Thighmaster posed a question that got me thinking about IP v OOP in time trials. How do the tandem racers ride? The elite teams are IP. And these teams spare no expense to have the best equipment and in some cases buy and rig tandems just for racing. So tonight, I put the cranks IP and we went on a 30 mile ride with 2000 feet of climbing and an interval session. The ride was inconclusive other than to say that at full power with smooth pedal stroke, I do not see a difference in bike handling or perceived power production (no power meter) and there was no whooshing sound linked to cadence. However, I am suspicious at higher speeds that OOP may have more aero drag due to the out of sych nature of the legs. Last week, I sent an email to the guy that has the tandem simulator in Germany posing the question but I have not received a response.
Edit: I did observe our acceleration from a standing start was faster IP. This alone can be worth 10 - 20 seconds for the start and turnaround.