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 ...