Cox PT-19's blog View Details
Posted by Cox PT-19 | Mar 24, 2020 @ 12:37 PM | 9,409 Views
Photo 1.---drawing the fuel out of my beautiful Goldberg "Shoestring" back in 1978, after cartwheeling the model across the grass.

What would really be thought of as a friendly sport model nowadays, the 1960's racer was a hand-full for me after learning to fly on Kevin's good-natured Kadet, and building a little time on my own Navigator. A painful lesson in that, just because a tali-dragger is on the ground, DOES NOT mean that it's finished flying.

The photo was also a lesson in the need to "pin" control surface hinges, as it's right aileron has pulled loose. If this happened gradually over time, it'd eventually result in a violent "re-kitting" of the plane.

But, she flew again, and had a pretty long life as my dumb thumbs got educated....Continue Reading
Posted by Cox PT-19 | Mar 22, 2020 @ 01:18 AM | 3,925 Views
Sleepless and messing with my video program.
Nothing but old engines, making racket and slinging castor oil.

Playing with Engines Out in the Shop (2 min 34 sec)

Posted by Cox PT-19 | Mar 15, 2020 @ 08:48 PM | 11,378 Views
The Navigator and Skylark are now ready for their white base coats, but need some less blush-worthy weather before I point a paint gun at them.

The Q-Tee is ready but for a little cosmetic stuff, which I wasn't in the mood for, so the Swap Meet Rescue Veco "Brave" became my first test of the doctor's exam table paper Andrew sent me a while back (thanks again Andrew!).

The paper's fibers don't seem to be quite as strong as my original silkspan, but it held together enough for me to dip it in water and blot it on some paper towels before doping it to the Brave's wing. It looks pretty good, so now, so I'm gonna gamble a couple coats of Brodak clear to see how it works.

It's builder had covered it with silkspan that had gone brittle with age, and also had done some filling work on it's forward fuselage. I intend just to clear-coat the bare wood (with sanding between coats) 'till I get a shine, then go with some base orange, with black & white trim. That's the plan at the moment......Continue Reading
Posted by Cox PT-19 | Mar 10, 2020 @ 07:22 AM | 5,445 Views
Yes...yet ANOTHER model airplane engine test.
You've been forewarned, so no whining allowed!

The spoils of last week's "Engine Sniping", this little Anderson Royal Spitfire (MAN, I love that name!) arrived yesterday, and went straight from the mail box to it's waiting test stand.

Test Running My 1950's Anderson Royal Spitfire .065 (1 min 26 sec)

Posted by Cox PT-19 | Mar 09, 2020 @ 09:01 AM | 5,251 Views
Still brushing on coats of Brodak clear dope on the Navigator, along with adapting engines to the Q-Tee's changeable firewall. While I was at it, I cut out a firewall for two Cox Tee Dee .020's I'm gonna fly on the little parasol. I'd originally called this mod "Hammerhead", 'till flying bud Tony "xplaneguy" referred to it as a "Board of Engines"...and the name stuck!

Hopefully have it ready to fly this coming weekend.

Test Run of the Q-Tee's "Board of Engines" (1 min 44 sec)

Other "Board of Engines" Applications:

Great Planes 'Fling' Sailplane Flying with Cox Tee Dee .010 Engines (2 min 8 sec)
...Continue Reading
Posted by Cox PT-19 | Mar 07, 2020 @ 05:47 PM | 7,220 Views
So, brushing another clear coat on one project while trying to decide whether or not to drag out the paint gun and shoot some color at the other, I split the difference and went to work on a third project (this why I 'bout never get these suckers finished).

My late Cousin Bill built this Cox/Sanwa "Q-Tee" back in the 1980's, eventually giving it to my Uncle Wayne. When Wayne gave it to me several years ago, it was in fair shape, though the wing's silkspan was very brittle, and it had some "nose rot" from all the castor oil that had been slung on it.

I finally got around to re-covering the wing, and while rebuilding it's snout, I decided to beef-up the area behind the new firewall, and modify it to take detachable "plates" of ply, that had engines pre-mounted to them. This way, I could cut a stack of ply plates, coat them with epoxy, and put any of my orphans on them without drilling multiple holes in the Q-Tee's firewall to match their mounting patterns.

My shop now has the aroma of both Brodak clear dope, and Sig 5-Minute Epoxy wafting through it.

