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rafael(at)gforcecable.com Guest
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Posted: Fri Aug 03, 2007 4:23 pm Post subject: Elevator trim rigging |
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Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael
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andrew.phillips(at)sympat Guest
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Posted: Fri Aug 03, 2007 5:10 pm Post subject: Elevator trim rigging |
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John Brunke
Joined: 10 Jan 2006 Posts: 43
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Posted: Fri Aug 03, 2007 6:02 pm Post subject: Elevator trim rigging |
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Dear Rafael,
I had the same problem, till a more experienced builder told me to put a bend in the threaded rod.
It will lift it just slightly and should give you a little more breathing room.
Hope that works for you. Sorry I don't have a photo close by to send.
John Brunke
RV7 in progress
[quote] ---
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rafael(at)gforcecable.com Guest
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Posted: Fri Aug 03, 2007 7:05 pm Post subject: Elevator trim rigging |
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Thanks!
That makes a lot of sense. It’s definitely less traumatic than removing al that aluminum.
I’ll try it.
Regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of J. Brunke
Sent: Friday, August 03, 2007 11:04 PM
To: rv7-list(at)matronics.com
Subject: Re: Elevator trim rigging
Dear Rafael,
I had the same problem, till a more experienced builder told me to put a bend in the threaded rod.
It will lift it just slightly and should give you a little more breathing room.
Hope that works for you. Sorry I don't have a photo close by to send.
John Brunke
RV7 in progress
[quote]
---
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fvalarm(at)rapidnet.net Guest
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Posted: Fri Aug 03, 2007 10:25 pm Post subject: Elevator trim rigging |
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Rafael,
My kit came with two sets of aluminum material to make the horn which is riveted to the trim surface and connects to the rod. One is for manual trim and one for electric. Are you sure that your using the correct one? I don't recall having to trim or enlarge the hole for the rod.
Bevan
Rv7A wiring
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Rafael
Sent: Friday, August 03, 2007 5:22 PM
To: rv7-list(at)matronics.com
Subject: Elevator trim rigging
Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael
[quote][b]
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rafael(at)gforcecable.com Guest
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Posted: Sat Aug 04, 2007 3:52 am Post subject: Elevator trim rigging |
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Bevan,
Thanks for your input.
I believe I have the correct type installed.
I also have two sets of horns: one with the provision for either electric or manual trim, and another for electric trim only.
On the one for either installation, there are two sets of holes. One set, further from the trim surface, is for the manual trim. The other, closest to the trim surface, is for electric trim. One is supposed to trim off the excess material for the electric trim installation.
On the other set of horns, those for electric trim, there is only one set of holes and no material trimming is necessary. When I compare the set horn for universal installation with the ones for electric installation only, the dimensions are the same after trimming the excess material on the dual ones.
Now, if one were to use the manual trim holes on the dual horns in an electric installation, there would indeed be plenty of clearance for the rod. This makes me wonder why did Vans make the electric trim horns so much closer to the trim tab.
Thanks and best regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of B Tomm
Sent: Saturday, August 04, 2007 2:23 AM
To: rv7-list(at)matronics.com
Subject: RE: Elevator trim rigging
Rafael,
My kit came with two sets of aluminum material to make the horn which is riveted to the trim surface and connects to the rod. One is for manual trim and one for electric. Are you sure that your using the correct one? I don't recall having to trim or enlarge the hole for the rod.
Bevan
Rv7A wiring
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Rafael
Sent: Friday, August 03, 2007 5:22 PM
To: rv7-list(at)matronics.com
Subject: Elevator trim rigging
Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael Quote: | http://www.matronics.com/Navigator?RV7-List | 01234
[quote][b]
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rafael(at)gforcecable.com Guest
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Posted: Sat Aug 04, 2007 6:58 am Post subject: Elevator trim rigging |
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Thanks again, John for your suggestion.
I bent the rod a few degrees and that worked very well. It not only gave me good clearance, but I was also to correct for the slight miss-alignment.
I now have another question: I measure a trim control of 20.6 degrees up trim max. and 23.2 degrees down trim max. Van’s figures, on section 15: Flight Controls, call for Maximum up/down of 25-35 degrees. That implies to me that a minimum travel of 50 degrees is necessary. I’m getting 43.8 degrees, so there’s no way to meet these numbers. It’s all that the motor actuator will give.
