The Hook Up
is taken from a commercial glider operation I once managed in central Texas, where towering CB’s reign over the plains!
The 150 hp, Lycoming 0-320 Super Cub is a pretty standard tow plane, useful for its cost effectiveness. We had a plane, just like the plane, married to this old Duo Discus. Of course, “N” numbers have been changed to protect the innocent. The aircraft awaiting tow is a “Duo-Discus”, a very high performance, two-place sailplane. “Duo” – get it? The Duo Discus is a German creation, typical of their slippery slope sailplanes; after all, they have been doing this pretty much since Orv and Wilbuuur began having lunch at Kill Devil Hill.
“The Duo Discus replaced the Janus as Schempp Hirth’s high-performance two-seater trainer. Although it shares its name with the highly successful Standard Class Discus, any resemblance is only superficial. It first flew in 1993 and is still in production at the factory in Orlican in the Czech Republic. It has a 20-metre four-piece wing that is slightly swept forward so that the rear pilot is close to the centre of gravity. Its best glide ratio was measured as 44:1. An optional ‘turbo’ retractable two-stroke engine can be specified for extended gliding sessions.”
“44 :1” translates in real speak as: A reasonable 3000 AGL tow on a “booming” day and then drifting about beneath cloud streets for hours on end with vultures and eagles gazing from your wingtip as Debussy plays stereophonically in your ears. “Clair de Lune” at cloud base, another of life’s moments lost to memory . . .
Sorry, where was I? Oh yeah, procedures –
The “tow captain” gets a thumbs up from the Discus’ pilot for tow attachment, or “hook up”, whilst the tow pilot, with engine idling, checks his mirror to monitor the progress.
From here, the tow captain will attach the tow-rope and then clear the area. The sailplane pilot now waggles his rudder for the final go and the tow pilot waggles his in return acknowledgement as he begins taxiing out the two hundred feet or more of coiled line carefully looped beside the sailplane.
The wing runner awaits the tow-rope’s full extension as the signal to pick up the wing and dash the three to seven steps before the sailplane’s flying surfaces take authority.
On a gentle day, one can face a sailplane into the wind, sit in the cockpit and “fly” it level while sitting on the ground. The GIB (Guy In Back, usually the instructor) watches the wing-runner in anticipation of the wing being lifted. A girl friend looks on, awaiting her ride next.
One can see the half-full fuel level in the sight-gage through the cub’s skylight.
This was included as a reminder to never – ever – trust a fuel gage, – any – fuel gage. Always keep time in mind. I once lost track of time in a Cub and relying on its glass sight-gage, suffered fuel starvation. My tow, an orange flight-suited, ring-knocking, West Point grad flying a Rumanian Lark, with passenger aboard, refused to take the violently rocking wing signal to leave, so I reluctantly cut him loose, dropping the tow-rope onto a farmer’s property at the end of the runway.
This particular farmer was constantly at odds with the operation due to the noise bothering his animals and tow-ropes falling from the sky onto his property. For that reason, I always turned sharply when departing to the East and always dropped the rope at the other end of the field. Not long before, the farmer had read another pilot the riot act, vowing to never return another two-rope dropped onto his property as the lackadaisical flyer, dropping the rope before landing, would from time to time deposit it on the farmer’s property. I figured, “there goes the tow-rope, we’ll never get it back now.”
With a dead engine and no time to perform the usual emergency checks, I put the Cub into a radically steep, nose dive, making two 360 degree steep turns from around four hundred feet with a wind-milling propeller. I was far too low to pull the nose up and to stop the prop as this would have undoubtedly resulted in a fatal stall. With the wind-milling fan severely braking my forward speed and keeping me close to the stall, I rolled out of the second steep turn, with eyes glued to the starboard wing-tip now caressing the grass, (wingtip clearance becomes habit while spraying crops) just barely rolling out level the same instant the Cub’s wheels touched the grass runway. It was a perfect wheel landing. The momentum from the high landing speed carried me up the hill to the middle of the flying field where, along with the prop, I stopped directly in front of the fuel pumps. The maneuver was so adroit, no one at the operation realized there had been a problem.
Mopping my sweat-bathed forehead, I looked up at the sight-gage on the wing root to find the cork ball stuck halfway up the glass. Imagination had supplied nonexistent, red fuel beneath the small float indicator. Reaching up, I gently tapped the glass; instantly the cork ball dropped to the bottom of the sight-gage – after all that vibration. After refueling the Cub, I drove over to the farmer’s house hoping against hope he would let me recover the rope. I was surprised to say the least when he met me at the door with the coiled line. Handing me the neat coil, he said, “I saw the problem you had, how close it was and how that i***t wouldn’t get off tow, I understand”. I thanked him and went back for my next tow, wondering how a farmer knew so much about flying. After that, I began judiciously counting the number of tows – like there wasn’t a fuel gage. The ring knocker made a perfect pattern and brought the Lark in for a perfect landing. I told him, no more tows while I was managing.
