer!

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 Post subject: Re: The Altimate Go-Kart
PostPosted: February 10, 2020, 12:29 am 
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Miatav8,MstrASE,A&P,F wrote:
I follow your thought process. Might be easier if you put everything in place to know your available clearance with standard mandrel bends and desired exhaust.

It would definitely be easier. I need to order some exhaust pieces.

Miatav8,MstrASE,A&P,F wrote:
Did the expected strut upper location help determine the upper rail location for minimal offset?
I don't understand the question with regards to the "minimal offset".

Miatav8,MstrASE,A&P,F wrote:
Why did you step the tubing size down?
To save weight.

Miatav8,MstrASE,A&P,F wrote:
The narrower-than-the-drivetrain chassis is interesting; kind of like a motorcycle with the engine sticking out.
Hopefully it is strong and aesthetically pleasing when done.
Miatav8,MstrASE,A&P,F wrote:
Nice welding!
Thank you!

Miatav8,MstrASE,A&P,F wrote:
I made a similar tool using welding rods through corrugated cardboard wrapped around the tube, with a little overhanging tape to keep the rods from falling out but wasn't all that useful since the tube has to be too long to line up. Hard to cut it longer!
I know what you mean. I had to use two scrap pieces tacked in place to get the contour, then transfer that to the real part. It's a good tool but it takes some getting used to.
Thanks for the interest. I appreciate it.

Jonathon


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 Post subject: Re: The Altimate Go-Kart
PostPosted: February 10, 2020, 12:29 am 
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Joined: December 27, 2018, 5:15 am
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Oops double post.


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 Post subject: Re: The Altimate Go-Kart
PostPosted: February 10, 2020, 7:40 pm 
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Jonathon wrote:
I don't understand the question with regards to the "minimal offset".

Jonathon


I went back and looked at some earlier pics that answered my question. :cheers:

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