Smells like "Model Airplane" in there!
Posted by Cox PT-19 | Mar 06, 2020 @ 03:29 PM | 3,854 Views
Got the little Ohlsson and Rice .049 going this morning.

I had to use a hair dryer to heat-soak the venturi area to free the needle valve and the unseen reed valve. It's mixture setting/RPM wandered around for a while (probably as old chunks of goop were breaking loose inside), before finally settling into a fairly steady run.

It's no power house, turning a 5-3 gray at around 10-12K, but the old dog is still running strong enough to drag a 2-channel plane around the sky.

Ohlsson and Rice 'Mite' 049 Test Run (1 min 5 sec)

Posted by Cox PT-19 | Mar 02, 2020 @ 07:44 PM | 5,952 Views
So, the "Engine Sniper" moves stealthily through the tall grass of internet anonymity, eyeing his Ebay target in the manner of a mountain lion stalking a fawn, with his PayPal locked and loaded as the time ticks down.

Cold-blooded, he has little compassion for his fellow model airplane nerds that he KNOWS are lusting after the same treasure...for THEY are JUST as cold and unfeeling...and deserve no mercy.

In a low whisper that barely crosses the darkened room, the Engine Sniper's utterance is more breath than spoken word,
"Not today, my friends...not today..."

With a few moments to spare, he allows himself to recall his victory of the previous evening, when he snapped an Ohlssen & Rice .049 from the midst of a group of week-long competing bidders...
With a sum so massive, it was akin to aiming a cannon at a hamster, he'd waited 'till the last 5 seconds to unleash the Fury of "Auto Bid". He then punched the "B" button.

His fellow nerd bidders were scattered like so many hyenas forsaking fresh carrion to a pride of hungry lions.

The surge of electronic money swamped and exhausted all other efforts, and then shut itself down after claiming it's prize with only a few dollars above the previously highest bidder. Before the dust had settled, it's seller had received payment, and the Engine Sniper once again disappeared into the internet marsh.

Now, the target is a fairly nice Anderson Royal Spitfire 065. From the 1950'...Continue Reading
Posted by Cox PT-19 | Feb 28, 2020 @ 08:21 AM | 3,024 Views
Got in some more work on the Goldberg Jr. Skylark project that's slowly creeping along.

The note is written to be understandable by those who have never experienced this type of old school finishing (and maybe flash-back material for those who have!).
Doping out in the shop...butyrate that is...

So the Skylark gets a layer of light silkspan applied to it's fuselage..."painted on" with Brodak clear dope, along with a little shaping work on it's tail cone.

This is the most "crafts-like" stage, with a lot of tissue trimming and using clear dope to bond it with the balsa, then using sand paper to trim away the excess. Makes the whole shop smell like "Model Airplane"...which, when I was kid, used to get me evicted from the front room to the front porch. Mom just didn't appreciate my version of "Aroma Therapy".

It'll get sanded and clear-coated 'till it starts to get a shine, or until I start seeing purple dust bunnies in my closed-window, winter time shop....Continue Reading
Posted by Cox PT-19 | Feb 21, 2020 @ 03:47 PM | 2,960 Views
Back in the 1980's (or maybe 90''s all starting to meld), my flying bud Neal and I got a couple of the newly released Cox R/C PT-19's. Made of molded foam, these are good-looking planes, with moderate performance from it's .049 Ranger (coincidentally, also the name of the full scale PT's engine).

We DID experience problems with getting the CG correct...even moving all the gear as far forward as we could, the model was still a bit tail-heavy, and would snap inverted if it's pilot got too frisky with pitch input. A chunk of lead ballast fixed the problem, but gave the .049 still more weight to drag through the sky.

I finally decided to "make the ballast work", and bolted a Medallion RC .09 to it's snout, spaced forward by a block of ply, and fed by a metal wedge tank suspended behind the firewall. The .09 was the exhaust band type, and worked really well...helping with the balance problem, AND turning the PT into a mean little ankle biter.

Neal followed suit...though his may have been powered by an O.S. .10, and we put on many impromptu Sunday pylon races, or dog fights (it was often difficult to tell the difference), with both planes amazingly surviving our crazy flying.

I'd like to get my old relic going for this year's S.M.A.L.L., again with it's .09 engine. The foam has survived in great shape, but the harder plastic parts are turning into cookie crumbs and will take some shoring up to be airworthy.
Posted by Cox PT-19 | Feb 04, 2020 @ 03:03 PM | 6,839 Views
Got the heat turned up in the shop on this cold, damp day.

