there is only one type of "approved" tow rings set..these are from TOST (I
have them) don't know how it is possible to lose one of these rings..not if
they are the "approved" types...
but they are sold as ring pairs only
even on my website there is a warning regarding tow rings:
http://wingsandwheels.com/page30.htm directly from TOST
WARNING!
Recently, connecting ring pairs that do not comply with the LN 65091
standard have begun to appear on the German market. All type-approved tow
releases may be used only with a connecting ring pair that complies with the
1985 edition of this standard (Section 2.6 LBA-approved Operating Manual).
The ring pairs (presumably from Egger) are welded - this is explicitly
prohibited by LN 65091. They are not correctly dimensioned and will not
operate reliably with Tost tow releases. However, these ring pairs are even
being used in flying schools, sometimes with a "certificate of approval"
from the manufacturer.
These non-approved ring pairs damage the leading edges of the tow releases
and can cause the ring to jam in the tow release so that the release cannot
be activated.
It is to be expected that Germany will start seeing damage to tow releases
and problems with their operation similar to that already happening in the
Netherlands.
You should give some thought to the following points:

a.. If a release cannot be activated, the consequences can be fatal.
b.. The damage to the tow release necessitates replacing the housing or
the hook. The cost of this repair is far higher than the saving through
buying cheaper rings.
c.. If a tow release is operated with non-approved components, the
manufacturer's warranty becomes null and void. In addition, in the event of
a failure or accident, an insurance company can legitimately repudiate its
obligation to pay.
Further information on : http://www.tost.de/evers/edefault.htm

tim

Please visit the Wings & Wheels website at www.wingsandwheels.com

"brianDG303" wrote in message
...
In preparing our clubs tow lines for the season it seems we lost track
of 1/2 of a dual tow set, the small ring. I expect we will have to buy
the complete set but I have no idea where to find them- anyone know?

Thanks all
brian