aero654
Topic Author
Posts: 1
Joined: Tue Sep 09, 2014 8:16 am

ATR PW127 engine starter generator

Wed Jan 03, 2018 8:44 am

Hello everyone,

Is there someone out there who can give me an idea where I can find an approved technical data for the starter/generator installed on an ATR 42/72 -500 PW127 series engine

I would like to know how much continuous current that the ATR PW 127 engine starter/generator is drawing during starting. The reason behind is I am looking for possibilities to use a series-parallel automobile battery as DC GPU for ATR 42/72 aircraft that can be used for starting.

Thanks and regards

Aero654
 
WIederling
Posts: 5445
Joined: Sun Sep 13, 2015 2:15 pm

Re: ATR PW127 engine starter generator

Wed Jan 03, 2018 9:10 am

Look at the onboard battery capabilities?
i.e. what is installed?
Murphy is an optimist
 
VSMUT
Posts: 1525
Joined: Mon Aug 08, 2016 11:40 am

Re: ATR PW127 engine starter generator

Wed Jan 03, 2018 12:24 pm

FCOM 2.02.05 page 1, Use of a weak DC GPU:
"...a steady current of 300 - 400 amp under 28 volts to insure correct functioning of all electrical services prior to startup.
For engine start, the GPU must be able to provide additional starter current of 1000 Amp while keeping more than 12 volts (ie 16 KW instantaneous power)."
 
WIederling
Posts: 5445
Joined: Sun Sep 13, 2015 2:15 pm

Re: ATR PW127 engine starter generator

Wed Jan 03, 2018 2:43 pm

VSMUT wrote:
FCOM 2.02.05 page 1, Use of a weak DC GPU:
"...a steady current of 300 - 400 amp under 28 volts to insure correct functioning of all electrical services prior to startup.
For engine start, the GPU must be able to provide additional starter current of 1000 Amp while keeping more than 12 volts (ie 16 KW instantaneous power)."


what duration?

using automotive batteries ( 2 * 12V in series ) you'll never get 28V. Best you will see is 25V under load.

starting is easier. Look for the CA/@0°C ( or CCA/@-15°C) value ~1400A ( allows 30s load with voltage per 12V unit not below 7.5V )
1400A is what a regular 180Ah battery will provide as CCA current. If you are doing a dedicated purchase you may look into traction cells to get to 28V
Murphy is an optimist
 
VSMUT
Posts: 1525
Joined: Mon Aug 08, 2016 11:40 am

Re: ATR PW127 engine starter generator

Wed Jan 03, 2018 9:37 pm

WIederling wrote:
VSMUT wrote:
FCOM 2.02.05 page 1, Use of a weak DC GPU:
"...a steady current of 300 - 400 amp under 28 volts to insure correct functioning of all electrical services prior to startup.
For engine start, the GPU must be able to provide additional starter current of 1000 Amp while keeping more than 12 volts (ie 16 KW instantaneous power)."


what duration?


Pretty sure it was 30 seconds, but I will have to check.

Who is online

Users browsing this forum: B6JFKH81, citrusrsw, JustSomeDood, Starlionblue and 19 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos