It's 235 watts. Or something like that. Did a test and everything. Killed myself. My heart rate chart looked like the snake that ate the elephant. Or a hat. Right down to the slight taper towards the end of the hump.
And I did a massive 235 watts for 20 minutes. 226 watts for 30 minutes (that taper, remember?). 161 bpm for the entire period. Killer. Since I sat up after 30 minutes my 60 minute number looks a bit normal for me - 182 watts.
Ah well. I'm a Cat 3. What can I say.