Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

SD-20 Alt performance chart?

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
aadamson(at)highrf.com
Guest





PostPosted: Fri Feb 24, 2006 7:56 am    Post subject: SD-20 Alt performance chart? Reply with quote

Bob, did you ever put together one of these for the SD-20? B&C specify 20A
output at 3500rpm, so I would assume that you could use the same "ratios"
and determine that on a continental for example, that is a 1.15:1, that
you'd have full output at 2900ish rpm?

http://www.aeroelectric.com/Reference_Docs/Alternator_Data/SD8-Performance.p
df


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
nuckollsr(at)cox.net
Guest





PostPosted: Fri Feb 24, 2006 9:06 am    Post subject: SD-20 Alt performance chart? Reply with quote

At 10:51 AM 2/24/2006 -0500, you wrote:

Quote:

<aadamson(at)highrf.com>

Bob, did you ever put together one of these for the SD-20? B&C specify 20A
output at 3500rpm, so I would assume that you could use the same "ratios"
and determine that on a continental for example, that is a 1.15:1, that
you'd have full output at 2900ish rpm?

http://www.aeroelectric.com/Reference_Docs/Alternator_Data/SD8-Performance.p
df

The SD-20 is an L-40 with different shoes. It's limited in output
only because of the reduced speed on the vacuum pump pad. It's
performance is described on B&C's website at:

http://bandc.biz/SD20REVC.pdf

Bob . . .


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
aadamson(at)highrf.com
Guest





PostPosted: Fri Feb 24, 2006 9:35 am    Post subject: SD-20 Alt performance chart? Reply with quote

Cuz the ignorance, but what ALT rpm would I expect to see on a continental
io-550 vacuum pad, when the engine is turning 2500 RPM?

Alan

--


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
BobsV35B(at)aol.com
Guest





PostPosted: Fri Feb 24, 2006 12:48 pm    Post subject: SD-20 Alt performance chart? Reply with quote

In a message dated 2/24/2006 11:37:58 A.M. Central Standard Time,
aadamson(at)highrf.com writes:

Cuz the ignorance, but what ALT rpm would I expect to see on a continental
io-550 vacuum pad, when the engine is turning 2500 RPM?

Alan

7500

Happy Skies,

Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Air Park LL22
Downers Grove, IL 60516
630 985-8503


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
aadamson(at)highrf.com
Guest





PostPosted: Fri Feb 24, 2006 1:34 pm    Post subject: SD-20 Alt performance chart? Reply with quote

Bob, does that make sense. 7500 would give almost 40amps out of the SD-20,
is a continental really 3:1 on the vacuum pad? Engine rpm 2500, vacuum pad
7500?

Alan

--


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
BobsV35B(at)aol.com
Guest





PostPosted: Fri Feb 24, 2006 8:32 pm    Post subject: SD-20 Alt performance chart? Reply with quote

Good Evening Alan,

I had my head up and locked when I responded. The regular alternator drive
on most 520 or 550 Continentals spins the alternator at three times crankshaft
speed. That is what I had in mind. The accessory drive that often runs the
vacuum pump will spin at one and a half times crankshaft speed on all six
cylinder Continentals.

Sorry, I goofed!

Happy Skies,

Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Air Park LL22
Downers Grove, IL 60516
630 985-8503

In a message dated 2/24/2006 6:58:53 P.M. Central Standard Time,
aadamson(at)highrf.com writes:


<aadamson(at)highrf.com>

Bob, does that make sense. 7500 would give almost 40 amps out of the SD-20,
is a continental really 3:1 on the vacuum pad? Engine rpm 2500, vacuum pad
7500?

Alan


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
aadamson(at)highrf.com
Guest





PostPosted: Fri Feb 24, 2006 8:47 pm    Post subject: SD-20 Alt performance chart? Reply with quote

It's ok, I did too.... Smile... I think we have it straight now tho...

Nite all,
Alan

--


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
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 vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group