This topic has been cursorily covered by How can I repair a tyre with a deep cut? before, but less with empirical evidence. Tire patches as mentioned there are not available in my local bike shops anyway, so I'm considering using tank tape instead. (Temporary. Buying new tire anyway..)
Tank tape is certainly gluey and strong enough I think. And I've already read a few people swear by it as tire reinforcment against punctures. However I have a few 1 cm rifts in the tire sidewalls, so that would hold a few weeks at best. - Unless there's a special glue one could apply to the tire outside as well...(?)
My actual concern: I would have to cover around a 1/3 of the inner tire walls. How would that impact the grip between tube and tire? The tank tape has a rather smooth/sleek surface.
I would assume the tire sits firm on the rim hook, and is otherwise hold by the tube pressure. But I'm not sure how much of a (physical) influence (%) the friction between tire and tube has. Is there any danger if one is partially covered by more slippery tape?