BTIZ wrote:

First I will ask a question, Is the Sparrow Hawk registered with an N-number
and does it have an Airworthiness Cert that it is a "glider"

If not your club needs to re-look at it's insurance, and your tow pilots at
their ratings.. They are certified to tow gliders, not any thing else, if
they are towing an ultra light that is not certified by the FAA as a
"glider" and has an N-number registration, they are in violation of FARs and
most likely the tow plane's insurance is in violation. At that point in time
it matters not if the "ultra light" has insurance or not.

So if it has an N number it's a glider and
if it doesn't it's an ultralight? If I paint an
orange yellow, is it a lemon? :P

If the federales ask at some point, it'd probably be
time to ask for a waiver. Banner, sparrowhawk, whatever.
If the insurers are willing to cover it, the
feds probably wouldn't even blink...especially since the
exact same aircraft with N number is fine...
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Mark Boyd
Avenal, California, USA