glide ratios?

Jay,

The prototype is shown in ground effect and the Tri-Q out, correct? Looking forward to how you found out the drag data for a Tri-Q!

Also sorry for fat-fingering your positive karma

Hi Lex,
Not to rule that out completely. Each plane flies differently. But the actual independent flight test data for N81QA (factory demonstrator) done in 1984 shows:
80 mph IAS: descent rate: 625 fpm
90 mph IAS: descent rate: 857 fpm
100 mph IAS: descent rate: 1111 fpm
110 mph IAS: descent rate: 1154 fpm

Good Catch! Here is the plot for the Q-200 out of ground effect. Similar, but not the same.

Jay