Any comments as to what’s going on?
Thanks and regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Rafael
Sent: Friday, August 03, 2007 10:58 PM
To: rv7-list(at)matronics.com
Subject: RE: Elevator trim rigging
Thanks!
That makes a lot of sense. It’s definitely less traumatic than removing al that aluminum.
I’ll try it.
Regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of J. Brunke
Sent: Friday, August 03, 2007 11:04 PM
To: rv7-list(at)matronics.com
Subject: Re: Elevator trim rigging
Dear Rafael,
I had the same problem, till a more experienced builder told me to put a bend in the threaded rod.
It will lift it just slightly and should give you a little more breathing room.
Hope that works for you. Sorry I don't have a photo close by to send.
John Brunke
RV7 in progress
[quote]
---
| - The Matronics RV7-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?RV7-List |
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sshook(at)cox.net Guest
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Posted: Sat Aug 04, 2007 3:54 pm Post subject: Elevator trim rigging |
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I had the same question when I was working on my Elevators. I believe somewhere in the electric trim instructions it does say that you can put a bend in the threaded rod.
Scott R. Shook
RV-7A (Building)
N696JS (Reserved)
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Rafael
Sent: Friday, August 03, 2007 17:22
To: rv7-list(at)matronics.com
Subject: Elevator trim rigging
Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael
[quote][b]
| - The Matronics RV7-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?RV7-List |
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Don Owens
Joined: 17 Jan 2006 Posts: 24 Location: North Central Washington
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Posted: Sun Aug 05, 2007 8:21 am Post subject: Elevator trim rigging |
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Hi Rafael,
<![if !supportEmptyParas]> <![endif]>
Thanks for the post. I have just been working on the same thing. Now I need to hook up the actuating rod and see if I have the same problem. If it does, I’ll let you know.
<![if !supportEmptyParas]> <![endif]>
In the mean time, thanks for making me aware of a potential problem.
<![if !supportEmptyParas]> <![endif]>
Don Owens
<![if !supportEmptyParas]> <![endif]>
<![if !supportEmptyParas]> <![endif]>
Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael
[quote][b]
| - The Matronics RV7-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:
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Don Owens
Joined: 17 Jan 2006 Posts: 24 Location: North Central Washington
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Posted: Mon Aug 06, 2007 7:59 am Post subject: Elevator trim rigging |
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Rafael,
<![if !supportEmptyParas]> <![endif]>
Well, I checked the actuating rod on my elevator trim system and found that it also had too much interference.
<![if !supportEmptyParas]> <![endif]>
I took it all apart and removed some sheet metal where it was rubbing. Also I used a sander and ground the threads off in the middle portion of the rod so it would not bind if it did rub on the sheet metal. Now it only rubs the sheet metal in an extreme nose down trim position.
<![if !supportEmptyParas]> <![endif]>
If I need that much nose down trip perhaps I should remove the excess weight from my baggage compartment. J
<![if !supportEmptyParas]> <![endif]>
Don
[quote][b]
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yenduc(at)sbcglobal.net Guest
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Posted: Wed Aug 08, 2007 9:52 pm Post subject: Elevator trim rigging |
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Rafael:
I just got back from a trip and saw your question about the trim travel. I measured mine today and it is very close to your measurement. I have 20.3 up trim (down movement of the trim tab) and 24.8 down trim (up movement of the trim tab) for a total of 45.3. As I recall from the last RV that I flew you use very little of the trim tab to adjust for approach speed and curse. I see no method of getting more travel without changing the trim servo. Maybe someone else has a method to get more travel from the servo.
good luck
dave
RV 7A
Starting on the cowling
On Aug 4, 2007, at 7:54 AM, Rafael wrote:
[quote]
Thanks again, John for your suggestion.
I bent the rod a few degrees and that worked very well. It not only gave me good clearance, but I was also to correct for the slight miss-alignment.