The subject of my attention, for the moment, is the faithful Jetco Shark that flew it's heart out last Saturday.

It got a little Monokote patching, and some cleaning/oiling of it's old Enya .19 engine.

As I mentioned earlier, this is the same engine that flew in my Uncle Wayne's Shark in the 1960's. The .19 was on the large side for the .15-sized kit, but we flew what we had back then. It later powered another Shark I built in 1975, which was literally worn out and busted up when it hit the ground at a friend's farm in the 1980's. The carcass of this one now graces the entrance of my shop.

So this is the Enya's third ride in the nose of the Jecto kit. Below are some photos of us flying Sharks back in the day. Great memories, and in particular, the day flying bud Kevin and I smacked a couple Sharks together over Olmsted's ball park.

We'd painted them in very similar schemes/colors...maybe TOO similar as we forgot who was flying what...with our two Sharks doing a model airplane version of JAWS.

Kevin's plane rose up into mine, getting holes punched through it's left wing by my Shark's landing gear. I pulled up, unhooking the two models, but with my prop walking down the chord of Kevin's wing, chopping up his flap, and then cutting off most of his left stabilizer and elevator for good measure.

I got off easy...with a couple punctures and a broken prop, my Shark glided to the ground. Kevin's Shark,...Continue Reading
Posted by Cox PT-19 | Feb 02, 2020 @ 08:15 PM | 4,337 Views
First flight (for me) of a steel cable dog in 2020!

My Jetco "Shark" got in 6 full flights, and came home in one, attractive chunk!

No flying video/photos on this outing...maybe next time!!!
Posted by Cox PT-19 | Jan 29, 2020 @ 01:29 AM | 14,541 Views
Mud Dabber is a Sig Mk I "Kadet" I built in the early 1980's. It's name came from the way my grandma pronounced "mud dauber"...the type of wasp-like bugs that build their nests from mud "dabs" they pack through the air.

Drawing inspiration from Don McGovern's "Boondock Bird" design from the 1960's, Mud Dabber was intended to fly from any ole handy patch of dirt (or mud, if need be).

About the time of it's completion, the factory where I worked was sponsoring a "Run/Ride-a-Thon" for a charity, and I decided to make my contribution by way of having a "Fly-a-Thon", with Mud Dabber following the route.

A friend and fellow flyer donated the use of his pick-up, with another good friend manning the camera.

On the evening of the Run-a-Thon, we launched Mud Dabber from the parking lot of the factory, and set out on our adventure. In those great old "pre-terrorist" days, I never gave a thought to asking permission from the plant management, or the state park where we would be landing, and just went our free spirit way.

I'd equipped Mud Dabber with an auxiliary fuel tank under it's right wing, and intended to make the 9 mile flight non-stop. During test flights, the tank worked just fine, as long as I DID NOT try to throttle down Mud Dabber's O.S. 35FP engine. For reasons too nerdy to explain here, it had to stay at, or near, full power to keep running.

As we hit out, it quickly became obvious that Mud Dabber...Continue Reading
Posted by Cox PT-19 | Jan 22, 2020 @ 04:53 PM | 9,047 Views
Another afternoon spent working on "piddly stuff" with the Jr. Skylark. The servos were dry-fitted (and may get shuffled around) inside the fuse.

The original Skylark was designed NOT to have an elevator, so one was installed. The nacelles are also shaped and finished. Everything got sanded and I'm done with that stuff!

I'm also down to my last precious tube of Ambroid Airplane Cement! The end of an era!
Posted by Cox PT-19 | Jan 21, 2020 @ 01:24 AM | 10,568 Views
So, the second .020 adapted to it's backplate nicely, putting in a bunch of time on it's stand. Started easy, and settled into a 1/2 hour run after a little needle work.

Now it's time to turn to the Jr. Skylark.
Posted by Cox PT-19 | Jan 20, 2020 @ 08:34 PM | 9,553 Views
After several false recoveries, it appears that I AM actually doing that I cranked up the heat out in the shop for a break-in of Matt's "Black Lynx" .049 (THANK YOU ALL VERY MUCH AGAIN!!!)), along with my first test run of Bernie's .020 Pee Wee Backplate Assembly.

The Black Lynx was started up on Sig Champion 25% fuel, turning a 5-3 gray. I ran it for over 1/2 hour nonstop with refuels on the run. leaning it out to peak and back as the time passed. Toward the last 5 minutes, it was peaking in the mid 17k's, with good needle valve response.

