More 3's?

On 18/01/2018 05:14, wrote:

Maybe I am just biased being a South African - but I am thinking the Germans have some catching up to do in the next few years. The JS-3 is going to be unbeatable in 15m and 18m Classes - and the JS-1c will still be very competitive in the Open Class in any competition. This advantage will be even greater where wingloading is a factor (strong days) and especially where it's weight that's limited, and not wingloading (like the Sailplane GrandPrix).


I am also a biased South African :-). With 3 declared 1250km FAI
triangles logged on OLC in 2018, the JS3 is clearly very competitive.
But the most remarkable thing that the Jonker's achieved is the time
line for the progress from concept - prototype - competition results
- production - certification. In terms of competitive flying, I think
the Jonkers have the advantage for a while (unless the IGC reinvents the
rules).

But in terms of the market, a lot will depend on engine packages, all of
the manufacturers have a lot of work to do, with both self launchers and
sustainers. I have seen both S-H and Schleicher "self launchers" opting
to take aerotows this season (for heat, maintenance or serviceability
reasons) as well as outlandings from self launchers and sustainers. The
FES's got grounded due to battery fires :-( The only package that seems
to be delivering consistently reliably seems to be the DG's, but they do
not feature in the competitions. And the engine packages are ALL high
maintenance!

Ian

DG self launchers use the same Solo engine/Binder pylon systems as SH, EB (Binder) and HPH.

On 18/01/2018 11:52, wrote:

DG self launchers use the same Solo engine/Binder pylon systems as SH, EB (Binder) and HPH.

There are a few DG400's and DG500's at our club. I think they still have
Rotax engines. But they all seem to have better climb performance than
the self launching Ventus, Arcus and ASG 32.

Maybe DG tolerate heavier, bulkier and more draggy installations in
return for better climb performance. Or maybe the older airframes have
thicker profiles and less wing loading which gives them a better climb rate.

Ian

PS: I was wrong about the JS3. They have now flown 4, not 3, declared
1250 FAI triangles in 2018. Watch this space ...