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  #1  
Old 21st May 2017, 08:20 PM
TalonMotorFabrication TalonMotorFabrication is offline
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Default Drawing chassis in Woogle Sketchup

Sat here bored witless (now with added head ache) decided to start redrawing the book to TMXR guild in Google Sketchup same as the 3D drawings in the book, bare in mind it's been quite some years since I made my build table/jig.... I must have ignored most of page 34 and used fabricators method of measuring square corner to corner as none of the numbers on page 34 of the book bare any relation to the tube appendix once it's built???
No wonder people have produced chassis that are 10mm out by the time they get to the front..............
So I'm going to produce lower chassis rail drawings that the book tube appendix builds not what page 34 says it should be which is 5mm out, maybe future builders will avoid the same head ache.
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Old 24th May 2017, 10:53 AM
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alga alga is offline
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Seriously? Everyone who's built their chassis from scratch per the book marked out their build table from this drawing, and certainly in my case the tubes fell into their places like pieces of the puzzle.

I did a quick check with the calculator, and it seems that the 1118 diagonal is an error, it should be 1148.6. Other numbers look OK, 1313 is in fact 1312.5, and 808 is 807.7.

The length of BR1/BR2 is 993.27 based on this plan (993 in the appendix) , and BR3/BR4 should be 584.34 (584 in the appendix).

So basically other than the 1118 diagonal all other measurements are true, rounded to a millimetre.
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Old 24th May 2017, 09:15 PM
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twinturbo twinturbo is offline
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My (It's not google) sketchup chassis base is on there somwhere.

I don't remember it causing any issues, but it's a good few years since I drew it up.

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  #4  
Old 25th May 2017, 07:51 AM
TalonMotorFabrication TalonMotorFabrication is offline
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I should clarify that I drew the chassis in Sketchup using the tubes in the book which produced a very different shaped result to that on page 34. BR3+4 are not at a true 10 deg which puts BR1+2 out of place as a result, I've had flat pack builders tell me that their chassis are +/- 5mm out in overall length.
I've changed the drawings to read as outside corner to corner measurements which should be easier to do using a tape as intended rather than trying to read internals with a floating tape measure.
Sorry for any confusion caused.
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Old 25th May 2017, 07:59 AM
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https://3dwarehouse.sketchup.com/mod...ster-Chassis-a

at least 3 of us have tried, there was a much more fully complete one somewhere too.
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Old 25th May 2017, 08:01 AM
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may be this mash up.

https://3dwarehouse.sketchup.com/mod...d-Locost-Frame
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Old 25th May 2017, 05:57 PM
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mopple drew the chassis in Solidworks: https://grabcad.com/library/haynes-roadster-chassis
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