While it may get some photo ops with the 2m B.O.T. before too long, it'll probably end up in my Cox Viper for this year's S.M.A.L.L. Fly-Ins.

THEN....I assembled an .020 with the new backplate I got from Bernie. I chose one of my healthier .020's, hoping for as little hassle as possible, and am proud to say it all went well.

The upper mounting holes are REAL snug for my #2 socket head servo screws, and I wanted a washer of some sort to keep them from digging into the plastic. So, I used a drill motor and Dremel to first, turn down the flange under the socket, and also rounded the flats of a couple #2 machine nuts.

Drilled out, the machine nuts became thick washers, and fit into the backplate's top two grooves pretty nicely. I know this all seems like a lot of fuss, and I'm totally prepared for someone to show me an embarrassingly easier way to do this. The little sucker looks good to me now though!

It started up after little coaxing, fired up and ran steadily...also for a 1/2 hour +. I'd lost my light, and was too lazy to set up an led lamp for the tach, but it was sounding like it was in it's zone.

Now, on to assemble another .020 and it's backplate for installation on my slowly moving Carl Goldberg Skylark project.
Posted by Cox PT-19 | Dec 16, 2019 @ 12:29 PM | 14,832 Views
So, my great friend, fellow Breezy Hill Flyer, musician, craftsman, veteran, and all-around-great-guy, Billy Lang made me a "model of a model", my beloved Lazy Bee!

Intended as a Christmas Tree ornament, it will instead spend it's days atop it's own personal rotating display stand next to my computer!

Posted by Cox PT-19 | Nov 30, 2019 @ 12:41 PM | 3,068 Views
So, the Breezy Hill Flyers' "Black Fly-Day" turned out to be

"Who is Nutty Enough to Fly Their Model Airplanes in Cold, Damp Air While Everybody Else is Staying Snug and Warm in Their Homes Day"

Well, guess who!
Thomas and I showed up on the hill, greeted by some definitely NON-inspirational weather. Low, gray clouds were tracking by, with a cold mist hanging in the air, but the rain was holding off, so the toys got dragged out.

Thomas brought his REALLY nice Lazy Bee, along with his big-wheeled "Kingfisher". I had my bedraggled, 25 year-old Lazy Bee and Mavic Drone.

As usual, the drone took video with no photos of it's self being taken, but also as usual, the Lazy Bee got Go Pros rubber-banded around it's airframe, with a bunch of stills pulled from the footage.

We got in several flights on each, with some photos and video going on, 'till finally packing it all in and heading home.

Still a good time and good visit. We're now looking forward to the winter swap meets, along with the New Year's Day and Frozen Finger Fun-Flys!...Continue Reading
Posted by Cox PT-19 | Nov 24, 2019 @ 09:32 AM | 8,411 Views
----From another thread about installing external fuel tank for .049 power in a Sterling Minnie Mambo------------

Little Traveler was, at first, going to make fuel stops along the way on it's flight for St. Jude Children's Research Hospital, using a Cox "Dragonfly" .049, as that was about the biggest engine-mounted tank offered. When a flying buddy heard about the project, and my trying to determine suitable landing/fueling sites along the way, he said, "Wuhl Hell! Why don't you just do it non-stop?" Wuhl Hell!!! Why Not!!!???

So, Little Traveler got some internal gutting, with a 4 oz Sullivan Tank tuned on it's side and shoved into it's cramped nose space. Like you, I just HAD to have a nose block (like my original Minnie) because, I thought it needed a nose block to suit my barely negotiable nostalgic demands.

I got a "Red Scorpion" .049 from Bernie at Cox International, and made a ply spacer to move it's prop out past the nose (the nose HAD to retain it's original shape---nostalgia again), and to also get the engine away from the firewall far enough to allow some "curl" in the silicone fuel line to keep it from kinking as it looped around to the brass tube epoxied in the ply next to the engine.

When fueling, I pull the plug from the internal line and pump fuel in 'till it comes out of the external vent/overflow tube. I do have to pull Little Traveler's wing to do this, but once filled, the Minnie is good for 30 minutes...Continue Reading
Posted by Cox PT-19 | Nov 18, 2019 @ 11:54 AM | 3,235 Views
So, got Rene's Medallion .049 on the stand this morning, and it's looking good.

Prop: Cox Black 5 x 3
Fuel: Sig 25%

Top end was in the mid-14k's, bottom end at about 6.5k.

Thank you again Rene!