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Old 05-28-2018, 07:19 AM
Kupde Kupde is offline
Join Date: May 2016
Location: Tampa,Fl
Posts: 51
Default First flight! and a question

First Flight

Saturday before the big Florida storm hit I was able to do a first flight. Everything went well with no big surprises. One question: my pitch trim works fine on the ground but in flight I found that at cruise that it wouldn?t move past neutral to allow me to trim it out completely. For some reason it showed power going to the trim as I pushed the switch but it wouldn?t move past neutral. Tried it again on the ground and it worked fine. I have a VPX system and I?ve input the positions with plenty of space on each end of travel so not sure hat it is? Any suggestions welcome.

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Old 05-28-2018, 09:22 AM
TS Flightlines TS Flightlines is offline
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,930

Congrats Kevin!!!!!!

Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7A Tail Kit Completed, Fuse started-Pay as I go Plan, on hold while we develop new products for RV builders
Ridgeland, SC,
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Old 05-28-2018, 10:00 AM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 16,100
Default Congratulations

Originally Posted by Kupde View Post
First Flight

Saturday before the big Florida storm hit I was able to do a first flight.
Kevin, big congrats on the new fledgling
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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Old 05-28-2018, 10:06 AM
Lenny Iszak's Avatar
Lenny Iszak Lenny Iszak is offline
Join Date: Sep 2008
Location: Palm City, FL
Posts: 381

Congrats on your first flight!

The VPX might be slowing down your trim motor too much when your airspeed gets higher. I don't have a VPX, but I built a similar speed sensitive trim controller, and when you get it too slow it doesn't have enough power to overcome flight loads on the trim tabs and the trim motor will stall. Speed it back up a bit and it should be fine.
Lenny Iszak
Palm City, FL
2014 RV-10, N311LZ - 775 hrs
OnSpeed development team
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Old 05-28-2018, 11:20 AM
rongawer rongawer is offline
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 774

It might be that the stops are configured in the VP-X different than the PFD (I?m assuming you have an EFIS).

The VPX software has a trim configuration tool. I recommend connecting a laptop to the VP-X and cycling the trim to see what the VP-X thinks is going on. It?s likely just a setting. If you?re using a G3X, there are additional settings for trim in the configuration tool there as well. I imagine Dynon and other AP?s have the same.
Ron Gawer

- RV10, N762G, Build in progress.
- Several others that are now just great memories for me.
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Old 05-28-2018, 12:17 PM
RV3bpilot's Avatar
RV3bpilot RV3bpilot is offline
Join Date: Oct 2012
Location: New Ulm, Minnesota
Posts: 283

Very nice, first flight, Cooooool....
Sorry I don't know anything about electric trim...
Robin Mckee
New Ulm, MN 56073
RV3b N219BB
420 hours and counting
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Old 05-28-2018, 03:50 PM
Kupde Kupde is offline
Join Date: May 2016
Location: Tampa,Fl
Posts: 51

Thanks for inputs. I think it?s like Lenny said the speed power reduction at higher speeds, so I?ll set to a higher limit and see what happens...

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Old 05-28-2018, 08:42 PM
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pilotkms pilotkms is offline
Join Date: Mar 2007
Posts: 526
Default Dynon?

If u have Dynon Skyview with VPX u need to go thru the calibration procedure. Both need to know which one is in charge. Had same issue with my FLAPS. Made for exciting first flight.
RV 7A RV #9700 May 2017
N325KS the Flying K
Built in SoCal KCCB, now in GA @ KPXE
800+ Hours & 7X cross the USA
OSH flyin 2018 & 2019 & Petit Jean 2019 & 2021
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Old 05-29-2018, 09:02 AM
Bill.Peyton's Avatar
Bill.Peyton Bill.Peyton is offline
Join Date: Sep 2009
Location: St. Louis, MO
Posts: 1,885

If u have a G3X gea24 you need to disable the speed sensitivity in the VPX as shown in the vpx manual
Bill Peyton
RV-10 - 1285 hours
First Flight Oct 2012
Aviation Partners, LLC

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.
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