RV-4 panel replacement - cut and use existing panel?

jamlip · #1 03-24-2019, 11:37 PM

I am interested in updating the panel of my 1987 RV-4.

To minimise downtime, I was wondering if it would be acceptable to cut-away the existing panel to create a flange of 3/4" or so all the way around, fix anchor nuts to the back, and then attach the new panel over the top with machine screws?

I guess what I'm really asking is - is the panel a structural in an RV-4?

And, is this acceptable practice, or a hokey mess? I feel fairly confident that it will look smart when finished.

Christopher Murphy · #2 03-25-2019, 06:39 AM

In my opinion, what you are proposing would be more work than just making a new panel.

Cm

Flying EMT · #3 03-25-2019, 07:29 AM

Last year I replaced my panel. Did it thru UpNorth aviation. Had the new panel sent directly to him from Vans, he cut it to my specs for the dynons and I just used the old panel for a template for the mounting pieces. Replacing the panel is easy if you can do simple riveting. Before/after pictures on RV-4 forum ?show us your panel? page 18. Ben

RWoodard · #4 03-25-2019, 07:55 AM

A local friend had his panel updated a few years ago in the same manner you describe. I have the same plans for my RV-3 whenever my schedule allows time for an upgrade and I can tolerate being without the plane.

I?m trying to avoid drilling out rivets to replace the panel in its entirety because I don?t want to mess up my paint?still in exceptional condition after 20 years!

With my friend?s permission, I?ll try to snap some pics next time I?m at the airport. The front skin behind the firewall is currently removed for some other maintenance activities.

CCG · #5 03-25-2019, 10:09 AM

I replaced the panel in my RV4 a couple of years ago. I used the existing panel, installed some nutplates, and cut out the center section. Ordered a new panel from Vans, cut to my liking and installed. Saved a bunch of time vs trying to replace the entire assembly.

rag · #6 03-25-2019, 10:09 AM

I upgraded my panel 6 months ago in my 1989 RV4. I made an overlay that I screwed over the top of the existing panel. Cut out the existing panel where there was interference with the new cut outs. It worked well and I did not have to reconstruct the flange seal to canopy or the latch with the canopy. I can send you pictures if you send your email address. My email is N1322D@GMAIL.COM

cguarino · #7 03-25-2019, 02:03 PM

I had the same question. I called Van's and was told that the panel is not structural other than to hold the shape of sheetmetal in front of the canopy. There is however, I small cross bar under the panel that does carry some load. I think it just keeps the fuselage square. What you want to do will work but it is easy to just replace the panel.

Lufthans · #8 03-28-2019, 09:30 AM

That's exactly what we've done. Works well..

smokyray · #9 03-28-2019, 02:46 PM

Jim,
I built my RV4 back when Dinosaurs roamed the taxiways and steam gauges were the rule. My flea market round dials eventually needed replacement so....
I used MGL Avionics 2 1/4 and 3" digital instruments similar to Hans IFD-Net EFIS* that R&R'd easily in my existing RV4 panel and are lighter weight as a bonus.
Much easier than cutting...

http://www.mglavionics.com/

iPad with the iLevil AHRS work well also...

V/R
Smokey

PS: *Hans, how do you like the IFD-Net EFIS?

Lufthans · #10 03-29-2019, 03:11 AM

Quote:

Originally Posted by smokyray

Jim,

PS: *Hans, how do you like the IFD-Net EFIS?

Love it!

Very lightweight and small box. A breeze to install and set up, very affordable (I believe we've paid around $850 for it) and works flawlessly.

They have two different models, one with moving map and digital images of round instruments (and HSI) at the push of a button. We've chosen the simple one, with just the EFIS screen. Plenty for us.