glide ratios?

Despite various web searches, I haven't been able to find L/D ratios for the Quickie family. (My dial-up connection and 10-year-old computer, taking over a minute to load some of your forum pages, for example, discouraged me from manually searching for glide ratios among the plans and manuals you have posted on this site. So I'm sorry if I'm asking a question with an obvious answer.)

Currently Wikipedia's Quickie page only lists some isolated facts plus the specs from Quickie Builders Association Q2 specs . I'd like to see L/D for Q1, Q2, Q-200, and maybe Dragonfly.

Typical glider: 30 to 1
Quickie: 9 to 1
Cessna: 4 to 1
Brick: 1 to 1

Actually a brick is 0' to 1'!

In my experience the Q-2 and Dragon Fly do glide much better than any Cessna. I did get to do an off airport (Interstate 75/4 in Florida) landing in a Dragon Fly and found it to glide excellently. I think the sink rate is a little (a lot) more in the Q-2.

Lex

I am finishing a study of aerodynamics of the Q-2 (LS-1 airfoil) and Tri-Q2. I will publish the full results on the QBA "members only" side of this site when the study is finished, but here are relevant answers to your question about whole aircraft lift to drag. The original prototype Q-200 N81QA at GW of 900 lb. and CG of 44" has max L/D of above 14:1, but you must fly around 75 mph CAS to achieve this L/D. As you might already know, L/D is a function of airspeed. The typical Tri-Q has L/D of slightly above 10:1, again at CAS less than 80 mph CAS. I am attaching the L/D vs. CAS graphs to this note.

Cheers,
Jay Scheevel, Tri-Q still building

Very interesting!

You put some work into this. Thank you.

Going back, way back to the late 80's, it seemed that the sink rate on the Q2 was higher below 100mph or so. This is not scientific, just an old guys seat of the pants memory.

Lex