I now have another question: I measure a trim control of 20.6 degrees up trim max. and 23.2 degrees down trim max. Van’s figures, on section 15: Flight Controls, call for Maximum up/down of 25-35 degrees. That implies to me that a minimum travel of 50 degrees is necessary. I’m getting 43.8 degrees, so there’s no way to meet these numbers. It’s all that the motor actuator will give.
Any comments as to what’s going on?
Thanks and regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com (owner-rv7-list-server(at)matronics.com)] On Behalf Of RafaelSent: Friday, August 03, 2007 10:58 PMTo: rv7-list(at)matronics.com (rv7-list(at)matronics.com)Subject: RE: Elevator trim rigging
Thanks!
That makes a lot of sense. It’s definitely less traumatic than removing al that aluminum.
I’ll try it.
Regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com (owner-rv7-list-server(at)matronics.com)] On Behalf Of J. BrunkeSent: Friday, August 03, 2007 11:04 PMTo: rv7-list(at)matronics.com (rv7-list(at)matronics.com)Subject: Re: Elevator trim rigging
Dear Rafael,
I had the same problem, till a more experienced builder told me to put a bend in the threaded rod.
It will lift it just slightly and should give you a little more breathing room.
Hope that works for you. Sorry I don't have a photo close by to send.
John Brunke
RV7 in progress
[quote]
---
| - The Matronics RV7-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?RV7-List |
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g4mech(at)sbcglobal.net Guest
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Posted: Wed Aug 08, 2007 10:12 pm Post subject: Elevator trim rigging |
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Yep, my RV-7 needs VERY little trim changes through the full speed range.
Mike
RV-7
250 Hours
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Dave Cudney
Sent: Wednesday, August 08, 2007 10:49 PM
To: rv7-list(at)matronics.com
Subject: Re: Elevator trim rigging
Rafael:
I just got back from a trip and saw your question about the trim travel. I measured mine today and it is very close to your measurement. I have 20.3 up trim (down movement of the trim tab) and 24.8 down trim (up movement of the trim tab) for a total of 45.3. As I recall from the last RV that I flew you use very little of the trim tab to adjust for approach speed and curse. I see no method of getting more travel without changing the trim servo. Maybe someone else has a method to get more travel from the servo.
good luck
dave
RV 7A
Starting on the cowling
On Aug 4, 2007, at 7:54 AM, Rafael wrote:
Quote: |
Thanks again, John for your suggestion.
I bent the rod a few degrees and that worked very well. It not only gave me good clearance, but I was also to correct for the slight miss-alignment.
I now have another question: I measure a trim control of 20.6 degrees up trim max. and 23.2 degrees down trim max. Van’s figures, on section 15: Flight Controls, call for Maximum up/down of 25-35 degrees. That implies to me that a minimum travel of 50 degrees is necessary. I’m getting 43.8 degrees, so there’s no way to meet these numbers. It’s all that the motor actuator will give.
Any comments as to what’s going on?
Thanks and regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com (owner-rv7-list-server(at)matronics.com)] On Behalf Of RafaelSent: Friday, August 03, 2007 10:58 PMTo: rv7-list(at)matronics.com (rv7-list(at)matronics.com)Subject: RE: Elevator trim rigging
Thanks!
That makes a lot of sense. It’s definitely less traumatic than removing al that aluminum.
I’ll try it.
Regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com (owner-rv7-list-server(at)matronics.com)] On Behalf Of J. BrunkeSent: Friday, August 03, 2007 11:04 PMTo: rv7-list(at)matronics.com (rv7-list(at)matronics.com)Subject: Re: Elevator trim rigging
Dear Rafael,
I had the same problem, till a more experienced builder told me to put a bend in the threaded rod.
It will lift it just slightly and should give you a little more breathing room.
Hope that works for you. Sorry I don't have a photo close by to send.
John Brunke
RV7 in progress
Quote: |
----- Original Message -----
From: Rafael (rafael(at)gforcecable.com)
To: rv7-list(at)matronics.com (rv7-list(at)matronics.com)
Sent: Friday, August 03, 2007 6:22 PM
Subject: Elevator trim rigging
Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael href="http://www.matronics.com/Navigator?RV7-List">http://www.matronics.com/Navigator?RV7-Listhref="http://forums.matronics.com">http://forums.matronics.com | 0123456789
0href="http://www.matronics.com/Navigator?RV7-List">http://www.matronics.com/Navigator?RV7-List | 1[/b] [quote][b]
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rafael(at)gforcecable.com Guest
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Posted: Thu Aug 09, 2007 3:26 am Post subject: Elevator trim rigging |
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Thanks!
