Warbird Information Exchange

DISCLAIMER: The views expressed on this site are the responsibility of the poster and do not reflect the views of the management.
It is currently Thu Mar 28, 2024 7:26 am

All times are UTC - 5 hours


Classic Wings Magazine WWII Naval Aviation Research Pacific Luftwaffe Resource Center
When Hollywood Ruled The Skies - Volumes 1 through 4 by Bruce Oriss


Post new topic Reply to topic  [ 9 posts ] 
Author Message
PostPosted: Thu Jan 28, 2016 5:11 am 
Offline

Joined: Sun Mar 24, 2013 5:10 pm
Posts: 27
Location: Germany
Hey Guys,
we are nearing completion on our T6-G Project. During one of the System Tests the question arose whether to wire the starter as direct cranking or as inertia starter.
I know that the T-6 started out with the inertia type and that the wiring on the T-6G was later modified to be used as direct cranking.

Any risks or benefits on both type of configuration?

Thanks

Stefan

_________________
immer den Knueppel ruhig halten!


Top
 Profile  
 
PostPosted: Sat Jan 30, 2016 9:18 am 
Offline

Joined: Mon Feb 05, 2007 8:05 am
Posts: 59
Location: Fort Worth, TX
I like the inertia starter quite a bit. That being said, when it came time to OH the engine on the T-6 I couldn't find anyone to OH the inertia starter as such... so it is direct now and works fine.

gunny

_________________
Scott 'Gunny' Perdue
http://www.eagleflyingmuseum.org


Top
 Profile  
 
PostPosted: Sat Jan 30, 2016 3:51 pm 
Offline

Joined: Sun Mar 24, 2013 5:10 pm
Posts: 27
Location: Germany
Thanks Gunny,
are there any Problems with the clutch engaging the engine at a higher Speed when it comes to Service life?

_________________
immer den Knueppel ruhig halten!


Top
 Profile  
 
PostPosted: Sat Jan 30, 2016 4:32 pm 
Offline
User avatar

Joined: Mon Jun 18, 2007 9:52 pm
Posts: 72
Location: Hong Kong
Hello DELEQ,
My quick 2 cents worth.

Direct drive starters are lighter meaning less weight needed in the tail for weight and balance CG and higher useful load.

If, and I hope it never happens, you ever get an induction fire from say a flooded carb. You need to keep cranking the engine over to suck up all the flames !
You do not want to wait for an inertia starter to spool up again to keep the engine cranking. Your engine accessory section will be up in flames by that time.

You need the ability to keep cranking that engine over until all the flames have disappeared or the engine has started.

With proper priming and the proper starting procedure this should never happen. But as they say, never say never!

Vincent


Top
 Profile  
 
PostPosted: Sat Jan 30, 2016 4:56 pm 
Offline

Joined: Sun Mar 24, 2013 5:10 pm
Posts: 27
Location: Germany
Hi Vincent,
the induction fire is definitly a good Point. It seems that our starter works as both types, it´s just a matter how you wire the starter Switch. You just have to leave away the engage wire, and it just spools up the starter.

Stefan

_________________
immer den Knueppel ruhig halten!


Top
 Profile  
 
PostPosted: Mon Feb 01, 2016 7:28 am 
Offline

Joined: Mon Feb 05, 2007 8:05 am
Posts: 59
Location: Fort Worth, TX
DELEQ wrote:
Thanks Gunny,
are there any Problems with the clutch engaging the engine at a higher Speed when it comes to Service life?


I don't think so. The duty cycle of these starters was orders of magnitude greater in WWII than what we put them through today.

gunny

_________________
Scott 'Gunny' Perdue
http://www.eagleflyingmuseum.org


Top
 Profile  
 
PostPosted: Mon Feb 01, 2016 12:22 pm 
Offline
Been here a long time
Been here a long time

Joined: Sun May 02, 2004 1:16 am
Posts: 11276
I set the 3-position switch up on my Stearman starter to energize the flywheel in the first detent and then the third to engage. The middle position was off and the other positions were springloaded to the center. The engagement detent was also wired to continue powering the flywheel electrically while cranking. That method extended the length of time that the engine would crank over if it hadn't already started.

Seemed to work well.


Top
 Profile  
 
PostPosted: Tue Feb 02, 2016 7:28 am 
Offline

Joined: Sun Mar 24, 2013 5:10 pm
Posts: 27
Location: Germany
That´s exactly how we have wired it now. In the T-6G Manual is a wiring Diagramm that shows to wire both Position the same, for direct cranking only. But i guess we leave it like it is, to give us at least the Option to use the inertia starting.

_________________
immer den Knueppel ruhig halten!


Top
 Profile  
 
PostPosted: Wed Feb 03, 2016 6:49 pm 
Offline
Been here a long time
Been here a long time

Joined: Sun May 02, 2004 1:16 am
Posts: 11276
The wind up of the inertia starter gives spectators some anticipation at least.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group