Last Update: 31.01.2021
[⇐ 4. Empenage] | [⇑ Overview] | [6. Physics & Aerodynamics ⇒]
Servos
To my utter surprise and horror, the collective servo frame supplied with the kit turned out to be not solid but filled with a light filament structure. This, of course, no sooner than it was glued in for eternity and I tried to drill holes for the servo bolts. After piercing the upper skin of the frame, the drill more or less fell through to the lower skin.
I expect to remove and reinstall the servos – or at least to loosen the screws – several times for adjustments during the initial setup and the targeted lifetime of 5 years. The two tiny self-cutting threads per servo will never attain sufficient and persistent grip in this stuff to cope with the ailerons. But this time I have more luck than brains.
There is just enough room between the floor and the frame for an M2 threaded brass sleeve. The servo lugs are 1.8 mm and need some careful rework to allow for the new M2x8 screws.
Note that the servos 1 (elevator) and 2 (rudder) are slanted outwards to clear the ailerons‘ steering rods.
Antennae
Drilling holes in the tail boom is not a good idea, especially behind the trailing edge of the wing. This is a heavily strained area during discus-style launches. Care must be taken to avoid creating a weak spot here.
My Voltcraft BS-17 endoscopic USB camera comes in handy for working inside the narrow fuselage far behind the cockpit opening. But still, it takes a gifted modeller to accomplish the mission with the resin sticking to the sidewalls rather than smudging the camera’s lens.
Receiver
Standard receiver for my DLGs is Jeti’s R5L EX. To celebrate today’s successful exorcism of the White House (08.11.2020, Biden 306, Trump 232), I’ll suspend my personal embargo and go for Amercian produce this time. A Spektrum AR617T 6-channel receiver with telemetry and SAFE stabilizer is it going to be.
4.5 grams of bulky plastic casing are removed and replaced by a piece of clear shrinking tube.
Standard receiver for my DLGs is Jeti’s R5L EX. To celebrate today’s successful exorcism of the White House (08.11.2020, Biden 306, Trump 232), I’ll suspend my personal embargo and go for American produce this time. A Spektrum AR617T 6-channel receiver with telemetry and SAFE stabilizer is it going to be.
4.5 grams of bulky plastic casing are removed and replaced by a piece of clear shrinking tube.
I still must make up my mind whether the antennae need more protection or not. In case of off-field or off-hand landings they are shielded by the wing and the aileron horns against being hit by gravels or sturdy weeds. And behind there, they are well out of reach of the hands of clumsy pilots (some of which I happen know) awkwardly trying to grab the glider from the air upon landing. I guess I’ll leave them uncovered for a try.
Canopy
Why two pins on the back side? The sidewalls of the canopy are prone to bending outwards when it is being pinned down on the centre line at the extreme ends. That might spoil the tight fit of the canopy to the recesses in the fuselage, thus creating unwanted „cooling vents“.
These twin pins help to keep the sides down. In addition, it is a good idea to squeeze the canopy a little bit while the epoxy on the carbon patches on the pins is curing.
[⇐ 4. Empenage] | [⇑ Overview] | [6. Physics & Aerodynamics ⇒]