Pizza Sign Placement

[Patrick]

Originally Posted by Frank Lee

Too much stopping. Mount it to roof, cut hole in roof around the perimeter of the sign base, attach raise/lower mechanism and also self-actuated sliding cover for the hole.

There you go. Or if you have a sunroof, stick it just behind the sunroof opening. When out of range of the boss, open sunroof, reach up and remove sign, then close the sunroof. Voila!

[Spac3dog]

Could do like I did when the owners of the pizza shop I deliver for tried to make us put signs on our cars. I looked them right in the eye and said that's not going to happen because I don't like the idea of making it any more obvious that I could possibly be carrying a decent amount of cash to be robbed for. Never did put the sign on my car once.

[lunarhighway]

an aero friendly alternative would be window stickers or magnetic signs. the first would be cheap, but not possible to remove when not needed the later perhaps a little more expensive but easy removed

both would be aero neutral and maybe even more noticable than the roof mounted sign.

[aerohead]

Locally,Papa John's Pizza has a low drag,symmetrical airfoil shaped illuminated sign that their delivery drivers suction cup to their car's roof.
You might light a fire under your boss and see if they'll ditch the parachutes your now using and come into the 21st Century with the better advertising.
Looks like they would soon pay for themselves at the rate your losing.

[SwamiSalami]

Originally Posted by comptiger5000

How fast are you typically driving when you have the sign up there? If it's not over 35-40mph, the sign itself will make very little difference.

I respectfully disagree. Everything that I've read (which has been a lot) has provided that speeds as low as 25 mph can effect efficiency.

You're right in thinking that 35-40 mph makes more of a difference than 25 mph, of course. However, it is at this lower speed that we begin to see aerodynamics at play.

[SwamiSalami]

Originally Posted by Frank Lee

Mount it to roof, cut hole in roof around the perimeter of the sign base, attach raise/lower mechanism and also self-actuated sliding cover for the hole.

HAHAHAHAHAHAHAHA...awesome.

[brucey]

I also doubt you've lost 6 MPG from a small sign.

That being said, I've actually noticed some of the signs for cars seem to have been built with aerodynamics in mind! They have a teardrop shape with boat tail when viewed from above/below. I can't seem to find a picture of one, however.

[cfg83]

Verdann -

Ask if you can have two and figure out how to mount them in the rear window on each side. You might suffer from interior glare, though, so you'd need a black cover so that only the window-side is glowing.

CarloSW2

[khafra]

If you know where your flow separates, put the sign about 0.5m upstream. It's larger than optimal, but it might still do some good. I'm going to have to wait 'til I get home from work to reference the paper that recommendation is based on.

[larrybuck]

I' m glad Dr. Frank is not going to cut on my car (lol)

If you have some access to clear plastic. you could basically build front and rear ramp slopes to smooth it all out.

I agree that the nose to tail would be cleaner.

Now for strictly a purist aero talk, I'm picturing a typical '92-94 Metro here??

Not regarding police laws, I'm thinking the cleanest possible air position would have the sign nose to tail in the middle of the hood like a monster hoodscoop.