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Different Take Off Weight Limit  
User currently offlineHarryStanhope From Australia, joined May 2012, 21 posts, RR: 0
Posted (3 years 4 months 2 weeks 5 days 5 hours ago) and read 2768 times:

I am going to get my endorsement on an Aerocommander AC500S shortly and I noticed in the flight manual it gives a different max take off weight for IFR.

The MTOW is less for IFR than VFR, why would it be less?

The only thing I can think of is to do with penetration speeds but wouldn't it be better to be heavier and have a higher speed?


2 replies: All unread, jump to last
User currently offlineCaptCufflinks From UK - England, joined Dec 2012, 96 posts, RR: 0
Reply 1, posted (3 years 4 months 2 weeks 2 days 13 hours ago) and read 2550 times:

I don't know enough about the type to make an authoritative statement, but the first thing that came to mind was simply maneuvering speeds and rate of climb.

Instrument departures under IFR can have climb performance requirements associated with them, perhaps at the VFR MTOW, climb performance is degraded to a point that is unsuitable.

I'm not sure I follow your point about penetration speeds. Rough air is penetrated under VFR too?

User currently offlinezeke From Hong Kong, joined Dec 2006, 10843 posts, RR: 76
Reply 2, posted (3 years 4 months 2 weeks 2 days 11 hours ago) and read 2512 times:

Quoting HarryStanhope (Thread starter):

Sounds like CAO 20.7.4 paragraph 8 requirement.

8.1 Multi-engined aeroplanes engaged in charter operations under the Instrument Flight Rules or aerial work operations under the Instrument Flight Rules must have the ability to climb with a critical engine inoperative at a gradient of 1% at all heights up to 5 000 feet in the standard atmosphere in the following configuration:

We are addicted to our thoughts. We cannot change anything if we cannot change our thinking – Santosh Kalwar
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