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Throttle Cable length - short

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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Thu Apr 09, 2009 1:43 am Post subject: Throttle Cable length - short

Using a standard Van's panel mounted throttle (no quadrant), it fits very tight in the engine compartment. I can install it and get the threads inserted properly, but it will definitely rub and chafe on the bottom of the engine case. Anyone else had this same issue. It could definitely use an extra 3/4 of an inch in length. The prop & mixture were fine

_________________
See you OSH '18
Q/B - sold.

jkreidler

Joined: 13 Feb 2008
Posts: 151
Location: Sheboygan Falls WI

Posted: Thu Apr 09, 2009 4:05 am Post subject: Throttle Cable length - short

We had the same problem, we ordered the cable called for on the RV-7, and it worked perfect. 

 

I think by trying to use the shorter cable it forces the throttle arm to a more horizontal position while at idle.  This make the throttle more difficult to advance at low power settings, almost like you need to push on the throttle hard enough to get the arm to go over center.  Ideally the angle between the cable and the throttle arm while the throttle cable is advanced half way is 90 degrees.  Making the angle of the cable to the throttle arm at idle approximately 135 degrees, and at wide open throttle approximately 45 degrees.  I think the standard cable forces the angle while at idle to be something like 160 degrees, which is the cause of the 'over center' feeling.  I am not suggesting that it will ever approach an over center condition, just that it fells like it is approaching an over center condition.  The aircraft we took transition training in had a throttle that was harder to advance for the first one third of travel.  Not a big deal, just the sort of perfection we all strive for. 

 

BTW, Vans indicated "They have never had this come up before on the RV-10".  I posted this question to the list a while back, and found one or two others with the same problem.  Anyone need a standard length RV-10 throttle cable? 



 Thanks, Jason Kreidler

  

It runs, weight and balance complete, transition training done, doing minor finishing and calibrations, waiting on paperwork. 

 

#40617 N44YH 

Sheboygan Falls, WI

 (4) Partner Build 

Jason Kreidler 

Kyle Hokel 

Tony Kolar 

Wayne Elsner [quote][b]

_________________
Jason Kreidler
4 Partner Build - Sheboygan Falls, WI
Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler
N44YH - Flying - #40617

dlm46007(at)cox.net
Guest

Posted: Thu Apr 09, 2009 4:30 am Post subject: Throttle Cable length - short

I installed the quadrant and found the mixture and throttle  cables tight, They easily could have used another inch. I did cut a section of  flexible tubing/high temp spiral wrap over the cables where they might have  chaffed.

   From: owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of  jason.kreidler(at)regalbeloit.com

Sent: Thursday, April 09, 2009 5:01  AM

To: rv10-list(at)matronics.com

Subject: Re:  Throttle Cable length - short

We had the same problem, we ordered  the cable called for on the RV-7, and it worked perfect. 

I think by trying to use the shorter cable it forces the  throttle arm to a more horizontal position while at idle.  This make the  throttle more difficult to advance at low power settings, almost like you need  to push on the throttle hard enough to get the arm to go over center.   Ideally the angle between the cable and the throttle arm while the  throttle cable is advanced half way is 90 degrees.  Making the angle of the  cable to the throttle arm at idle approximately 135 degrees, and at wide open  throttle approximately 45 degrees.  I think the standard cable forces the  angle while at idle to be something like 160 degrees, which is the cause of the  'over center' feeling.  I am not suggesting that it will ever approach an  over center condition, just that it fells like it is approaching an over center  condition.  The aircraft we took transition training in had a throttle that  was harder to advance for the first one third of travel.  Not a big deal,  just the sort of perfection we all strive for. 

BTW, Vans indicated "They have never had this come up  before on the RV-10".  I posted this question to the list a while back, and  found one or two others with the same problem.  Anyone need a standard  length RV-10 throttle cable? 

Thanks,  Jason Kreidler

It runs, weight and  balance complete, transition training done, doing minor finishing and  calibrations, waiting on paperwork. 

#40617 N44YH 

Sheboygan Falls,  WI

(4) Partner Build 

Jason  Kreidler 

Kyle Hokel 

Tony Kolar 

Wayne  Elsner [quote]

href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

planesmith(at)hotmail.com
Guest

Posted: Thu Apr 09, 2009 6:26 am Post subject: Throttle Cable length - short

Hi Mike C

  

 I had the same problem. Ended up reclocking the throttle arm (for best travel/leverage) and installing a cushion clamp C to hold the cable C  in a spare threaded mounting hole in the bottom rear of the oil sump (these are coarse threads.)

  

 The hard one for me has been the mixture control.

