28 Nov 2025, 22:15 [ UTC - 5; DST ]
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Post subject: Re: L39  Posted: 06 Aug 2017, 15:01 |
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Joined: 05/02/15
Posts: 1010
Post Likes: +741
Location: Austin, Texas and Argentina
Aircraft: L-39 Albatros
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Username Protected wrote: Although the TFE371-3 conversions get rid of the RAT, I really don't understand why most owners keep the RAT with the Ivchenko engine, since all the jets I've flown have modern American batteries. Isn't that for engine start? With the standard l39 motor?
Maybe you're thinking of the Sapphire APU for engine starts. The RAT (Ram Air Turbine) is an emergency electrical generator that drops down from the fuselage into the airstream.
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Username Protected
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Post subject: Re: L39 Posted: 07 Aug 2017, 18:30 |
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Joined: 01/03/15
Posts: 121
Post Likes: +137
Aircraft: King Air
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No, I'm referring to the RAT. It's unnecessary in the various aircraft I'm flying.
Everyone I know flies VFR at or below 17,500, and every abnormal scenario we discuss has the aircraft landing well before our Concorde battery is getting low. That doesn't even account for turning off some of the inverters to reduce the electrical demand.
If folks are flying up in the high flight levels, maybe a different story. But we don't go there.
And for an engine out scenario, I'd rather keep the RAT in and not sacrifice glide range. I won't run out of electrical power in the 17 minutes it takes me to get down from 17,500.
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