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Safety-Trim Group Buy

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rnewman(at)tcwtech.com
Guest

Posted: Tue Dec 11, 2007 2:55 pm Post subject: Safety-Trim Group Buy

Dear Fellow RV Builders,

  

           TCW Technologies  and SteinAir are pleased to announce a group buy is now available on our new  servo trim controller.    Safety-Trim is an electronic trim  servo controller that resolves the issues with run-away trim conditions plus it  provides 2 speed trim operation as well as greatly simplified switch  wiring.

  

            For all the  detail please follow this direct link:

  

 [url=]http://www.vansairforce.com/community/showthread.php?t=24478[/url]

  

  

 Thank you,

 Bob Newman

 TCW Technologies

 [url=]www.tcwtech.com[/url]

  



   [quote][b]

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jfrjr(at)roadrunner.com
Guest

Posted: Tue Dec 11, 2007 7:37 pm Post subject: Safety-Trim Group Buy

[quote]   Bob and or Stein:  Sign me up for the two axis    model.  Jay Rowe #40301   jfrjr(at)roadrunner.com (jfrjr(at)roadrunner.com) 

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Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Tue Dec 11, 2007 8:04 pm Post subject: Safety-Trim Group Buy

Jay (and others) you may want to just go use the VAF link that Bob gave,

because I don't think Stein wanted to run a tally on 2 forums.  That way

he can count you over on that list.  I know, it's clumsy, but I have a

feeling that if you just post it here, you'll get lost in the process.



For the RV-10 people, I do have an offhand comment that I can't quote

first hand, but, I did hear that at least someone at Vans commented that

while the other RV's are do-able with full runaway trim, the -10 is

a notable different animal, and they know that.  So for those who are

just operating under the assumption that it's designed in such a way

that full trim won't cause major fly-ability issues, you may actually

want to ask them about their thoughts.  Not sure what answer you'd

get by asking, as what I heard was somewhat indirect.



Tim Olson - RV-10 N104CD - Flying

do not archive

Jay Rowe wrote:

[quote] 

     Bob and or Stein:  Sign me up for the two axis model.  Jay Rowe

     #40301   jfrjr(at)roadrunner.com <mailto:jfrjr(at)roadrunner.com>

 

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DAVELEIKAM(at)wi.rr.com
Guest

Posted: Tue Dec 11, 2007 8:11 pm Post subject: Safety-Trim Group Buy

I'm in for a two axis model.

  

 Dave Leikam

 40496

  

 do not archive

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wayne.e(at)grandecom.net
Guest

Posted: Wed Dec 12, 2007 5:22 am Post subject: Safety-Trim Group Buy

In response to Tim's post on a runaway trim issue.  When I replaced the Ray Allen trims recently I had a runaway elevator trim on my  first flight after install. I can attest that a runaway trim is not a fun deal,  even if you're from TX  :>}  It ran away so fast there was no time  to disconnect it. What happened was I was on climb out and the minute I hit the  up trim the servo went to full stops up. I normally indicate about 2 or 3 on my  elev trim indicator on climb out and it went to 22.

  

 I had to hold full force pushing the stick forward  to keep the plane from trying to go straight up. It took a pretty strong push to  hold the stick forward, in fact I told the person in the right seat to put his  hand on the stick lightly just in case my arm got too tired. The next issue I  was faced with was how the hell am I going to flair this thing on landing. As I  slowed the plane for landing the control forces let up somewhat, because of the  speed reduction, but I still had to keep forward force on the stick until the  last minute and I released a little to land. Luckily that landing method  worked.

  

 I'm not sure a small woman would have been  able to hold the forward force necessary in this situation. Boy I can only  imagine what a runaway aileron trim would take to control.

  

 We ended up replacing the elev trim servo and have  had no more problems. Ray Allen said it wasn't their trim that caused the  problem but maybe how we wired it. I'm not positive what caused it but if you  were Ray Allen what would you say? I think we wired it the same the second  time.

