The Biplane Forum > Biplane Technical Forums > Firewall Forward & Fuel System > Servo mounting

Thread Tools Display Modes
Old 03-23-2012, 02:17 PM   #1
NDTOO's Avatar
Join Date: Dec 2009
Location: Esmond, ND
Posts: 513
Liked 212 Times on 110 Posts
Likes Given: 19


I am trying to figure out which direction to clock my -5 Bendix servo on my 540 as far as which side to have the throttle and mixture arm. I want to order my throttle quadrants and this may affect which style quad. depending on if I need the cable to push or pull the levers. I'm going fixed pitch Catto so will likely have a verneer cable for the mixture and a single lever quad. for throttle. I am mainly concerned about the routing of the fuel line that goes from the servo up to the flow divider. I have seen some of the Harmon Rocket guys have the servo so the flow divider linefitting is on the top side and the fuel line runs up between two cylinders to the divider. Is this a common practice or would it be better to have the fitting on the bottom and run the fuel line aft, up the back side of the engine and then accross the top to the divider? My concern is all the heat the fuel line would encounter between the two cylinders. Maybe not a concern? How about running the fuel line forward in front of the cylinder? Maybe that would be better? Seems like it would be a shorter route than to the back of the engine.

NDTOO is offline  
Reply With Quote
Old 03-23-2012, 03:09 PM   #2
StinsonPilot's Avatar
Join Date: Nov 2007
Location: North Bend, WA 1WA6
Posts: 2,693
Liked 483 Times on 353 Posts
Likes Given: 145


My IO-360-A1A is set up per the Lycoming IPC and shows the fuel line on top and routed through the cylinders. Mixture on left side, throttle on right.
Runs great.

StinsonPilot is online now  
Reply With Quote
Old 03-23-2012, 08:23 PM   #3
Skybolt31's Avatar
Join Date: Aug 2006
Location: United States
Posts: 869
Liked 156 Times on 106 Posts
Likes Given: 10


I am i the same boat as StinsonPilot
Skybolt31 is offline  
Reply With Quote
Old 03-23-2012, 10:33 PM   #4
smizo's Avatar
Join Date: Sep 2009
Location: Tunkhannock PA
Posts: 4,091
Liked 1016 Times on 638 Posts
Likes Given: 1854


yep same here. Barrett set up my fuel hose to go through the inter cylinder baffling between the cylinders as well. i also have a single throttle and vernier mixture cable, with throttle arm on right side, and mixture on left. mine is a silver hawk fuel injection system but.....
smizo is online now  
Reply With Quote
Old 03-24-2012, 12:53 AM   #5
Flying Ant
Join Date: Aug 2009
Posts: 405
Liked 19 Times on 15 Posts
Likes Given: 1


On my IO-360 the fuel servo is forward facing and has a 90degree -4 fitting on the top, the line runs up between the number 1 and 3 cylinder and into a fitting on the flow divider. No problems at all.

I figure that the heat is mostly coming from the cylinder head cooling fins and the fuel hose runs between the barrels near the crank case.

Flying Ant is offline  
Reply With Quote
Old 03-24-2012, 03:52 AM   #6
NDTOO's Avatar
Join Date: Dec 2009
Location: Esmond, ND
Posts: 513
Liked 212 Times on 110 Posts
Likes Given: 19


Excellent guys, thanks. I ended up ordering a couple quadrants from Baxter Quadrants. Single lever, non reversing for the throttle on the right side with the lever pointing down. Cable travel/lever pushedforward, throttle open. Verneer cable for mixture on the far left side.

NDTOO is offline  
Reply With Quote

Thread Tools
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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
electric servo system BobL Skybolt Miscellaneous 15 05-11-2011 03:29 AM
Servo trim tab hardware? NDTOO Steen Skybolt 0 12-28-2009 02:23 AM
Trim/Servo Tab Adjustment JoeyC Skybolt Miscellaneous 2 06-21-2009 10:32 AM
Servo-style trim tab macwolf Pitts Fuselage & Empennage 5 07-15-2008 02:52 AM
Elevator Servo/Trim Eric Skybolt Fuselage & Empennage 4 09-02-2006 05:44 PM

Newest Threads