Where does one find the aero/teardrop mirrors as seen on some of the cars in the banner photo?
Where does one find the aero/teardrop mirrors as seen on some of the cars in the banner photo?
Many cars use the SPA mirrors available at Pegasus.
Aero mirror web site is Racemirrors.com. Neil
Has anyone used these and any feedback?
I don't use them personally just because of the cost, but just about every FF and FF2000 car over here uses the elliptical ones. Not sure if they are from the same company.
Old, cheap, square ones that came on the car work for me.
We used them, expensive and very very fragile.
Scotty
I have used them and I think the mirror quality on the spa convex are better. Just seems clearer on the spa mirrors.
Just my 2 cents.
Brian
I can hardly remember now but years ago I was told that on an Indy car in the wind tunell these mirrors were like adding 15 HP.
Hybels
Surely you mean 1.5, not 15 HP.
http://www.racemirrors.com/Advanced%20Technology.htm
See wind tunnel results.
15hp per pair, or each? Heck, I'd screw them on all over the place until I reached at least 500hp.
------------------
'Stay Hungry'
JK 1964-1996 #25
alright already. I guess my memory failed me.
There are two things about being 67: One is your memory gets bad and I forget the other.
BTW only two people here are contributing members. Come on now boys. Look how much fun you had making me wrong.
Hybels
Of course thanks to the nature of aerodynamics, specifically its mathematically cubic nature, and what are relatively low average speeds of the cars most of us run, these mirrors mean somewhere between diddly and squat. That is unless of course you added up the horsepower advantage they gave you over say, an entire season, or perhaps your desire for slick looking mirrors.
Chris Livengood, enjoying underpriced ferrous whizzy bits that I hacked out in my tool shed since 1999.
Chris,
Thank you for that. I figured bolting aero mirrors on my Eagle would do as much as spreading KY all over the body before a run.
Happy New Year,
Jacques
Jacques N. Dresang
Kettle Moraine Preservation & Restoration
1977 All American Racers Eagle DGF #005
1972 Elden Mk10B AM73-49 - #140/1
Chris Livengood, enjoying underpriced ferrous whizzy bits that I hacked out in my tool shed since 1999.
Depends on the car and the track. At a track like RA, if you are getting close to terminal velocity, an extra horsepower or two can make a difference. (the wind tunnel testing didn't specify if the .93 HP was each mirror or for the pair. If it is each, thats a big difference) if your engine builder offered you an extra HP for $300, would you say no?
Assuming standard day atmospheric conditions and no interference effects between the car and the mirrors, here is the power required to push a pair of 6 square inch mirrors of various shapes through the air at 150 mph:
2.01 hp cube (Cd = 1.05)
0.90 hp sphere (Cd = 0.47)
0.80 hp half sphere with flat aft face (Cd = 0.42)
The last one comes closest to a realistic mirror housing shape. I'd say that either there were significant interference effects between the car and mirrors, or the racemirrors generate thrust.
This paper is pretty much on point:
Aerodynamics of F1 Car Side Mirror
By
E. Rind and Z. W. Hu
Report No. AFM-07/06
2007
UNIVERSITY OF SOUTHAMPTON
SCHOOL OF ENGINEERING SCIENCES
FACULTY OF ENGINEERING, SCIENCES AND MATHEMTICS
Brian
All this information is great but when the mirror breaks off in the middle of the race and you have only half the number of mirrors you started with that's the best aero package of all, but's it's sure is not much fun.
Scotty
everyone seems to be talking about very fast formula cars. I run a vee and not sure for us if it makes much difference. I do have a very nice set of carbon mirrors that the previous owner (Jim Kearney) put on.
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