05-27-2013, 11:08 PM
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#151 (permalink)
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Batman Junior
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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garbage bag skin looks... garbage baggy
Tail update - yes, I'm still working on this!
I gave it 2 coats of oil-based paint. Then I started wrapping it in 3mil plastic on the weekend. To be honest, it looks like what it is: something wrapped in garbage bags! I had been hoping for better aesthetics, but the spray adhesive reacted with the plastic or oil paint, and it turned out wrinkly. Not sure if this plastic will shrink if heated, but I may try that.
Mostly, I've just adjusted my expectations!
I just keep reminding myself: this is a proof of concept; As much as it would be a bonus if it turned out pretty, I'm not going to spend a lot of time on finishing work.
Pics to come.
I'm going on a ~350 km trip next weekend, and this weatherproof cardboard tail will be on the car. If the weather cooperates, I'm expecting ~100 MPG (US) for the round trip, with a target cruising speed at the posted limit (80 km/h - 50 mph).
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05-28-2013, 08:37 AM
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#152 (permalink)
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40-60-40 MPH P&G
Join Date: Feb 2011
Location: laval, QC
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350km? are you going through montreal ?
__________________
Best Tank (1557.2 Km): 2.57 LHK (91.63 MPG (US) )
Best Highway Trip (~36.8 Km): 2.16 LHK (109 MPG (US) )
Best Commute Trip avg (73.8 Km ): 2.33 LHK (101 MPG (US) )
 Echo-Troll Modding Thread
I know i dont have a very good write-up 
no lean-burn? no good gear ratio? p&g is the answer
MPG=1 TIME=0
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05-28-2013, 10:08 AM
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#153 (permalink)
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Batman Junior
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Heading the other direction, actually! (Picton/Sandbanks)
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05-28-2013, 02:03 PM
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#154 (permalink)
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Master EcoModder
Join Date: Jul 2010
Location: Belgium
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Quote:
Originally Posted by Xist
You would attach those with cloth glue?
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ZigZag tape comes as a self-adhesive tape.
It wouldn't be much trouble to reproduce it in cardboard and glue it on though 
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Strayed to the Dark Diesel Side
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05-28-2013, 02:12 PM
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#155 (permalink)
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Master EcoModder
Join Date: Jul 2010
Location: Belgium
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Quote:
Originally Posted by pascal28
Serrated nozzles on aircraft engines are for noise reduction. They have a slight efficiency penalty.
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The old "lobed" nozzles reduced efficiency - i.e. 707 / DC-8 hush kits - along with noise.
But what I remember reading about the 787 serrated rear edges is that they improved efficiency ... while still cutting down noise and vibes.
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Strayed to the Dark Diesel Side
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05-28-2013, 02:15 PM
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#156 (permalink)
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Master EcoModder
Join Date: Jul 2010
Location: Belgium
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Quote:
Originally Posted by freebeard
/silly vortex generators
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They're not silly.
A simple strip of 1 to 1.5 mm high VGs undeniably changed the air flow pattern on Hägar's A pillar and side windows, quietening wind noise as well.
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Strayed to the Dark Diesel Side
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05-28-2013, 02:28 PM
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#157 (permalink)
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Master EcoModder
Join Date: Dec 2008
Location: Southern WI
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Quote:
Originally Posted by euromodder
They're not silly.
A simple strip of 1 to 1.5 mm high VGs undeniably changed the air flow pattern on Hägar's A pillar and side windows, quietening wind noise as well.
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Agreed !
I've seen several YouTube videos where they are placing vortex generators on airplane wings, and it makes them more efficient, especially considering the purpose: to keep flow from separating prematurely.
Jim. |
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05-28-2013, 02:41 PM
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#158 (permalink)
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Not Doug
Join Date: Jun 2012
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Quote:
Originally Posted by euromodder
ZigZag tape comes as a self-adhesive tape.
It wouldn't be much trouble to reproduce it in cardboard and glue it on though |
This has adhesive on it?
Quote:
Originally Posted by euromodder
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06-01-2013, 07:59 AM
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#159 (permalink)
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Batman Junior
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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I suspect zigzag tape would only "work" where there's laminar flow. It's just too thin, and the boundary layer is way too thick and turbulent over most of the car -- and getting worse the further back you go.
---
Plastic wrapped tail turned out not horrible!
A heat gun blowing all over the 3 mil plastic worked reasonably well to smooth it out. It was VERY wrinkly before -- even after trying hard to make it taut while laying it on the spray adhesive.
I'm leaving this AM for a long-ish weekend highway trip. Fingers crossed for the "big 100" ... |
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06-01-2013, 10:11 AM
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#160 (permalink)
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Cyborg ECU
Join Date: Mar 2011
Location: Coastal Southern California
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Safe travels!
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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