Quote:
Originally Posted by beate
I think i know that table. It should show an entry of the 2nd generation successor the the 3, namely the Evo-R.
But a sign of the three becoming a classic is that prices are somewhat higher than those of, say a Quest or a Mango of the same age, an despite of that, a three is usually sold within a few days or maybe weeks (unless the price take is completely unreasonable).
For now i'm going to concentrate my efforts still in the front wheel area and then doing some improvements of the roof. . And then improve the stiffness of the drive train ... which is quite a large program for this year.
As soon as the wheel boxes are done i might again do some tests of my tailbox.
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I checked my human powered vehicle performance table, and for trikes, could only find VECTOR:
68- pounds ( approx. 30.9 kg )
27-inche rear tire ( 675mm )
24-inche front ( 609.6mm )
Cd 0.11
Frontal projected area= 4.56-square-feet ( 0.423 meters-square )
CdA 0.5-square-feet ( 0.0464 meters-square )
Rolling resistance coefficient (Cr) 0.0045
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Fachsenfeld's 1951 book shared results from symmetrical wing testing he and Kamm performed at the FKFS.
With an airfoil of 21.3% thickness, the drag coefficient varied from 0.58, with zero aft-body, to 0.065, with the complete tail, in a drag table illustrating six different 'Jaray-type' tail length iterations.
Kamm-type truncations demonstrated remarkably-higher Cds at the same fraction of total tail lengths, except the final, full-length tail, which is identical to the Jaray-type.
It will be interesting to see how the tailbox contributes to the performance.