VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


  #1  
Old 12-07-2007, 10:47 AM
trib trib is offline
 
Join Date: Aug 2005
Location: Virginia Beach, VA
Posts: 446
Question Starter solenoid question

On the starter solenoid, there are two switch terminals, one labeled "S" and the other labeled "I". This is the part from Van's. I'm assuming the "S" is for the starter switch. What is the purpose of the "I" terminal? Something to do with an ignition?
__________________
Tim Ribble
Virginia Beach
RV-6A (only took 13 years to build )
N621TR In unrestricted operation
Reply With Quote
  #2  
Old 12-07-2007, 11:25 AM
Rick_A's Avatar
Rick_A Rick_A is offline
 
Join Date: Oct 2005
Location: Highland Village, TX
Posts: 1,070
Default Starter Contactor

This image is from the B&C website. The wiring for the Vans contactor would be the same:

http://img510.imageshack.us/my.php?i...ntactorrz5.jpg
__________________
Rick Aronow,
A&P
Completed 7A Slider;
RV-12 Empennage, Wings & Fuselage done. Working on Finish Kit

Highland Village,TX
Reply With Quote
  #3  
Old 12-07-2007, 11:27 AM
Radomir's Avatar
Radomir Radomir is offline
 
Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,483
Default

You can connect this terminal to the small terminal on the starter.... I believe Van's instructions have you do that for PM starters...
__________________
Radomir
RV-7A sold
Reply With Quote
  #4  
Old 12-08-2007, 06:21 AM
trib trib is offline
 
Join Date: Aug 2005
Location: Virginia Beach, VA
Posts: 446
Default

Thanks Radomir and Rick. A picture IS worth a thousand words! By the way Radomir, from your earlier question, I threw away that rubber cover on the tach drive after using it as a paint mask when painting. I haven't gotten the cover yet but plan on getting one. Thanks for looking out for me!
__________________
Tim Ribble
Virginia Beach
RV-6A (only took 13 years to build )
N621TR In unrestricted operation
Reply With Quote
  #5  
Old 12-08-2007, 03:35 PM
gmcjetpilot's Avatar
gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 3,629
Default Yep you are right, "I" = ignore

Quote:
Originally Posted by trib View Post
On the starter solenoid, there are two switch terminals, one labeled "S" and the other labeled "I". This is the part from Van's. I'm assuming the "S" is for the starter switch. What is the purpose of the "I" terminal? Something to do with an ignition?
Yep "S" (for starter) gets momentary switched 12 volt power. A good approx wire size is about 18 awg and is fused with a 7 amp CB or fuse.

"I" is ignition and has to do with cars and coil point ignitions (** if you want to know why).

"I" terminal is powered with 12 volts when the normally open contactor closes. When you release the starter button the contactor opens and power is removed from the starter and the "I" terminal.

You could connect "I" to a panel start light if you wanted to, but 99.99% ignore it. I'd cut it off the threaded stud and save 2 grams. (*** Don't get confused, this is NOT a run-on starter light.)

Make it look like this:



** What is "I" really for? Typical point-coil ignitions have a big resistor to lower the voltage to the coil, prolong point life. However during start, full avaiable electrical power goes through the "I" terminal to the coil. This assists starting, bypassing the resistor. Since voltage is down already due to the draw of the starter during cranking, the resistor is not desirable during start. Pretty common stuff in 1960's and 70's cars. Often this wire gets disconnected or broken and cars whould be hard to start. Common fix or check is check coil voltage during cranking. Often the engine would "catch" just as you let go of the starter. I had some old Chevy's.

