RCU Forums - View Single Post - H9 Funtana problem with elevator joiner flexing
Old 11-03-2004 | 01:37 AM
  #11  
TManiaci's Avatar
TManiaci
Senior Member
My Feedback: (6)
 
Joined: Oct 2004
Posts: 1,492
Likes: 0
Received 0 Likes on 0 Posts
From: Temecula, CA
Default RE: H9 Funtana problem with elevator joiner flexing

Here is my fix on the Landing Gear. It's a 1/2 x 1 Balsa Spar trimmed to fit the contours in the floor over the front edge of the ply floor piece. In this new fuse, H9 has added a couple of ribs to beef up the LG mounting. They probably saw the many postings herein about the landing gear ripping out the floor of the fuse. My first Funtana that got planted by a bonehead on my freq, it didn't have these ribs. The spar is fasioned to overlap the forward lip of the ply floor piece AND ribs, hence the step you see at the bottom and notches. Using liberal amounts of 5 minute epoxy, it's tough as h-ll. I used just two screws to mount, but went with nylon to assure a better breakoff point if I really screw up a landing. It's a real light fix, and my CG is still dead center on the recomended range. As an engineer, I liked the idea of creating a box section rather than just thickening it with fiberglass.

I also did a real cool light-wieght fix on the tail feathers to make them super tough too. They shuddered terribly on the ground when you ran it up to full throttle (running a Saito 72 with a APC 13x6). I have no idea if they did that in the air, but it bugged me enough to make it better. Those two carbon fiber rods are a joke with the way they are installed, they pull out way too easy. I had to re-glue them before I ever got in a first flight, and I didn't do a shoddy job. Now it is solid as a rock. Yea, am an anal perfectionist, but not an expert pilot (yet), so I don't want to suffer some silly failure and crash from a structural issue. I am looking at the whole structure and all the postings... more fixes are in the works. Light weight and strutcural integrity is my goal. I'll need a tough plane while I learn how to do all this 3D stuff right.

TMan
Attached Thumbnails Click image for larger version

Name:	Ol31186.jpg
Views:	20
Size:	37.2 KB
ID:	189422   Click image for larger version

Name:	Sn41229.jpg
Views:	18
Size:	36.1 KB
ID:	189423