Maximum substantiated pressure-altitude
Thread Starter
Joined: Apr 2007
Posts: 13
Likes: 0
From: italy
Maximum substantiated pressure-altitude
Hi to all,
in the AS350B3 Flight manual,
2.1 OPERATING LIMITATION,
7 APPROVED FLIGHT ENVELOPE
7.1 ALTITUDE
you can find: Maximum substantiated pressure-altitude: 23000 ft (7010 m).
what does substantiated pressure-altitude mean?
I can't find any definition for this term, any help?
Tks
Pigi
in the AS350B3 Flight manual,
2.1 OPERATING LIMITATION,
7 APPROVED FLIGHT ENVELOPE
7.1 ALTITUDE
you can find: Maximum substantiated pressure-altitude: 23000 ft (7010 m).
what does substantiated pressure-altitude mean?
I can't find any definition for this term, any help?
Tks
Pigi
Joined: Dec 2001
Posts: 1,835
Likes: 3
From: Philadelphia PA
At first glance this appears to be something similar to
"Maximum demonstrated crosswind component" or 'Maximum demonstrated sideward flight (i.e. sidewind)' - it says that's the maximum it's been demonstrated to, but not a limit.
Given that a variant of the AS350 has landed on Mt. Everest, it's clear that the aerodynamics are capable of more than 23,000' PA.
"Maximum demonstrated crosswind component" or 'Maximum demonstrated sideward flight (i.e. sidewind)' - it says that's the maximum it's been demonstrated to, but not a limit.
Given that a variant of the AS350 has landed on Mt. Everest, it's clear that the aerodynamics are capable of more than 23,000' PA.
Joined: Dec 2008
Posts: 2,191
Likes: 26
From: Top of the World
Top of the World - yikes we are high
no mention of 'substantiated' in my RFM????
remember though; that ALL companies have plucked this figure deep from within their anal cavity. They really have no idea as they never tried, tested & proven....classic example the B47 service ceiling 20,000'PA hahahaha will never get there in a naturally aspirated engine
remember though; that ALL companies have plucked this figure deep from within their anal cavity. They really have no idea as they never tried, tested & proven....classic example the B47 service ceiling 20,000'PA hahahaha will never get there in a naturally aspirated engine
Thread Starter
Joined: Apr 2007
Posts: 13
Likes: 0
From: italy
Tks a lot,
I wanted only understand if am I allowed to fly above this Maximum substantiated pressure-altitude or not. That's my question. Pigi
PS: Ciao VF
I wanted only understand if am I allowed to fly above this Maximum substantiated pressure-altitude or not. That's my question. Pigi
PS: Ciao VF
Last edited by pigi; 29th March 2013 at 16:10.
Joined: Oct 2010
Posts: 74
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From: India
Two possibilities:-
1. The term 'substantiated' may have been introduced to refer to pressure altitude in ISA conditions.
2. Some parts of flight testing may still be pending owing to 'Limitations of the test criteria'....(unlikely though).
Any how the most satisfactory answer can only be given by the OEM.
1. The term 'substantiated' may have been introduced to refer to pressure altitude in ISA conditions.
2. Some parts of flight testing may still be pending owing to 'Limitations of the test criteria'....(unlikely though).
Any how the most satisfactory answer can only be given by the OEM.
Joined: May 2000
Posts: 297
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From: Phuket
My .02...1. substantiated To support with proof or evidence; verify: substantiate an accusation. See Synonyms at confirm.
2.
a. To give material form to; embody.
b. To make firm or solid.
3. To give substance to; make real or actual.
Which means someone actually did this and with their experience/abilities with that aircraft on that given day this was the culmination of pilot ability and aircraft performance. Much like Shawn said. I am reasonably sure if VF was asked to submit a "substantiated" example it will be a bit higher. Just my opinion anyway.
2.
a. To give material form to; embody.
b. To make firm or solid.
3. To give substance to; make real or actual.
Which means someone actually did this and with their experience/abilities with that aircraft on that given day this was the culmination of pilot ability and aircraft performance. Much like Shawn said. I am reasonably sure if VF was asked to submit a "substantiated" example it will be a bit higher. Just my opinion anyway.
Last edited by before landing check list; 31st March 2013 at 01:22.
