I need help with flap

itisgood · Post by **itisgood** » Thu Mar 31, 2011 5:03 pm

I am about ready to drill through the skin the hole for the flap push rod.
It seems to me that the hole does not line up directly below the flap arm.
What is the solution for the misalignment?
Thanks
Dave

BSwayze · Post by **BSwayze** » Fri Apr 01, 2011 1:05 am

Hey Dave,

Could you clarify your question just a bit? I'm unclear which hole you're talking about. Is it a hole through one of the flap parts, or through the fuselage? The part number, or a picture would really help.

hydroguy2 · Post by **hydroguy2** » Fri Apr 01, 2011 6:13 am

Dave, for a starting point, hang the flap. Then lift the flap into position, as you do you can see where the linkage attachment point matches up with the fuselage. That's one end that has to fit when everything is retracted. The other end of the travel range is set by 40* down flap.

I think it took many many attempts to get everything opened up enough for clearance at all points of travel.

cjensen · Post by **cjensen** » Fri Apr 01, 2011 9:12 am

This is how I started that hole, retracted position (push rod unhooked and flap dangling)-

Then I put the actuator rod in place to get the down position-

Then worked the hole to make sure I had clearance thru the range-

Hope that helps ya...

itisgood · Post by **itisgood** » Fri Apr 01, 2011 3:05 pm

Bruce,
the hole that is pictured by Chad is the one that I am talking about. The Flap rod that penetrates through the skin and attaches to the flap. That hole is not lined directly below the Actuator bracket.

I can see by the pictures that were posted that it is not a straight through, but is elongated to match the flap travel.
Good that settles the question.
I looked on my of the RV7A build webs and did not see that issue brought up.

Thanks so much guys, you re really great!

Dave

BSwayze · Post by **BSwayze** » Fri Apr 01, 2011 8:52 pm

The other guys did a great job showing you how it's done. I did the slow, careful, iterative work cutting the hole on the first one. It's an odd-shaped hole, as you can see.

But once the first one was done, I made a simple paper template for the other side. My reference points were the 6th and 7th rivets, counting back from the rear wing spar bracket. It saved me a ton of time on the 2nd one!

I have lots of pictures and a detailed discussion of how I did this on my log page here, including the tools I used:

http://www.europa.com/~swayze/RV-7A/Fus ... 01114.html

I recently gave my template to a local friend building an RV-7A. I'm anxious to hear how his turns out.