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Old 07-21-2023, 06:19 PM   #731 (permalink)
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Rivnuts really like to pop out of the plastic trim versus the metal sections. Second time this has happened in different spots

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Old 07-22-2023, 10:04 AM   #732 (permalink)
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The upset section is a minor diameter increase, not enough to stop or avoid the plastic elongation. Do you have enough space to put a washer on the back side or is it a truly blind install?
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Old 07-23-2023, 11:41 AM   #733 (permalink)
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Quote:
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Rivnuts really like to pop out of the plastic trim versus the metal sections. Second time this has happened in different spots
Use special nuts instead:
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Old 08-01-2023, 02:41 AM   #734 (permalink)
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https://link.springer.com/article/10...48-021-03334-0

abs sheets should be coming this week to make the finalized side cavity fins
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Old 08-02-2023, 11:10 PM   #735 (permalink)
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May try pizza pans for front wheels but not liking the “ curve” on the edges. Any suggestions for a super flat but sturdy material I could use as a wheel cover?
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Old 08-03-2023, 01:08 AM   #736 (permalink)
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Why would you want super flat? A slight crown adds strength. Flat surfaces will show any imperfection when they are rotating.

Get some (oversize?) pizza pans, drill a small hole in the center and spin form them just like Moon does. Steel would be harder than aluminum, but I think two handheld caster wheels might do it.
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Old 08-03-2023, 02:22 AM   #737 (permalink)
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Why would you want super flat? A slight crown adds strength. Flat surfaces will show any imperfection when they are rotating.

Get some (oversize?) pizza pans, drill a small hole in the center and spin form them just like Moon does. Steel would be harder than aluminum, but I think two handheld caster wheels might do it.
id only attach them for long road trips because constantly applying duct tape is a pain. id do thin abs plastic, but cutting a perfect circle would be too hard
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Old 08-03-2023, 01:41 PM   #738 (permalink)
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May try pizza pans for front wheels but not liking the “ curve” on the edges. Any suggestions for a super flat but sturdy material I could use as a wheel cover?
MOTORTREND aero-modded a Porsche GT3 for a long-distance mpg test and made 'janky' coroplast wheel covers, zip-tied onto the wheels.
Just to see what they did, you might cobble something like that together, just long enough to see if they made a showing.
'Flat' covers make a great diaphragm, drumhead. You'd have to appraise how much your wheels could support them against 'flutter.'
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Old 08-04-2023, 12:54 AM   #739 (permalink)
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Quote:
Originally Posted by aerohead View Post
MOTORTREND aero-modded a Porsche GT3 for a long-distance mpg test and made 'janky' coroplast wheel covers, zip-tied onto the wheels.
Just to see what they did, you might cobble something like that together, just long enough to see if they made a showing.
'Flat' covers make a great diaphragm, drumhead. You'd have to appraise how much your wheels could support them against 'flutter.'
do you have a link to that test?
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Old 08-07-2023, 01:06 PM   #740 (permalink)
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Quote:
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id only attach them for long road trips because constantly applying duct tape is a pain. id do thin abs plastic, but cutting a perfect circle would be too hard
I have experimented with flush coroplast wheel covers. You can make a compass out of an old yardstick with a hole drilled for a screw to spin it in the coroplast and another hole for a sharpie marker. Cut them out with old fashioned tin snips. I used 3 wire ties each and just snipped them to remove them. I did a study of them if you search posts started by me. There was a slight improvement but I think I get more of an improvement from my homemade belly pan/diffuser.

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The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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