jsf,
This guy is "teaching" future instructors and has CAA FIC approval. He is the CFI and he was previously the CFI of Jersey according to his intro!!!!!
No I didn't make any comment and decided to check that I haven't got it all worng for the past 30 years!
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lawyerboy and johnm,
In this case the aircraft stalls while at 1g at 50Kt with the power off. Or put another way, in level flight at 51Kt, the angle of attack is just at the stalling angle.
When full power is applied and the nose pointer upwards, the thrust vector is inclined and part of this vector is added to the lift. Thus with full power applied we do not need so high an angle of attack at 51Kt because the thrust is partly assisting lift. So it follows that with full power we will be flying at a lower speed than 50Kt before we need the stalling angle of attack to maintain 1g flight.
As for the elevator authority.......basically, this guy in one sentence says that if you close the throttle and allow the aircraft to slow while maintaining level flight, the aircraft will stall at 50Kt. He then turns round and says that the elevator is not able to keep the nose up at a speed below 60Kt.......so how does he get to 50Kt in the first place??????
I realise that you are a student and of course you will in time be given a briefing on stalling whic as you so correctly point out is related to angle of attack. However, don't mix up attitude and angle of attack!
Regards,
DFC