VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-7/7A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 01-29-2018, 01:32 AM
Mick RV7 Mick RV7 is offline
 
Join Date: Sep 2017
Location: Wee Waa NSW Australia
Posts: 6
Question Elevator electric trim servo

I have a T3-12A electric trim servo and spent this afternoon installing it.All was good till I cycled the servo.When I retracted it the leadscrew didn't line up with the 5/8 hole in the E-702 spar.I was confused thinking I mounted it incorrectly so do I make a hole in the spar to accommodate the leadscrew?
Reply With Quote
  #2  
Old 01-29-2018, 12:21 PM
Raymo's Avatar
Raymo Raymo is offline
 
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 1,616
Default

Can you post a picture? I am not clear on your description but the only thing coming through the rear spar would be the wires to the trim servo.
__________________
Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ Catto 3 blade NLE, AFP FM-150 FI, 1 PMag, Vetterman Trombone Exh, SkyTech starter,
PlanePower Alt, FlightLines Interior, James cowl & plenum
All lines by TSFlightLines
NSDQ

"The object of the game, gentlemen, is not to cheat death: the object is not to let him play."
Patrick Poteen, Sgt. U.S. Army
Reply With Quote
  #3  
Old 01-29-2018, 07:13 PM
Pat Hatch's Avatar
Pat Hatch Pat Hatch is offline
 
Join Date: Jun 2006
Location: Vero Beach, FL
Posts: 803
Default

Quote:
Originally Posted by Mick RV7 View Post
I have a T3-12A electric trim servo and spent this afternoon installing it.All was good till I cycled the servo.When I retracted it the leadscrew didn't line up with the 5/8 hole in the E-702 spar.I was confused thinking I mounted it incorrectly so do I make a hole in the spar to accommodate the leadscrew?
Yes, the servo has a jack screw that extends out the back of the unit. It will extend and retract along with the actuator movement. You need to make sure there is a hole and sufficient clearance for this jack screw to go back and forth. I vaguely remember that the 7 has a hole pre-drilled for this, but I could be wrong. In any event, you want to make sure the hole is there and lines up.
__________________
Pat Hatch
RV-4 (Gone to RV heaven)
RV-6 (N44PH - Flying)
RV-7 (Sold)
RV-8 (Helped build Bob Lund's airplane)
www.phaviation.com Trim Relay Boards/Flap Actuators
www.pathatch.com/blog (Photography)
Track Me
Reply With Quote
  #4  
Old 01-30-2018, 06:53 AM
sahrens's Avatar
sahrens sahrens is offline
 
Join Date: Jan 2007
Location: Northern CA
Posts: 360
Default

Look at Drawing 4 in the lower right corner. You see a label ELECTRIC TRIM EXPLODED ISO VIEW, just to the left of that is a note. The note states "Route servo wires through snap bushing allowing travel for servo jack shaft."

When you mount the trim motor inside the elevator trim section that jack shaft should line up with the existing hole. If it doesn't something isn't quite right.
__________________
Scott Ahrens
RV-7 N818BG
Test flight in progress
Reply With Quote
  #5  
Old 01-30-2018, 08:11 AM
bret's Avatar
bret bret is offline
 
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,760
Default

sometimes I would get confused with the drawings up and down ect, the wires go through the spar and the tinny threaded rod will go outside into the airstream pointed towards the trailing edge and attach to the trim tab.
__________________
7A Slider, EFII Angle 360, CS, SJ.
2018 gladly supported
Reply With Quote
  #6  
Old 01-30-2018, 08:54 AM
Larco Larco is offline
 
Join Date: Mar 2005
Location: DVT Phoenix
Posts: 1,010
Default

Quote:
Originally Posted by sahrens View Post
Look at Drawing 4 in the lower right corner. You see a label ELECTRIC TRIM EXPLODED ISO VIEW, just to the left of that is a note. The note states "Route servo wires through snap bushing allowing travel for servo jack shaft."

When you mount the trim motor inside the elevator trim section that jack shaft should line up with the existing hole. If it doesn't something isn't quite right.
+1 on this. Look at the close up drawing and read the instruction and you should be fine. The jack screw has to have a place to go when fully retracted.

__________________
Larry
Reply With Quote
  #7  
Old 01-30-2018, 10:06 AM
AndyWW AndyWW is offline
 
Join Date: Jan 2015
Location: Englefield Green UK
Posts: 48
Default Wire routing

I haven't finalized the route of the wiring yet, and instinctively don't like the suggested routing on the plans where the wires share the same hole as the jack screw. Has anyone else thought this and done something different or am I worrying about nothing as usual?
__________________
Andy @ EGLM/EGTB
RV-6 (Shared, Bought Flying)
Building RV-7 #74424
Starting fuselage
Donated 2018
Reply With Quote
  #8  
Old 01-30-2018, 11:55 AM
BBaxR6 BBaxR6 is offline
 
Join Date: Apr 2010
Location: Savannah, GA
Posts: 16
Default

Quote:
Originally Posted by AndyWW View Post
I haven't finalized the route of the wiring yet, and instinctively don't like the suggested routing on the plans where the wires share the same hole as the jack screw. Has anyone else thought this and done something different or am I worrying about nothing as usual?
Same here, I didn't like sharing the pass-through with the jack screw, so I put a new hole in the spar & snap bushing just inboard of existing jack screw hole. I centered it in the most outboard elevator horn "lightening hole", so I don't have any concerns personally with an additional hole since the horn acts as a big, strong doubler. This way my wiring is no where near the jack screw during any operation. I can dig up a picture when I get home if you like!
__________________
Brandon
RV-7 Empennage complete; wings ordered!
http://bbaxrv7.blogspot.com/

Last edited by BBaxR6 : 01-30-2018 at 11:56 AM. Reason: Elevator horn, not rudder!
Reply With Quote
  #9  
Old 01-31-2018, 03:03 PM
rightrudder rightrudder is offline
 
Join Date: Mar 2014
Location: Laguna Hills, CA
Posts: 1,596
Default

Quote:
Originally Posted by BBaxR6 View Post
Same here, I didn't like sharing the pass-through with the jack screw, so I put a new hole in the spar & snap bushing just inboard of existing jack screw hole. I centered it in the most outboard elevator horn "lightening hole", so I don't have any concerns personally with an additional hole since the horn acts as a big, strong doubler. This way my wiring is no where near the jack screw during any operation. I can dig up a picture when I get home if you like!
I did the same...I was worried that jack screw would chafe the wiring.
__________________
Doug
RV-9A "slider"
Flew to Osh in 2017!
Tail number N427DK
Donation made for 2018
You haven't seen a tree until you've seen its shadow from the sky -- Amelia Earhart
Reply With Quote
  #10  
Old 02-01-2018, 07:25 PM
griffg griffg is offline
 
Join Date: Apr 2015
Location: Sydney, Australia
Posts: 12
Default Elevator wiring

If you click on the link below you will see this previous discussion from last year. If you go to the bottom of the second screen you will seem my input to that discussion plus the two links to my photographs

http://www.vansairforce.com/communit...d.php?t=120307

Regards,

Gordon
__________________
Gordon Griffin
RV-7A quickbuild under construction
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 07:35 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.