  

 Wayne Edgerton N602WT

  

  

  

  

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Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Wed Dec 12, 2007 6:08 am Post subject: Safety-Trim Group Buy

I don't think that runaway aileron trim would be nearly the

problem on the -10, as it's not controlling a trim tab...just

biasing a spring.  I think you could run your aileron trim

out full and have it be a non-event.  If you built a trim-tab

type aileron trim though, then that could get pretty scary

I'm sure.  Also, with Van's spring-bias system, the aileron

trim isn't very quick, so I wouldn't speed limit that axis

because it just isn't necessary.



Tim Olson - RV-10 N104CD - Flying

do not archive

Wayne Edgerton wrote:

 	  Quote: 	
		   In response to Tim's post on a runaway trim issue. When I replaced the 

 Ray Allen trims recently I had a runaway elevator trim on my first 

 flight after install. I can attest that a runaway trim is not a fun 

 deal, even if you're from TX  :>}  It ran away so fast there was no time 

 to disconnect it. What happened was I was on climb out and the minute I 

 hit the up trim the servo went to full stops up. I normally indicate 

 about 2 or 3 on my elev trim indicator on climb out and it went to 22.

  

 I had to hold full force pushing the stick forward to keep the plane 

 from trying to go straight up. It took a pretty strong push to hold the 

 stick forward, in fact I told the person in the right seat to put his 

 hand on the stick lightly just in case my arm got too tired. The next 

 issue I was faced with was how the hell am I going to flair this thing 

 on landing. As I slowed the plane for landing the control forces let up 

 somewhat, because of the speed reduction, but I still had to keep 

 forward force on the stick until the last minute and I released a little 

 to land. Luckily that landing method worked.

  

 I'm not sure a small woman would have been able to hold the forward 

 force necessary in this situation. Boy I can only imagine what a runaway 

 aileron trim would take to control.

  

 We ended up replacing the elev trim servo and have had no more problems. 

 Ray Allen said it wasn't their trim that caused the problem but maybe 

 how we wired it. I'm not positive what caused it but if you were Ray 

 Allen what would you say? I think we wired it the same the second time.

  

 Wayne Edgerton N602WT

  

  

  

  

 

 *

 

 

 *

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n212pj(at)gmail.com
Guest

Posted: Wed Dec 12, 2007 10:18 am Post subject: Safety-Trim Group Buy

What trim servo did you end up with.  Was it a  replaced Ray Allen?  

  

 John J

   40328



   From: owner-rv10-list-server(at)matronics.com  [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Wayne  Edgerton

Sent: Wednesday, December 12, 2007 5:21 AM

To:  rv10-list(at)matronics.com

Subject: Re: Safety-Trim Group  Buy

 

 In response to Tim's post on a runaway trim issue.  When I replaced the Ray Allen trims recently I had a runaway elevator trim on my  first flight after install. I can attest that a runaway trim is not a fun deal,  even if you're from TX  :>}  It ran away so fast there was no time  to disconnect it. What happened was I was on climb out and the minute I hit the  up trim the servo went to full stops up. I normally indicate about 2 or 3 on my  elev trim indicator on climb out and it went to 22.

  

 I had to hold full force pushing the stick forward  to keep the plane from trying to go straight up. It took a pretty strong push to  hold the stick forward, in fact I told the person in the right seat to put his  hand on the stick lightly just in case my arm got too tired. The next issue I  was faced with was how the hell am I going to flair this thing on landing. As I  slowed the plane for landing the control forces let up somewhat, because of the  speed reduction, but I still had to keep forward force on the stick until the  last minute and I released a little to land. Luckily that landing method  worked.

  

 I'm not sure a small woman would have been  able to hold the forward force necessary in this situation. Boy I can only  imagine what a runaway aileron trim would take to control.

  

 We ended up replacing the elev trim servo and have  had no more problems. Ray Allen said it wasn't their trim that caused the  problem but maybe how we wired it. I'm not positive what caused it but if you  were Ray Allen what would you say? I think we wired it the same the second  time.

  

 Wayne Edgerton N602WT

  

  

  

  

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