normal approach descent rate and VRS
Joined: Feb 2002
Posts: 325
Likes: 0
From: Australia
Thanks Nick....
Just taking that one step further......
Assuming you simulate the 2.5 minute power setting with a lesser figure for training....once a failure is introduced and the pilot sets Vtoss with this training power setting, [a constant] the aircraft climbs at a certain ROC.
Without touching any power setting, but just "beep' the aircraft to Vy, the aircraft's ROC will decrease.
Then without adjusting any power setting "Beep" the IAS back to Vtoss and watch the ROC increase.
I thought it may be a transient 'benefit", so I allowed the aircraft to stablise at Vy for a minute, but yet Vtoss still gave a better ROC????
It happens in practice, but its difficult to get a good explaination that can be passed on.
Assuming you simulate the 2.5 minute power setting with a lesser figure for training....once a failure is introduced and the pilot sets Vtoss with this training power setting, [a constant] the aircraft climbs at a certain ROC.
Without touching any power setting, but just "beep' the aircraft to Vy, the aircraft's ROC will decrease.
Then without adjusting any power setting "Beep" the IAS back to Vtoss and watch the ROC increase.
I thought it may be a transient 'benefit", so I allowed the aircraft to stablise at Vy for a minute, but yet Vtoss still gave a better ROC????
It happens in practice, but its difficult to get a good explaination that can be passed on.
Last edited by Red Wine; 10th November 2003 at 18:43.
Joined: Apr 2003
Posts: 3,012
Likes: 1
From: USA
Red Wine,
I think part of the thing you are seeing is that you must readjust the collective during speed changes, especially at low speeds, since the inflow velocity is an important part of the flow equation. When you leave the controls untouched, don't confuse that with leaving the power constant. If you do not raise the collective, the torque will fall somewhat, and the climb will deminish.
I think part of the thing you are seeing is that you must readjust the collective during speed changes, especially at low speeds, since the inflow velocity is an important part of the flow equation. When you leave the controls untouched, don't confuse that with leaving the power constant. If you do not raise the collective, the torque will fall somewhat, and the climb will deminish.
