A car in the supermarket carpark - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

aerohead · 01-15-2021, 01:02 PM

The only thing I can make of it is, that those leading structures are hiding a particular type of hinge which allows the hatch to clear the roof when it's raised, rather than be immediately broken off, or jam.

freebeard · 01-15-2021, 02:10 PM

I could see an external hinge, but they went out of style in the 1950s.

JulianEdgar · 01-15-2021, 04:25 PM

Quote:

Originally Posted by aerohead

The only thing I can make of it is, that those leading structures are hiding a particular type of hinge which allows the hatch to clear the roof when it's raised, rather than be immediately broken off, or jam.

Wrong again!

aerohead · 01-15-2021, 04:32 PM

Quote:

Originally Posted by JulianEdgar

Wrong again!

From the perspective of your photograph, it appears that those structures would have either penetrated the roof or broken off.
I don't have the car to examine.
I've had to confront clearance issues like this with my own projects.
Civility is nice too!

JulianEdgar · 01-15-2021, 04:42 PM

Quote:

Originally Posted by aerohead

From the perspective of your photograph, it appears that those structures would have either penetrated the roof or broken off.
I don't have the car to examine.
I've had to confront clearance issues like this with my own projects.
Civility is nice too!

Did you click on the photo and enlarge it? Look at the shape of the inner skin? It shows no such projections.

aerohead · 01-15-2021, 05:12 PM

Quote:

Originally Posted by JulianEdgar

Did you click on the photo and enlarge it? Look at the shape of the inner skin? It shows no such projections.

The light-green car with its hatch open?
I never saw anything in the video which helped explain the hinge.
If the light-green car has the same rear spoiler as the original image, I don't see how the hatch could possibly open without interference.

freebeard · 01-15-2021, 05:46 PM

A recessed hinge has the edge move outward and forward. This is really a minor detail compared to it's function.

I found a Jetta deck-lid spoiler that is the right width and curvature to match up to the Metro. All it needs is sail panels. I'll take a pic.

JulianEdgar · 01-16-2021, 02:47 AM

Quote:

Originally Posted by aerohead

The light-green car with its hatch open?
I never saw anything in the video which helped explain the hinge.
If the light-green car has the same rear spoiler as the original image, I don't see how the hatch could possibly open without interference.

As it happens, today I saw a Mirage without its spoiler! And it had those two little forward bumps in the roof (note: not the side ones that I talked about in the video).

So yes, maybe the forward bumps are for the hinges (even though it doesn't look like that from the inside view).

So in this case I was too quick to dismiss your point, and I apologise for that.

Cd · 01-16-2021, 08:20 AM

You might find these photos useful .

gumby79 · 01-23-2021, 11:45 AM

Gurney flap only applies to Wings ok ,what is the proper technical term to describe a gurney flap shaped protrusion on a Leading Edge attached wing AKA spoiler?
Why does the rule book for Bonneville ,El Mirage, ect LSR say that Granny flaps are allowed on a Bonneville spoiler, the same rule specifies that the Leading Edge of the wing be attached therefore it is a spoiler with an allowed Gurny Flap? I don't know of a more technical writing than a rulebook for racing.

Southern California timing Association 2019 rules and Records , Rule # 4.CC.8 pg60 , 1 , "Gurney flaps are allowed but cannot extend above or behind the spill plates" (2"aft or 8"above)