Home > VansAirForceForums

-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

Old 06-15-2019, 10:32 PM
Vansconvert's Avatar
Vansconvert Vansconvert is online now
Join Date: Apr 2014
Location: Racine, WI
Posts: 212
Default Rod end setup on throttle cable

I have a rod end on my throttle cable going to the arm on the fuel injection unit. It has the large washer correctly installed directly under the bolt head, and a combination of three small washers, a short bushing and a much longer bushing. I understand the bushings go on each side of the rod end. However I don?t understand why the one bushing is so much longer than the other, like about 1/2 of an inch which results in quite an off set connection.

Could someone provide a picture of your setup? Or a picture of what Van?s sells in their bearing hardware kit? Or a description of your setup?

I have the Precision fuel injection unit. Thanks much.
IO-360 Hartzell CSP
Reply With Quote
Old 06-16-2019, 01:16 PM
wjb's Avatar
wjb wjb is offline
Join Date: Nov 2012
Location: Half Moon Bay, CA
Posts: 1,121

The exact setup depends on how your throttle cable is routed though the firewall and via the bracket on the bottom of the oil pan. The end of the cable can end end up left or right of "optimum" at the throttle connection.

My Avistar servo has a straight throttle arm, so I didn't need any special spacer .. I did use two small washers on either side to prevent the rod end from touching either the big washer or throttle arm when it's rocked back and forth

The older Van's assembly drawings show the servo with an offset arm; the 1/2 inch spacer is there to move the attach point inwards to where the rod end naturally wants to be. I'd use the plans as a suggestion about sizing of the spacer; I could see it varying a quarter inch either way. YMMV.

Here's my setup:

Here is the Van's drawing:

Bill Bencze
N430WB RV-7 @KHAF, Flying 100+ hrs
VAF 2021 donation happily made

Last edited by wjb : 06-17-2019 at 09:44 AM.
Reply With Quote
Old 06-16-2019, 02:23 PM
JonJay's Avatar
JonJay JonJay is offline
Join Date: Jan 2007
Location: Battleground
Posts: 4,348

Excellent answer from Bill.
It is also helpful to understand what the washers do as you ?customize? to meet your unique requirements, if needed.
The small washers next to the rod end have a small external diameter which allows the ?ball? a wider range of rotation without interference as a normal diameter washer would. The larger diameter washer is there to keep the rod end from sliding off or over the head of the bolt should the rod end center come apart.
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
Reply With Quote
Old 06-16-2019, 02:34 PM
Larco's Avatar
Larco Larco is offline
Join Date: Mar 2005
Location: DVT Phoenix
Posts: 1,254

Sometimes it works well to move the arms from the mixture side to the throttle side and throttle to mixture. That way you can end up with a straight arm on the throttle like the picture posted above. The offset arm has worked on the mixture side for the several I've seen? If that won't work different arms are available from the injector manufacture.
Reply With Quote
Old 06-16-2019, 07:51 PM
Vansconvert's Avatar
Vansconvert Vansconvert is online now
Join Date: Apr 2014
Location: Racine, WI
Posts: 212

Thanks very much!
IO-360 Hartzell CSP
Reply With Quote

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 02:24 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.