When I retold the tale later, the only comment was, “why did you bother waggling your wings? You should have cut him loose the second you lost the engine.” Attempting to save a tow-rope might have cost me my life, but such stories are common in the professional aviator’s history.
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The kits are both of course from Revell Germany in 1/32 scale. Ya’ sure, I can see the German Duo Discus, but the all-American Cub? There’s irony in there somewhere. The girl
is a very expensive, (aren’t they all?) white metal casting from Aurora Figures Japan, no relation to the former American company. The Strombecker ground crew figures were grossly overpriced for what were once plastic, kid’s toys. There were five racing figures total, but only two passed position muster and thankfully, that was all I needed. The pilot figures are current styrene, race-car driver creations, except the one wearing the international orange flight suit.
He’s one of those rubbery creations that cannot be handled after painting as, for reasons unknown, the paint never really dries. This presented a challenge when squeezing him into the Duo Discus’ front cockpit. The five figure’s have nicely detailed heads, (found them on e-Bay, where else? If e-Bay goes, my modeling days are pretty much over) that came from China for a very reasonable price (see previous reference to e-Bay). They all had baseball hats molded-on, but fixed baseball caps are pretty much de rigueur for the soaring crowd anyway. I never thought modeling would turn me into a headhunter – literally. Seatbelts were made from a fabric Bandaid that lent a nice textured effect. These were painted black with silver release buckles and adjustments.
The Super Cub kit is nicely detailed, right down to the lifting handles and control cable fairings. The cockpit’s frame tubing is replicated from the full scale counterpart. As with its big brother, the kit’s engine assembly is also supported by a delicate structure that replicates engine mount tubing. After reviewing other difficult attempts and hearing about problems with engine and cowling alignment on the airframe, I built and painted the engine first, then installed it on the firewall before gluing on the cowling. This provided a neat, easily aligned package for attachment to the airframe. The rear, half-moon windows for the civil version were decals, provided to cover the greenhouse “glass” supplied for the military version. The decals didn’t cut it, so I cut out some fairings from thin styrene using the decal as a template. The greenhouse “glass” was slightly recessed into the fuselage structure and the sheet styrene filled the slight recess perfectly making a smooth surface with no transition, like the fabric covering on the full-scale version.
Note the gap on the Cub’s horizontal stabilizers?
On the full-scale bird, this allows clearance and prevents chafing of the fabric from the adjustable incidence stabilizers that serve as a trim tab of sorts, so don’t glue the stabilizers flush on this kit. I equipped the Cub with hydraulic disc brakes along with lines made from an old parallel cable’s wire. I even installed the red, ball-topped, tow release on the Cub’s floorboard that can barely be seen with a flashlight. The idling prop is a 1/48 scale “Propblur” as the 1/32 version is far too large for this airplane.
The Duo Discus was the motorized version, but I faired in the engine access doors and used American “N” numbers to hide its German heritage.
In spite of the fact I have four airbrushes, both subjects were shot with spray cans purchased from the local hardware. I shot the Cub with Duplicolor white and I must say Duplicolor provides an easy to apply, superior paint finish that goes on uniformly. The Duo Discus was shot with bright-white enamel and then coated with clear enamel before rubbing out with automotive rubbing paste to give it that polished-glass look.
The control surfaces of this glass ship are so finely faired into the wing as to provide a subtlety that, from this perspective, makes them almost invisible. Ok, so I sanded a bit too much, but I really wanted to highlight the glossy, mono-block appearance of these magnificently aerodynamic soaring creations as opposed to the chunky, clunky, satin-finished Cub.
Speaking of heavenly bodies, the “uptown girl’s” shape and pose is intended to set off the Duo Discus’ sensuous curves; that contrast is really why she stands waiting at the wingtip.
I suppose this is the reason sailplanes are frequently described as “sexy”. The tow-rope is over six feet of sail repair cord scaled to the 200 foot length.
The ground covering is yet another overpriced addition that provided the 1/32 scale, low turf, but it was exactly what I had been looking for so I bit the wallet. Modeling is expensive! Remember when you bought a kit for seventy-nine cents and the only “accessories” were a ten-cent tube of glue and maybe a couple of bottles of fifteen-cent paint about the size of your mom’s bottle of fingernail polish? And seatbelts? Yeah sure, we had those in our car.
Clear prop! Contact!
25 additional images. Click to enlarge.