That’s what it is and it looks like it will do fine.
Cheers,
Rafael
RV7A Just finishing the empennage.
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Dave Cudney
Sent: Thursday, August 09, 2007 1:49 AM
To: rv7-list(at)matronics.com
Subject: Re: Elevator trim rigging
Rafael:
I just got back from a trip and saw your question about the trim travel. I measured mine today and it is very close to your measurement. I have 20.3 up trim (down movement of the trim tab) and 24.8 down trim (up movement of the trim tab) for a total of 45.3. As I recall from the last RV that I flew you use very little of the trim tab to adjust for approach speed and curse. I see no method of getting more travel without changing the trim servo. Maybe someone else has a method to get more travel from the servo.
good luck
dave
RV 7A
Starting on the cowling
On Aug 4, 2007, at 7:54 AM, Rafael wrote:
Thanks again, John for your suggestion.
I bent the rod a few degrees and that worked very well. It not only gave me good clearance, but I was also to correct for the slight miss-alignment.
I now have another question: I measure a trim control of 20.6 degrees up trim max. and 23.2 degrees down trim max. Van’s figures, on section 15: Flight Controls, call for Maximum up/down of 25-35 degrees. That implies to me that a minimum travel of 50 degrees is necessary. I’m getting 43.8 degrees, so there’s no way to meet these numbers. It’s all that the motor actuator will give.
Any comments as to what’s going on?
Thanks and regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com (owner-rv7-list-server(at)matronics.com)] On Behalf Of Rafael
Sent: Friday, August 03, 2007 10:58 PM
To: rv7-list(at)matronics.com (rv7-list(at)matronics.com)
Subject: RE: Elevator trim rigging
Thanks!
That makes a lot of sense. It’s definitely less traumatic than removing al that aluminum.
I’ll try it.
Regards,
Rafael
From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com (owner-rv7-list-server(at)matronics.com)] On Behalf Of J. Brunke
Sent: Friday, August 03, 2007 11:04 PM
To: rv7-list(at)matronics.com (rv7-list(at)matronics.com)
Subject: Re: Elevator trim rigging
Dear Rafael,
I had the same problem, till a more experienced builder told me to put a bend in the threaded rod.
It will lift it just slightly and should give you a little more breathing room.
Hope that works for you. Sorry I don't have a photo close by to send.
John Brunke
RV7 in progress
Quote: |
----- Original Message -----
From: Rafael (rafael(at)gforcecable.com)
To: rv7-list(at)matronics.com (rv7-list(at)matronics.com)
Sent: Friday, August 03, 2007 6:22 PM
Subject: Elevator trim rigging
Hi folks!
I would appreciate some help. I’m trying to rig up the electric trim and find that I need to trim away quite a bit of metal to eliminate interference for the full down trim.
I followed Van’s instructions regarding the positioning of the trim motor mount. As you can see from the pictures, though still within the opening footprint,
the actuating rod turned out pretty close to the inboard edge. (I thought about centering the mounts at the time, but decided to trust the plans.)
After installing the trim system, there is a slight miss-alignment, but nothing that would cause stress in the system. I made some marks on the max, min, and half-way travel of the actuating rod. I then adjusted the length for no trim at the half-way point.
What worries me most is the amount of metal I have to file out to prevent the actuating rod from contacting the elevator under max down trim. As you can see, I’ve already removed quite a bit of Aluminum. I hesitate to trim further without some reassurance.
Van’s builder’s assistance is closed for the weekend, so I thought I would seek y’alls’ help (I recently moved to Aiken, SC, and I’m learning the local grammar )
Thanks and best regards,
Rafael href="http://www.matronics.com/Navigator?RV7-List">http://www.matronics.com/Navigator?RV7-Listhref="http://forums.matronics.com">http://forums.matronics.com http://www.matronics.com/Navigator?RV7-List | 01
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