lml@lancaironline.net Mailing List Archive

I have determined that this Lancair panel uses a Precise Flight built Lancair Trim Board Logic box 080A0017 rev.b. There are no schematics or instructions with this box which is unusual--just the pin outs. There are separate power feeds for pitch and roll circuits to this box and a ribbon cable leads from the yoke switches and the box figures out what to do with the servos. Inside this box, there are two beautiful circuit boards with variable pots and adjustable voltage regulators. It would be nice to have that schematic if this circuit can indeed regulate the speed of the Ray Allen servos. I'm hoping the LM regulators simply have to be set down to the proper voltage. I have written Lancair Avionics and Precise Flight--so far no joy. If anyone has info on this box, it would save a lot of headaches for a few Lancairs I'm sure. Paul N357V On 2011-02-16, at 2:10 PM, Ron Jones wrote: Excellent. Thanks. I had numerous wiring problems with my Lancair panel and wiring harness. I'm slowly tracking them down and fixing. It was mostly the wiring harness. Ron Jones Sent from Ron's iPhone ... On Feb 16, 2011, at 11:55 AM, paul miller <paul@tbm700.com> wrote: I know why the potentiometer doesn't work and you probably have the same 3-channel trim board that feeds the trim servos. Once I get the correct wiring tested I'll give it to you to look at. Paul N357V On 2011-02-16, at 9:17 AM, Ron Jones wrote: I had my panel wired at Lancair, too. I also have the adjustable pot for pitch trim. It does absolutely nothing. When I called Lancair to complain, they suggested it would make a difference under air loads. Really? How do I test that? The fact is that it just doesn't work. Never has. Is it wired incorrectly? Don't know. Still, the airplane is quite flyable as is. I, too, merely "bump" the trim switch when in cruise. It's darn sensitive, but you get used to it. At pattern speeds, it's not a problem. Could I get it switched off in a timely manner in the case of a runaway? Good question. Ron Jones www.legacy-innovations.com ron@legacy-innovations.com Sent from Ron's iPad . . . On Feb 16, 2011, at 4:53 AM, paul miller <paul@tbm700.com> wrote: Determined a properly setup 12v trim will take about 30 seconds full up to full down in a Legacy. That sounds about right and Ed Martin's Legacy here is working the right way. Mine and others at 6 seconds means that you have about 3 seconds from level flight to full deflection in a runaway. That's not enough to activate the safety cutout or manually find a disconnect. On a night approach or close to the ground that just isn't going to be detectable before things go wrong. So, I'm still looking for the right wiring, I had my panel wired by Lancair Avionics but the box that controls the trim has no label and the pot that is supposed to control speed only stops the pitch trim so it isn't working properly. We'll get it right but 6 seconds isn't safe imo. Paul Legacy 186 Spruce Creek -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html