Matronics Email Lists :: View topic - mixture cable flexing

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

mixture cable flexing

Matronics Email Lists Forum Index -> RV-List

View previous topic :: View next topic

Author Message

Erich_Weaver(at)URSCorp.c
Guest

Posted: Tue May 30, 2006 11:20 am Post subject: mixture cable flexing

I have an  io-360 with the AFP fuel controller mounted below the sump

(vertical induction).  AFP supplies nice, heavy duty brackets with the fuel

controller for mounting the mixture and throttle cables.  However, with the

mixture cable in particular, the distance between the firewall pass-through

point and the point where the cable attaches to the bracket  is very short

- maybe 4 inches.  This short distance  doesnt allow any room for curving

the cable and allowing it to flex during engine shaking etc, especially

since the eyeball socket at the firewall cable does not allow the cable to

slip in and out at all.  Do folks generally build-in a little flex in the

mixture and throttle cables forward of the firewall, or is it pretty much a

straight shot from the firewall to the rod-end bearing?    Dont I have a

legitimate concern with respect to the need for cable flexing?



thanks for any insights



Erich Weaver

- The Matronics RV-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?RV-List

sarg314(at)comcast.net
Guest

Posted: Tue May 30, 2006 3:26 pm Post subject: mixture cable flexing

Erich:

    I am not flying yet, but I was also uncomfortable with that short 

run.  All connections between the firewall and the engine should have 

plenty of slack in them.  Another local builder whose 6A has been flying 

for a long time now advised me to penetrate the firewall well above - 

about 12" above - the fuel controller  and have the cable do a graceful 

"S" down to the attach bracket.  That is what I did for both throttle 

and mixture.  You can have too little slack, but too much is not a 

problem, so err on the side of too much. 



BTW, mine is a vert. induction, so this may not be an issue for you, 

but  I found the AFP-supplied cable mounting brackets to be unusable on 

a 6A and made my own which were essentially the mirror image of the AFP 

brackets.  There just isn't room to get the standard brackets to fit 

around the engine mount tubes on a 6A without hacking away more of the 

bracket than I was comfortable with.  This allowed me to maintain a good 

separation (about 1/2" as I recall) between the brackets and the engine 

mount tubes.



Also, I had very good experience dealing with Cablecraft.  They're 

expensive, but their cables have a shorter bend radius spec than the 

cheaper ones from Spruce.  They also claim to have a  gradual failure 

mode.  I had some shipping damage on my first shipment and they made 

good on it, no questions asked, no fooling around with UPS claims, so 

their customer service was excellent.

Erich_Weaver(at)URSCorp.com wrote:



 	  Quote: 	
		  

However, with the

mixture cable in particular, the distance between the firewall pass-through

point and the point where the cable attaches to the bracket  is very short

- maybe 4 inches.  This short distance  doesnt allow any room for curving

the cable and allowing it to flex during engine shaking etc, especially

since the eyeball socket at the firewall cable does not allow the cable to

slip in and out at all.

- The Matronics RV-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?RV-List

Display posts from previous:

	Matronics Email Lists Forum Index -> RV-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