mozart
Topic Author
Posts: 2054
Joined: Thu Aug 14, 2003 12:21 am

Transall Steep Approach - Propeller Settings?

Tue May 31, 2011 5:05 pm

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
 
tdscanuck
Posts: 8572
Joined: Wed Jan 11, 2006 7:25 am

RE: Transall Steep Approach - Propeller Settings?

Wed Jun 01, 2011 5:25 am

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
Posts: 4351
Joined: Wed Jun 15, 2005 7:23 pm

RE: Transall Steep Approach - Propeller Settings?

Wed Jun 01, 2011 7:31 am

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
Posts: 4248
Joined: Mon Jan 31, 2005 5:11 am

RE: Transall Steep Approach - Propeller Settings?

Wed Jun 01, 2011 9:47 am

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
Posts: 391
Joined: Wed Mar 17, 2010 5:41 pm

RE: Transall Steep Approach - Propeller Settings?

Thu Jun 02, 2011 1:24 pm

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
L-382 Loadmaster; ex C-130B Navigator

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