  

 Vern Smith (finishing #324)

   

[quote] Subject: Throttle Cable length - short

 From: Mikeabel(at)Pacbell.net

 Date: Thu C 9 Apr 2009 02:43:39 -0700

 To: rv10-list(at)matronics.com

 

 --> RV10-List message posted by: "AirMike" <Mikeabel(at)Pacbell.net>

 

 Using a standard Van's panel mounted throttle (no quadrant) C it fits very tight in the engine compartment. I can install it and get the threads inserted properly C but it will definitely rub and chafe on the bottom of the engine case. Anyone else had this same issue. It could definitely use an extra 3/4 of an inch in length. The prop & mixture were fine

 

 --------

 OSH '08 or Bust (busted) be there in &quot;09

 Q/B Kit - FWF end game

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=238451#238451

 

 

 

 

 

 &g============

 

 

 

Rediscover Hotmail®: Now available on your iPhone or BlackBerry Check it out.   	  Quote: 	
		  [b]

AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Thu Oct 18, 2012 5:04 am Post subject: Throttle Cable length - short

Sure enough, my Vans OEM 47.5" throttle cable has chaffed through the metal shroud. This, discovered during my annual condition inspection. The Vans web site still shows the, too short 47.5" cable as the suggestion for the RV10, but it is obvious that this is a poor choice. It chaffed through on the bottom of the engine oil case. The suggested replacement on prior blogs is to get the RV7 cable as a replacement which is 50.5" long. Any other suggestions appreciated.

_________________
See you OSH '18
Q/B - sold.

carl.froehlich(at)verizon
Guest

Posted: Thu Oct 18, 2012 5:29 am Post subject: Throttle Cable length - short

I got the next longer cable listed on the Van's web site and it works fine.  I don't remember if it was the RV-7 one or not.



I sent a note to Van's on the recommended throttle cable being too short - my reply was "a lot of people use it so you must have changed something".



Carl



On Oct 18, 2012, at 9:04 AM, "AirMike" <Mikeabel(at)Pacbell.net> wrote:



 	  Quote: 	
		   

 

 Sure enough, my Vans OEM 47.5" throttle cable has chaffed through the metal shroud. This, discovered during my annual condition inspection. The Vans web site still shows the, too short 47.5" cable as the suggestion for the RV10, but it is obvious that this is a poor choice. It chaffed through on the bottom of the engine oil case. The suggested replacement on prior blogs is to get the RV7 cable as a replacement which is 50.5" long. Any other suggestions appreciated.

 

 --------

 See you OSH '13

 Q/B - flying 3 yrs.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=385618#385618

flying-nut(at)cfl.rr.com
Guest

Posted: Thu Oct 18, 2012 5:34 am Post subject: Throttle Cable length - short

That's a departure from their normal "We've never heard of that before." 

reply.

It's always 'Kill the messenger".

Linn

On 10/18/2012 9:29 AM, Carl Froehlich wrote:

 	  Quote: 	

 I got the next longer cable listed on the Van's web site and it works fine.  I don't remember if it was the RV-7 one or not.

 I sent a note to Van's on the recommended throttle cable being too short - my reply was "a lot of people use it so you must have changed something".

 Carl

 On Oct 18, 2012, at 9:04 AM, "AirMike" <Mikeabel(at)Pacbell.net> wrote:

> 

>

> Sure enough, my Vans OEM 47.5" throttle cable has chaffed through the metal shroud. This, discovered during my annual condition inspection. The Vans web site still shows the, too short 47.5" cable as the suggestion for the RV10, but it is obvious that this is a poor choice. It chaffed through on the bottom of the engine oil case. The suggested replacement on prior blogs is to get the RV7 cable as a replacement which is 50.5" long. Any other suggestions appreciated.

>

> --------

> See you OSH '13

> Q/B - flying 3 yrs.

>

>

> Read this topic online here:

>

> http://forums.matronics.com/viewtopic.php?p=385618#385618

>

>

 -----

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Kellym

Joined: 10 Jan 2006
Posts: 1706
Location: Sun Lakes AZ

Posted: Thu Oct 18, 2012 6:50 am Post subject: Throttle Cable length - short

Now that you know the range of length needed, you can get a good cable 

from McFarlane. They make a 4 ft length as stock, or will make exact 

length you want.

You can get stock push pull cable, button release vernier cable, or 

their new combo push pull/vernier with no release button.

http://www.mcfarlane-aviation.com



On 10/18/2012 6:04 AM, AirMike wrote:

 	  Quote: 	
		   



 Sure enough, my Vans OEM 47.5" throttle cable has chaffed through the metal shroud. This, discovered during my annual condition inspection. The Vans web site still shows the, too short 47.5" cable as the suggestion for the RV10, but it is obvious that this is a poor choice. It chaffed through on the bottom of the engine oil case. The suggested replacement on prior blogs is to get the RV7 cable as a replacement which is 50.5" long. Any other suggestions appreciated.



