Building Tip - Elevator Trim Hinge Pin

f1rocket · #1 03-31-2005, 05:49 AM

This is an idea that many people have used in the past. Unfortunately, I found out about it after I had built my RV-6. I struggled with finding a way to secure the hinge pin on the elevator trim tab until I saw this technique used on some RVs that I looked at up at Air Venture.

As supplied in the kit, the hinge is longer than what's needed. When you trim the hinge to length, be sure to NOT cut the hinge pin. Leave it long and extending past the end of the elevator as shown above. Now bend the hinge pin so that it will lay across the web of the spar.

Take a spare piece of hinge and cut out one eye. Drill a hole in it for a #6 screw. Slip it over the hinge pin and locate the position of the screw hole in the web of the spar. Remove everything and attach a #6 nut plate behind the hole. The nut plate will fit on the forward side of the elevator trim spar web where it extends past the edge of the inside elevator rib. When you're done, you'll find that you will be able to get a long bladed screwdriver on the screw even with the trim tab mounted and in-place.

Build9A · #2 03-31-2005, 07:01 AM

That's a great tip. It sure looks better than my safety job. I'm going to retrofit one on my elev. trim. thanks, Jack

fehdxl · #3 03-31-2005, 07:41 AM

I agree, excellent information! Too bad we can't search this site for the word 'tip' ... too few letters. Maybe we could use a keyword such ast BTIP for Building TIPs? Just a thought. Anyway, thanks for the information Randy!

-Jim
o=\o

Keywords: BTIP, tips, tricks, hints, safety,

f1rocket · #4 03-31-2005, 08:43 AM

Just FYI, I asked Doug a couple of months ago if he would set up a category for building tips. I could see where it would be hard to control what got posted there, but it might make it easier to find stuff.

Anyway, I have a couple more tips I'll post in the coming days.

H6 RV-6A · #5 03-31-2005, 11:42 AM

THANKS!! I was just finishing up my trimtab and was trying to figure out how to secure it.

Chris

alpinelakespilot2000 · #6 03-31-2005, 12:48 PM

I'm just getting ready to attach my trim tab on my -9 now. Is there any reason not to just bend and safety wire the hinge pin like the blueprints suggest? Is this a "cosmetic" issue only or is there some structural/safety issue for screwing the hinge pin in place?

Regardless, thanks for providing the detailed tip--the pics really help.

Steve

Build9A · #7 03-31-2005, 01:23 PM

It's not a safety issue. The safety wire works fine. It's cosmetic only. Jack

n2prise · #8 03-31-2005, 09:26 PM

Van's guys have designed things to be simple and economical. Safety wire is cheap and effective for this application. The hinge tab is how Van's secures the two hinge pins that hold the upper and lower cowl together.

Jerry K. Thorne
East Ridge, TN
RV-9A N2PZ

RudiGreyling · #9 03-31-2005, 11:32 PM

Nice tip, and yes a "building tips" forum category would be great and easy to search.

Ron · #10 04-05-2005, 06:57 PM

Does each side of the hinge slide into the respective spars until the eyes meet the skin, or is there a set distance, Unless I'm missing something, I can't see on the plans..It looks like a 1/4" which is the thickness of the eyes..