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Posted by Old_Pilot | Jun 14, 2020 @ 07:29 PM | 2,867 Views
Apparently there wasn't a nickname for the YA-9.....I'm calling it the "Grunt"

Got a bit more done.....still a ways to go though
Posted by Old_Pilot | Jun 08, 2020 @ 10:57 AM | 2,572 Views
Greetings all,

Most of my larger fuselages are cut from "1/2 nominal" pink Formular.....Unfortunately that "1/2" ranges from between 0.55 to 0.57 inches...so I decided to make a hotwire slab cutter for true 1/2" (12.2 mm) foam....

A piece of ply, some 1/2" square dowels, a couple of machine screws, some washers, knurled knobs, and a couple of stout die springs
Posted by Old_Pilot | Jun 06, 2020 @ 07:18 AM | 3,810 Views
Maiden didn't end well...she took off in trim, and I was flying her around at about half throttle, making sure of input response....no bad habits, good roll rate....then I decided to open the throttles all the way, and WHAM, the port ESC/EDF shut down...and she cartwheeled into the runway...broke her all to pieces. I knew I was at the upper limit of the ESC's (65 amp)....Obviously, I was too close....If I'd been 3 mistakes high, I probably could have saved her. As it was I about 10 feet off the ground at close to 80 mph.....Pretty good size debris field....it was spectacular !

Oh well, I'll build her again
Posted by Old_Pilot | Jun 01, 2020 @ 05:29 AM | 8,052 Views
Finally got to maiden her...still have a bit of flight surface tweaking to do, but the dead stick glide is perfect......

Das Ugly Cub (2 min 33 sec)

Posted by Old_Pilot | May 26, 2020 @ 05:47 AM | 13,931 Views
The Sr-81 was a disaster......only because I'd neglected to do routine maintenance on my CNC machine....nothing fit....so,

Back to tried and true methods......I found a 2-off from the early 1970's......the Northrop YA-9, which lost the competition to the A-10.
First blush is a 48" span with twin 70's (y'all know how I like my twins).

Generating the parts, pieces, templates today..will cut it out this week
Posted by Old_Pilot | Apr 25, 2020 @ 09:48 AM | 5,619 Views
Preliminary model

30" WS x 48" OAL.. twin 70's
Posted by Old_Pilot | Apr 23, 2020 @ 01:25 PM | 6,907 Views
30" WS x 48" OAL with twin 70's
Posted by Old_Pilot | Apr 20, 2020 @ 03:21 PM | 7,405 Views
Das Ugly Cub..down to push rods, control horns, and programming...still working on the graphics, but for all intents, she's done
Posted by Old_Pilot | Apr 19, 2020 @ 03:41 PM | 4,908 Views
Got the fuse done...and decided on the livery.......No, not Iron Crosses....for the Moroniels
Posted by Old_Pilot | Apr 14, 2020 @ 04:43 PM | 8,244 Views
Caution...NAKED WOOD pictures ahead....down to the fiddly bits and covering
Posted by Old_Pilot | Apr 03, 2020 @ 04:57 PM | 9,571 Views
There's an airplane in here.....I promise
Posted by Old_Pilot | Mar 30, 2020 @ 05:10 PM | 5,557 Views
Next...Das Ugly Cub...Ugly Stik wing with Cub tips and feathers....modified Stik fuse....68" span..still working on the details.....traditional balsa built up

Specs (so far):

68" wingspan 14" chord 9% Joukowski airfoil
4250 800kv motor
11x5 or 12x5 Xoar prop
5 channel T/E/A/R/F
Lemon 6 channel receiver with satellite
5000 mah 50c 6 cell
100 amp ESC with 5 amp SBEC
19 gram metal gear digital servos (may change to std size)

Finishing the drawings and preparing to generate the cut files
Posted by Old_Pilot | Mar 28, 2020 @ 07:42 AM | 7,178 Views
Down to control horns, push rods, programming, etc......I did this one to honor two good friends.one crewed S-3's on the America, and the other is Joel Maddox.....hence the tail art.....LOL

Specs:

48" KFM-2 wing, (2) 70 mm high output fans with 3400 kv motors, 85amp ESC's, 5000mah 50c 4 cell, 19 gram metal gear digital servos, T/E/A /F control, Lemon 6 channel receiver with satellite, 60 ounces all up..hope that helps
Posted by Old_Pilot | Mar 24, 2020 @ 05:44 AM | 11,678 Views
"Oh Lord, I'm suck in Lodi again...."

Replenishing the "fleet".....I built two of these previously and gave both away...they flew great...got a couple of new fans ,Sooooooo......Continue Reading
Posted by Old_Pilot | Mar 06, 2020 @ 09:05 AM | 6,626 Views
I'm 2 for 4 with this little girl.....both failures occured when I tried to put the fans internal of the fuse..never could get the efflux cone right...so I'm going back to the variant that flew, with a few changes......this version will be 1/2" pink foam, Elmer's board KF-2 wing, (2) 6 blade 70 mm fans with 3500 kv Motors, 80 amp esc's and a 5000 mah 50C 4 cell....I'll use this post as a build log.....finishing the drawings now
Posted by Old_Pilot | Mar 05, 2020 @ 08:13 AM | 8,282 Views
Less than an hour....(2)small piece of 1x6 common pine, and one of those lawnmower frame T-bolts with knob...Ideally, the little "keeper collars" should be brass to better accept solder..but you get the idea
Posted by Old_Pilot | Mar 02, 2020 @ 10:03 AM | 7,362 Views
Last toy for a while...thermoplastic vacuum table.....a bit of 1/2" and 1/4" ply, a cheap hot plate, and my shop vac..