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Old 12-13-2015, 05:27 PM   #1 (permalink)
...beats walking...
 
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40 CFR 86.129-80 Road load power...

For Aerohead et al: https://www.law.cornell.edu/cfr/text/40/86.129-80

...especially this graphic & table:



Table I—Protuberance Power, P. Versus Total Protuberance Frontal Area, Ap

Ap (sq. foot) P (horsepower)
_____Ap <0.30 0.0
0.30 Ap <0.60 0.40
0.60 Ap <0.90 0.70
0.90 Ap <1.20 1.00
1.20 Ap <1.50 1.30
1.50 Ap <1.80 1.60
1.80 Ap <2.10 1.90
2.10 Ap <2.40 2.20
2.40 Ap <2.70 2.50
2.70 Ap <3.00 2.80
3.00 Ap ______3.10



NOTE: CFR = Code of Federal Regulations.


Last edited by gone-ot; 12-13-2015 at 06:27 PM..
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Old 12-14-2015, 04:50 PM   #2 (permalink)
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protuberance

It looks like we could construct a Cartesian grid from the posted data,from zero,to 3.0 sq-ft frontal area of the greenhouse,then extrapolate for larger 'roofs', picking off their 50-mph road load from the grid.
Months ago,I was working on a side elevation drawing of this illustration,which included the wheels,to evaluate the aft-body contour based upon overall height.
It's buried somewhere in the rat's nest.

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