Flap Hinge Bracket Assembly Question

RV6-KPTW · #1 12-20-2015, 07:59 AM

Gents,

On Section 21 Page 6 Step 5 - hinge bracket assembly

I have read thru these instructions and see in step 5 that an AN4-7 is to be inserted into the ".250" holes. An AN4 - will not fit in this hole without re-sizing. I fear perhaps I missed a step in the instructions (although I did read several times...) or that the part was to be supplied with a .250 hole but wasn't.

Shall I drill it or ream it to .250? Any specific instructions for sizing this hole?

Hardware call-out can be seen on 21-12, figure 3.

Thanks,

jeffw@sc47 · #2 12-20-2015, 08:48 AM

The BUSH-BZ .250X.375X.250 shown in Figure 1. to be inserted into each of the flap hinge brackets on the wing should accept the 0.25 AN4-7 bolt. Not there yet on my wings but I think that's the solution. >> stop, looking at wrong bracket!!

Looks like the Figure 3. part call-out W-1025A is actually FL-1007 > I need to go out to the shop and look at this stuff real-time.

My opinion after looking > the hole in the W-1025A is just shy of 0.25 and logically ought to be reamed to fit the 4-7 bolt snuggly. But, would it have been better if the W-1025A parts also had bushings in them as the FL-1007 does for addressing the wear between bearing surfaces of the steel bolt and the W-1025A hinge bracket?
My answer maybe > the bolt doesn't rotate in the W-1025A brackets because they press against the bushing that is inserted into the FL-1007?

Tom023 · #3 12-20-2015, 08:34 PM

I just completed this step and had no issues with the AN4 bolt fitting into the F-1007 bracket holes as supplied at .250.

RV6-KPTW · #4 12-21-2015, 06:27 AM

Interesting. The holes in my FL-1007 look to be about ~ 5-10 thousands shy of .025. To tight for a snug or slip fit of the AN4 bolt. I will ream!

Tom023 · #5 12-21-2015, 07:42 AM

One thing you may find is that when you go to attach the flap to the wing you will be short two NAS1149F0463P washers, or at least I was. No biggie as I ordered an assortment of rivets, bolts, washers, etc. at the beginning of the build to have on hand. You need five of these washers per flap so 10 total. My bag 3016 parts list only specified 8 and that is what I received. Just a heads up if you don't have them and want to throw a few on your next Vans or Aircraft Spruce order.

RV6-KPTW · #6 12-22-2015, 06:23 AM

Thanks for the heads up!