RCU Forums - View Single Post - Extra Extra V2 - Build thread and showcase
Old 03-03-2009 | 04:31 PM
  #14  
guinnb's Avatar
guinnb
Member
My Feedback: (2)
 
Joined: Sep 2003
Posts: 83
Likes: 0
Received 0 Likes on 0 Posts
From: Sellersburg, IN
Default RE: Extra Extra V2 - Build thread

On to the final assembly...

Be sure to add 3/8" thickness doublers at all hinge locations just to be sure you have enough meat for the hinges. Some locations will not require this but check to be sure.

Cover all surfaces. To install the horizontal stabilizer cut a small section from the rudder vertical support. I cut this section in a wedge that gets tighter as it is pulled to the tail (for additional strength once it's glued back in). When cutting this section plan ahead for your rudder hinge locations and keep the cut out of these areas and where you can still get the h-stab and elevator in place. Once happy with the fit add glue and slide the h-stab in and square and true it to the fuse. A square on the fuse and against the stab will help as well as checking the front (or rear) outside h-stab tip distance to the rear wing anti rotation hole locations. Once this is done slide the elevator in and hinge it in place. Re-glue the piece you cut from the vertical rudder support back in place.

Next glue the vertical stabilizer in place keeping it on the fuse center line and parallel to the sides. Glue in tri-stock supports on the sides of the vertical stab where it meets the fuse.

At this point add the rudder tri-stock and cover. Hinge and install the rudder. Install a tail wheel of your choice.

Installation of landing gear is done by pre-drilling the proper size holes for the screws you plan on using (6-32 recommended) in the landing gear support dowels in the fuse. Then drill corresponding holes in both landing gear. Gear choice should be selected based on a 7-10 lb aircraft weight (due to motors ranging from 125 class motors to Gas Rail Mount Engines). Suggested gear are Swany's Mojo 65 Aluminum Gear, Graftech carbon fiber gear, JW high strength gear (hard to get), and Tetherite 90 size or giant scale gear.

Install the engine and fuel tank. Depending on your motor you may need to chamfer the mounts a bit for a good motor to rail fit. The motor mounts are designed with room to enlarge the space between them for larger motors. Just double check your clearance with the tubes. If the tubes will be hit by your motor mount bolts (has not yet been needed with engines up to a Satio 180 and YS 160DZ) glue a dowel inside the tubes where the bolt will pass through. This should maintain the structural integrity of the nose.

The fuel tanks are typically installed with eye hooks in the fuse above and below the tank. Be sure to center your tank on the fuse centerline. Put foam behind the tank and secure with either rubber bands or zip ties. Finish by plumbing the plane with fuel tubing.

Install all servos using 160oz+ servos on the tail and wings and a HS-85MG or similar for the throttle (per cut throttle hole can be enlarged for full size servo if desired). Use heavy duty control surface horns such as these Dubro options: http://www3.towerhobbies.com/cgi-bin...?&I=LXDCU2&P=7
http://www3.towerhobbies.com/cgi-bin...?&I=LXEMF7&P=7

Use heavy duty push rods (carbon push rods preferred, 4-40 has been used successfully on the ailerons. Add main gear wheels and axles.

Attached Thumbnails Click image for larger version

Name:	Jh14411.jpg
Views:	53
Size:	114.3 KB
ID:	1149635   Click image for larger version

Name:	Fb87713.jpg
Views:	56
Size:	113.3 KB
ID:	1149636   Click image for larger version

Name:	Af89156.jpg
Views:	61
Size:	48.9 KB
ID:	1149637   Click image for larger version

Name:	Oi16054.jpg
Views:	50
Size:	41.5 KB
ID:	1149638   Click image for larger version

Name:	Kv16239.jpg
Views:	63
Size:	39.7 KB
ID:	1149639   Click image for larger version

Name:	Xo91137.jpg
Views:	55
Size:	73.9 KB
ID:	1149640