Anyone interested in modeling / printing brake duct inlet for race car?

Would anyone be interested in taking on the challenge of designing and printing a brake duct inlet for the lemons car?

It would look like the following but made to the size of the holes already in bottom of bumper.
http://www.amazon.com/gp/aw/d/B006K8K8HG/ref=pd_aw_ty_recs_1?pi=SY115

This is just the inlet for brake duct, so it doesn’t need to withstand any heat. Would be possible to just make a simple bracket out of sheet metal, but thought someone might be interested in the challenge of 3d printing one. Plus it would be a big step up from the all duct tape based inlet we used last year. (Auto will pay you for filament costs)

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@Brandon_Green… It might help to know how important it is to have it printed in one piece or not, as I noticed the size is a bit larger than the print beds on the printers we have at the 'Space. “Design” is not one of my strong points; however, it would be neat for others - who do design well - to be able to say they helped! :slight_smile:

It could be any number of pieces, only requirement is that it keep the brake duct there(3" diameter) and not fall off. Last year it looked like:

lol Awesome! haha…

Looks like it’d be fairly easy to improve on last year’s “design” :wink:

Hopefully someone will take you up on this! :slight_smile:

Another thing someone could print off and paint would be this small blue shell, would make a good hood ornament in addition to the rest of the car being themed with spikes and blue / white / tan colors

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I’d love to give it a shot, but I don’t quite have the skill set mastered yet. I know you guys are on a pretty tight schedule at this point. Hope you find someone to give it a go. That would be pretty awesome.

We have 5.5 weeks left before race weekend (Feb 27th - Mar 1), so we still have a bit of time. Not having the skill set mastered yet sounds like exactly a reason it would be good to try doing!

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I was thinking you were down to a week. 5 weeks might be doable. I’m planning to be at the 3d and laser classes the 28th. I’ll make some measurements ( unless you already have them ) next time I’m at the space. Sounds like fun.

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I’d be interested in printing out the hood ornament, acetone smoothing it and painting it. I’m also up here for the laser and 3D printing classes on the 28th so I’ll try and figure out the scale and mounting needed. Aside from that, I can twist a bolt fairly well but have little other mechanical skill.

-the purring dork

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Thanks, we are still lacking a hood ornament

I put this model together based only on the screenshot from Amazon and the two dimensions given.

Might be too tall. Made with 0.10" thick walls on sides, 0.20" thick flange and pipewall. I can email the sketchUp 8 file to anyone who would like to take this further. I’ll put the file on the User drive when I arrive at the DMS tonight (Thursday).

Mike C - aka Hank Cowdog

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I’ll try to print a fairly good sized (~3-4") blue shell when I’m at the space next. I could help with the brake duct if I have time.

What are you doing about the turtle shell spikes? Will those be printed too?

I actually made a mockup of the turtle shell yesterday to gauge the correct size and came to 5" in height (from the top of the middle spike to the bottom). I’m also going to modify the model to include the needed threads on the underside for mounting to the hood. I should be printing the turtle shell later today or this coming Wednesday but could probably use some help on the painting and acetone smoothing.

-the purring dork

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Cool if print it, I can show you how to acetone vapor it. We have a deep-fryer and acetone in 3D fab, it’s a pretty nasty process but works in like 30 seconds. painting is pretty easy after that, we just need acrylic paints (see if Art room has the colors needed)

you might try the cold acetone method for something that large

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I had told Brandon that a big project had come up and sucked up the next two weeks from my schedule. That project has now been canceled, so I’m back at the duct design. I need to print a template / mockup of the forward part to verify fit, and I’m working thru the design of the back part. Might be able to be at the space tomorrow night. We shall see.

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It might be cool to do something with a loft operation in Inventor, but I don’t know the best ways to get measurements for splines like this.

That has an added 90 degree bend towards the brakepads (which would make it nasty to print), but it could be done in sections too.

Looks good, but just needs a 3" connection heading straight back, the brake ducting hose itself will curve towards the rotor(has to move with steering angle)

Makes sense on no bends.

Tough part is just getting the shape of the front kosher (lofting that shape to a circular hole is super easy). I started this sketch with a 2D sketch (consisting of splines) in the XY plane. In reality, it probably should also “bend” slightly around the Y axis to fit the shape of the front bumper properly. This means a 3D sketch, but I have no idea how that could all be measured properly to get it all to fit.

It could probably be done with a flat 2D sketch and some trial and error to see how well it fits. Perhaps a laser cut front panel could be experimented with until the shape is ideal? Or get it close, make the front plate pretty a bit over sized and cut/sand to desired form.