Bill,

I found that I have two Kopter catalogs that appeared to be identical. No catalog numbers or dates. Only changes are to the price list and that one catalog has the Bat and the other the Astros plus the first also has the Mini-saur vs the Delta Streak in the other.
The catalog with the Bat and Mini-saur appears to be a later catalog as the prices are higher...

The Bat is listed at 20.25" long and 0.71" diameter. Recommended motors are A83, B4-2, and C6-3
Streamer recovery

Hope this helps.

Chas

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Charles Russell, MSgt,USAF (ret.)
NAR 9790, Lvl 1
SAM "Balls Three"