Mithy's Green Flag SX w/WWW170

**Mithrandir** · 12-15-2008, 10:47 PM

OK... this one I really intend to finish soon!!! Really.....

I have mounted the Elevator Servos... that is a no brainer... and mounted one Aileron set of servos... these are simply a matter of unbolting from FUTABA Scheme SX and screwing into Green Flag SX....

The work will be in the WWW170 Installation and the Rudder rack and locating Regs, Batts, Rx's and RRS...

I decided to use a WWW170 instead of a DA150... long story... but here are a couple pix... one picture shows the two next to each other for comparison....

Name: new_motor.jpg
Views: 116
Size: 58.8 KB

Name: WWW-vs-DA.jpg
Views: 156
Size: 54.2 KB

**Mithrandir** · 12-15-2008, 10:56 PM

This plane I stole... I mean purchased from "Coque Diesel/Storm-Trooper"... rather our very own resident foriegn bleeding heart liberal Jens!! (he he he he.... he knows I love him in a manly way!!!

)

Any how... Jens enjoys experimenting with various different motors... and I believe he had an Evo 150 and a Kroma 180 on this plane....

So.. the firewall had a few sets of motor mount holes in it that I wanted to fix... plus... Comp-Arf does not do a very good job of bonding that ply plate to the front of the fuse anyway.... Ron and I have had to add fasteners in the corners of this plywood plate to prevent it from pulling up the corners!!!
So... I added a thin piece of 1/8" AirCraft Ply with the proper hole pattern to the front of the plane after I sanded the paintoff. I 30 minute epoxied the plate on and after it cured, I covered the ply region with carbon and the side regions with a layer of 4 ounce/yd^2 S-Glass....

Then I made small 1/4" AC-Ply "T-Nutplates" and bonded them in place using RTV and I mounted the motor...

Name: new_bolt_pattern.jpg
Views: 119
Size: 55.0 KB

Name: SWB_4_Cntr_lines.jpg
Views: 112
Size: 56.9 KB

Name: T-nutplates-01.jpg
Views: 124
Size: 50.6 KB

Name: t-nutplates-02.jpg
Views: 118
Size: 44.1 KB

Name: www170_mounted-01.jpg
Views: 129
Size: 59.3 KB

**Mithrandir** · 12-15-2008, 11:10 PM

Next, I split some Tygon down the middle lengthwise and used "Goop" to bond it to the thru holes for the ignition wires.... and a short length of "Armour-Flex" for the sensor wire... I also will Heat Shrink the sensor wire and secure the plug into the Ignition Module.

Name: DSCF6139.JPG
Views: 118
Size: 65.8 KB

Then I had to grind a little bit off some unused boss by the throttle arm on the carb with a dremel and a grinding disk... be sure to protect any opening of the motor so it doesn't get alu particles inside!!

Name: carb_grind_clearance.jpg
Views: 126
Size: 48.5 KB

**Mithrandir** · 12-15-2008, 11:13 PM

Next I located the ignition switch... I wanted to locate it in an area with a single color of paint.... so if the hole ever needs to be repaired.. it will be an easier repair... I selected a location on the right side ahead of the main gear... turns out this is not the best location.. the composite skin is fairly thick here... prolly .080" thick... but it is what it is....

Name: switch-01.jpg
Views: 99
Size: 18.7 KB

Name: switch-02.jpg
Views: 102
Size: 29.2 KB

**Mithrandir** · 12-15-2008, 11:19 PM

so tonight I got the throttle linkage installed.... took a couple tries before I got the correct servo arm length.... (Longer throttle linkage then DA on the WWW).... and I got the travel volume ratio'd at 110% for the lower half and 118% for the upper half....

I had some precured carbon "L" material laying about and figured it would make a nice servo mount... so I did a little cutting and grinding and....

Name: carbon_servo_mount-01.jpg
Views: 97
Size: 36.2 KB

Name: carbon_servo_mount-02.jpg
Views: 95
Size: 40.2 KB

Then I setup the throttle pushrod and got the linkage to work freely from full to closed... and used two 8-32 screws with "T-Nuts" to mount to the engine dome.... I will put some RTV on the threads to prevent the vibration from rattling them out!!