Helitester;
Its' actually quite a smooth upward acceleration, the surprise comes on the reject, where in the words of the RFM you should "go light in your seat" Training for that profile is now done in the sim with occasional demos with both engines running in the aircraft. The problem is the propensity for pilots to hit the tail in the touchdown (RTO managed that a couple of times I believe) Certainly the S76 vertical, which is a true vertical with no rearward part is the most aggresive PC1 take-off I have ever flown (and I do it most days), but the power application should be smooth, yank it in and there are good opportunities for an over torque. Every other PC1 takeprofile I have ever tried is a very gentle and controlled experience,
SND