 --------

 See you OSH '13

 Q/B - flying 3 yrs.





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=385618#385618






	


-----

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Checked by AVG - www.avg.com

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Thu Oct 18, 2012 4:34 pm Post subject: Re: Throttle Cable length - short

"We've never heard of this before" is just wrong.



My throttle and mixture cables were both too short (absolutely stock build, standard QB fuselage, Van's supplied engine and mount), and I exchanged numerous emails and photos with Vans and they were perplexed. I cannot tell where the QC problem is, if the cables are varying, or the engines, or what.



I was able to make it work by moving the arms (not over center) a bit and by using a more direct routing than shown in the instructions. I have applied RTV and Adel clamps (not tight) in places to try to protect the cable from abrasion. So far (100 hours) so good. But at some point in time I will replace them with longer ones.



Bob

_________________
Bob Turner
RV-10 QB

Kellym

Joined: 10 Jan 2006
Posts: 1706
Location: Sun Lakes AZ

Posted: Thu Oct 18, 2012 4:44 pm Post subject: Throttle Cable length - short

I don't know, but I suspect that everything is based on 410RV which has 

a narrow deck engine. That is why the prop governor as delivered isn't 

correct, and so on., since all engines Vans sells are wide deck. It 

shouldn't matter on the throttle or mixture, but stranger things have 

happened.  The other area that can vary is where the piece mounting the 

cables to the instrument panel is located and how it is oriented.



On 10/18/2012 5:34 PM, Bob Turner wrote:

 	  Quote: 	
		   



 "We've never heard of this before" is just wrong.



 My throttle and mixture cables were both too short (absolutely stock build, standard QB fuselage, Van's supplied engine and mount), and I exchanged numerous emails and photos with Vans and they were perplexed. I cannot tell where the QC problem is, if the cables are varying, or the engines, or what.



 I was able to make it work by moving the arms (not over center) a bit and by using a more direct routing than shown in the instructions. I have applied RTV and Adel clamps (not tight) in places to try to protect the cable from abrasion. So far (100 hours) so good. But at some point in time I will replace them with longer ones.



 Bob



 --------

 Bob Turner

 RV-10 QB





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=385650#385650






	


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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

rv10flyer(at)live.com
Guest

Posted: Thu Oct 18, 2012 5:06 pm Post subject: Throttle Cable length - short

You may be on to something, I have a narrow deck, which might explain why I 

never had an issue with either the prop nor the throttle cables.  I happen 

to have checked both last week as I go through my condition inspection and 

they looked fine, the rubber donuts look a little cracked up however but the 

cables look fine.

--

Strasnuts

Joined: 10 Feb 2009
Posts: 502
Location: Salt Lake City, UT

Posted: Thu Oct 18, 2012 5:27 pm Post subject: Throttle Cable length - short

I have a wide deck and stock cables. They work good and were plenty long. 270 hours. 



Sent from my iPhone



On Oct 18, 2012, at 19:05, "Pascal" <rv10flyer(at)live.com> wrote:



[quote] 

 

 You may be on to something, I have a narrow deck, which might explain why I never had an issue with either the prop nor the throttle cables.  I happen to have checked both last week as I go through my condition inspection and they looked fine, the rubber donuts look a little cracked up however but the cables look fine.

 

 

 --

_________________
40936
RV-10 SB N801VR Flying
780 Hours
SuperSTOL 60 hours

Tim Olson

Joined: 25 Jan 2007
Posts: 2882

Posted: Thu Oct 18, 2012 8:10 pm Post subject: Throttle Cable length - short

I'm not sure what deck I have, but I replaced my cables

this year and I bought all of the standard Van's lengths

for my quadrant install.  On my particular install, I

certainly wouldn't want to add any length.  I did have

some chafing from my cable to oil sump, but I consider

that to be my fault..it's a close fit and I did nothing

to protect the cable. It was just some sheathing wear,

nothing that went into the metal shell. But, when

I did the reinstall I added a 2" section of rubber

hose over the cable, RTV'd in place, and also did

a better job on the clamps.  Will be hitting 900

hours this weekend.



Tim Olson - RV-10 N104CD

do not archive

On 10/18/2012 8:27 PM, Seano wrote:

[quote] 



 I have a wide deck and stock cables. They work good and were plenty long. 270 hours.



 Sent from my iPhone



 On Oct 18, 2012, at 19:05, "Pascal" <rv10flyer(at)live.com> wrote:



> 

>

> You may be on to something, I have a narrow deck, which might explain why I never had an issue with either the prop nor the throttle cables.  I happen to have checked both last week as I go through my condition inspection and they looked fine, the rubber donuts look a little cracked up however but the cables look fine.

> --

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