On Thursday, June 27, 2019 at 2:35:38 PM UTC-7, Martin Gregorie wrote:

Not even that. Its single pin vs two pin spar designs. I've flown and
rigged both, single pin (Discus, Libelle, SZD Junior) and two-pin
(Pegase, ASW-20).

For my money a two-pin system is easier to rig because, once both wings
are fully home on the drag pins its just a matter of moving a tip up or
down until the first wing pin slips in. Then the second pin usually just
slides in without fuss.

By contrast, with a single pin system you have six or seven pins to line
up exactly (drag pins on both wings plus the two or three spigots on the
spar ends) before both wings will fit far enough in for you to even think
of putting the main pin in. This often involves considerable faffing
about and strange mutterings. Then the main pin goes in without any
trouble. FWIW Libelles and Kestrels can be easier to rig than SH gliders
because all pins and sockets are out in the open.


--
Martin | martin at
Gregorie | gregorie dot org

Agreed, Martin. Possibly the same with a JS3, since due to space constraints it uses the one pin and more-to-align technique. At least with the JS3 a side-hinged canopy isn't in the way.

Tim, please explain the brute force bit.
Is it the brutal hydraulic trailer ramp jack used to align the second spar pin? I really miss that simple assembly technique on the Duo.
Jim