*** Starter Run ON: Having a firewall contactor (solenoid) eliminates this worry or at least minimize it in theory. The worry is if the starter remains engaged to the flywheel the starter acts as a generator, causing electrical havoc. If you want a run on light, put it on the starter, not the firewall contactor. Not many put a run on light in their RV. Skytec has a run on light KIT. It's just 20 bucks in wire, fuse holder, fuse, a few wire terminals, lamp and lamp holder. The firewall contactor should provide protection from run-on, but skytec claims that poor quality firewall contactors (made by White Rogers) or improper type contactors (continuous duty used, should be intermittent duty) where used on Pipers and Cessna's, which caused run-on problems. Here is their explanation. It's not an issue with the contactor Van's sells (Intermittent duty made by colehersee). It's the right one. Run-on caused by our firewall contactor is a nil concern in my opinion. I don't see how our firewall contactor could fail or weld closed. Remove power from the coil, it opens. Most of the STUCK starter run-on stuff involve the solenoid ON the starter, so put the run-on light there, if you desire. Personally I did not bother. (Diagram)
__________________
George
Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767

Last edited by gmcjetpilot : 12-08-2007 at 04:55 PM.
Reply With Quote
  #6  
Old 06-07-2009, 12:42 PM
IowaRV9Dreamer's Avatar
IowaRV9Dreamer IowaRV9Dreamer is offline
 
Join Date: Jan 2005
Location: Cedar Rapids IA
Posts: 989
Default Who makes Vans Starter Solenoid?

Does anybody have a reference for the manufacturer of Vans Starter Solenoid? (aka Starter Contactor)

The Battery Solenoid is made by Cole Hersee, part number 24115. BTW it is a continuous duty part, rated to make or break 85A. In a related question, does anybody know what the typical and max coil current is for the Battery Solenoid?

I think the Starter Solenoid may be like a Cole Hersee 24021, since it seems to have a coil that ties to the ground on the bracket and it has the "I" terminal which they call a "resistor shorting circuit". That part is rated to make 750A, and break 100A. Does anyone know what the typical and max coil currents are for this one?

The Starter Solenoid I got from Vans is marked with 12V, 5573, 8CA, and Made in USA. The two smaller terminals are marked "I" and "S" but there are no other markings.

Thanks for any info,

dave
__________________
Dave Gribble VAF #232
Building RV-9A N149DG (slider, O-320-E2A, IFR)
Restored and Flying Beech Super III N3698Q
Cedar Rapids IA

Ready for an engine!

There is no sport equal to that which aviators enjoy while being carried through the air on great white wings." Wilbur Wright, 1905

Last edited by IowaRV9Dreamer : 06-07-2009 at 12:55 PM. Reason: added marking info
Reply With Quote
  #7  
Old 06-07-2009, 06:04 PM
dpansier's Avatar
dpansier dpansier is offline
 
Join Date: Jan 2006
Location: Green Bay, WI (GRB)
Posts: 309
Default

See the following thread, has info on starter solenoids.

http://www.vansairforce.com/communit...ad.php?t=15801
__________________
D. Pansier
Green Bay, WI (GRB)
RV-7 Finish Kit
VAF #586
W9LYX

Antennas for Experimental Aircraft
www.deltapopaviation.com
Reply With Quote
  #8  
Old 06-07-2009, 10:39 PM
IowaRV9Dreamer's Avatar
IowaRV9Dreamer IowaRV9Dreamer is offline
 
Join Date: Jan 2005
Location: Cedar Rapids IA
Posts: 989
Default

Thanks D. I had seen that thread and it has some good info. What I'm looking for is the manufacturer / part number / datasheet on the Vans starter solenoid. I'm trying to have that data on every component in my airplane.

I plan to measure the solenoid current... I'm sure it will be near the 3.5A reported in the thread above.

Thanks again,
__________________
Dave Gribble VAF #232
Building RV-9A N149DG (slider, O-320-E2A, IFR)
Restored and Flying Beech Super III N3698Q
Cedar Rapids IA

Ready for an engine!

There is no sport equal to that which aviators enjoy while being carried through the air on great white wings." Wilbur Wright, 1905
Reply With Quote
  #9  
Old 06-09-2009, 09:03 PM
Jeff A's Avatar
Jeff A Jeff A is offline
 
Join Date: Feb 2007
Location: Lewisville, TX
Posts: 277
Default Would like the same info.

My search for the same info led me to this thread. If anyone knows what the Cole-Hersee PN is and where to find a spec sheet, I'd love to have the info.
__________________
Jeff Atkinson
RV-8 #82594 Flying since May 2012
Barrett XP-360, Catto 3-Blade, Dynon Skyview, VP-X
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:01 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.