Jan 9

Jan 9, 2005

Drag values

I received some new drag values for a couple of commercial velomobiles today, so I added them to the table along with links to additional information. New additions are the Flevo Versatile and the Mango velomobiles. I also sorted the table from the fastest to the slowest.

What is very surprising is how poor the commercial velomobiles are. By looking at the photos, I would imagine it has quite a bit to do with their width due to fitting the trike wheels into the fairing, and the blunt noses. It is surprising though, that the Rocket seems to have a slightly lower CdA and it's trike wheels are OUTSIDE the fairing and NOT faired.

If anyone knows of additional CdA values for streamliners, HPVs, recumbents, bikes or velomobiles, please forward the information to me and I'll add them to this list. Also - if anyone is aware of any incorrect information here, please also let me know.

HPV Image Name CdA sq meters CdA sq feet Speed @150 watt output
Virtual Edge 0.011 .118 60.8 kph
Varna Diablo 0.02 .215 55 kph
M5 #8 fairing 0.0255 .274 52.3 kph
Cheetah 0.0278 .299 51.5 kph
Cutting Edge 0.0286 .307 51.2 kph
Bean II 0.0289 .301 51.5 kph
White Hawk 0.031 .324 50.7 kph
Vector Trike .046 .5 46 kph
Gold Rush 0.0465 .50 46 kph
Barracuda 0.055 .592 44.4 kph
John Tetz - Zote Streamliner .055 .6 44.2 kph
Quest velomobile .092 1.0 37.7 kph
The Rocket
(estimated)
.11 1.18 37.5 kph
Mango .12 1.3 36.5 kph
Mark Olaf Slot - Optima Baron .147 1.58 34.7 kph
Versatile .176 1.9 33 kph
Leitra velomobile .178 1.91 33 kph
DF Racing bike (using aerobars & disk wheels) 0.23 2.4 31 kph
Easy Racer (no fairing) 0.27 2.9 29.4 kph
Sonny Kallehave - High racer .3 3.22 28.6 kph
DF Mountain bike 0.50 5.38 24.7 kph
DF Racing bike (hands on top of bars) 0.51 5.4 24.7 kph
DF Standard bike 0.68 7.3 22.6 kph

All Cr (rolling resistance) set to .0060
Temp = 21 degrees C
Pressure = 30 " mercury
weight = 230 lbs including rider


TCR Do LIST:

1. Strut slot sliders - Simplify to a folding cover
2. Canopy Bubble - make a sliding convertible top
3. Front wheel well - Make glass version
4. Wingnuts for fairing mounts
5. Electrical - rechargable battery with a panel with switches for rear strobe and front headlight
6 Add a second front caliper brake
7. Make a portable wind trainer using the (mini-rollers)
8. Look into painting the fairing
9. Find a helmet that fits in the bubble
10. Add second brake

TOTAL distance on TCR1
866 km


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