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Transall Steep Approach - Propeller Settings?

mozart From Luxembourg, joined Aug 2003, 2007 posts, RR: 14
Posted (1 year 11 months 3 weeks 4 days 5 hours ago) and read 2417 times:

I read somewhere that the C160 Transall planes can do very steep approaches. Apparently they manage to do that because of some technique/procedure with the propellers.

What is behind that?

Thanks

4 replies: All unread, jump to last

tdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 81
Reply 1, posted (1 year 11 months 3 weeks 3 days 16 hours ago) and read 2295 times:

Quoting mozart (Thread starter):
I read somewhere that the C160 Transall planes can do very steep approaches. Apparently they manage to do that because of some technique/procedure with the propellers.

What is behind that?

I don't know the answer, but if they've got the ability to put the propellers in beta (reverse pitch) in flight, that would do it. You'd be losing energy really quickly without having to have a really bizarre attitude. It's analogous to some of the old turbojets that could deploy thrust reversers in flight to expedite the descent.

Tom.

TheSonntag From Germany, joined Jun 2005, 3347 posts, RR: 30
Reply 2, posted (1 year 11 months 3 weeks 3 days 14 hours ago) and read 2268 times:

My grandfather was a Transall pilot untill 1982. He told me that Transall can do steep approaches no Herc could ever do. As far as I remember, they also have some special speed brakes.

I will have to try to ask him, but he is 84 years old, so I am not sure whether he remembers.

Try to google after Sarajevo approach.

Pihero From France, joined Jan 2005, 3496 posts, RR: 72
Reply 3, posted (1 year 11 months 3 weeks 3 days 12 hours ago) and read 2232 times:

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Quoting tdscanuck (Reply 1):
if they've got the ability to put the propellers in beta (reverse pitch) in flight, that would do it. You'd be losing energy really quickly without having to have a really bizarre attitude.

Full flaps, props in beta range and speedbrakes deployed = 4000 ft/min
Attitude -12 to -15 °.
Bloody impressive.
See here at Orleans an approche grande pente

Approche sous grande pente = tactical approach = high angle of approach.

[Edited 2011-06-01 02:55:35]

Contrail designer

SAAFNAV From South Africa, joined Mar 2010, 204 posts, RR: 0
Reply 4, posted (1 year 11 months 3 weeks 2 days 8 hours ago) and read 2065 times:

I've never seen it, but I spoke with some Nav Instructors that flew them.
During the South African Bush War, they would be escorted by Aermacchi Impalas at cruising level, then race down to land.
By the time the C-160 vacated the runway, the Impalas would turn base.

The Nav was just instructed to strap tight and put away the divider.

Erich

On-board Direction Consultant

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