On Saturday, July 4, 2015 at 8:38:55 AM UTC-7, Jonathan St. Cloud wrote:
The mixer is actually very different and Schleicher spent much time on this. So is the lay up schedule for the spar, and an extra layer of carbon on the wing. Wing root airfoil is different and the outboard sections of airfoil have been changed. The empty weight of a 29 compared to a 27 both at 15 meters is about 80 pounds.

My ASW 27B empty weight was 542 lbs with instruments and one battery. My ASG 29 in 15 Meter(serial # 16) is 585 lbs with the same instruments and one battery. In 18 Meter my ASG 29 weights 606 pds. Been weighted many, many times.

Later models of 29 weight did change due to wing layup. 29 mixer is "blueprinted" so all are exactly the same. On the 27 mixer each was hand made which might have caused a variable which was thought to be not measurable. Remember when the flaps and ailerons are preset at the factory, they are checked very closely as the different selections are made, i.e., from 1 to landing flap.
Same exact mold used for the 27 fuselage is used for the 29 fuselage. Rudders just slightly bigger. Been to the factory, been over this several times. Even saw the 15 meter tip molds when the were brand spanking new.
In 15 Meter the difference between the 27 and 29 will be max wing loading as the 29 will have the higher wing loading of 12.2 V 11.2 for a 27.

JS 1 Jet versus ASG 29 sub with electric start? Either one would be a great choice and its really a owners choice. JS 1 will bring a lower wing loading and better climb in weak conditions. The 29 will have a higher wing loading and better running performance in strong conditions. Either one will be countless smiles!

#711.