From Kruezotter: kept all rider weight and height, bike weight, elevation, grade, and wind constant.

Variables used: Riding in drops: Cd*A=3.6567, riding tri-bike: Cd*A=3.0304

At a constant 350 watt output, rider travels at 25.7 mph in drops, and does a 40km TT in 58 min. Same output, rider travels at 27.3 mph on tri-bike, and does a 40km TT in 54.6 min. Speed increased 1.6 mph (6.22%), and rider saved 3.4 min.

At a constant 150 watt output, rider travels at 18.9 mph in drops, and does a 40km TT in 1 hr 18.9 min. Same output, rider travels at 19.9 mph on tri-bike, and does a 40km TT in 1hr 14.9 min. Speed increased 1 mph (5.29%), and rider saved 4 min.