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Learning how to build Lotus Seven replicas...together!
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PostPosted: July 15, 2008, 11:06 pm 
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It could be worse... :P

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Made of carbon fiber rods... bare frame weight 2.7 lbs.

http://www.bmeres.com/c-thruframe.htm
.

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PostPosted: July 16, 2008, 3:04 pm 
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That's just goofy.

Is saving what...5 pounds?...worth all that drag? No way.

-dave

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PostPosted: July 16, 2008, 3:40 pm 
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I had a 3 lb. aluminum frame mountain bike way back in the day about 7 years ago. It was a KHS Alite Team. An awesome hardtail. That thing is just silly. A good hard crash and the rider will look like they got hit by one of those Isreali flachette grenades.

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PostPosted: July 29, 2008, 1:24 pm 
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If you are using a miter saw with a metal cutting blade then all you should have to do is set the saw angle at 14 degrees and the base angle for 14 degrees and all should be good for the LA part right?

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PostPosted: July 29, 2008, 2:06 pm 
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Harponian wrote:
If you are using a miter saw with a metal cutting blade then all you should have to do is set the saw angle at 14 degrees and the base angle for 14 degrees and all should be good for the LA part right?


Basically a compound mitre saw seems to be the cheap saw of choice. Certainly helps. I still had issues with the W pieces, mostly because for too long I thought 52º plus 48º equalled 90º :roll:


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PostPosted: August 16, 2008, 9:05 am 
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Not used this actual model, but I've got the circular saw I use for cutting steel plate and the cut off saw, and I like them.

I've been cutting 3/16" wall 1 7/8" OD tube on my cut off saw with no problems.

The circular saw has a depth of cut of 2" and will cut on the bevel. An angle guide for the other plane and it ought to be possible to cut compund mitres with that.

This is the miter saw, which does box section..

http://www.evolutionpowertools.co.uk/us ... rage3.html

Here in the UK they're not dear, they cut better than the abrasive variety, and are quick.

Bit on the noisy side though so the nieghbours might not like it.


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PostPosted: March 12, 2009, 8:50 pm 
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I done it the easy way and made it out of round tube this requires only one angle
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cheers Greg

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PostPosted: March 26, 2009, 6:36 pm 
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By yimminy thats one way around it!!!!!

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PostPosted: March 27, 2009, 12:57 am 
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I used the scribe and hacksaw method, I drew all the angles and then cut them. I stared at the CAD for a good 5 minutes making sure the angles were just right on the tubes with the right length, then took another 5 minutes to cut everything. It worked so well I didn't even have to grind it at all!

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PostPosted: August 3, 2009, 12:31 pm 
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This is a good little thread. It crosses off the list something I would otherwise buy. Hopefully by staying on the powered end of a hacksaw I'll be skinny enough to fit in it when it's done!


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PostPosted: August 3, 2009, 12:41 pm 
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Please reconsider those suspension brackets. They will see an offset torque and will fail due to them having little to no support. Welding a flat bracket to a round tube won't be reliable. If you choose to leave them as-is, please box them in with bracking to the sides of the tubes. Here's what's going to happen otherwise - note the crack:
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PostPosted: August 3, 2009, 6:04 pm 
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Is that a stress-riser I see on the far end of the crack KB58? Looks like a 90 degree notch, :(


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PostPosted: August 3, 2009, 9:13 pm 
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No, it's just the camera angle. The right side of the bracket is being pulled outboard by bracking force.

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PostPosted: August 6, 2009, 10:59 pm 
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KB58 wrote:
No, it's just the camera angle. The right side of the bracket is being pulled outboard by bracking force.


Do you explain "bracking force" in your book? I've never heard of that one. I suspect it describes excessive force placed on a bracket... am I right? :wink:

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PostPosted: September 27, 2010, 11:01 pm 
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has anyone thought of the bearing surface on those suspension brackets, since youe were talking about brackets???? i was wondering how long it would be before the holes elongated or the bolts failed???? I was also wondering if anyone ever checked those suspension bolts or the elongated holes after a few years of driving down the road with your loved one in the other seat beside you???? Any production car has substansial bushings and bobust brackets with oversized bolts going thru them. These are very important areas of concern.......................


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