crx-hf front aero clip

[larrybuck]

Just curious what your previous mpg figure was for comparison sake?

You mentioned high speed.... 70mph, 75mph???

Thanks, nice work!

[darrylrobida]

Yes, 75 to 80 tested to 90.

[ron]

not many use a manometer . that build looks real nice I'll look for you next time I'm on 166 headed out of town. and I'm going to use the RNfiberglass I've got my ribs cut just need more time in a day

[darrylrobida]

Just make certain that no moisture gets under the RNfiberglass or it will delaminate.
So, paint all your edges thoroughly with the latex paint. Then I have found it to
be very durable.

[RiderofBikes]

have you thought about laying actual fiberglass over this using it as a positive mold?

Putting Aluminum foil over it first that way you don't actually ruin anything at all and releases easily, you could complete it for about $100 or less...

[aerohead]

Originally Posted by darrylrobida

3mpg is an estimate. That figure is for high speed freeway driveing. As to how I measure MPG. I've tried computers and Mpguino and have come to a conclusion.
I will use a graduated cylinder for gas volume and a calibrated rear trailing bicycle wheel.
Also, why doesn't anybody blog about using a manometer to measure vacuum behind the vehicle?

The vehicles near wake can be an extremely complex blend of eddies,full-blown turbulence,and upper and lower corner vortices.
You would need to do a very accurate 10 or 20-position pitot-tube traverse of the near wake,average all the pressures,then see if any one specific sampling position happened to represent the mean average pressure.Then from there on out,do all your sampling from only that location.
Short of that,we'd be guessing as to the actual wake conditions back there.

[darrylrobida]

Mr. Aerohead, Thanks for the great info about manometer usage as applies to
vehicle wake.
Next:
I have plans to build a surface mount radiator, thus eliminating all front air intake.
I would like your opinion about how much this might improve the aerodynamics.

[sheepdog 44]

Originally Posted by aerohead

The vehicles near wake can be an extremely complex blend of eddies,full-blown turbulence,and upper and lower corner vortices.
You would need to do a very accurate 10 or 20-position pitot-tube traverse of the near wake,average all the pressures,then see if any one specific sampling position happened to represent the mean average pressure.Then from there on out,do all your sampling from only that location.
Short of that,we'd be guessing as to the actual wake conditions back there.

What are your opinions about whether there is downforce from the front increasing drag?