Dentdoc..

I was had the same idea and took all of Bob's weights and thru out was not needed and used my current electric set up , AXI, CC hv85 and Tanic 10s2p (4960 mah) and it is greater than 12 pounds...

Scott Anderson
Team Tanicpacks.com

Too bad about not being e-capable. But maybe not..... there are others... just spend more money.

Tonight was completion of the elev. servo/control setups. Many of you may be familiar with my fixation on slop-free nylon to nylon control interface points. To achieve this, I use the Sullivan 566 Control Takeoff on the movable surface, and the stock nylon JR arms on servos. Finished with Goldberg Nylon 2-56 clevises, the result is slop-free, solid, and relatively low friction control setups that stand the test of time. There are examples out there of mine probably with 700 or more flights, and still original nylon parts.

Anyway - some pics tell the story, along with a narrative about the stab marking, cutout, lining of the opening, etc.

The 3421SA's mount in the stab, vertically, output shaft forward, The stock arm is used, .5 shaft center to clevis attach. Perpendicular to the hinge line, draw a line 1" outboard of the root end of the STAB, extend this line on the elevator (ply hardmount plate), and along the stab (centerline for "box" for servo). About 1/8" in front of the front of the stab tube, mark the opening.... it is a smidge over 9/16 wide, and 1 5/16" long. Cutout the sheeting ONLY. Pry off sheeting. Remove foam all the way to the
top sheeting.

The cable will come out the forward end, so cut a hole in the root rib (it's soft balsa) to let you go through and grab the servo lead. In the cutout, remove a little more foam, then install vertical grain 1/16" sheeting on the AFT end of the servo cutout, and on the OUTBOARD side. The edge of the box lining sheeting should just clear UNDER the bottom sheeting, glue with gorilla glue (polyurethane). This ties the top and bottom sheeting together both chord-wise, and spanwise (at the tube). Very strong.

Gently cut and remove covering only - without cutting sheeting - about 1/4" around the "ends" of the cutouts. Make up 1/8" hard AC ply screw mounts, thick CA to the front and rear on the outside of the sheeting where you removed the covering.

What I do next is not needed, but I like the psych comfort.... on both "outboard" ends of the little ply strips that the servo screws will go into.... CAREFULLY drill a 3/32 " through the ply and sheeting. STOP. Now, using 3/32 sharpened TUBING, cleanly bore out the foam all the way to the TOP sheeting. Fill this hole with gorilla glue, then 3/32" dowel pieces. Effectively, you end up with four "corner" pins that tie the servo mount ply pieces to the sheeting, through the foam, then all the way to the TOP sheeting. Ain't NUTHIN' gonna get sloppy in this setup.

The "setback" for the jig is 5/16" from the edge of the elev. leading edge angle. Adjusted for perpendicular to chordline, pilot drilled, then drilled through with 1/8", thin CA the hole. When cured, drive the 6-32 SS Sullivan screw flush with top surface. On bottom, put drop of permanent loctite on threads, then tighten down reversed 6-32 blind nut.

Thread on the nylon control takeoff, measure with elev. neutral to hinge centerline, mark, and drill with 1/16". That's it.
Install the 2-56 Stainless thread rod/nylon clevises, adjust and it's good for life.

Any results with the plane in general, just bought one and very keen on feed back !!!!!

I won the last five Advanced contests in District four using this plane. O.S. 140Rx and a ES carbon pipe. I also used the PBG carbon stab and wing tubes. And Bolly Carbon landing gear. My plane ended up super tail heavy to the tune of nine count em nine ounces of nose weight. Will be moving the wing back this winter to get rid of the weight.

Dennis

Hey bob!

I'm curious how you shoehorned in that MVVS into the front!

I was horrified when I saw the size of the walbro hanging off the front of mine, and had nightmares of griding 9 tenths of my belly pan to fit the thing!

Pics! please!

Well i moved the wing back a quarter inch. Installed a MK tail wheel assembly. got rid of the nine ounces of lead. Unfortunately i experienced major and i mean major glitching. Was plain lucky to get it back on the ground. Have not figured out what happened but i can duplicate it. I changed the switch and a extension harness. during the change. so i don't know exactly what it is but sooner or later i will find it.

Dennis

Where do the instructions indicate the CG is supposed to be? I didn't get an instruction manual but managed to build the plane anyways, LOL.. I'm figuring right about the back of wing tube. and that's about where it balances right now with no added weight. Going to get first flight tomorrow.

http://b2b.promodels.be/Files/Instru...nual%20web.pdf

170 mm from the leading edge (according to the manual....)

errrrrrrrrrr, what happened to the build thread?

I know Bob sold the plane.......

Bob,
Would you happen to still have the instruction manual that came with this bird ? If so, I would really like to have a copy of it as my kit came with none. I would pay for the cost of copy and mailing. Thanks [email protected]