Standard Cirrus 1973 (Grob) no water ballast

On Mon, 30 Sep 2019 13:37:34 -0700, Ian Simmonds wrote:

I have contacted Schemp Hirth as well to see if they can shed any
information on it.

According to Wikipedia, so this MUST be right!, the Standard Class
started in the late '50s, so think of a Ka6 as the archetypical original
spec Standard Class glider.

The rules changed to allow retracts in 1970 and water ballast in 1972.

My 201 Libelle was built in late '69 so must have been one of the first
to have retracts fitted as standard and was not fitted for water ballast,
which is just as well since my wing skins are glass/balsa/glass laminates.

However, it is a little odd that your '73 Std Cirrus didn't originally
carry water. After all, it was built after water ballast became legal for
the class in 1972. Maybe, as somebody said, it was an optional extra?


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Martin | martin at
Gregorie | gregorie dot org